Jamie Iles [Wed, 11 Jan 2017 00:57:54 +0000 (16:57 -0800)]
signal: protect SIGNAL_UNKILLABLE from unintentional clearing.
Since commit 00cd5c37afd5 ("ptrace: permit ptracing of /sbin/init") we
can now trace init processes. init is initially protected with
SIGNAL_UNKILLABLE which will prevent fatal signals such as SIGSTOP, but
there are a number of paths during tracing where SIGNAL_UNKILLABLE can
be implicitly cleared.
This can result in init becoming stoppable/killable after tracing. For
example, running:
while true; do kill -STOP 1; done &
strace -p 1
and then stopping strace and the kill loop will result in init being
left in state TASK_STOPPED. Sending SIGCONT to init will resume it, but
init will now respond to future SIGSTOP signals rather than ignoring
them.
Make sure that when setting SIGNAL_STOP_CONTINUED/SIGNAL_STOP_STOPPED
that we don't clear SIGNAL_UNKILLABLE.
If dm_btree_del()'s call to push_frame() fails, e.g. due to
btree_node_validator finding invalid metadata, the dm_btree_del() error
path must unlock all frames (which have active dm-bufio buffers) that
were pushed onto the del_stack.
Otherwise, dm_bufio_client_destroy() will BUG_ON() because dm-bufio
buffers have leaked, e.g.:
device-mapper: bufio: leaked buffer 3, hold count 1, list 0
Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org
(cherry picked from commit ed8b45a3679eb49069b094c0711b30833f27c734) Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
Eric Dumazet [Sat, 4 Feb 2017 19:16:52 +0000 (11:16 -0800)]
ipv4: keep skb->dst around in presence of IP options
Andrey Konovalov got crashes in __ip_options_echo() when a NULL skb->dst
is accessed.
ipv4_pktinfo_prepare() should not drop the dst if (evil) IP options
are present.
We could refine the test to the presence of ts_needtime or srr,
but IP options are not often used, so let's be conservative.
Thanks to syzkaller team for finding this bug.
Fixes: d826eb14ecef ("ipv4: PKTINFO doesnt need dst reference") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 34b2cef20f19c87999fff3da4071e66937db9644)
Eric Dumazet [Sun, 5 Feb 2017 07:18:55 +0000 (23:18 -0800)]
ip6_gre: fix ip6gre_err() invalid reads
Andrey Konovalov reported out of bound accesses in ip6gre_err()
If GRE flags contains GRE_KEY, the following expression
*(((__be32 *)p) + (grehlen / 4) - 1)
accesses data ~40 bytes after the expected point, since
grehlen includes the size of IPv6 headers.
Let's use a "struct gre_base_hdr *greh" pointer to make this
code more readable.
p[1] becomes greh->protocol.
grhlen is the GRE header length.
Fixes: c12b395a4664 ("gre: Support GRE over IPv6") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 7892032cfe67f4bde6fc2ee967e45a8fbaf33756)
Orabug: 25510593
CVE: CVE-2017-5897
]dhaval.giani@oracle.com: Added header to fix compile error] Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com> Reviewed-by: John Haxby <john.haxby@oracle.com>
iLO5 will offer the same watchdog timer as previous generations, but the
PCI subsystem vendor ID will be PCI_VENDOR_ID_HP_3PAR (0x1590) instead of
PCI_VENDOR_ID_HP (0x103c). Add 0x1590 to the whitelist and be more
specific when ignoring the 103c,1979 device.
Signed-off-by: Brian Boylston <brian.boylston@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
(cherry picked from commit fc113d54e9d7ef3296cdf2eff49c8ca0a3e5a482) Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
Commit 1717f2096b54 ("panic, x86: Fix re-entrance problem due to panic
on NMI") introduced nmi_panic() which prevents concurrent and recursive
execution of panic(). It also saves registers for the crash dump on x86
by later commit 58c5661f2144 ("panic, x86: Allow CPUs to save registers
even if looping in NMI context").
hpwdt driver can call panic() from NMI handler, so replace it with
nmi_panic(). Also, do some cleanups.
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Cc: Thomas Mingarelli <thomas.mingarelli@hpe.com> Cc: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit abc514c58059ca6f02df41798e828ffd864f1d21) Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
Commit 1717f2096b54 ("panic, x86: Fix re-entrance problem due to panic
on NMI") and commit 58c5661f2144 ("panic, x86: Allow CPUs to save
registers even if looping in NMI context") introduced nmi_panic() which
prevents concurrent/recursive execution of panic(). It also saves
registers for the crash dump on x86.
However, there are some cases where NMI handlers still use panic().
This patch set partially replaces them with nmi_panic() in those cases.
Even this patchset is applied, some NMI or similar handlers (e.g. MCE
handler) continue to use panic(). This is because I can't test them
well and actual problems won't happen. For example, the possibility
that normal panic and panic on MCE happen simultaneously is very low.
This patch (of 3):
Convert nmi_panic() to a proper function and export it instead of
exporting internal implementation details to modules, for obvious
reasons.
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Acked-by: Borislav Petkov <bp@suse.de> Acked-by: Michal Nazarewicz <mina86@mina86.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Cc: Javi Merino <javi.merino@arm.com> Cc: Gobinda Charan Maji <gobinda.cemk07@gmail.com> Cc: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit ebc41f20d77f6ad91f1f2d2af5147dc9bb6b5eea) Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
The asm macros for setting up and restoring the frame pointer
aren't currently being used. However, they will be needed soon
to help asm functions to comply with stacktool.
Rename FRAME/ENDFRAME to FRAME_BEGIN/FRAME_END for more
symmetry. Also make the code more readable and improve the
comments.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Bernd Petrovitsch <bernd@petrovitsch.priv.at> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Chris J Arges <chris.j.arges@canonical.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Pedro Alves <palves@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/3f488a8e3bfc8ac7d4d3d350953e664e7182b044.1450442274.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 997963edd912a6d77d68b2bbc19f40ce8facabd7) Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
Currently, kdump_nmi_shootdown_cpus(), a subroutine of crash_kexec(),
sends an NMI IPI to CPUs which haven't called panic() to stop them,
save their register information and do some cleanups for crash dumping.
However, if such a CPU is infinitely looping in NMI context, we fail to
save its register information into the crash dump.
For example, this can happen when unknown NMIs are broadcast to all
CPUs as follows:
CPU 0 CPU 1
=========================== ==========================
receive an unknown NMI
unknown_nmi_error()
panic() receive an unknown NMI
spin_trylock(&panic_lock) unknown_nmi_error()
crash_kexec() panic()
spin_trylock(&panic_lock)
panic_smp_self_stop()
infinite loop
kdump_nmi_shootdown_cpus()
issue NMI IPI -----------> blocked until IRET
infinite loop...
Here, since CPU 1 is in NMI context, the second NMI from CPU 0 is
blocked until CPU 1 executes IRET. However, CPU 1 never executes IRET,
so the NMI is not handled and the callback function to save registers is
never called.
In practice, this can happen on some servers which broadcast NMIs to all
CPUs when the NMI button is pushed.
To save registers in this case, we need to:
a) Return from NMI handler instead of looping infinitely
or
b) Call the callback function directly from the infinite loop
Inherently, a) is risky because NMI is also used to prevent corrupted
data from being propagated to devices. So, we chose b).
This patch does the following:
1. Move the infinite looping of CPUs which haven't called panic() in NMI
context (actually done by panic_smp_self_stop()) outside of panic() to
enable us to refer pt_regs. Please note that panic_smp_self_stop() is
still used for normal context.
2. Call a callback of kdump_nmi_shootdown_cpus() directly to save
registers and do some cleanups after setting waiting_for_crash_ipi which
is used for counting down the number of CPUs which handled the callback
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Aaron Tomlin <atomlin@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Baoquan He <bhe@redhat.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Dave Young <dyoung@redhat.com> Cc: David Hildenbrand <dahi@linux.vnet.ibm.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Gobinda Charan Maji <gobinda.cemk07@gmail.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Javi Merino <javi.merino@arm.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: kexec@lists.infradead.org Cc: linux-doc@vger.kernel.org Cc: lkml <linux-kernel@vger.kernel.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Seth Jennings <sjenning@redhat.com> Cc: Stefan Lippers-Hollmann <s.l-h@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ulrich Obergfell <uobergfe@redhat.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Link: http://lkml.kernel.org/r/20151210014628.25437.75256.stgit@softrs
[ Cleanup comments, fixup formatting. ] Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
(cherry picked from commit 58c5661f2144c089bbc2e5d87c9ec1dc1d2964fe) Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
barrier() is a big hammer compared to READ_ONCE(),
and requires comments explaining what is protected.
READ_ONCE() is more precise and compiler should generate
better overall code.
Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit b668534c1d9b80f4cda4d761eb11d3a6c9f4ced8) Signed-off-by: Brian Maly <brian.maly@oracle.com>
In-flight DMA from 1st kernel could continue going in kdump kernel.
New io-page table has been created before bnx2 does reset at open stage.
We have to wait for the in-flight DMA to complete to avoid it look up
into the newly created io-page table at probe stage.
Suggested-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 6df77862f63f389df3b1ad879738e04440d7385d) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Functions bnx2_reg_rd_ind(), bnx2_reg_wr_ind() and bnx2_ctx_wr()
can be called with IRQs disabled when netconsole is enabled. So they
should use spin_{,un}lock_irq{save,restore} instead of _bh variants.
Cc: Sony Chacko <sony.chacko@qlogic.com> Cc: Dept-HSGLinuxNICDev@qlogic.com Signed-off-by: Ivan Vecera <ivecera@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 6bc80629eefc3731f5881092bed610d994e05763) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Until interface is up [and assuming ringparams weren't explicitly
configured] when queried for the size of its rings bnx2x would
claim they're the maximal size by default.
That is incorrect as by default the maximal number of buffers would
be equally divided between the various rx rings.
This prevents the user from actually setting the number of elements
on each rx ring to be of maximal size prior to transitioning the
interface into up state.
To fix this, make a rough estimation about the number of buffers.
It wouldn't always be accurate, but it would be much better than
current estimation and would allow users to increase number of
buffers during early initialization of the interface.
Reported-by: Seymour, Shane <shane.seymour@hpe.com> Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 65870fa77fd7f83d7be4ed924d47ed9e3831f434) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Macro BNX2X_ALLOC_AND_SET(arr, lbl, func) calls kmalloc() to allocate
memory, and jumps to label "lbl" if the allocation fails. Label "lbl"
first cleans memory and then returns variable rc. Before calling the
macro, the value of variable rc is 0. Because 0 means no error, the
callers of bnx2x_init_firmware() may be misled. This patch fixes the bug,
assigning "-ENOMEM" to rc before calling macro NX2X_ALLOC_AND_SET().
Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 005f7e68e74df94c2a676b5a3e98c6fb65aae606) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Since offset is zero, it's not necessary to use set function. Reset
function is straightforward, and will remove the unnecessary add
operation in set function.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 0e24c0ad2b95f971c7af039080e7bd0a34b8b0dc) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Time Sync (PTP) implementation uses the divisor/shift value for converting
the clock ticks to nanoseconds. Driver currently defines shift value as 1,
this results in the nanoseconds value to be calculated as half the actual
value. Hence the user application fails to synchronize the device clock
value with the PTP master device clock. Need to use the 'shift' value of 0.
Signed-off-by: Sony.Chacko <Sony.Chacko@cavium.com> Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit a6e2846cacf97d4c70c5e923325b015cfa1e9053) Signed-off-by: Brian Maly <brian.maly@oracle.com>
The group list must be freed prior to freeing the command otherwise
we have a use-after-free.
Signed-off-by: Jason Baron <jbaron@akamai.com> Cc: Yuval Mintz <Yuval.Mintz@qlogic.com> Cc: Ariel Elior <Ariel.Elior@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit e96e0eded1335b9cfac71fcdd989d682eb3f8412) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Currently, we can have high order page allocations that specify
GFP_ATOMIC when configuring multicast MAC address filters.
For example, we have seen order 2 page allocation failures with
~500 multicast addresses configured.
Convert the allocation for the pending list to be done in PAGE_SIZE
increments.
Signed-off-by: Jason Baron <jbaron@akamai.com> Cc: Yuval Mintz <Yuval.Mintz@qlogic.com> Cc: Ariel Elior <Ariel.Elior@qlogic.com> Acked-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 3129e1599c6edfafc2a0a8be9f2eb344c7feb920) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Currently, we can have high order page allocations that specify
GFP_ATOMIC when configuring multicast MAC address filters.
For example, we have seen order 2 page allocation failures with
~500 multicast addresses configured.
Convert the allocation for 'mcast_list' to be done in PAGE_SIZE
increments.
Signed-off-by: Jason Baron <jbaron@akamai.com> Cc: Yuval Mintz <Yuval.Mintz@qlogic.com> Cc: Ariel Elior <Ariel.Elior@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit e8c6ae9fbf8ca70ef0c2de0d2f3995acb0dc8968) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Tested-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 736c4c1da76bc78d3013e791581725c11cd20ead) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
When PCI error is detected, in some architectures (like PowerPC) a slot
reset is performed - the driver's error handlers are in charge of "disable"
device before the reset, and re-enable it after a successful slot reset.
There are two cases though that another path is taken on the code: if the
slot reset is not successful or if too many errors already happened in the
specific adapter (meaning that possibly the device is experiencing a HW
failure that slot reset is not able to solve), the core PCI error mechanism
(called EEH in PowerPC) will remove the adapter from the system, since it
will consider this as a permanent failure on device. In this case, a path
is taken that leads to bnx2x_chip_cleanup() calling bnx2x_reset_hw(), which
then tries to perform a HW reset on chip. This reset won't succeed since
the HW is in a fault state, which can be seen by multiple messages on
kernel log like below:
bnx2x: [bnx2x_issue_dmae_with_comp:552(eth1)]DMAE timeout!
bnx2x: [bnx2x_write_dmae:600(eth1)]DMAE returned failure -1
After some time, the PCI error mechanism gives up on waiting the driver's
correct removal procedure and forcibly remove the adapter from the system.
We can see soft lockup while core PCI error mechanism is waiting for driver
to accomplish the right removal process.
This patch adds a verification to avoid a chip reset whenever the function
is in PCI error state - since this case is only reached when we have a
device being removed because of a permanent failure, the HW chip reset is
not expected to work fine neither is necessary.
Also, as a minor improvement in error path, we avoid the MCP information dump
in case of non-recoverable PCI error (when adapter is about to be removed),
since it will certainly fail.
Reported-by: Harsha Thyagaraja <hathyaga@in.ibm.com> Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Acked-By: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit b44e108b6f322eb5f20aa6eba39b468a1ffc10ff) Signed-off-by: Brian Maly <brian.maly@oracle.com>
When ndo_set_rx_mode() is called for bnx2x, as part of process of
configuring the new MAC address filters [both unicast & multicast]
driver begins by flushing the existing configuration and then iterating
over the network device's list of addresses and configures those instead.
This has the side-effect of creating a short gap where traffic wouldn't
be properly classified, as no filters are configured in HW.
While for unicasts this is rather insignificant [as unicast MACs don't
frequently change while interface is actually running],
for multicast traffic it does pose an issue as there are multicast-based
networks where new multicast groups would constantly be removed and
added.
This patch tries to remedy this [at least for the newer adapters] -
Instead of flushing & reconfiguring all existing multicast filters,
the driver would instead create the approximate hash match that would
result from the required filters. It would then compare it against the
currently configured approximate hash match, and only add and remove the
delta between those.
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit c7b7b483ccc9d64ae577a04d490aa9a975afe891) Signed-off-by: Brian Maly <brian.maly@oracle.com>
'm_io' is stored in 6 bits so it's a number in the 0-63 range. Static
analysis tools complain that 1 << 63 will wrap so I have changed it to
1ULL << m_io.
This code is over three years old so presumably the bug doesn't happen
very frequently in real life or someone would have complained by now.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Travis <travis@sgi.com> Cc: Nathan Zimmer <nzimmer@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kernel-janitors@vger.kernel.org Fixes: b15cc4a12bed ("x86, uv, uv3: Update x2apic Support for SGI UV3") Link: http://lkml.kernel.org/r/20161123221908.GA23997@mwanda Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit c4597fd756836a5fb7900f2091797ab564390ad0) Signed-off-by: Brian Maly <brian.maly@oracle.com>
An apparent oversight left a hardcoded '4' in place when
LOCKSTAT_POINTS was introduced.
The contention_point[] and contending_point[] arrays in the
structs lock_class and lock_class_stats need to be the same
size for the loops in lock_stats() to be correct.
This patch allows LOCKSTAT_POINTS to be changed without
affecting the correctness of the code.
Signed-off-by: George Beshers <gbeshers@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 68722101ec3a0e179408a13708dd020e04f54aab) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Currently, memmap_init_zone() has all the smarts for initializing a single
page. A subset of this is required for parallel page initialisation and
so this patch breaks up the monolithic function in preparation.
Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mel Gorman <mgorman@suse.de> Tested-by: Nate Zimmer <nzimmer@sgi.com> Tested-by: Waiman Long <waiman.long@hp.com> Tested-by: Daniel J Blueman <daniel@numascale.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Robin Holt <robinmholt@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Waiman Long <waiman.long@hp.com> Cc: Scott Norton <scott.norton@hp.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 1e8ce83cd17fd0f549a7ad145ddd2bfcdd7dfe37) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
mm/page_alloc.c
Currently each page struct is set as reserved upon initialization. This
patch leaves the reserved bit clear and only sets the reserved bit when it
is known the memory was allocated by the bootmem allocator. This makes it
easier to distinguish between uninitialised struct pages and reserved
struct pages in later patches.
Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mel Gorman <mgorman@suse.de> Tested-by: Nate Zimmer <nzimmer@sgi.com> Tested-by: Waiman Long <waiman.long@hp.com> Tested-by: Daniel J Blueman <daniel@numascale.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Robin Holt <robinmholt@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Waiman Long <waiman.long@hp.com> Cc: Scott Norton <scott.norton@hp.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 92923ca3aacef63c92dc297a75ad0c6dfe4eab37) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
mm/nobootmem.c
mm/page_alloc.c
Struct page initialisation had been identified as one of the reasons why
large machines take a long time to boot. Patches were posted a long time ago
to defer initialisation until they were first used. This was rejected on
the grounds it should not be necessary to hurt the fast paths. This series
reuses much of the work from that time but defers the initialisation of
memory to kswapd so that one thread per node initialises memory local to
that node.
After applying the series and setting the appropriate Kconfig variable I
see this in the boot log on a 64G machine
[ 7.383764] kswapd 0 initialised deferred memory in 188ms
[ 7.404253] kswapd 1 initialised deferred memory in 208ms
[ 7.411044] kswapd 3 initialised deferred memory in 216ms
[ 7.411551] kswapd 2 initialised deferred memory in 216ms
On a 1TB machine, I see
[ 8.406511] kswapd 3 initialised deferred memory in 1116ms
[ 8.428518] kswapd 1 initialised deferred memory in 1140ms
[ 8.435977] kswapd 0 initialised deferred memory in 1148ms
[ 8.437416] kswapd 2 initialised deferred memory in 1148ms
Once booted the machine appears to work as normal. Boot times were measured
from the time shutdown was called until ssh was available again. In the
64G case, the boot time savings are negligible. On the 1TB machine, the
savings were 16 seconds.
Nate Zimmer said:
: On an older 8 TB box with lots and lots of cpus the boot time, as
: measure from grub to login prompt, the boot time improved from 1484
: seconds to exactly 1000 seconds.
Waiman Long said:
: I ran a bootup timing test on a 12-TB 16-socket IvyBridge-EX system. From
: grub menu to ssh login, the bootup time was 453s before the patch and 265s
: after the patch - a saving of 188s (42%).
Daniel Blueman said:
: On a 7TB, 1728-core NumaConnect system with 108 NUMA nodes, we're seeing
: stock 4.0 boot in 7136s. This drops to 2159s, or a 70% reduction with
: this patchset. Non-temporal PMD init (https://lkml.org/lkml/2015/4/23/350)
: drops this to 1045s.
This patch (of 13):
As part of initializing struct page's in 2MiB chunks, we noticed that at
the end of free_all_bootmem(), there was nothing which had forced the
reserved/allocated 4KiB pages to be initialized.
This helper function will be used for that expansion.
Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Nate Zimmer <nzimmer@sgi.com> Signed-off-by: Mel Gorman <mgorman@suse.de> Tested-by: Nate Zimmer <nzimmer@sgi.com> Tested-by: Waiman Long <waiman.long@hp.com> Tested-by: Daniel J Blueman <daniel@numascale.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Robin Holt <robinmholt@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Waiman Long <waiman.long@hp.com> Cc: Scott Norton <scott.norton@hp.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 8e7a7f8619f1f93736d9bb7e31caf4721bdc739d) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
mm/memblock.c
test_pages_in_a_zone() does not account for the possibility of missing
sections in the given pfn range. pfn_valid_within always returns 1 when
CONFIG_HOLES_IN_ZONE is not set, allowing invalid pfns from missing
sections to pass the test, leading to a kernel oops.
Wrap an additional pfn loop with PAGES_PER_SECTION granularity to check
for missing sections before proceeding into the zone-check code.
This also prevents a crash from offlining memory devices with missing
sections. Despite this, it may be a good idea to keep the related patch
'[PATCH 3/3] drivers: memory: prohibit offlining of memory blocks with
missing sections' because missing sections in a memory block may lead to
other problems not covered by the scope of this fix.
Signed-off-by: Andrew Banman <abanman@sgi.com> Acked-by: Alex Thorlton <athorlton@sgi.com> Cc: Russ Anderson <rja@sgi.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Greg KH <greg@kroah.com> Cc: Seth Jennings <sjennings@variantweb.net> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 5f0f2887f4de9508dcf438deab28f1de8070c271) Signed-off-by: Brian Maly <brian.maly@oracle.com>
When running the SPECint_rate gcc on some very large boxes it was
noticed that the system was spending lots of time in
mpol_shared_policy_lookup(). The gamess benchmark can also show it and
is what I mostly used to chase down the issue since the setup for that I
found to be easier.
To be clear the binaries were on tmpfs because of disk I/O requirements.
We then used text replication to avoid icache misses and having all the
copies banging on the memory where the instruction code resides. This
results in us hitting a bottleneck in mpol_shared_policy_lookup() since
lookup is serialised by the shared_policy lock.
I have only reproduced this on very large (3k+ cores) boxes. The
problem starts showing up at just a few hundred ranks getting worse
until it threatens to livelock once it gets large enough. For example
on the gamess benchmark at 128 ranks this area consumes only ~1% of
time, at 512 ranks it consumes nearly 13%, and at 2k ranks it is over
90%.
To alleviate the contention in this area I converted the spinlock to an
rwlock. This allows a large number of lookups to happen simultaneously.
The results were quite good reducing this consumtion at max ranks to
around 2%.
[akpm@linux-foundation.org: tidy up code comments] Signed-off-by: Nathan Zimmer <nzimmer@sgi.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Nadia Yvette Chambers <nyc@holomorphy.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Mel Gorman <mgorman@suse.de> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 4a8c7bb59ac85b038c29adf6d32ff56e11fbb267) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Add the UV4-specific function definitions and define an operations struct
to implement them in the BAU driver.
Many BAU MMRs, although functionally the same, have new addresses on UV4
due to hardware changes. Each MMR requires new read/write functions, but
their implementation in the driver does not change. Thus, it is enough to
enumerate them in the operations struct for the changes to take effect.
Signed-off-by: Andrew Banman <abanman@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Mike Travis <travis@sgi.com> Acked-by: Dimitri Sivanich <sivanich@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: akpm@linux-foundation.org Cc: rja@sgi.com Link: http://lkml.kernel.org/r/1474474161-265604-11-git-send-email-abanman@sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 4f059d514f7119a4fdd9934189ff31f2c26b2647) Signed-off-by: Brian Maly <brian.maly@oracle.com>
The BAU on UV4 does not need to maintain the payload queue tail pointer. Do
not initialize the tail pointer MMR on UV4.
Note that write_payload_tail is not an abstracted BAU function since it is
an operation specific to pre-UV4 versions. Then we must switch on the UV
version to control its usage, for which we use uvhub_version rather than
is_uv*_hub because it is quicker/more concise.
Signed-off-by: Andrew Banman <abanman@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Mike Travis <travis@sgi.com> Acked-by: Dimitri Sivanich <sivanich@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: akpm@linux-foundation.org Cc: rja@sgi.com Link: http://lkml.kernel.org/r/1474474161-265604-10-git-send-email-abanman@sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 6d78059bbc0ace5461938aaea8cda95eb6719898) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Software timeouts are not currently supported on BAU for UV4. Instead, the
BAU will rely on hardware-level fairness protocols to determine broadcast
timeouts.
Do not call enable_timeouts or calculate_destination_timeout on UV4. These
functions write to pre-UV4 MMRs so they generate error messages on UV4.
Signed-off-by: Andrew Banman <abanman@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Mike Travis <travis@sgi.com> Acked-by: Dimitri Sivanich <sivanich@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: akpm@linux-foundation.org Cc: rja@sgi.com Link: http://lkml.kernel.org/r/1474474161-265604-9-git-send-email-abanman@sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit e879c1124a6c5c3367f20a254909605e7ee938c1) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Many BAU functions have different implementations depending on the UV
version. Rather than switching on the uvhub_version throughout the driver,
we can define a set of operations for each version. This is especially
beneficial for UV4, which will require many new MMR read/write functions.
Currently, the set of abstracted functions are the same for UV1, UV2, and
UV3. The functions were chosen because each one will have a different
implementation for UV4. Other functions will be added as needed to handle
new implementations or to cleanup the existing differences between UV1,
UV2, and UV3, i.e. read_status and wait_completion.
Signed-off-by: Andrew Banman <abanman@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Mike Travis <travis@sgi.com> Acked-by: Dimitri Sivanich <sivanich@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: akpm@linux-foundation.org Cc: rja@sgi.com Link: http://lkml.kernel.org/r/1474474161-265604-6-git-send-email-abanman@sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 5e4f96fe2a61c759d5d47f8112813618805c85a0) Signed-off-by: Brian Maly <brian.maly@oracle.com>
The BAU driver should use the functions provided by uv_hub.h rather than
its own implementations. uv_physnodeaddr converts vaddrs to paddrs for
BAU MMR fields, but this is done better by uv_gpa_to_offset.
Signed-off-by: Andrew Banman <abanman@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Mike Travis <travis@sgi.com> Acked-by: Dimitri Sivanich <sivanich@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: akpm@linux-foundation.org Cc: rja@sgi.com Link: http://lkml.kernel.org/r/1474474161-265604-5-git-send-email-abanman@sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 60e1c842c7ea3dd6a65660864554565cc737dd86) Signed-off-by: Brian Maly <brian.maly@oracle.com>
The payload queue first MMR requires the physical memory address and hub
GNODE of where the payload queue resides in memory, but the associated
variables are named as if the PNODE were used. Rename gnode-related
variables and clarify the definitions of the payload queue head, last, and
tail pointers.
Signed-off-by: Andrew Banman <abanman@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Mike Travis <travis@sgi.com> Acked-by: Dimitri Sivanich <sivanich@sgi.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: akpm@linux-foundation.org Cc: rja@sgi.com Link: http://lkml.kernel.org/r/1474474161-265604-4-git-send-email-abanman@sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit d2a57afa53f3fdf9f68d1f4240ace85a7d20ca20) Signed-off-by: Brian Maly <brian.maly@oracle.com>
This problem has actually been in the UV code for a while, but we didn't
catch it until recently, because we had been relying on EFI_OLD_MEMMAP
to allow our systems to boot for a period of time. We noticed the issue
when trying to kexec a recent community kernel, where we hit this NULL
pointer dereference in efi_sync_low_kernel_mappings():
[ 0.337515] BUG: unable to handle kernel NULL pointer dereference at 0000000000000880
[ 0.346276] IP: [<ffffffff8105df8d>] efi_sync_low_kernel_mappings+0x5d/0x1b0
The problem doesn't show up with EFI_OLD_MEMMAP because we skip the
chunk of setup_efi_state() that sets the efi_loader_signature for the
kexec'd kernel. When the kexec'd kernel boots, it won't set EFI_BOOT in
setup_arch, so we completely avoid the bug.
We always kexec with noefi on the command line, so this shouldn't be an
issue, but since we're not actually checking for efi_runtime_disabled in
uv_bios_init(), we end up trying to do EFI runtime callbacks when we
shouldn't be. This patch just adds a check for efi_runtime_disabled in
uv_bios_init() so that we don't map in uv_systab when runtime_disabled ==
true.
Signed-off-by: Alex Thorlton <athorlton@sgi.com> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: <stable@vger.kernel.org> # v4.7 Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Travis <travis@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1470912120-22831-2-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit f72075c9eda8a43aeea2f9dbb8d187afd4a76f0b) Signed-off-by: Brian Maly <brian.maly@oracle.com>
The latest UV kernel support panics when RHEL7 kexec's the kdump kernel
to make a dumpfile. This patch fixes the problem by turning off all UV
support if NUMA is off.
Tested-by: Frank Ramsay <framsay@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Reviewed-by: Nathan Zimmer <nzimmer@sgi.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160801184050.577755634@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 5a52e8f822374bebc702bb2688ed8b5515bbb55b) Signed-off-by: Brian Maly <brian.maly@oracle.com>
There are some circumstances where the UV4 BIOS cannot provide the
correct Proximity Node values to associate with specific Sockets and
Physical Nodes. The decision was made to remove these values from BIOS
and for the kernel to get these values from the standard ACPI tables.
Tested-by: Frank Ramsay <framsay@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Reviewed-by: Nathan Zimmer <nzimmer@sgi.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160801184050.414210079@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 22ac2bca92f2d92c6495248d65ff648182df428d) Signed-off-by: Brian Maly <brian.maly@oracle.com>
The UV4 Socket IDs are not guaranteed to equate to Node values which
can cause the GAM (Global Addressable Memory) table lookups to fail.
Fix this by using an independent index into the GAM table instead of
the Socket ID to reference the base address.
Tested-by: Frank Ramsay <framsay@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Reviewed-by: Nathan Zimmer <nzimmer@sgi.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160801184050.048755337@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 054f621fd5b1c7245710f5d3935c94ce6ae4b3b7) Signed-off-by: Brian Maly <brian.maly@oracle.com>
This patch fixes the problem of incorrect nodes and pnodes being returned
when referring to nodes that either have no cpus (AKA "headless") or no
memory.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215406.192644884@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit f68376fc9e6dc15a08e16f08c95e503f19ad8e34) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Use no-op messages in place of cross-partition interrupts when nacking a
put message in the GRU. This allows us to remove MMR's as a destination
from the GRU driver.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215406.012228480@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 40bfb8eedf1e7fa0535c685ff1000c05bcf7a637) Signed-off-by: Brian Maly <brian.maly@oracle.com>
This patch builds support for the new conversions of physical addresses
to and from sockets, pnodes and nodes in UV4. It is designed to be as
efficient as possible as lookups are done inside an interrupt context
in some cases. It will be further optimized when physical hardware is
available to measure execution time.
Tested-by: Dimitri Sivanich <sivanich@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215405.841051741@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit c85375cd19966d5dd854cd8b8eada9be8f21fac1) Signed-off-by: Brian Maly <brian.maly@oracle.com>
An aspect of the UV4 system architecture changes involve changing the
way sockets, nodes, and pnodes are translated between one another.
Decode the information from the BIOS provided EFI system table to build
the needed conversion tables.
Tested-by: Dimitri Sivanich <sivanich@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215405.673495324@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 6e27b91cf46834391c59062d3f26d277cc299f4b) Signed-off-by: Brian Maly <brian.maly@oracle.com>
With the UV4 system architecture addressing changes, BIOS now provides
this information via an EFI system table. This is the initial decoding
of that system table. It also collects the sizing information for
later allocation of dynamic conversion tables.
Tested-by: Dimitri Sivanich <sivanich@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215405.503022681@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 1de329c10d9fbac4031f8eb30c4921c6efbf9faa) Signed-off-by: Brian Maly <brian.maly@oracle.com>
UV4 uses a GAM (globally addressed memory) architecture that supports
variable sized memory per node. This replaces the old "M" value (number
of address bits per node) with a range table for conversions between
addresses and physical node (pnode) id's. This table is obtained from UV
BIOS via the EFI UVsystab table. Support for older EFI UVsystab tables
is maintained.
Tested-by: Dimitri Sivanich <sivanich@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215405.329827545@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit ef93bf803999445985acb25f4ed8772e1aa81221) Signed-off-by: Brian Maly <brian.maly@oracle.com>
UV4 requires early system wide addressing values. This involves the use
of the CPUID instruction to obtain these values. The current function
(detect_extended_topology()) in the kernel has been copied and streamlined,
with the limitation that only CPU's used by UV architectures are supported.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215405.155660884@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 405422d88c686e88b4241c0201fd96b61ab8bd77) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Migrate references from the blade info structs to the per node hub info
structs. This phases out the allocation of the list of per blade info
structs on node 0, in favor of a per node hub info struct allocated on
the node's local memory.
There are also some minor cosemetic changes in the comments and whitespace
to clean things up a bit.
Tested-by: Dimitri Sivanich <sivanich@sgi.com> Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215404.987204515@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 906f3b20da8c6ec3eeef81753b4af9b6780e2edc) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Allocate and setup per node hub info structs. CPU 0/Node 0 hub info
is statically allocated to be accessible early in system startup. The
remaining hub info structs are allocated on the node's local memory,
and shared among the CPU's on that node. This leaves the small amount
of info unique to each CPU in the per CPU info struct.
Memory is saved by combining the common per node info fields to common
node local structs. In addtion, since the info is read only only after
setup, it should stay in the L3 cache of the local processor socket.
This should therefore improve the cache hit rate when a group of cpus
on a node are all interrupted for a common task.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Reviewed-by: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215404.813051625@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 3edcf2ff7ae50d1096030fab9a1bafb421e07d4c) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Move references to blade local processor ID to the new per cpu info
structs. Create an access function that makes this move, and other
potential moves opaque to callers of this function. Define a flag
that indicates to callers in external GPL modules that this function
replaces any local definition. This allows calling source code to be
built for both pre-UV4 kernels as well as post-UV4 kernels.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215404.644173122@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 5627a8251f7861175b193a44dc3d8cb478d1135a) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Change the references to the SCIR fields to the new per cpu info structs.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215404.452538234@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit d38bb135d814e96811e1a0778564d7a2df922e28) Signed-off-by: Brian Maly <brian.maly@oracle.com>
The major portion of the hub info is common to all cpus on that hub.
This is step one of moving the per cpu hub info to a per node hub info
struct. This patch creates the small per cpu info struct that will
contain only information specific to each CPU.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215404.282265563@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 0045ddd23f21ad1964c01228257bc6c692e1c2f9) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Since UV3 and UV4 MMIOH regions are setup the same, we can use a common
function to setup both.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215404.100504077@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit a2f28e6950cec75320a8c3c8747a6e3ad08cfd2b) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Clean up any redundancies caused by new UV4 MMR definitions superseding
any previously definitions local to functions.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Reviewed-by: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215403.934728974@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit b608f87fe886d3ef7f9f8eb8ba58f45beb61c286) Signed-off-by: Brian Maly <brian.maly@oracle.com>
This adds the MMR definitions for UV4 via an automated script that uses
the output from a hardware verilog code to symbol converter. The large
number of insertions is caused by the UV4 design changing many similarly
named fields in MMR's that are named the same. This prompted the extra
production of architecture dependent field defines.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215403.580158916@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 0f0d84c08d38cc4c61fc04f94db0713aa82a39bc) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Cleanup patch to rearrange code and modify some defines so the next
patch, the new UV4 MMR definitions can be merged cleanly.
* Clean up the M/N related address constants (M is # of address bits per
blade, N is the # of blade selection bits per SSI/partition).
* Fix the lookup of the alias overlay addresses and NMI definitions to
allow for flexibility in newer UV architecture types.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215403.401604203@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit c443c03dd0d97620022483be6705ff611695a29c) Signed-off-by: Brian Maly <brian.maly@oracle.com>
This new function is generated by the UV MMR generation script to
identify MMR registers and fields that are not defined for a specific
UV architecture. With this switch, the immediate panic can be replaced
with a message and a bad return value allowing either hardware or the
emulator to diagnose the problem. It allows functions common to some
UV arches to use common defines that might not be fully defined for all
arches, as long as they do not reference them on the unsupported arches.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215403.231926687@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 7563421b13da21dd7a947f658b5299e65ed95cbe) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Add UV4 specific defines to determine if current system type is a
UV4 system.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215403.072323684@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit a0ec83f316e1d933d8c820d249972574324c2d25) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Add defines to control which UV architectures are supported, and modify the
'if (is_uvX_*)' functions to return constant 0 for those not supported.
This will help optimize code paths when support for specific UV arches
is removed.
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215402.897143440@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit e0ee1c97c3b1cabc3651d7bcf39c1f54d736fd20) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Tested-by: John Estabrook <estabrook@sgi.com> Tested-by: Gary Kroening <gfk@sgi.com> Tested-by: Nathan Zimmer <nzimmer@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Len Brown <len.brown@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160429215402.703593187@asylum.americas.sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit eb1e3461b8912ce4794fd2b7b414338a59461601) Signed-off-by: Brian Maly <brian.maly@oracle.com>
For several years, the common practice has been to boot UVs with the
"nobau" parameter on the command line, to disable the BAU. We've
decided that it makes more sense to just disable the BAU by default in
the kernel, and provide the option to turn it on, if desired.
For now, having the on/off switch doesn't buy us any more than just
reversing the logic would, but we're working towards having the BAU
enabled by default on UV4. When those changes are in place, having the
on/off switch will make more sense than an enable flag, since the
default behavior will be different depending on the system version.
I've also added a bit of documentation for the new parameter to
Documentation/kernel-parameters.txt.
Signed-off-by: Alex Thorlton <athorlton@sgi.com> Reviewed-by: Hedi Berriche <hedi@sgi.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1459451909-121845-1-git-send-email-athorlton@sgi.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 1c532e00a0c649ac6f0703e8c2e095c9c1d30625) Signed-off-by: Brian Maly <brian.maly@oracle.com>
this file got clocksource.h indirectly via fixmap.h - that stealth route
of header inclusion is now gone.
Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit d51953b0873358d13b189996e6976dfa12a9b59d) Signed-off-by: Brian Maly <brian.maly@oracle.com>
The ability to trigger a kdump using the system NMI command
was added by
commit 12ba6c990fab ("x86/UV: Add kdump to UV NMI handler")
Author: Mike Travis <travis@sgi.com>
Date: Mon Sep 23 16:25:03 2013 -0500
This is useful because when kdump is working the information
gathered is more informative than the original per CPU stack
traces or "dump" option. However a number of things can go
wrong with kdump and then the stack traces are more useful than
nothing.
The two most common reasons for kdump to not be available are:
1) if a problem occurs during boot before the kdump service is
started, or
2) the kdump daemon failed to start.
In either case the call to crash_kexec() returns unexpectedly.
When this happens uv_nmi_kdump() also sets the
uv_nmi_kexec_failed flag which causes the slave CPU's to also
return to the NMI handler. Upon this unexpected return to the
NMI handler, the NMI handler will revert to the "dump" action
which uses show_regs() to obtain a process trace dump for all
the CPU's.
Other minor changes:
The "dump" action now generates both the show_regs() stack trace
and show instruction pointer information. Whereas the "ips"
action only shows instruction pointers for non-idle CPU's. This
is more like an abbreviated "ps" display.
Change printk(KERN_DEFAULT...) --> pr_info()
Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: George Beshers <gbeshers@sgi.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Hedi Berriche <hedi@sgi.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit d0a9964e98731c708500a2e712f28f9d39183647) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
arch/x86/platform/uv/uv_nmi.c
UV: NMI: insert this_cpu_read accessor function on uv_hub_nmi.
On SGI UV systems a 'power nmi' command from the CMC causes
all processors to drop into uv_handle_nmi(). With the 4.0
kernel this results in
BUG: unable to handle kernel paging request
The bug is caused by the current code trying to use the PER_CPU
variable uv_cpu_nmi.hub without an appropriate accessor
function. That oversight occurred in
commit e16321709c82 ("uv: Replace __get_cpu_var")
Author: Christoph Lameter <cl@linux.com>
Date: Sun Aug 17 12:30:41 2014 -0500
This patch inserts this_cpu_read() in the uv_hub_nmi macro
restoring the intended functionality.
Signed-off-by: George Beshers <gbeshers@sgi.com> Acked-by: Mike Travis <travis@sgi.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Hedi Berriche <hedi@sgi.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 7c52198b9c36001d47e11d50f7f1556805c5c3e3) Signed-off-by: Brian Maly <brian.maly@oracle.com>
Recent PCI changes stopped exporting PCI constants if !CONFIG_PCI,
which made the UV build fail:
arch/x86/kernel/apic/x2apic_uv_x.c:843:16: error: ‘PCI_VGA_STATE_CHANGE_BRIDGE’ undeclared (first use in this function)
arch/x86/kernel/apic/x2apic_uv_x.c:1023:2: error: implicit declaration of function ‘pci_register_set_vga_state’ [-Werror=implicit-function-declaration]
As it's unlikely that an UV bootup will get far without PCI
enumeration, make the platform Kconfig switch (CONFIG_X86_UV)
depend on CONFIG_PCI=y.
Cc: Robin Holt <holt@sgi.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Russ Anderson <rja@sgi.com> Cc: Mike Travis <travis@sgi.com> Cc: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 1222e564cf4394af0b3c5e8a73330b20862c068b) Signed-off-by: Brian Maly <brian.maly@oracle.com>
[ Pulled from upstream discussion, not yet merged ]
When sending packet to destination that was not resolved yet
via path query, the driver keeps the skb and tries to re-send it
again when the path is resolved.
But when re-sending via dev_queue_xmit the kernel doesn't call
to dev_hard_header, so IPoIB needs to keep 20 bytes in the skb
and to put the destination address inside them.
In that way the dev_start_xmit will have the correct destination,
and the driver won't take the destination from the skb->data, while
nothing exists there, which causes to packet be be dropped.
The test flow is:
1. Run the SM on remote node,
2. Restart the driver.
4. Ping some destination,
3. Observe that first ICMP request will be dropped.
Fixes: fc791b633515 ("IB/ipoib: move back IB LL address into the hard
header") Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Signed-off-by: Noa Osherovich <noaos@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Tested-by: Yan Xu <jenny.x.xu@oracle.com> Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com> Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Johannes Weiner [Fri, 28 Oct 2016 00:46:56 +0000 (17:46 -0700)]
mm: memcontrol: do not recurse in direct reclaim
On 4.0, we saw a stack corruption from a page fault entering direct
memory cgroup reclaim, calling into btrfs_releasepage(), which then
tried to allocate an extent and recursed back into a kmem charge ad
nauseam:
On later kernels, kmem charging is opt-in rather than opt-out, and that
particular kmem allocation in btrfs_releasepage() is no longer being
charged and won't recurse and overrun the stack anymore.
But it's not impossible for an accounted allocation to happen from the
memcg direct reclaim context, and we needed to reproduce this crash many
times before we even got a useful stack trace out of it.
Like other direct reclaimers, mark tasks in memcg reclaim PF_MEMALLOC to
avoid recursing into any other form of direct reclaim. Then let
recursive charges from PF_MEMALLOC contexts bypass the cgroup limit.
Tejun Heo [Fri, 6 Nov 2015 02:46:17 +0000 (18:46 -0800)]
memcg: ratify and consolidate over-charge handling
try_charge() is the main charging logic of memcg. When it hits the limit
but either can't fail the allocation due to __GFP_NOFAIL or the task is
likely to free memory very soon, being OOM killed, has SIGKILL pending or
exiting, it "bypasses" the charge to the root memcg and returns -EINTR.
While this is one approach which can be taken for these situations, it has
several issues.
* It unnecessarily lies about the reality. The number itself doesn't
go over the limit but the actual usage does. memcg is either forced
to or actively chooses to go over the limit because that is the
right behavior under the circumstances, which is completely fine,
but, if at all avoidable, it shouldn't be misrepresenting what's
happening by sneaking the charges into the root memcg.
* Despite trying, we already do over-charge. kmemcg can't deal with
switching over to the root memcg by the point try_charge() returns
-EINTR, so it open-codes over-charing.
* It complicates the callers. Each try_charge() user has to handle
the weird -EINTR exception. memcg_charge_kmem() does the manual
over-charging. mem_cgroup_do_precharge() performs unnecessary
uncharging of root memcg, which BTW is inconsistent with what
memcg_charge_kmem() does but not broken as [un]charging are noops on
root memcg. mem_cgroup_try_charge() needs to switch the returned
cgroup to the root one.
The reality is that in memcg there are cases where we are forced and/or
willing to go over the limit. Each such case needs to be scrutinized and
justified but there definitely are situations where that is the right
thing to do. We alredy do this but with a superficial and inconsistent
disguise which leads to unnecessary complications.
This patch updates try_charge() so that it over-charges and returns 0 when
deemed necessary. -EINTR return is removed along with all special case
handling in the callers.
While at it, remove the local variable @ret, which was initialized to zero
and never changed, along with done: label which just returned the always
zero @ret.
Chuck Lever [Thu, 26 Jan 2017 20:14:52 +0000 (15:14 -0500)]
nfs: Fix "Don't increment lock sequence ID after NFS4ERR_MOVED"
Lock sequence IDs are bumped in decode_lock by calling
nfs_increment_seqid(). nfs_increment_sequid() does not use the
seqid_mutating_err() function fixed in commit 059aa7348241 ("Don't
increment lock sequence ID after NFS4ERR_MOVED").
Fixes: 059aa7348241 ("Don't increment lock sequence ID after ...") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Xuan Qi <xuan.qi@oracle.com> Cc: stable@vger.kernel.org # v3.7+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Orabug: 25416941
(cherry picked from commit 406dab8450ec76eca88a1af2fc15d18a2b36ca49) Signed-off-by: Todd Vierling <todd.vierling@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
Chuck Lever [Sun, 22 Jan 2017 19:04:29 +0000 (14:04 -0500)]
nfs: Don't increment lock sequence ID after NFS4ERR_MOVED
Xuan Qi reports that the Linux NFSv4 client failed to lock a file
that was migrated. The steps he observed on the wire:
1. The client sent a LOCK request to the source server
2. The source server replied NFS4ERR_MOVED
3. The client switched to the destination server
4. The client sent the same LOCK request to the destination
server with a bumped lock sequence ID
5. The destination server rejected the LOCK request with
NFS4ERR_BAD_SEQID
RFC 3530 section 8.1.5 provides a list of NFS errors which do not
bump a lock sequence ID.
However, RFC 3530 is now obsoleted by RFC 7530. In RFC 7530 section
9.1.7, this list has been updated by the addition of NFS4ERR_MOVED.
Reported-by: Xuan Qi <xuan.qi@oracle.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: stable@vger.kernel.org # v3.7+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Orabug: 25416941
(cherry picked from commit 059aa734824165507c65fd30a55ff000afd14983) Signed-off-by: Todd Vierling <todd.vierling@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
Algorithms not compatible with mcryptd could be spawned by mcryptd
with a direct crypto_alloc_tfm invocation using a "mcryptd(alg)" name
construct. This causes mcryptd to crash the kernel if an arbitrary
"alg" is incompatible and not intended to be used with mcryptd. It is
an issue if AF_ALG tries to spawn mcryptd(alg) to expose it externally.
But such algorithms must be used internally and not be exposed.
We added a check to enforce that only internal algorithms are allowed
with mcryptd at the time mcryptd is spawning an algorithm.
Link: http://marc.info/?l=linux-crypto-vger&m=148063683310477&w=2 Cc: stable@vger.kernel.org Reported-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit 48a992727d82cb7db076fa15d372178743b1f4cd) Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com> Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
Ngai-Mint Kwan [Wed, 2 Nov 2016 23:44:47 +0000 (16:44 -0700)]
fm10k: do not clear global mailbox interrupt bits
Partially revert commit 5e93cbadd3e9 ("fm10k: Reset mailbox global
interrupts", 2016-06-07)
The register bits related to this commit are now solely being handled by
the IES API. Recent changes in the IES API will allow an automatic
recovery from improper handling of these bits.
Signed-off-by: Ngai-Mint Kwan <ngai-mint.kwan@intel.com> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit f0524955177c3e5cea89ceec56ad9d538530fe4f) Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Ngai-Mint Kwan [Wed, 2 Nov 2016 23:44:46 +0000 (16:44 -0700)]
fm10k: request reset when mbx->state changes
Multiple IES API resets can cause a race condition where the mailbox
interrupt request bits can be cleared before being handled. This can
leave certain mailbox messages from the PF to be untreated and the PF
will enter in some inactive state. If this situation occurs, the IES API
will initiate a mailbox version reset which, then, trigger a mailbox
state change. Once this mailbox transition occurs (from OPEN to CONNECT
state), a request for reset will be returned.
This ensures that PF will undergo a reset whenever IES API encounters an
unknown global mailbox interrupt event or whenever the IES API
terminates.
Signed-off-by: Ngai-Mint Kwan <ngai-mint.kwan@intel.com> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit 2f3fc1e6200309ccf87f61dea56e57e563c4f800) Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Jacob Keller [Thu, 25 Aug 2016 21:06:54 +0000 (14:06 -0700)]
fm10k: use generic ethtool_op_get_ts_info callback
This generic callback is for drivers which have software Tx timestamp
support enabled. Without this, PTP applications requesting software
timestamps may complain that the requested mode is not supported.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit bab02a69296682881cae280587618978c357e26e) Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Jacob Keller [Tue, 9 Aug 2016 00:08:19 +0000 (17:08 -0700)]
fm10k: don't re-map queues when a mailbox message suffices
When the PF assigns a new MAC address to a VF it uses the base address
registers to store the MAC address. This allows a VF which loads after
this setup the ability to get the initial address without having to wait
for a mailbox message. Unfortunately to do this, the PF must take queue
ownership away from the VF, which can cause fault errors when there is
already an active VF driver.
This queue ownership assignment causes race condition between the PF and
the VF such that potentially a VF can cause FUM fault errors due to
normal PF/VF driver behavior.
It is not safe to simply allow the PF to write the base address
registers without taking queue ownership back as the PF must also
disable the queues, and this would impact active VF use. The current
code is safe because the queue ownership will prevent the VF from
actually writing but does trigger the FUM fault.
We can do better by simply avoiding the register write process when
a mailbox message suffices. If the message can be sent over the mailbox,
then we will not perform the queue ownership assignment and we won't
update the base address to be the same as the MAC address.
We do still have to write the TXQCTL registers in order to update the
VID of the queue. This is necessary because the TXQCTL register is
read-only from the VF, and thus the VF cannot do this for itself. This
register does not need to wait for the Tx queue to be disabled and is
safe for the PF to write during normal VF operation, so we move this
write to the top of the function above the mailbox message. Without
this, the TXQCTL register would be misconfigured and cause the VF to Tx
hang.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit 325782a173d1858bb67a827905e264cd128241d0) Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Jacob Keller [Thu, 23 Jun 2016 20:54:01 +0000 (13:54 -0700)]
fm10k: don't try to stop queues if we've lost hw_addr
In the event of a surprise remove, we expect the driver to go down,
which includes calling .stop_hw(). However, this function will return an
error because the queues won't appear to cleanly disable. Prevent this
and avoid the unnecessary checks by just returning when
FM10K_REMOVED(hw->hw_addr) is true.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit 5f45c83024c49f71e50cf8156b165f11d2ab35a9) Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Jacob Keller [Thu, 23 Jun 2016 20:31:01 +0000 (13:31 -0700)]
fm10k: don't continue probe if PCI device not in normal IO state
In the event of an uncorrectable AER error occurring when the driver has
not loaded, the recovery routines are not done. This is done because
future loads of the driver may not be aware of the IO state and may not
be able to recover at all. In this case, when we next load the driver it
fails due to what appears to be a surprise remove event. Instead, add
a check to ensure that the device is in the normal IO state before
continuing to probe. This allows us to give a more descriptive message
of what is wrong.
Without this change, the driver will attempt to probe up to our first
call of .reset_hw() which will be unable to read registers and act as if
a surprise remove event occurred.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit 18095937cb1c66b8ff944de02cf04d1497008352) Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Jacob Keller [Mon, 20 Jun 2016 17:39:32 +0000 (10:39 -0700)]
fm10k: NAPI polling routine must return actual work done
When fm10k_poll fully cleans rings it returns 0. This is incorrect as it
messes up the budget accounting in the core NAPI code. Fix this by
returning actual work done, capped at budget - 1 since the core doesn't
expect a return of the full budget when the driver modifies the NAPI
status.
Cc: Paolo Abeni <pabeni@redhat.com> Cc: Venkatesh Srinivas <venkateshs@google.com> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit e5fbfb78641ff0c5139ae665289ed9f91524265e) Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Jacob Keller [Fri, 17 Jun 2016 23:21:11 +0000 (16:21 -0700)]
fm10k: prefer READ_ONCE instead of ACCESS_ONCE
While technically not needed, as all our uses of ACCESS_ONCE are scalar
types, we already use READ_ONCE in a few places, and for code
readability we can swap all the uses of the older ACCESS_ONCE into
READ_ONCE.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit ce4dad2ce231aa5258ddfc98f8a80d958643c014) Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
projects / users / jedix / linux-maple.git / log