]> www.infradead.org Git - users/jedix/linux-maple.git/commitdiff
xen/acpi/sleep: Enable ACPI sleep via the __acpi_override_sleep
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Wed, 19 Oct 2011 17:08:25 +0000 (13:08 -0400)
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Wed, 19 Oct 2011 17:08:25 +0000 (13:08 -0400)
Provide the registration callback to call in the Xen's
ACPI sleep functionality. This means that during S3/S5
we make a hypercall XENPF_enter_acpi_sleep with the
proper PM1A/PM1B registers.

Based of Ke Yu's <ke.yu@intel.com> initial idea.
[ From http://xenbits.xensource.com/linux-2.6.18-xen.hg
change c68699484a65 ]

[v1: Added Copyright and license]
[v2: Added check if PM1A/B the 16-bits MSB contain something. The spec
     only uses 16-bits but might have more in future]
Signed-off-by: Liang Tang <liang.tang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
arch/x86/include/asm/xen/hypercall.h
arch/x86/xen/enlighten.c
drivers/xen/Makefile
drivers/xen/acpi.c [new file with mode: 0644]
include/xen/acpi.h [new file with mode: 0644]

index d240ea950519343231514be75f4e6a6cea15dd8f..0c9894e0ebfb599980efd3a71a64e417ff2aedc5 100644 (file)
@@ -45,6 +45,7 @@
 #include <xen/interface/xen.h>
 #include <xen/interface/sched.h>
 #include <xen/interface/physdev.h>
+#include <xen/interface/platform.h>
 
 /*
  * The hypercall asms have to meet several constraints:
@@ -298,6 +299,13 @@ HYPERVISOR_set_timer_op(u64 timeout)
        return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
 }
 
+static inline int
+HYPERVISOR_dom0_op(struct xen_platform_op *platform_op)
+{
+       platform_op->interface_version = XENPF_INTERFACE_VERSION;
+       return _hypercall1(int, dom0_op, platform_op);
+}
+
 static inline int
 HYPERVISOR_set_debugreg(int reg, unsigned long value)
 {
index 5525163a03985a517e7a043c3daa92fe04d4bb6e..6962653a1d2a41caa40bac2cd01225ac5bac6302 100644 (file)
@@ -42,6 +42,7 @@
 #include <xen/page.h>
 #include <xen/hvm.h>
 #include <xen/hvc-console.h>
+#include <xen/acpi.h>
 
 #include <asm/paravirt.h>
 #include <asm/apic.h>
@@ -1250,6 +1251,8 @@ asmlinkage void __init xen_start_kernel(void)
        } else {
                /* Make sure ACS will be enabled */
                pci_request_acs();
+
+               xen_acpi_sleep_register();
        }
                
 
index bbc18258ecc5419ec2210b83684afc528fecd0da..0b0058c151d9c304af6fc8c1bb69d260f9e43900 100644 (file)
@@ -16,7 +16,8 @@ obj-$(CONFIG_XENFS)                   += xenfs/
 obj-$(CONFIG_XEN_SYS_HYPERVISOR)       += sys-hypervisor.o
 obj-$(CONFIG_XEN_PLATFORM_PCI)         += xen-platform-pci.o
 obj-$(CONFIG_SWIOTLB_XEN)              += swiotlb-xen.o
-obj-$(CONFIG_XEN_DOM0)                 += pci.o
+obj-$(CONFIG_XEN_DOM0)                 += pci.o acpi.o
+obj-$(CONFIG_XEN_PCIDEV_BACKEND)       += xen-pciback/
 
 xen-evtchn-y                           := evtchn.o
 xen-gntdev-y                           := gntdev.o
diff --git a/drivers/xen/acpi.c b/drivers/xen/acpi.c
new file mode 100644 (file)
index 0000000..ba9a5d2
--- /dev/null
@@ -0,0 +1,65 @@
+/******************************************************************************
+ * acpi.c
+ * acpi file for domain 0 kernel
+ *
+ * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+ * Copyright (c) 2011 Yu Ke ke.yu@intel.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <xen/acpi.h>
+#include <xen/interface/platform.h>
+#include <asm/xen/hypercall.h>
+#include <asm/xen/hypervisor.h>
+
+int xen_acpi_notify_hypervisor_state(u8 sleep_state,
+                                    u32 pm1a_cnt, u32 pm1b_cnt,
+                                    bool *skip_rest)
+{
+       struct xen_platform_op op = {
+               .cmd = XENPF_enter_acpi_sleep,
+               .interface_version = XENPF_INTERFACE_VERSION,
+               .u = {
+                       .enter_acpi_sleep = {
+                               .pm1a_cnt_val = (u16)pm1a_cnt,
+                               .pm1b_cnt_val = (u16)pm1b_cnt,
+                               .sleep_state = sleep_state,
+                       },
+               },
+       };
+
+       if ((pm1a_cnt & 0xffff0000) || (pm1b_cnt & 0xffff0000)) {
+               WARN(1, "Using more than 16bits of PM1A/B 0x%x/0x%x!"
+                    "Email xen-devel@lists.xensource.com  Thank you.\n", \
+                    pm1a_cnt, pm1b_cnt);
+               return AE_ERROR;
+       }
+
+       if (skip_rest)
+               *skip_rest = true;
+
+       return HYPERVISOR_dom0_op(&op);
+}
diff --git a/include/xen/acpi.h b/include/xen/acpi.h
new file mode 100644 (file)
index 0000000..c981887
--- /dev/null
@@ -0,0 +1,58 @@
+/******************************************************************************
+ * acpi.h
+ * acpi file for domain 0 kernel
+ *
+ * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+ * Copyright (c) 2011 Yu Ke <ke.yu@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef _XEN_ACPI_H
+#define _XEN_ACPI_H
+
+#include <linux/types.h>
+
+#ifdef CONFIG_XEN_DOM0
+#include <asm/xen/hypervisor.h>
+#include <xen/xen.h>
+#include <linux/acpi.h>
+
+int xen_acpi_notify_hypervisor_state(u8 sleep_state,
+                                    u32 pm1a_cnt, u32 pm1b_cnd,
+                                    bool *skip_rest);
+
+static inline void xen_acpi_sleep_register(void)
+{
+       if (xen_initial_domain())
+               __acpi_override_sleep = xen_acpi_notify_hypervisor_state;
+}
+#else
+static inline void xen_acpi_sleep_register(void)
+{
+}
+#endif
+
+#endif /* _XEN_ACPI_H */