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x86: Add TSX Force Abort CPUID/MSR
authorPeter Zijlstra (Intel) <peterz@infradead.org>
Tue, 5 Mar 2019 21:23:17 +0000 (22:23 +0100)
committerThomas Gleixner <tglx@linutronix.de>
Wed, 6 Mar 2019 08:25:41 +0000 (09:25 +0100)
commit52f64909409c17adf54fcf5f9751e0544ca3a6b4
treee61af1fcb70735394b1269070d5a763c52cf604ctree
parent11f8b2d65ca9029591c8df26bb6bd063c312b7fecommit | diff
x86: Add TSX Force Abort CPUID/MSR

Skylake systems will receive a microcode update to address a TSX
errata. This microcode will (by default) clobber PMC3 when TSX
instructions are (speculatively or not) executed.

It also provides an MSR to cause all TSX transaction to abort and
preserve PMC3.

Add the CPUID enumeration and MSR definition.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
arch/x86/include/asm/cpufeatures.h diff | blob | history
arch/x86/include/asm/msr-index.h diff | blob | history
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