diff options
| author | Liu, Jinsong <jinsong.liu@intel.com> | 2014-02-21 21:39:02 +0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-02-22 18:53:34 +0400 |
| commit | 56c103ec040b1944c8866f79aa768265c0dd2986 (patch) | |
| tree | 7201960f61ecfd19f3e78dfa6d6526822f055786 /arch/x86/include/asm/xsave.h | |
| parent | 49345f13f0830741b94b867cf906c4aad3988306 (diff) | |
| download | linux-56c103ec040b1944c8866f79aa768265c0dd2986.tar.xz | |
KVM: x86: Fix xsave cpuid exposing bug
From 00c920c96127d20d4c3bb790082700ae375c39a0 Mon Sep 17 00:00:00 2001
From: Liu Jinsong <jinsong.liu@intel.com>
Date: Fri, 21 Feb 2014 23:47:18 +0800
Subject: [PATCH] KVM: x86: Fix xsave cpuid exposing bug
EBX of cpuid(0xD, 0) is dynamic per XCR0 features enable/disable.
Bit 63 of XCR0 is reserved for future expansion.
Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/xsave.h')
| -rw-r--r-- | arch/x86/include/asm/xsave.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h index 554738963b28..dcd047b629ec 100644 --- a/arch/x86/include/asm/xsave.h +++ b/arch/x86/include/asm/xsave.h @@ -13,6 +13,8 @@ #define XSTATE_BNDCSR 0x10 #define XSTATE_FPSSE (XSTATE_FP | XSTATE_SSE) +/* Bit 63 of XCR0 is reserved for future expansion */ +#define XSTATE_EXTEND_MASK (~(XSTATE_FPSSE | (1ULL << 63))) #define FXSAVE_SIZE 512 |