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Re: [Qemu-devel][PATCH v6 1/6] x86/cpu: Rename XSAVE related feature wor
From: |
Sean Christopherson |
Subject: |
Re: [Qemu-devel][PATCH v6 1/6] x86/cpu: Rename XSAVE related feature words. |
Date: |
Tue, 13 Oct 2020 17:08:54 -0700 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Tue, Oct 13, 2020 at 01:19:30PM +0800, Yang Weijiang wrote:
> With more components in XSS being developed on Intel platform,
> it's necessary to clean up existing XSAVE related feature words to
> make the name clearer. It's to prepare for adding CET related support
> in following patches.
>
> Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
> ---
> target/i386/cpu.c | 60 ++++++++++++++++++++--------------------
> target/i386/cpu.h | 6 ++--
> target/i386/fpu_helper.c | 2 +-
> target/i386/translate.c | 2 +-
> 4 files changed, 35 insertions(+), 35 deletions(-)
>
> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> index 588f32e136..e2891740f1 100644
> --- a/target/i386/cpu.c
> +++ b/target/i386/cpu.c
> @@ -1050,7 +1050,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS]
> = {
> .tcg_features = 0,
> .unmigratable_flags = 0,
> },
> - [FEAT_XSAVE] = {
> + [FEAT_XSAVE_INSTRUCTION] = {
The COMP->XCRO change is great, but I don't think XSAVE->XSAVE_INSTRUCTION
makes sense. There is no guarantee the word will only be used for
instructions; it already blurs the line, e.g. XSAVEC also changes the behavior
of XRSTOR, and XSAVES also means the XSS MSR is available.
FWIW, I also don't find FEAT_XSAVE to be confusing.
> .type = CPUID_FEATURE_WORD,
> .feat_names = {
> "xsaveopt", "xsavec", "xgetbv1", "xsaves",
> @@ -1084,7 +1084,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS]
> = {
> .cpuid = { .eax = 6, .reg = R_EAX, },
> .tcg_features = TCG_6_EAX_FEATURES,
> },
> - [FEAT_XSAVE_COMP_LO] = {
> + [FEAT_XSAVE_XCR0_LO] = {
> .type = CPUID_FEATURE_WORD,
> .cpuid = {
> .eax = 0xD,
- [Qemu-devel][PATCH v6 0/6] Enable CET support for guest, Yang Weijiang, 2020/10/13
- [Qemu-devel][PATCH v6 2/6] x86/cpuid: Enable XSS feature enumeration for CPUID, Yang Weijiang, 2020/10/13
- [Qemu-devel][PATCH v6 4/6] x86/cpu: Add user-space MSR access interface for CET, Yang Weijiang, 2020/10/13
- [Qemu-devel][PATCH v6 3/6] x86/cpu: Enable CET components support for XSAVE, Yang Weijiang, 2020/10/13
- [Qemu-devel][PATCH v6 6/6] x86/cpu: Advise CET bits in CPU/MSR feature words, Yang Weijiang, 2020/10/13
- [Qemu-devel][PATCH v6 1/6] x86/cpu: Rename XSAVE related feature words., Yang Weijiang, 2020/10/13
- Re: [Qemu-devel][PATCH v6 1/6] x86/cpu: Rename XSAVE related feature words.,
Sean Christopherson <=
- [Qemu-devel][PATCH v6 5/6] x86/cpu: Add CET state support for guest migration, Yang Weijiang, 2020/10/13