Typo in subject line (helper)
> On 26 Dec 2018, at 09:25, Yang Weijiang <weijiang.y...@intel.com> wrote:
>
> These functions are called when return CPUID xsave area
> size information.
>
> Signed-off-by: Zhang Yi <yi.z.zh...@linux.intel.com>
> Signed-off-by: Yang Weijiang <weijiang.y...@intel.com>
> ---
> target/i386/cpu.c | 26 +++++++++++++++++++++++++-
> 1 file changed, 25 insertions(+), 1 deletion(-)
>
> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> index 3630c688d6..cf4f2798dc 100644
> --- a/target/i386/cpu.c
> +++ b/target/i386/cpu.c
> @@ -1281,12 +1281,34 @@ static inline bool accel_uses_host_cpuid(void)
> return kvm_enabled() || hvf_enabled();
> }
>
> +static uint32_t xsave_area_size_compat(uint64_t mask)
Just curious, why “compat”?
> +{
> + int i;
> + uint64_t ret = 0;
> + uint32_t offset;
> +
> + for (i = 0; i < ARRAY_SIZE(x86_ext_save_areas); i++) {
> + const ExtSaveArea *esa = &x86_ext_save_areas[i];
> + offset = i > 1 ? ret : esa->offset;
What about a named constant instead of ‘1’?
(note that a loop around line 4657 starts at 2, so I guess it’s OK to use 1
here, or at least >= 2 ;-)
> + if ((mask >> i) & 1) {
> + ret = MAX(ret, offset + esa->size);
> + }
> + }
> + return ret;
> +}
> +
> static inline uint64_t x86_cpu_xsave_components(X86CPU *cpu)
> {
> return ((uint64_t)cpu->env.features[FEAT_XSAVE_COMP_HI]) << 32 |
> cpu->env.features[FEAT_XSAVE_COMP_LO];
> }
>
> +static inline uint64_t x86_cpu_xsave_sv_components(X86CPU *cpu)
> +{
> + return ((uint64_t)cpu->env.features[FEAT_XSAVE_SV_HI]) << 32 |
> + cpu->env.features[FEAT_XSAVE_SV_LO];
> +}
> +
> const char *get_register_name_32(unsigned int reg)
> {
> if (reg >= CPU_NB_REGS32) {
> @@ -4913,8 +4935,10 @@ static void x86_cpu_enable_xsave_components(X86CPU
> *cpu)
> }
> }
>
> - env->features[FEAT_XSAVE_COMP_LO] = mask;
> + env->features[FEAT_XSAVE_COMP_LO] = mask & CPUID_XSTATE_USER_MASK;
> env->features[FEAT_XSAVE_COMP_HI] = mask >> 32;
> + env->features[FEAT_XSAVE_SV_LO] = mask & CPUID_XSTATE_KERNEL_MASK;
> + env->features[FEAT_XSAVE_SV_HI] = mask >> 32;
> }
>
> /***** Steps involved on loading and filtering CPUID data
> --
> 2.17.1
>
