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Subject[Qemu-devel][PATCH 4/4] Report CPUID xsave area support for CET.
Date
CPUID bit definition as below:
CPUID.(EAX=d, ECX=1):ECX.CET_U(bit 11): user mode state
CPUID.(EAX=d, ECX=1):ECX.CET_S(bit 12): kernel mode state

Signed-off-by: Zhang Yi <yi.z.zhang@linux.intel.com>
Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
---
target/i386/cpu.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index cf4f2798dc..78994bfa1d 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -4396,12 +4396,22 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
*ebx = xsave_area_size(env->xcr0);
} else if (count == 1) {
*eax = env->features[FEAT_XSAVE];
+ *ecx = env->features[FEAT_XSAVE_SV_LO];
+ *edx = env->features[FEAT_XSAVE_SV_HI];
+ *ebx = xsave_area_size_compat(x86_cpu_xsave_components(cpu) |
+ x86_cpu_xsave_sv_components(cpu));
} else if (count < ARRAY_SIZE(x86_ext_save_areas)) {
if ((x86_cpu_xsave_components(cpu) >> count) & 1) {
const ExtSaveArea *esa = &x86_ext_save_areas[count];
*eax = esa->size;
*ebx = esa->offset;
}
+ if ((x86_cpu_xsave_sv_components(cpu) >> count) & 1) {
+ const ExtSaveArea *esa_sv = &x86_ext_save_areas[count];
+ *eax = esa_sv->size;
+ *ebx = esa_sv->offset;
+ *ecx = 1;
+ }
}
break;
}
--
2.17.1
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