[PATCH v4 07/23] i386/cpu: Use x86_ext_save_areas[] for CPUID.0XD subleaves

[Zhao Liu <zhao1.liu@intel.com>]

The x86_ext_save_areas[] is expected to be well initialized by
accelerators and its xstate detail information cannot be changed by
user. So use x86_ext_save_areas[] to encode CPUID.0XD subleaves directly
without other hardcoding & masking.

And for arch LBR case, since its entry in x86_ext_save_areas[] has been
initialized based KVM support in kvm_cpu_xsave_init(), so use
x86_ext_save_areas[] for encoding.

Tested-by: Farrah Chen <farrah.chen@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
Changes Since v3:
 - New commit.
---
 target/i386/cpu.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 70a282668f72..f3bf7f892214 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -8188,20 +8188,17 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
             }
         } else if (count == 0xf && cpu->enable_pmu
                    && (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_ARCH_LBR)) {
-            x86_cpu_get_supported_cpuid(0xD, count, eax, ebx, ecx, edx);
+            const ExtSaveArea *esa = &x86_ext_save_areas[count];
+
+            *eax = esa->size;
+            *ebx = esa->offset;
+            *ecx = esa->ecx;
         } else if (count < ARRAY_SIZE(x86_ext_save_areas)) {
             const ExtSaveArea *esa = &x86_ext_save_areas[count];
 
-            if (x86_cpu_xsave_xcr0_components(cpu) & (1ULL << count)) {
-                *eax = esa->size;
-                *ebx = esa->offset;
-                *ecx = esa->ecx &
-                       (ESA_FEATURE_ALIGN64_MASK | ESA_FEATURE_XFD_MASK);
-            } else if (x86_cpu_xsave_xss_components(cpu) & (1ULL << count)) {
-                *eax = esa->size;
-                *ebx = 0;
-                *ecx = 1;
-            }
+            *eax = esa->size;
+            *ebx = esa->offset;
+            *ecx = esa->ecx;
         }
         break;
     }
-- 
2.34.1