[Xen-devel] [PATCH v2 4/4] x86emul: Support vaes insns

[Yang Zhong <yang.zhong@xxxxxxxxx>]

The previous aes insns only support legacy and AVX128.
Icelake added AVX256 support.

Signed-off-by: Yang Zhong <yang.zhong@xxxxxxxxx>
---
 xen/arch/x86/x86_emulate/x86_emulate.c | 7 +++++++
 xen/include/asm-x86/cpufeature.h       | 1 +
 2 files changed, 8 insertions(+)

diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c 
b/xen/arch/x86/x86_emulate/x86_emulate.c
index 559b387..97cdf03 100644
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -1626,6 +1626,7 @@ static bool vcpu_has(
 #define vcpu_has_clwb()        vcpu_has(         7, EBX, 24, ctxt, ops)
 #define vcpu_has_sha()         vcpu_has(         7, EBX, 29, ctxt, ops)
 #define vcpu_has_gfni()        vcpu_has(         7, ECX,  8, ctxt, ops)
+#define vcpu_has_vaes()        vcpu_has(         7, ECX,  9, ctxt, ops)
 #define vcpu_has_vpclmulqdq()  vcpu_has(         7, ECX, 10, ctxt, ops)
 #define vcpu_has_rdpid()       vcpu_has(         7, ECX, 22, ctxt, ops)
 #define vcpu_has_clzero()      vcpu_has(0x80000008, EBX,  0, ctxt, ops)
@@ -7345,6 +7346,12 @@ x86_emulate(
         host_and_vcpu_must_have(aesni);
         if ( vex.opcx == vex_none )
             goto simd_0f38_common;
+        if ( vex.l )
+        {
+            host_and_vcpu_must_have(vaes);
+            goto simd_0f_avx;
+        }
+
         /* fall through */
     case X86EMUL_OPC_VEX_66(0x0f38, 0x41): /* vphminposuw xmm/m128,xmm,xmm */
         generate_exception_if(vex.l, EXC_UD);
diff --git a/xen/include/asm-x86/cpufeature.h b/xen/include/asm-x86/cpufeature.h
index 3f24f06..ffa110e 100644
--- a/xen/include/asm-x86/cpufeature.h
+++ b/xen/include/asm-x86/cpufeature.h
@@ -99,6 +99,7 @@
 
 /* CPUID level 0x00000007:0.ecx */
 #define cpu_has_gfni            boot_cpu_has(X86_FEATURE_GFNI)
+#define cpu_has_vaes            boot_cpu_has(X86_FEATURE_VAES)
 #define cpu_has_vpclmulqdq      boot_cpu_has(X86_FEATURE_VPCLMULQDQ)
 
 /* CPUID level 0x80000007.edx */
-- 
1.9.1


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