qemu-kvm/kvm-target-i386-add-CPUID.24-features-for-AVX10.patch

From cfb4964556facf1cb4500f0e3a754e4e20c13aed Mon Sep 17 00:00:00 2001
From: Tao Su <tao1.su@linux.intel.com>
Date: Thu, 31 Oct 2024 16:52:30 +0800
Subject: [PATCH 34/38] target/i386: add CPUID.24 features for AVX10

RH-Author: Paolo Bonzini <pbonzini@redhat.com>
RH-MergeRequest: 280: Add support for the AVX10.1, SHA512, SM3 and SM4 instruction sets
RH-Jira: RHEL-30315 RHEL-45110
RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [5/9] a8b6f9edc330b412fbd27eece2f4961f4f876e5b (bonzini/rhel-qemu-kvm)

Introduce features for the supported vector bit lengths.

Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Link: https://lore.kernel.org/r/20241028024512.156724-3-tao1.su@linux.intel.com
Link: https://lore.kernel.org/r/20241028024512.156724-4-tao1.su@linux.intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Tested-by: Xuelian Guo <xuelian.guo@intel.com>
Link: https://lore.kernel.org/r/20241031085233.425388-6-tao1.su@linux.intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 2d055b8fe11ee567c2ae8047311fd83697e494b6)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/cpu.c | 15 +++++++++++++++
 target/i386/cpu.h |  8 ++++++++
 2 files changed, 23 insertions(+)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index a2e1a18537..958cbff54d 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -902,6 +902,7 @@ void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
 #define TCG_SGX_12_0_EAX_FEATURES 0
 #define TCG_SGX_12_0_EBX_FEATURES 0
 #define TCG_SGX_12_1_EAX_FEATURES 0
+#define TCG_24_0_EBX_FEATURES 0
 
 #if defined CONFIG_USER_ONLY
 #define CPUID_8000_0008_EBX_KERNEL_FEATURES (CPUID_8000_0008_EBX_IBPB | \
@@ -1167,6 +1168,20 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
         },
         .tcg_features = TCG_7_2_EDX_FEATURES,
     },
+    [FEAT_24_0_EBX] = {
+        .type = CPUID_FEATURE_WORD,
+        .feat_names = {
+            [16] = "avx10-128",
+            [17] = "avx10-256",
+            [18] = "avx10-512",
+        },
+        .cpuid = {
+            .eax = 0x24,
+            .needs_ecx = true, .ecx = 0,
+            .reg = R_EBX,
+        },
+        .tcg_features = TCG_24_0_EBX_FEATURES,
+    },
     [FEAT_8000_0007_EDX] = {
         .type = CPUID_FEATURE_WORD,
         .feat_names = {
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 591113349d..c60290b8d5 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -666,6 +666,7 @@ typedef enum FeatureWord {
     FEAT_XSAVE_XSS_HI,     /* CPUID[EAX=0xd,ECX=1].EDX */
     FEAT_7_1_EDX,       /* CPUID[EAX=7,ECX=1].EDX */
     FEAT_7_2_EDX,       /* CPUID[EAX=7,ECX=2].EDX */
+    FEAT_24_0_EBX,      /* CPUID[EAX=0x24,ECX=0].EBX */
     FEATURE_WORDS,
 } FeatureWord;
 
@@ -990,6 +991,13 @@ uint64_t x86_cpu_get_supported_feature_word(X86CPU *cpu, FeatureWord w);
 /* Packets which contain IP payload have LIP values */
 #define CPUID_14_0_ECX_LIP              (1U << 31)
 
+/* AVX10 128-bit vector support is present */
+#define CPUID_24_0_EBX_AVX10_128        (1U << 16)
+/* AVX10 256-bit vector support is present */
+#define CPUID_24_0_EBX_AVX10_256        (1U << 17)
+/* AVX10 512-bit vector support is present */
+#define CPUID_24_0_EBX_AVX10_512        (1U << 18)
+
 /* RAS Features */
 #define CPUID_8000_0007_EBX_OVERFLOW_RECOV    (1U << 0)
 #define CPUID_8000_0007_EBX_SUCCOR      (1U << 1)
-- 
2.39.3