From 380d7f27fe47ba1bc6e08b51b2ca8a7dbd8c1d06 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Sat, 6 Jun 2009 01:03:29 +0200 Subject: [PATCH] allow CPUID vendor override KVM-enabled QEMU will always report the vendor ID of the physical CPU it is running on. Allow to override this if explicitly requested on the command line. It will not suffice to name a CPU type (like -cpu phenom), but you have to explicitly set the vendor: -cpu phenom,vendor=AuthenticAMD Signed-off-by: Andre Przywara Signed-off-by: Anthony Liguori --- target-i386/cpu.h | 1 + target-i386/helper.c | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/target-i386/cpu.h b/target-i386/cpu.h index d7b32d4..3cd391a 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -655,6 +655,7 @@ typedef struct CPUX86State { uint32_t cpuid_ext2_features; uint32_t cpuid_ext3_features; uint32_t cpuid_apic_id; + int cpuid_vendor_override; /* MTRRs */ uint64_t mtrr_fixed[11]; diff --git a/target-i386/helper.c b/target-i386/helper.c index 7fc5366..b7b101b 100644 --- a/target-i386/helper.c +++ b/target-i386/helper.c @@ -116,6 +116,7 @@ typedef struct x86_def_t { uint32_t features, ext_features, ext2_features, ext3_features; uint32_t xlevel; char model_id[48]; + int vendor_override; } x86_def_t; #define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE) @@ -376,6 +377,7 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model) x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i); x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i); } + x86_cpu_def->vendor_override = 1; } else if (!strcmp(featurestr, "model_id")) { pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id), val); @@ -428,6 +430,7 @@ static int cpu_x86_register (CPUX86State *env, const char *cpu_model) env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2; env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3; } + env->cpuid_vendor_override = def->vendor_override; env->cpuid_level = def->level; if (def->family > 0x0f) env->cpuid_version = 0xf00 | ((def->family - 0x0f) << 20); @@ -1506,7 +1509,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, * isn't supported in compatibility mode on Intel. so advertise the * actuall cpu, and say goodbye to migration between different vendors * is you use compatibility mode. */ - if (kvm_enabled()) + if (kvm_enabled() && !env->cpuid_vendor_override) host_cpuid(0, 0, NULL, ebx, ecx, edx); break; case 1: -- 2.7.4