Replace the one ad hoc "AuthenticAMD" CPUID vendor string comparison
with a new function, is_amd_cpu().
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
---
.../selftests/kvm/include/x86_64/processor.h | 1 +
.../selftests/kvm/lib/x86_64/processor.c | 18 +++++++++---------
2 files changed, 10 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 05e65ca1c30c..69eaf9a69bb7 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -347,6 +347,7 @@ static inline unsigned long get_xmm(int n)
}
bool is_intel_cpu(void);
+bool is_amd_cpu(void);
struct kvm_x86_state;
struct kvm_x86_state *vcpu_save_state(struct kvm_vm *vm, uint32_t vcpuid);
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 355a3f6f1970..b969e38bc02e 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1218,6 +1218,14 @@ bool is_intel_cpu(void)
return cpu_vendor_string_is("GenuineIntel");
}
+/*
+ * Exclude early K5 samples with a vendor string of "AMDisbetter!"
+ */
+bool is_amd_cpu(void)
+{
+ return cpu_vendor_string_is("AuthenticAMD");
+}
+
uint32_t kvm_get_cpuid_max_basic(void)
{
return kvm_get_supported_cpuid_entry(0)->eax;
@@ -1436,10 +1444,6 @@ struct kvm_cpuid2 *vcpu_get_supported_hv_cpuid(struct kvm_vm *vm, uint32_t vcpui
return cpuid;
}
-#define X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx 0x68747541
-#define X86EMUL_CPUID_VENDOR_AuthenticAMD_ecx 0x444d4163
-#define X86EMUL_CPUID_VENDOR_AuthenticAMD_edx 0x69746e65
-
static inline unsigned x86_family(unsigned int eax)
{
unsigned int x86;
@@ -1461,11 +1465,7 @@ unsigned long vm_compute_max_gfn(struct kvm_vm *vm)
max_gfn = (1ULL << (vm->pa_bits - vm->page_shift)) - 1;
/* Avoid reserved HyperTransport region on AMD processors. */
- eax = ecx = 0;
- cpuid(&eax, &ebx, &ecx, &edx);
- if (ebx != X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx ||
- ecx != X86EMUL_CPUID_VENDOR_AuthenticAMD_ecx ||
- edx != X86EMUL_CPUID_VENDOR_AuthenticAMD_edx)
+ if (!is_amd_cpu())
return max_gfn;
/* On parts with <40 physical address bits, the area is fully hidden */
--
2.34.1.703.g22d0c6ccf7-goog
