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From ce8b0103a1c5cae9030156d9f17daf5dee5ed4c5 Mon Sep 17 00:00:00 2001
From: Eduardo Habkost <ehabkost@redhat.com>
Date: Thu, 23 Feb 2017 14:29:35 +0100
Subject: [PATCH 05/17] target-i386: kvm_cpu_fill_host(): No need to check CPU
 vendor

RH-Author: Eduardo Habkost <ehabkost@redhat.com>
Message-id: <20170223142945.17790-5-ehabkost@redhat.com>
Patchwork-id: 74043
O-Subject: [RHEL-7.4 qemu-kvm PATCH v2 04/14] target-i386: kvm_cpu_fill_host(): No need to check CPU vendor
Bugzilla: 1382122
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>

There's no need to check CPU vendor before calling
kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX), because:

 * The kernel won't return any entry for 0xC0000000 if host CPU vendor
   is not Centaur (See kvm_dev_ioctl_get_cpuid() on the kernel code);
 * kvm_arch_get_supported_cpuid() will return 0 if no entry is returned
   by the kernel for the requested leaf.

This will simplify the kvm_cpu_fill_host() code a little.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit b73dcfb16fc894041de553ac9f98b9e1640fcf06)
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 target-i386/cpu.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index c82073e..a10055b 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1285,14 +1285,12 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
     cpu_x86_fill_model_id(x86_cpu_def->model_id);
 
     /* Call Centaur's CPUID instruction. */
-    if (!strcmp(x86_cpu_def->vendor, CPUID_VENDOR_VIA)) {
-        eax = kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX);
-        if (eax >= 0xC0000001) {
-            /* Support VIA max extended level */
-            x86_cpu_def->xlevel2 = eax;
-            x86_cpu_def->features[FEAT_C000_0001_EDX] =
-                    kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
-        }
+    eax = kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX);
+    if (eax >= 0xC0000001) {
+        /* Support VIA max extended level */
+        x86_cpu_def->xlevel2 = eax;
+        x86_cpu_def->features[FEAT_C000_0001_EDX] =
+                kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
     }
 
     /* Other KVM-specific feature fields: */
-- 
1.8.3.1