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authorEduardo Habkost <ehabkost@redhat.com>2014-04-30 13:48:29 -0300
committerAndreas Färber <afaerber@suse.de>2014-06-25 18:04:15 +0200
commit857aee337c22dc6c56304146e938efacaf587e1c (patch)
tree8ddd935c337bf0823e479356a65e9672da898d4d /target-i386
parent136a7e9a85d7047461f8153f7d12c514a3d68f69 (diff)
target-i386: Simplify reporting of unavailable features
Instead of checking and calling unavailable_host_feature() once for each bit, simply call the function (now renamed to report_unavailable_features()) once for each feature word. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> [AF: Drop unused return value] Signed-off-by: Andreas Färber <afaerber@suse.de>
Diffstat (limited to 'target-i386')
-rw-r--r--target-i386/cpu.c17
1 files changed, 7 insertions, 10 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 23ce915f63..e848f9cf0c 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1234,11 +1234,11 @@ static const TypeInfo host_x86_cpu_type_info = {
#endif
-static int unavailable_host_feature(FeatureWordInfo *f, uint32_t mask)
+static void report_unavailable_features(FeatureWordInfo *f, uint32_t mask)
{
int i;
- for (i = 0; i < 32; ++i)
+ for (i = 0; i < 32; ++i) {
if (1 << i & mask) {
const char *reg = get_register_name_32(f->cpuid_reg);
assert(reg);
@@ -1247,9 +1247,8 @@ static int unavailable_host_feature(FeatureWordInfo *f, uint32_t mask)
f->cpuid_eax, reg,
f->feat_names[i] ? "." : "",
f->feat_names[i] ? f->feat_names[i] : "", i);
- break;
}
- return 0;
+ }
}
/* Check if all requested cpu flags are making their way to the guest
@@ -1272,12 +1271,10 @@ static int kvm_check_features_against_host(KVMState *s, X86CPU *cpu)
uint32_t host_feat = kvm_arch_get_supported_cpuid(s, wi->cpuid_eax,
wi->cpuid_ecx,
wi->cpuid_reg);
- uint32_t mask;
- for (mask = 1; mask; mask <<= 1) {
- if (guest_feat & mask && !(host_feat & mask)) {
- unavailable_host_feature(wi, mask);
- rv = 1;
- }
+ uint32_t unavailable_features = guest_feat & ~host_feat;
+ if (unavailable_features) {
+ report_unavailable_features(wi, unavailable_features);
+ rv = 1;
}
}
return rv;