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target-i386: check/enforce: Eliminate check_feat field

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Now that all entries have check_feat=~0 in
kvm_check_features_against_host(), we can eliminate check_feat entirely
and make the code check all bits.

This patch shouldn't introduce any behavior change, as check_feat is set
to ~0 on all entries.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Eduardo Habkost 2013-01-04 20:01:10 -02:00 committed by Andreas Färber
parent 396d2cfccd
commit e8beac00bd
1 changed files with 6 additions and 8 deletions
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14
target-i386/cpu.c
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@ -148,7 +148,6 @@ const char *get_register_name_32(unsigned int reg)
typedef struct model_features_t {
uint32_t *guest_feat;
uint32_t *host_feat;
uint32_t check_feat;
const char **flag_names;
uint32_t cpuid;
int reg;
@ -945,8 +944,7 @@ static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
}
/* best effort attempt to inform user requested cpu flags aren't making
* their way to the guest. Note: ft[].check_feat ideally should be
* specified via a guest_def field to suppress report of extraneous flags.
* their way to the guest.
*
* This function may be called only if KVM is enabled.
*/
@ -957,13 +955,13 @@ static int kvm_check_features_against_host(x86_def_t *guest_def)
int rv, i;
struct model_features_t ft[] = {
{&guest_def->features, &host_def.features,
~0, feature_name, 0x00000001, R_EDX},
feature_name, 0x00000001, R_EDX},
{&guest_def->ext_features, &host_def.ext_features,
~0, ext_feature_name, 0x00000001, R_ECX},
ext_feature_name, 0x00000001, R_ECX},
{&guest_def->ext2_features, &host_def.ext2_features,
~0, ext2_feature_name, 0x80000001, R_EDX},
ext2_feature_name, 0x80000001, R_EDX},
{&guest_def->ext3_features, &host_def.ext3_features,
~0, ext3_feature_name, 0x80000001, R_ECX}
ext3_feature_name, 0x80000001, R_ECX}
};
assert(kvm_enabled());
@ -971,7 +969,7 @@ static int kvm_check_features_against_host(x86_def_t *guest_def)
kvm_cpu_fill_host(&host_def);
for (rv = 0, i = 0; i < ARRAY_SIZE(ft); ++i)
for (mask = 1; mask; mask <<= 1)
if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
if (*ft[i].guest_feat & mask &&
!(*ft[i].host_feat & mask)) {
unavailable_host_feature(&ft[i], mask);
rv = 1;