[libvirt] [PATCH qom-cpu 09/11] target-i386: check/enforce: Eliminate check_feat field

Eduardo Habkost
2013-01-04T22:01:10Z

Now that all entries have check_feat=~0 on
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>
---
Changes v2:
- Coding style fix
---
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 a9dd959..1c3c7e1 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -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;
@@ -956,8 +955,7 @@ 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.
*/
@@ -968,13 +966,13 @@ 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());
@@ -982,7 +980,7 @@ 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;
--
1.7.11.7