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

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(a)redhat.com&gt;

--- 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