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x86/cpuid: remove unnecessary kvm_trim function 

Correct me if I am wrong, but kvm_trim looks like a really bloated
implementation of a bitwise AND. So remove this function and replace
it with the real stuff(TM).

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Andre Przywara 2010-03-11 14:39:01 +01:00 committed by Aurelien Jarno
parent ed2c54d4cc
commit 457dfed614
1 changed files with 6 additions and 21 deletions
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27
target-i386/kvm.c
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@ -133,19 +133,6 @@ uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function, int reg)
#endif
static void kvm_trim_features(uint32_t *features, uint32_t supported)
{
int i;
uint32_t mask;
for (i = 0; i < 32; ++i) {
mask = 1U << i;
if ((*features & mask) && !(supported & mask)) {
*features &= ~mask;
}
}
}
#ifdef CONFIG_KVM_PARA
struct kvm_para_features {
int cap;
@ -191,18 +178,16 @@ int kvm_arch_init_vcpu(CPUState *env)
env->mp_state = KVM_MP_STATE_RUNNABLE;
kvm_trim_features(&env->cpuid_features,
kvm_arch_get_supported_cpuid(env, 1, R_EDX));
env->cpuid_features &= kvm_arch_get_supported_cpuid(env, 1, R_EDX);
i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR;
kvm_trim_features(&env->cpuid_ext_features,
kvm_arch_get_supported_cpuid(env, 1, R_ECX));
env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(env, 1, R_ECX);
env->cpuid_ext_features |= i;
kvm_trim_features(&env->cpuid_ext2_features,
kvm_arch_get_supported_cpuid(env, 0x80000001, R_EDX));
kvm_trim_features(&env->cpuid_ext3_features,
kvm_arch_get_supported_cpuid(env, 0x80000001, R_ECX));
env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(env, 0x80000001,
R_EDX);
env->cpuid_ext3_features &= kvm_arch_get_supported_cpuid(env, 0x80000001,
R_ECX);
cpuid_i = 0;