Revision 7ba1e619 target-i386/helper.c
| b/target-i386/helper.c | ||
|---|---|---|
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#include "exec-all.h" |
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#include "svm.h" |
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#include "qemu-common.h" |
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#include "kvm.h" |
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|
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//#define DEBUG_MMU |
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|
| ... | ... | |
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#ifdef USE_KQEMU |
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kqemu_init(env); |
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#endif |
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if (kvm_enabled()) |
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kvm_init_vcpu(env); |
|
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return env; |
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} |
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|
| ... | ... | |
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} |
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#endif /* !CONFIG_USER_ONLY */ |
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#if defined(CONFIG_KVM) |
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static void host_cpuid(uint32_t function, uint32_t *eax, uint32_t *ebx, |
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uint32_t *ecx, uint32_t *edx) |
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{
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uint32_t vec[4]; |
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|
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#ifdef __x86_64__ |
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asm volatile("cpuid"
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: "=a"(vec[0]), "=b"(vec[1]), |
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"=c"(vec[2]), "=d"(vec[3]) |
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: "0"(function) : "cc"); |
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#else |
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asm volatile("pusha \n\t"
|
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"cpuid \n\t" |
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"mov %%eax, 0(%1) \n\t" |
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"mov %%ebx, 4(%1) \n\t" |
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"mov %%ecx, 8(%1) \n\t" |
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"mov %%edx, 12(%1) \n\t" |
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"popa" |
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: : "a"(function), "S"(vec) |
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: "memory", "cc"); |
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#endif |
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|
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if (eax) |
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*eax = vec[0]; |
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if (ebx) |
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*ebx = vec[1]; |
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if (ecx) |
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*ecx = vec[2]; |
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if (edx) |
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*edx = vec[3]; |
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} |
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#endif |
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|
|
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void cpu_x86_cpuid(CPUX86State *env, uint32_t index, |
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uint32_t *eax, uint32_t *ebx, |
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uint32_t *ecx, uint32_t *edx) |
| ... | ... | |
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*ebx = env->cpuid_vendor1; |
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*edx = env->cpuid_vendor2; |
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*ecx = env->cpuid_vendor3; |
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|
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/* sysenter isn't supported on compatibility mode on AMD. and syscall |
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* isn't supported in compatibility mode on Intel. so advertise the |
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* actuall cpu, and say goodbye to migration between different vendors |
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* is you use compatibility mode. */ |
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if (kvm_enabled()) |
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host_cpuid(0, NULL, ebx, ecx, edx); |
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break; |
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case 1: |
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*eax = env->cpuid_version; |
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*ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */ |
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*ecx = env->cpuid_ext_features; |
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*edx = env->cpuid_features; |
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|
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/* "Hypervisor present" bit required for Microsoft SVVP */ |
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if (kvm_enabled()) |
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*ecx |= (1 << 31); |
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break; |
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case 2: |
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/* cache info: needed for Pentium Pro compatibility */ |
| ... | ... | |
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*ebx = 0; |
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*ecx = env->cpuid_ext3_features; |
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*edx = env->cpuid_ext2_features; |
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|
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if (kvm_enabled()) {
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uint32_t h_eax, h_edx; |
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|
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host_cpuid(0x80000001, &h_eax, NULL, NULL, &h_edx); |
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|
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/* disable CPU features that the host does not support */ |
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|
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/* long mode */ |
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if ((h_edx & 0x20000000) == 0 /* || !lm_capable_kernel */) |
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*edx &= ~0x20000000; |
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/* syscall */ |
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if ((h_edx & 0x00000800) == 0) |
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*edx &= ~0x00000800; |
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/* nx */ |
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if ((h_edx & 0x00100000) == 0) |
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*edx &= ~0x00100000; |
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|
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/* disable CPU features that KVM cannot support */ |
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|
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/* svm */ |
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*ecx &= ~4UL; |
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/* 3dnow */ |
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*edx = ~0xc0000000; |
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} |
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break; |
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case 0x80000002: |
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case 0x80000003: |
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