Il 04/06/2013 18:02, Bandan Das ha scritto:
> Make vendor_intel generic so that functions in x86.c
> can use it.
>
> v2:
> Change vendor_intel function signature because the emulator
> shouldn't be dealing with struct vcpu
>
> Signed-off-by: Bandan Das <bsd@xxxxxxxxxx>
> ---
> arch/x86/include/asm/kvm_emulate.h | 13 -------------
> arch/x86/include/asm/kvm_host.h | 20 ++++++++++++++++++++
> arch/x86/kvm/emulate.c | 16 ++++------------
> 3 files changed, 24 insertions(+), 25 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h
> index 15f960c..611a55f 100644
> --- a/arch/x86/include/asm/kvm_emulate.h
> +++ b/arch/x86/include/asm/kvm_emulate.h
> @@ -319,19 +319,6 @@ struct x86_emulate_ctxt {
> #define REPE_PREFIX 0xf3
> #define REPNE_PREFIX 0xf2
>
> -/* CPUID vendors */
> -#define X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx 0x68747541
> -#define X86EMUL_CPUID_VENDOR_AuthenticAMD_ecx 0x444d4163
> -#define X86EMUL_CPUID_VENDOR_AuthenticAMD_edx 0x69746e65
> -
> -#define X86EMUL_CPUID_VENDOR_AMDisbetterI_ebx 0x69444d41
> -#define X86EMUL_CPUID_VENDOR_AMDisbetterI_ecx 0x21726574
> -#define X86EMUL_CPUID_VENDOR_AMDisbetterI_edx 0x74656273
> -
> -#define X86EMUL_CPUID_VENDOR_GenuineIntel_ebx 0x756e6547
> -#define X86EMUL_CPUID_VENDOR_GenuineIntel_ecx 0x6c65746e
> -#define X86EMUL_CPUID_VENDOR_GenuineIntel_edx 0x49656e69
> -
> enum x86_intercept_stage {
> X86_ICTP_NONE = 0, /* Allow zero-init to not match anything */
> X86_ICPT_PRE_EXCEPT,
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 3741c65..ce9a44f 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -144,6 +144,19 @@ enum {
>
> #include <asm/kvm_emulate.h>
>
> +/* CPUID vendors */
> +#define X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx 0x68747541
> +#define X86EMUL_CPUID_VENDOR_AuthenticAMD_ecx 0x444d4163
> +#define X86EMUL_CPUID_VENDOR_AuthenticAMD_edx 0x69746e65
> +
> +#define X86EMUL_CPUID_VENDOR_AMDisbetterI_ebx 0x69444d41
> +#define X86EMUL_CPUID_VENDOR_AMDisbetterI_ecx 0x21726574
> +#define X86EMUL_CPUID_VENDOR_AMDisbetterI_edx 0x74656273
> +
> +#define X86EMUL_CPUID_VENDOR_GenuineIntel_ebx 0x756e6547
> +#define X86EMUL_CPUID_VENDOR_GenuineIntel_ecx 0x6c65746e
> +#define X86EMUL_CPUID_VENDOR_GenuineIntel_edx 0x49656e69
> +
> #define KVM_NR_MEM_OBJS 40
>
> #define KVM_NR_DB_REGS 4
> @@ -942,6 +955,13 @@ static inline unsigned long read_msr(unsigned long msr)
> }
> #endif
>
> +static inline bool vendor_intel(u32 ebx, u32 ecx, u32 edx)
> +{
> + return ebx == X86EMUL_CPUID_VENDOR_GenuineIntel_ebx
> + && ecx == X86EMUL_CPUID_VENDOR_GenuineIntel_ecx
> + && edx == X86EMUL_CPUID_VENDOR_GenuineIntel_edx;
> +}
> +
> static inline u32 get_rdx_init_val(void)
> {
> return 0x600; /* P6 family */
> diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
> index 8db0010..87f12fc 100644
> --- a/arch/x86/kvm/emulate.c
> +++ b/arch/x86/kvm/emulate.c
> @@ -2280,17 +2280,6 @@ setup_syscalls_segments(struct x86_emulate_ctxt *ctxt,
> ss->avl = 0;
> }
>
> -static bool vendor_intel(struct x86_emulate_ctxt *ctxt)
> -{
> - u32 eax, ebx, ecx, edx;
> -
> - eax = ecx = 0;
> - ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx);
> - return ebx == X86EMUL_CPUID_VENDOR_GenuineIntel_ebx
> - && ecx == X86EMUL_CPUID_VENDOR_GenuineIntel_ecx
> - && edx == X86EMUL_CPUID_VENDOR_GenuineIntel_edx;
> -}
> -
> static bool em_syscall_is_enabled(struct x86_emulate_ctxt *ctxt)
> {
> const struct x86_emulate_ops *ops = ctxt->ops;
> @@ -2400,6 +2389,7 @@ static int em_sysenter(struct x86_emulate_ctxt *ctxt)
> u64 msr_data;
> u16 cs_sel, ss_sel;
> u64 efer = 0;
> + u32 eax, ebx, ecx, edx;
>
> ops->get_msr(ctxt, MSR_EFER, &efer);
> /* inject #GP if in real mode */
> @@ -2410,8 +2400,10 @@ static int em_sysenter(struct x86_emulate_ctxt *ctxt)
> * Not recognized on AMD in compat mode (but is recognized in legacy
> * mode).
> */
> + eax = ecx = 0;
> + ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx);
> if ((ctxt->mode == X86EMUL_MODE_PROT32) && (efer & EFER_LMA)
> - && !vendor_intel(ctxt))
> + && !vendor_intel(ebx, ecx, edx))
> return emulate_ud(ctxt);
>
> /* XXX sysenter/sysexit have not been tested in 64bit mode.
>
Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
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