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| author | Rusty Russell <rusty@rustcorp.com.au> | 2007-07-30 21:13:43 +1000 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:21 +0200 |
| commit | b114b0804df7131cb6764b948c1c530c834fa3c0 (patch) | |
| tree | 4e5ced9ed1cdb673d27b26b166cd0bd7c845d5b9 /drivers/kvm/kvm.h | |
| parent | c16f862d0257349607b7a9be7b4a4b7ed419a3ab (diff) | |
| download | lwn-b114b0804df7131cb6764b948c1c530c834fa3c0.tar.gz lwn-b114b0804df7131cb6764b948c1c530c834fa3c0.zip | |
KVM: Use alignment properties of vcpu to simplify FPU ops
Now we use a kmem cache for allocating vcpus, we can get the 16-byte
alignment required by fxsave & fxrstor instructions, and avoid
manually aligning the buffer.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm.h')
| -rw-r--r-- | drivers/kvm/kvm.h | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index b362e8f8f832..7a34706f42be 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -45,10 +45,6 @@ #define KVM_REFILL_PAGES 25 #define KVM_MAX_CPUID_ENTRIES 40 -#define FX_IMAGE_SIZE 512 -#define FX_IMAGE_ALIGN 16 -#define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN) - #define DE_VECTOR 0 #define NM_VECTOR 7 #define DF_VECTOR 8 @@ -342,9 +338,8 @@ struct kvm_vcpu { struct kvm_guest_debug guest_debug; - char fx_buf[FX_BUF_SIZE]; - char *host_fx_image; - char *guest_fx_image; + struct i387_fxsave_struct host_fx_image; + struct i387_fxsave_struct guest_fx_image; int fpu_active; int guest_fpu_loaded; @@ -704,12 +699,12 @@ static inline unsigned long read_msr(unsigned long msr) } #endif -static inline void fx_save(void *image) +static inline void fx_save(struct i387_fxsave_struct *image) { asm ("fxsave (%0)":: "r" (image)); } -static inline void fx_restore(void *image) +static inline void fx_restore(struct i387_fxsave_struct *image) { asm ("fxrstor (%0)":: "r" (image)); } |