Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d075206073286dca84768137af0a0bf3d11f0663
Commit: d075206073286dca84768137af0a0bf3d11f0663
Parent: 8776e5194f7bb847906e3561c4dba12ed66ebfb6
Author: Hollis Blanchard <[EMAIL PROTECTED]>
AuthorDate: Wed Oct 31 17:24:25 2007 -0500
Committer: Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 17:53:00 2008 +0200
KVM: Portability: Move x86 FPU handling to x86.c
Signed-off-by: Hollis Blanchard <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/kvm.h | 3 +
drivers/kvm/kvm_main.c | 107 +-----------------------------------------------
drivers/kvm/x86.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 108 insertions(+), 105 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index ef2a6a8..469ca42 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -633,6 +633,9 @@ long kvm_arch_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg);
void kvm_arch_destroy_vm(struct kvm *kvm);
+int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
+int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
+
__init void kvm_arch_init(void);
static inline void kvm_guest_enter(void)
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 57573eb..7230f48 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -73,28 +73,6 @@ static inline int valid_vcpu(int n)
return likely(n >= 0 && n < KVM_MAX_VCPUS);
}
-void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
-{
- if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
- return;
-
- vcpu->guest_fpu_loaded = 1;
- fx_save(&vcpu->host_fx_image);
- fx_restore(&vcpu->guest_fx_image);
-}
-EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
-
-void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
-{
- if (!vcpu->guest_fpu_loaded)
- return;
-
- vcpu->guest_fpu_loaded = 0;
- fx_save(&vcpu->guest_fx_image);
- fx_restore(&vcpu->host_fx_image);
-}
-EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
-
/*
* Switches to specified vcpu, until a matching vcpu_put()
*/
@@ -294,26 +272,6 @@ static int kvm_vm_release(struct inode *inode, struct file
*filp)
return 0;
}
-void fx_init(struct kvm_vcpu *vcpu)
-{
- unsigned after_mxcsr_mask;
-
- /* Initialize guest FPU by resetting ours and saving into guest's */
- preempt_disable();
- fx_save(&vcpu->host_fx_image);
- fpu_init();
- fx_save(&vcpu->guest_fx_image);
- fx_restore(&vcpu->host_fx_image);
- preempt_enable();
-
- vcpu->cr0 |= X86_CR0_ET;
- after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
- vcpu->guest_fx_image.mxcsr = 0x1f80;
- memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
- 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
-}
-EXPORT_SYMBOL_GPL(fx_init);
-
/*
* Allocate some memory and give it an address in the guest physical address
* space.
@@ -1422,67 +1380,6 @@ static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu
*vcpu, sigset_t *sigset)
return 0;
}
-/*
- * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
- * we have asm/x86/processor.h
- */
-struct fxsave {
- u16 cwd;
- u16 swd;
- u16 twd;
- u16 fop;
- u64 rip;
- u64 rdp;
- u32 mxcsr;
- u32 mxcsr_mask;
- u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
-#ifdef CONFIG_X86_64
- u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
-#else
- u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
-#endif
-};
-
-static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
-{
- struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
-
- vcpu_load(vcpu);
-
- memcpy(fpu->fpr, fxsave->st_space, 128);
- fpu->fcw = fxsave->cwd;
- fpu->fsw = fxsave->swd;
- fpu->ftwx = fxsave->twd;
- fpu->last_opcode = fxsave->fop;
- fpu->last_ip = fxsave->rip;
- fpu->last_dp = fxsave->rdp;
- memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
-{
- struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
-
- vcpu_load(vcpu);
-
- memcpy(fxsave->st_space, fpu->fpr, 128);
- fxsave->cwd = fpu->fcw;
- fxsave->swd = fpu->fsw;
- fxsave->twd = fpu->ftwx;
- fxsave->fop = fpu->last_opcode;
- fxsave->rip = fpu->last_ip;
- fxsave->rdp = fpu->last_dp;
- memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
static long kvm_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -1613,7 +1510,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
struct kvm_fpu fpu;
memset(&fpu, 0, sizeof fpu);
- r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
+ r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, &fpu);
if (r)
goto out;
r = -EFAULT;
@@ -1628,7 +1525,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&fpu, argp, sizeof fpu))
goto out;
- r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
+ r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, &fpu);
if (r)
goto out;
r = 0;
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index 2cf7eba..ef1661f 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -1785,3 +1785,106 @@ void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
kvm_x86_ops->skip_emulated_instruction(vcpu);
}
EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
+
+/*
+ * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
+ * we have asm/x86/processor.h
+ */
+struct fxsave {
+ u16 cwd;
+ u16 swd;
+ u16 twd;
+ u16 fop;
+ u64 rip;
+ u64 rdp;
+ u32 mxcsr;
+ u32 mxcsr_mask;
+ u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
+#ifdef CONFIG_X86_64
+ u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
+#else
+ u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
+#endif
+};
+
+int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
+{
+ struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
+
+ vcpu_load(vcpu);
+
+ memcpy(fpu->fpr, fxsave->st_space, 128);
+ fpu->fcw = fxsave->cwd;
+ fpu->fsw = fxsave->swd;
+ fpu->ftwx = fxsave->twd;
+ fpu->last_opcode = fxsave->fop;
+ fpu->last_ip = fxsave->rip;
+ fpu->last_dp = fxsave->rdp;
+ memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
+
+ vcpu_put(vcpu);
+
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
+{
+ struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
+
+ vcpu_load(vcpu);
+
+ memcpy(fxsave->st_space, fpu->fpr, 128);
+ fxsave->cwd = fpu->fcw;
+ fxsave->swd = fpu->fsw;
+ fxsave->twd = fpu->ftwx;
+ fxsave->fop = fpu->last_opcode;
+ fxsave->rip = fpu->last_ip;
+ fxsave->rdp = fpu->last_dp;
+ memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
+
+ vcpu_put(vcpu);
+
+ return 0;
+}
+
+void fx_init(struct kvm_vcpu *vcpu)
+{
+ unsigned after_mxcsr_mask;
+
+ /* Initialize guest FPU by resetting ours and saving into guest's */
+ preempt_disable();
+ fx_save(&vcpu->host_fx_image);
+ fpu_init();
+ fx_save(&vcpu->guest_fx_image);
+ fx_restore(&vcpu->host_fx_image);
+ preempt_enable();
+
+ vcpu->cr0 |= X86_CR0_ET;
+ after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
+ vcpu->guest_fx_image.mxcsr = 0x1f80;
+ memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
+ 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
+}
+EXPORT_SYMBOL_GPL(fx_init);
+
+void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
+{
+ if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
+ return;
+
+ vcpu->guest_fpu_loaded = 1;
+ fx_save(&vcpu->host_fx_image);
+ fx_restore(&vcpu->guest_fx_image);
+}
+EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
+
+void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
+{
+ if (!vcpu->guest_fpu_loaded)
+ return;
+
+ vcpu->guest_fpu_loaded = 0;
+ fx_save(&vcpu->guest_fx_image);
+ fx_restore(&vcpu->host_fx_image);
+}
+EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
-
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