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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] amd xsave: Enable XSAVE/XRSTOR for SVM guest
# HG changeset patch
# User Keir Fraser <keir@xxxxxxx>
# Date 1291746460 0
# Node ID 066c924ed467c7931e22d597eefc7ca89d782611
# Parent 98eb4a334b7723c3e515038feaddbd01cec45a3a
amd xsave: Enable XSAVE/XRSTOR for SVM guest
This patch creates a common interface hanlding xsetbv.
Signed-off-by: Wei Huang <wei.huang2@xxxxxxx>
---
xen/arch/x86/hvm/hvm.c | 25 +++++++++++++++++++++++++
xen/arch/x86/hvm/svm/emulate.c | 2 ++
xen/arch/x86/hvm/svm/svm.c | 7 +++++++
xen/arch/x86/hvm/vmx/vmx.c | 26 +-------------------------
xen/include/asm-x86/hvm/support.h | 2 ++
xen/include/asm-x86/hvm/svm/emulate.h | 1 +
xen/include/asm-x86/hvm/svm/vmcb.h | 1 +
7 files changed, 39 insertions(+), 25 deletions(-)
diff -r 98eb4a334b77 -r 066c924ed467 xen/arch/x86/hvm/hvm.c
--- a/xen/arch/x86/hvm/hvm.c Tue Dec 07 18:26:38 2010 +0000
+++ b/xen/arch/x86/hvm/hvm.c Tue Dec 07 18:27:40 2010 +0000
@@ -1144,6 +1144,31 @@ bool_t hvm_hap_nested_page_fault(unsigne
return 0;
}
+int hvm_handle_xsetbv(u64 new_bv)
+{
+ struct vcpu *v = current;
+ struct segment_register sreg;
+
+ hvm_get_segment_register(v, x86_seg_ss, &sreg);
+ if ( sreg.attr.fields.dpl != 0 )
+ goto err;
+
+ if ( ((new_bv ^ xfeature_mask) & ~xfeature_mask) || !(new_bv & 1) )
+ goto err;
+
+ if ( (xfeature_mask & XSTATE_YMM & new_bv) && !(new_bv & XSTATE_SSE) )
+ goto err;
+
+ v->arch.xcr0 = new_bv;
+ v->arch.xcr0_accum |= new_bv;
+ set_xcr0(new_bv);
+
+ return 0;
+err:
+ hvm_inject_exception(TRAP_gp_fault, 0, 0);
+ return -1;
+}
+
int hvm_set_efer(uint64_t value)
{
struct vcpu *v = current;
diff -r 98eb4a334b77 -r 066c924ed467 xen/arch/x86/hvm/svm/emulate.c
--- a/xen/arch/x86/hvm/svm/emulate.c Tue Dec 07 18:26:38 2010 +0000
+++ b/xen/arch/x86/hvm/svm/emulate.c Tue Dec 07 18:27:40 2010 +0000
@@ -101,6 +101,7 @@ MAKE_INSTR(INT3, 1, 0xcc);
MAKE_INSTR(INT3, 1, 0xcc);
MAKE_INSTR(RDTSC, 2, 0x0f, 0x31);
MAKE_INSTR(PAUSE, 1, 0x90);
+MAKE_INSTR(XSETBV, 3, 0x0f, 0x01, 0xd1);
static const u8 *opc_bytes[INSTR_MAX_COUNT] =
{
@@ -114,6 +115,7 @@ static const u8 *opc_bytes[INSTR_MAX_COU
[INSTR_INT3] = OPCODE_INT3,
[INSTR_RDTSC] = OPCODE_RDTSC,
[INSTR_PAUSE] = OPCODE_PAUSE,
+ [INSTR_XSETBV] = OPCODE_XSETBV,
};
static int fetch(struct vcpu *v, u8 *buf, unsigned long addr, int len)
diff -r 98eb4a334b77 -r 066c924ed467 xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c Tue Dec 07 18:26:38 2010 +0000
+++ b/xen/arch/x86/hvm/svm/svm.c Tue Dec 07 18:27:40 2010 +0000
@@ -1600,6 +1600,13 @@ asmlinkage void svm_vmexit_handler(struc
hvm_inject_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE, 0);
break;
+ case VMEXIT_XSETBV:
+ if ( (inst_len = __get_instruction_length(current, INSTR_XSETBV))==0 )
+ break;
+ if ( hvm_handle_xsetbv((((u64)regs->edx) << 32) | regs->eax) == 0 )
+ __update_guest_eip(regs, inst_len);
+ break;
+
case VMEXIT_NPF:
perfc_incra(svmexits, VMEXIT_NPF_PERFC);
regs->error_code = vmcb->exitinfo1;
diff -r 98eb4a334b77 -r 066c924ed467 xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c Tue Dec 07 18:26:38 2010 +0000
+++ b/xen/arch/x86/hvm/vmx/vmx.c Tue Dec 07 18:27:40 2010 +0000
@@ -2194,30 +2194,6 @@ static int vmx_handle_eoi_write(void)
return 0;
}
-static int vmx_handle_xsetbv(u64 new_bv)
-{
- struct vcpu *v = current;
- struct segment_register sreg;
-
- hvm_get_segment_register(v, x86_seg_ss, &sreg);
- if ( sreg.attr.fields.dpl != 0 )
- goto err;
-
- if ( ((new_bv ^ xfeature_mask) & ~xfeature_mask) || !(new_bv & 1) )
- goto err;
-
- if ( (xfeature_mask & XSTATE_YMM & new_bv) && !(new_bv & XSTATE_SSE) )
- goto err;
-
- v->arch.xcr0 = new_bv;
- v->arch.xcr0_accum |= new_bv;
- set_xcr0(new_bv);
- return 0;
-err:
- vmx_inject_hw_exception(TRAP_gp_fault, 0);
- return -1;
-}
-
asmlinkage void vmx_vmexit_handler(struct cpu_user_regs *regs)
{
unsigned int exit_reason, idtv_info, intr_info = 0, vector = 0;
@@ -2610,7 +2586,7 @@ asmlinkage void vmx_vmexit_handler(struc
case EXIT_REASON_XSETBV:
{
u64 new_bv = (((u64)regs->edx) << 32) | regs->eax;
- if ( vmx_handle_xsetbv(new_bv) == 0 )
+ if ( hvm_handle_xsetbv(new_bv) == 0 )
update_guest_eip(); /* Safe: XSETBV */
break;
}
diff -r 98eb4a334b77 -r 066c924ed467 xen/include/asm-x86/hvm/support.h
--- a/xen/include/asm-x86/hvm/support.h Tue Dec 07 18:26:38 2010 +0000
+++ b/xen/include/asm-x86/hvm/support.h Tue Dec 07 18:27:40 2010 +0000
@@ -128,6 +128,8 @@ void hvm_triple_fault(void);
void hvm_rdtsc_intercept(struct cpu_user_regs *regs);
+int hvm_handle_xsetbv(u64 new_bv);
+
/* These functions all return X86EMUL return codes. */
int hvm_set_efer(uint64_t value);
int hvm_set_cr0(unsigned long value);
diff -r 98eb4a334b77 -r 066c924ed467 xen/include/asm-x86/hvm/svm/emulate.h
--- a/xen/include/asm-x86/hvm/svm/emulate.h Tue Dec 07 18:26:38 2010 +0000
+++ b/xen/include/asm-x86/hvm/svm/emulate.h Tue Dec 07 18:27:40 2010 +0000
@@ -32,6 +32,7 @@ enum instruction_index {
INSTR_INT3,
INSTR_RDTSC,
INSTR_PAUSE,
+ INSTR_XSETBV,
INSTR_MAX_COUNT /* Must be last - Number of instructions supported */
};
diff -r 98eb4a334b77 -r 066c924ed467 xen/include/asm-x86/hvm/svm/vmcb.h
--- a/xen/include/asm-x86/hvm/svm/vmcb.h Tue Dec 07 18:26:38 2010 +0000
+++ b/xen/include/asm-x86/hvm/svm/vmcb.h Tue Dec 07 18:27:40 2010 +0000
@@ -299,6 +299,7 @@ enum VMEXIT_EXITCODE
VMEXIT_MONITOR = 138, /* 0x8a */
VMEXIT_MWAIT = 139, /* 0x8b */
VMEXIT_MWAIT_CONDITIONAL= 140, /* 0x8c */
+ VMEXIT_XSETBV = 141, /* 0x8d */
VMEXIT_NPF = 1024, /* 0x400, nested paging fault */
VMEXIT_INVALID = -1
};
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