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bitkeeper revision 1.1736 (42ba85d8Vh1WXA4F1eQpFRpsTyq1xg)
[PATCH] sysenter-msr.patch Handle MSR reads/writes to sysenter related MSRs. Signed-off-by: Xiaofeng Ling <xiaofeng.ling@intel.com> Signed-off-by: Chengyuan Li <chengyuan.li@intel.com> Signed-off-by: Arun Sharma <arun.sharma@intel.com>
This commit is contained in:
arun.sharma@intel.com[kaf24] committed
1 parent
18dc46379c
commit
d79fbdeea9
1 file changed
+43
-5
+43
-5
@@ -1009,8 +1009,23 @@ static inline void vmx_do_msr_read(struct cpu_user_regs *regs)
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VMX_DBG_LOG(DBG_LEVEL_1, "vmx_do_msr_read: ecx=%lx, eax=%lx, edx=%lx",
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(unsigned long)regs->ecx, (unsigned long)regs->eax,
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(unsigned long)regs->edx);
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rdmsr(regs->ecx, regs->eax, regs->edx);
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switch (regs->ecx) {
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case MSR_IA32_SYSENTER_CS:
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__vmread(GUEST_SYSENTER_CS, ®s->eax);
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regs->edx = 0;
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break;
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case MSR_IA32_SYSENTER_ESP:
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__vmread(GUEST_SYSENTER_ESP, ®s->eax);
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regs->edx = 0;
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break;
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case MSR_IA32_SYSENTER_EIP:
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__vmread(GUEST_SYSENTER_EIP, ®s->eax);
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regs->edx = 0;
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break;
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default:
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rdmsr(regs->ecx, regs->eax, regs->edx);
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break;
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}
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VMX_DBG_LOG(DBG_LEVEL_1, "vmx_do_msr_read returns: "
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"ecx=%lx, eax=%lx, edx=%lx",
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@@ -1018,6 +1033,31 @@ static inline void vmx_do_msr_read(struct cpu_user_regs *regs)
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(unsigned long)regs->edx);
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}
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static inline void vmx_do_msr_write(struct cpu_user_regs *regs)
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{
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VMX_DBG_LOG(DBG_LEVEL_1, "vmx_do_msr_write: ecx=%lx, eax=%lx, edx=%lx",
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(unsigned long)regs->ecx, (unsigned long)regs->eax,
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(unsigned long)regs->edx);
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switch (regs->ecx) {
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case MSR_IA32_SYSENTER_CS:
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__vmwrite(GUEST_SYSENTER_CS, regs->eax);
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break;
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case MSR_IA32_SYSENTER_ESP:
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__vmwrite(GUEST_SYSENTER_ESP, regs->eax);
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break;
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case MSR_IA32_SYSENTER_EIP:
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__vmwrite(GUEST_SYSENTER_EIP, regs->eax);
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break;
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default:
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break;
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}
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VMX_DBG_LOG(DBG_LEVEL_1, "vmx_do_msr_write returns: "
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"ecx=%lx, eax=%lx, edx=%lx",
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(unsigned long)regs->ecx, (unsigned long)regs->eax,
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(unsigned long)regs->edx);
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}
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/*
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* Need to use this exit to reschedule
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*/
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@@ -1332,9 +1372,7 @@ asmlinkage void vmx_vmexit_handler(struct cpu_user_regs regs)
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break;
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case EXIT_REASON_MSR_WRITE:
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__vmread(GUEST_RIP, &eip);
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VMX_DBG_LOG(DBG_LEVEL_1, "MSR_WRITE: eip=%lx, eax=%lx, edx=%lx",
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eip, (unsigned long)regs.eax, (unsigned long)regs.edx);
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/* just ignore this point */
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vmx_do_msr_write(®s);
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__get_instruction_length(inst_len);
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__update_guest_eip(inst_len);
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break;
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