[Xen-changelog] [xen-unstable] nested vmx: fix handling of RDTSC

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
# Date 1354812981 0
# Node ID a09150b57ace2fa786dcaefa958f0b197b1b6d4c
# Parent  312f0713dfc98635fd9ed4b42481581489faa28f
nested vmx: fix handling of RDTSC

If L0 is to handle the TSC access, then we need to update guest EIP by
calling update_guest_eip().

Signed-off-by: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
Committed-by: Keir Fraser <keir@xxxxxxx>
---


diff -r 312f0713dfc9 -r a09150b57ace xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c        Thu Dec 06 16:54:26 2012 +0000
+++ b/xen/arch/x86/hvm/vmx/vmx.c        Thu Dec 06 16:56:21 2012 +0000
@@ -1555,7 +1555,7 @@ static int get_instruction_length(void)
     return len;
 }
 
-static void update_guest_eip(void)
+void update_guest_eip(void)
 {
     struct cpu_user_regs *regs = guest_cpu_user_regs();
     unsigned long x;
diff -r 312f0713dfc9 -r a09150b57ace xen/arch/x86/hvm/vmx/vvmx.c
--- a/xen/arch/x86/hvm/vmx/vvmx.c       Thu Dec 06 16:54:26 2012 +0000
+++ b/xen/arch/x86/hvm/vmx/vvmx.c       Thu Dec 06 16:56:21 2012 +0000
@@ -1614,6 +1614,7 @@ int nvmx_n2_vmexit_handler(struct cpu_us
             tsc += __get_vvmcs(nvcpu->nv_vvmcx, TSC_OFFSET);
             regs->eax = (uint32_t)tsc;
             regs->edx = (uint32_t)(tsc >> 32);
+            update_guest_eip();
 
             return 1;
         }
diff -r 312f0713dfc9 -r a09150b57ace xen/include/asm-x86/hvm/vmx/vmx.h
--- a/xen/include/asm-x86/hvm/vmx/vmx.h Thu Dec 06 16:54:26 2012 +0000
+++ b/xen/include/asm-x86/hvm/vmx/vmx.h Thu Dec 06 16:56:21 2012 +0000
@@ -399,6 +399,8 @@ void ept_p2m_init(struct p2m_domain *p2m
 void ept_walk_table(struct domain *d, unsigned long gfn);
 void setup_ept_dump(void);
 
+void update_guest_eip(void);
+
 /* EPT violation qualifications definitions */
 #define _EPT_READ_VIOLATION         0
 #define EPT_READ_VIOLATION          (1UL<<_EPT_READ_VIOLATION)

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