From: Christoph Egger <Christoph.Egger@amd.com>
Date: Thu, 12 May 2011 08:00:46 +0000 (+0100)
Subject: nestedsvm: update rip on invlpga intercept
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~10366
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success//%22http:/www.example.com/cgi/success/?a=commitdiff_plain;h=2fcfd3c495a01732f0e9a29f20c4436e38810fc6;p=xen.git

nestedsvm: update rip on invlpga intercept

Fixes endless loop.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
---

diff --git a/xen/arch/x86/hvm/svm/emulate.c b/xen/arch/x86/hvm/svm/emulate.c
index 16f9c2b92f..6000bffd53 100644
--- a/xen/arch/x86/hvm/svm/emulate.c
+++ b/xen/arch/x86/hvm/svm/emulate.c
@@ -107,6 +107,7 @@ MAKE_INSTR(VMLOAD, 3, 0x0f, 0x01, 0xda);
 MAKE_INSTR(VMSAVE, 3, 0x0f, 0x01, 0xdb);
 MAKE_INSTR(STGI,   3, 0x0f, 0x01, 0xdc);
 MAKE_INSTR(CLGI,   3, 0x0f, 0x01, 0xdd);
+MAKE_INSTR(INVLPGA,3, 0x0f, 0x01, 0xdf);
 
 static const u8 *opc_bytes[INSTR_MAX_COUNT] = 
 {
@@ -126,6 +127,7 @@ static const u8 *opc_bytes[INSTR_MAX_COUNT] =
     [INSTR_VMSAVE] = OPCODE_VMSAVE,
     [INSTR_STGI]   = OPCODE_STGI,
     [INSTR_CLGI]   = OPCODE_CLGI,
+    [INSTR_INVLPGA] = OPCODE_INVLPGA,
 };
 
 static int fetch(struct vcpu *v, u8 *buf, unsigned long addr, int len)
diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index f5591f779c..b342897812 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -2061,7 +2061,10 @@ asmlinkage void svm_vmexit_handler(struct cpu_user_regs *regs)
         break;
 
     case VMEXIT_INVLPGA:
+        if ( (inst_len = __get_instruction_length(v, INSTR_INVLPGA)) == 0 )
+            break;
         svm_invlpga_intercept(v, regs->eax, regs->ecx);
+        __update_guest_eip(regs, inst_len);
         break;
 
     case VMEXIT_VMMCALL:
diff --git a/xen/include/asm-x86/hvm/svm/emulate.h b/xen/include/asm-x86/hvm/svm/emulate.h
index 78e9dd0a68..7d2677fa07 100644
--- a/xen/include/asm-x86/hvm/svm/emulate.h
+++ b/xen/include/asm-x86/hvm/svm/emulate.h
@@ -38,6 +38,7 @@ enum instruction_index {
     INSTR_VMSAVE,
     INSTR_STGI,
     INSTR_CLGI,
+    INSTR_INVLPGA,
     INSTR_MAX_COUNT /* Must be last - Number of instructions supported */
 };