From: kaf24@localhost.localdomain <kaf24@localhost.localdomain>
Date: Sat, 19 Aug 2006 11:07:07 +0000 (+0100)
Subject: [HVM][VMX] Don't update the EIP on debug register accesses
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~15710^2~29
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=ef0e2fc8dc73fbfff716e560fdcf3dbe4a793669;p=xen.git

[HVM][VMX] Don't update the EIP on debug register accesses

On debug register accesses, the EIP should not be updated.
Because of the way that lazy save/restore of the debug
registers is implemented, this initial debug register access
is lost.

Signed-off-by: Travis Betak <travis.betak@amd.com>
---

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index acd61cfdc0..c0a1616c0a 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2273,8 +2273,6 @@ asmlinkage void vmx_vmexit_handler(struct cpu_user_regs regs)
     case EXIT_REASON_DR_ACCESS:
         __vmread(EXIT_QUALIFICATION, &exit_qualification);
         vmx_dr_access(exit_qualification, &regs);
-        __get_instruction_length(inst_len);
-        __update_guest_eip(inst_len);
         break;
     case EXIT_REASON_IO_INSTRUCTION:
         __vmread(EXIT_QUALIFICATION, &exit_qualification);