From: Dongxiao Xu <dongxiao.xu@intel.com>
To: xen-devel@lists.xen.org
Cc: eddie.dong@intel.com, jun.nakajima@intel.com
Subject: [PATCH v4 06/11] nested vmx: fix DR access VM exit
Date: Thu, 6 Dec 2012 21:01:06 +0800 [thread overview]
Message-ID: <1354798871-5632-7-git-send-email-dongxiao.xu@intel.com> (raw)
In-Reply-To: <1354798871-5632-1-git-send-email-dongxiao.xu@intel.com>
For DR register, we use lazy restore mechanism when access it. Therefore
when receiving such VM exit, L0 should be responsible to switch to the
right DR values, then inject to L1 hypervisor.
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
---
xen/arch/x86/hvm/vmx/vvmx.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index dab9551..02a7052 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1641,7 +1641,8 @@ int nvmx_n2_vmexit_handler(struct cpu_user_regs *regs,
break;
case EXIT_REASON_DR_ACCESS:
ctrl = __n2_exec_control(v);
- if ( ctrl & CPU_BASED_MOV_DR_EXITING )
+ if ( (ctrl & CPU_BASED_MOV_DR_EXITING) &&
+ v->arch.hvm_vcpu.flag_dr_dirty )
nvcpu->nv_vmexit_pending = 1;
break;
case EXIT_REASON_INVLPG:
--
1.7.1
next prev parent reply other threads:[~2012-12-06 13:01 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-06 13:01 [PATCH v4 00/11] nested vmx: bug fixes and feature enabling Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 01/11] nested vmx: emulate MSR bitmaps Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 02/11] nested vmx: use literal name instead of hard numbers Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 03/11] nested vmx: expose bit 55 of IA32_VMX_BASIC_MSR to guest VMM Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 04/11] nested vmx: fix rflags status in virtual vmexit Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 05/11] nested vmx: fix handling of RDTSC Dongxiao Xu
2012-12-06 13:01 ` Dongxiao Xu [this message]
2012-12-06 13:01 ` [PATCH v4 07/11] nested vmx: enable IA32E mode while do VM entry Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 08/11] nested vmx: enable "Virtualize APIC accesses" feature for L1 VMM Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 09/11] nested vmx: enable PAUSE and RDPMC exiting " Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 10/11] nested vmx: fix interrupt delivery to L2 guest Dongxiao Xu
2012-12-06 13:01 ` [PATCH v4 11/11] nested vmx: check host ability when intercept MSR read Dongxiao Xu
2012-12-06 13:30 ` Jan Beulich
2012-12-06 13:31 ` [PATCH v4 00/11] nested vmx: bug fixes and feature enabling Jan Beulich
2012-12-06 14:29 ` Xu, Dongxiao
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