From: Dongxiao Xu <dongxiao.xu@intel.com>
To: xen-devel@lists.xen.org
Subject: [PATCH 03/10] nested vmx: fix rflags status in virtual vmexit
Date: Tue, 4 Dec 2012 13:53:23 +0800 [thread overview]
Message-ID: <1354600410-3390-4-git-send-email-dongxiao.xu@intel.com> (raw)
In-Reply-To: <1354600410-3390-1-git-send-email-dongxiao.xu@intel.com>
As stated in SDM, all bits (except for those 1-reserved) in rflags would
be set to 0 in VM exit. Therefore we need to follow this logic in
virtual_vmexit.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
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 cf91c7c..6a8caaa 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -991,7 +991,8 @@ static void virtual_vmexit(struct cpu_user_regs *regs)
regs->eip = __get_vvmcs(nvcpu->nv_vvmcx, HOST_RIP);
regs->esp = __get_vvmcs(nvcpu->nv_vvmcx, HOST_RSP);
- regs->eflags = __vmread(GUEST_RFLAGS);
+ /*VMexit clears all bits except bit 1!*/
+ regs->eflags = 2;
/* updating host cr0 to sync TS bit */
__vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0);
--
1.7.1
next prev parent reply other threads:[~2012-12-04 5:53 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-04 5:53 [PATCH 00/10] nested vmx: bug fixes and feature enabling Dongxiao Xu
2012-12-04 5:53 ` [PATCH 01/10] nested vmx: emulate MSR bitmaps Dongxiao Xu
2012-12-04 5:53 ` [PATCH 02/10] nested vmx: expose bit 55 of IA32_VMX_BASIC_MSR to guest VMM Dongxiao Xu
2012-12-04 9:59 ` Jan Beulich
2012-12-05 1:35 ` Xu, Dongxiao
2012-12-04 5:53 ` Dongxiao Xu [this message]
2012-12-04 5:53 ` [PATCH 04/10] nested vmx: fix handling of RDTSC Dongxiao Xu
2012-12-04 5:53 ` [PATCH 05/10] nested vmx: fix DR access VM exit Dongxiao Xu
2012-12-04 10:02 ` Jan Beulich
2012-12-05 1:27 ` Xu, Dongxiao
2012-12-04 5:53 ` [PATCH 06/10] nested vmx: enable IA32E mode while do VM entry Dongxiao Xu
2012-12-04 10:03 ` Jan Beulich
2012-12-05 1:26 ` Xu, Dongxiao
2012-12-04 5:53 ` [PATCH 07/10] nested vmx: enable "Virtualize APIC accesses" feature for L1 VMM Dongxiao Xu
2012-12-04 5:53 ` [PATCH 08/10] nested vmx: enable PAUSE and RDPMC exiting " Dongxiao Xu
2012-12-04 5:53 ` [PATCH 09/10] nested vmx: fix interrupt delivery to L2 guest Dongxiao Xu
2012-12-04 5:53 ` [PATCH 10/10] nested vmx: check host ability when intercept MSR read Dongxiao Xu
2012-12-04 10:05 ` [PATCH 00/10] nested vmx: bug fixes and feature enabling Jan Beulich
2012-12-05 1:37 ` Xu, Dongxiao
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