From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dongxiao Xu Subject: [PATCH v4 04/11] nested vmx: fix rflags status in virtual vmexit Date: Thu, 6 Dec 2012 21:01:04 +0800 Message-ID: <1354798871-5632-5-git-send-email-dongxiao.xu@intel.com> References: <1354798871-5632-1-git-send-email-dongxiao.xu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1354798871-5632-1-git-send-email-dongxiao.xu@intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: eddie.dong@intel.com, jun.nakajima@intel.com List-Id: xen-devel@lists.xenproject.org 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 Signed-off-by: Dongxiao Xu --- 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 ec5e8a7..d8b7ce5 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); + /* VM exit clears all bits except bit 1 */ + regs->eflags = 0x2; /* updating host cr0 to sync TS bit */ __vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0); -- 1.7.1