From 4a069acdbdc89bafca1da3c88830d97d5105c296 Mon Sep 17 00:00:00 2001 From: Dongxiao Xu Date: Thu, 6 Dec 2012 16:56:49 +0000 Subject: [PATCH] nested vmx: fix DR access VM exit 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 Acked-by: Jan Beulich Committed-by: Keir Fraser --- xen/arch/x86/hvm/vmx/vvmx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c index dab9551358..02a7052234 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: -- 2.30.2