From eb68feea83c9d299c82ef673dd73aa04265292db Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Mon, 30 Sep 2013 13:58:48 +0200 Subject: Nested VMX: Expose unrestricted guest feature to guest With virtual unrestricted guest feature, L2 guest is allowed to run with PG cleared. Also, allow PAE not set during virtual vmexit emulation. Signed-off-by: Yang Zhang Acked-by: Eddie.Dong@intel.com --- xen/arch/x86/hvm/hvm.c | 3 ++- xen/arch/x86/hvm/vmx/vvmx.c | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c index e0e0f5ddb5..150b0ec460 100644 --- a/xen/arch/x86/hvm/hvm.c +++ b/xen/arch/x86/hvm/hvm.c @@ -1732,7 +1732,8 @@ int hvm_set_cr0(unsigned long value) { if ( v->arch.hvm_vcpu.guest_efer & EFER_LME ) { - if ( !(v->arch.hvm_vcpu.guest_cr[4] & X86_CR4_PAE) ) + if ( !(v->arch.hvm_vcpu.guest_cr[4] & X86_CR4_PAE) && + !nestedhvm_vmswitch_in_progress(v) ) { HVM_DBG_LOG(DBG_LEVEL_1, "Enable paging before PAE enable"); goto gpf; diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c index ba617fa9d2..d476f03dcd 100644 --- a/xen/arch/x86/hvm/vmx/vvmx.c +++ b/xen/arch/x86/hvm/vmx/vvmx.c @@ -1342,6 +1342,7 @@ static void virtual_vmexit(struct cpu_user_regs *regs) nestedhvm_vcpu_exit_guestmode(v); nvcpu->nv_vmexit_pending = 0; + nvcpu->nv_vmswitch_in_progress = 1; lm_l2 = !!hvm_long_mode_enabled(v); lm_l1 = !!(__get_vvmcs(nvcpu->nv_vvmcx, VM_EXIT_CONTROLS) & @@ -1372,6 +1373,7 @@ static void virtual_vmexit(struct cpu_user_regs *regs) if ( cpu_has_vmx_virtual_intr_delivery ) nvmx_update_apicv(v); + nvcpu->nv_vmswitch_in_progress = 0; vmreturn(regs, VMSUCCEED); } @@ -1877,6 +1879,7 @@ int nvmx_msr_read_intercept(unsigned int msr, u64 *msr_content) data = SECONDARY_EXEC_DESCRIPTOR_TABLE_EXITING | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | SECONDARY_EXEC_ENABLE_VPID | + SECONDARY_EXEC_UNRESTRICTED_GUEST | SECONDARY_EXEC_ENABLE_EPT; data = gen_vmx_msr(data, 0, host_data); break; -- cgit v1.2.3