From 21feb4eb64e21f8dc91136b91ee886b978ce6421 Mon Sep 17 00:00:00 2001 From: Arthur Chunqi Li Date: Mon, 15 Jul 2013 16:04:08 +0800 Subject: KVM: nVMX: Set segment infomation of L1 when L2 exits When L2 exits to L1, segment infomations of L1 are not set correctly. According to Intel SDM 27.5.2(Loading Host Segment and Descriptor Table Registers), segment base/limit/access right of L1 should be set to some designed value when L2 exits to L1. This patch fixes this. Signed-off-by: Arthur Chunqi Li Reviewed-by: Gleb Natapov Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 58 ++++++++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 48 insertions(+), 10 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e37b2a33fd24..e999dc7662d8 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7969,6 +7969,8 @@ static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) { + struct kvm_segment seg; + if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) vcpu->arch.efer = vmcs12->host_ia32_efer; else if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) @@ -8022,16 +8024,6 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->host_ia32_sysenter_eip); vmcs_writel(GUEST_IDTR_BASE, vmcs12->host_idtr_base); vmcs_writel(GUEST_GDTR_BASE, vmcs12->host_gdtr_base); - vmcs_writel(GUEST_TR_BASE, vmcs12->host_tr_base); - vmcs_writel(GUEST_GS_BASE, vmcs12->host_gs_base); - vmcs_writel(GUEST_FS_BASE, vmcs12->host_fs_base); - vmcs_write16(GUEST_ES_SELECTOR, vmcs12->host_es_selector); - vmcs_write16(GUEST_CS_SELECTOR, vmcs12->host_cs_selector); - vmcs_write16(GUEST_SS_SELECTOR, vmcs12->host_ss_selector); - vmcs_write16(GUEST_DS_SELECTOR, vmcs12->host_ds_selector); - vmcs_write16(GUEST_FS_SELECTOR, vmcs12->host_fs_selector); - vmcs_write16(GUEST_GS_SELECTOR, vmcs12->host_gs_selector); - vmcs_write16(GUEST_TR_SELECTOR, vmcs12->host_tr_selector); if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT) vmcs_write64(GUEST_IA32_PAT, vmcs12->host_ia32_pat); @@ -8039,6 +8031,52 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL, vmcs12->host_ia32_perf_global_ctrl); + /* Set L1 segment info according to Intel SDM + 27.5.2 Loading Host Segment and Descriptor-Table Registers */ + seg = (struct kvm_segment) { + .base = 0, + .limit = 0xFFFFFFFF, + .selector = vmcs12->host_cs_selector, + .type = 11, + .present = 1, + .s = 1, + .g = 1 + }; + if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) + seg.l = 1; + else + seg.db = 1; + vmx_set_segment(vcpu, &seg, VCPU_SREG_CS); + seg = (struct kvm_segment) { + .base = 0, + .limit = 0xFFFFFFFF, + .type = 3, + .present = 1, + .s = 1, + .db = 1, + .g = 1 + }; + seg.selector = vmcs12->host_ds_selector; + vmx_set_segment(vcpu, &seg, VCPU_SREG_DS); + seg.selector = vmcs12->host_es_selector; + vmx_set_segment(vcpu, &seg, VCPU_SREG_ES); + seg.selector = vmcs12->host_ss_selector; + vmx_set_segment(vcpu, &seg, VCPU_SREG_SS); + seg.selector = vmcs12->host_fs_selector; + seg.base = vmcs12->host_fs_base; + vmx_set_segment(vcpu, &seg, VCPU_SREG_FS); + seg.selector = vmcs12->host_gs_selector; + seg.base = vmcs12->host_gs_base; + vmx_set_segment(vcpu, &seg, VCPU_SREG_GS); + seg = (struct kvm_segment) { + .base = 0, + .limit = 0x67, + .selector = vmcs12->host_tr_selector, + .type = 11, + .present = 1 + }; + vmx_set_segment(vcpu, &seg, VCPU_SREG_TR); + kvm_set_dr(vcpu, 7, 0x400); vmcs_write64(GUEST_IA32_DEBUGCTL, 0); } -- cgit v1.2.3