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| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-09-25 18:33:53 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-09-25 19:22:33 +0200 |
| commit | fd3edd4a9066f28de99a16685a586d68a9f551f8 (patch) | |
| tree | 295565b14056307d08674bdcc0db9b1b0d8ace92 /arch | |
| parent | cab01850277a827c57270bba48be1d8fe312643d (diff) | |
| download | linux-fd3edd4a9066f28de99a16685a586d68a9f551f8.tar.bz2 | |
KVM: nVMX: cleanup and fix host 64-bit mode checks
KVM was incorrectly checking vmcs12->host_ia32_efer even if the "load
IA32_EFER" exit control was reset. Also, some checks were not using
the new CC macro for tracing.
Cleanup everything so that the vCPU's 64-bit mode is determined
directly from EFER_LMA and the VMCS checks are based on that, which
matches section 26.2.4 of the SDM.
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Fixes: 5845038c111db27902bc220a4f70070fe945871c
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 50 |
1 files changed, 19 insertions, 31 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 70d59d9304f2..41abc62c9a8a 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2664,8 +2664,23 @@ static int nested_vmx_check_host_state(struct kvm_vcpu *vcpu, CC(!kvm_pat_valid(vmcs12->host_ia32_pat))) return -EINVAL; - ia32e = (vmcs12->vm_exit_controls & - VM_EXIT_HOST_ADDR_SPACE_SIZE) != 0; +#ifdef CONFIG_X86_64 + ia32e = !!(vcpu->arch.efer & EFER_LMA); +#else + ia32e = false; +#endif + + if (ia32e) { + if (CC(!(vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE)) || + CC(!(vmcs12->host_cr4 & X86_CR4_PAE))) + return -EINVAL; + } else { + if (CC(vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) || + CC(vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) || + CC(vmcs12->host_cr4 & X86_CR4_PCIDE) || + CC((vmcs12->host_rip) >> 32)) + return -EINVAL; + } if (CC(vmcs12->host_cs_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) || CC(vmcs12->host_ss_selector & (SEGMENT_RPL_MASK | SEGMENT_TI_MASK)) || @@ -2684,35 +2699,8 @@ static int nested_vmx_check_host_state(struct kvm_vcpu *vcpu, CC(is_noncanonical_address(vmcs12->host_gs_base, vcpu)) || CC(is_noncanonical_address(vmcs12->host_gdtr_base, vcpu)) || CC(is_noncanonical_address(vmcs12->host_idtr_base, vcpu)) || - CC(is_noncanonical_address(vmcs12->host_tr_base, vcpu))) - return -EINVAL; - - if (!(vmcs12->host_ia32_efer & EFER_LMA) && - ((vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) || - (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE))) { - return -EINVAL; - } - - if ((vmcs12->host_ia32_efer & EFER_LMA) && - !(vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE)) { - return -EINVAL; - } - - if (!(vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) && - ((vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) || - (vmcs12->host_cr4 & X86_CR4_PCIDE) || - (((vmcs12->host_rip) >> 32) & 0xffffffff))) { - return -EINVAL; - } - - if ((vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) && - ((!(vmcs12->host_cr4 & X86_CR4_PAE)) || - (is_noncanonical_address(vmcs12->host_rip, vcpu)))) { - return -EINVAL; - } -#else - if (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE || - vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) + CC(is_noncanonical_address(vmcs12->host_tr_base, vcpu)) || + CC(is_noncanonical_address(vmcs12->host_rip, vcpu))) return -EINVAL; #endif |