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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-12-14 07:49:54 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-09 08:17:07 -0500 |
| commit | 996ff5429e9898947016206ee9da387a93d63d9d (patch) | |
| tree | 93efdb570615ef46730baa52dd8bf6c1e3466c16 /arch/x86/kvm/vmx/vmx.c | |
| parent | 29d6ca41992a771e2441424099695c329d735c28 (diff) | |
| download | linux-996ff5429e9898947016206ee9da387a93d63d9d.tar.bz2 | |
KVM: x86: move kvm_inject_gp up from kvm_set_dr to callers
Push the injection of #GP up to the callers, so that they can just use
kvm_complete_insn_gp. __kvm_set_dr is pretty much what the callers can use
together with kvm_complete_insn_gp, so rename it to kvm_set_dr and drop
the old kvm_set_dr wrapper.
This also allows nested VMX code, which really wanted to use __kvm_set_dr,
to use the right function.
While at it, remove the kvm_require_dr() check from the SVM interception.
The APM states:
All normal exception checks take precedence over the SVM intercepts.
which includes the CR4.DE=1 #UD.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 049fbbd0aa1a..13898871e5b0 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -5095,6 +5095,7 @@ static int handle_dr(struct kvm_vcpu *vcpu) { unsigned long exit_qualification; int dr, dr7, reg; + int err = 1; exit_qualification = vmx_get_exit_qual(vcpu); dr = exit_qualification & DEBUG_REG_ACCESS_NUM; @@ -5103,9 +5104,9 @@ static int handle_dr(struct kvm_vcpu *vcpu) if (!kvm_require_dr(vcpu, dr)) return 1; - /* Do not handle if the CPL > 0, will trigger GP on re-entry */ - if (!kvm_require_cpl(vcpu, 0)) - return 1; + if (kvm_x86_ops.get_cpl(vcpu) > 0) + goto out; + dr7 = vmcs_readl(GUEST_DR7); if (dr7 & DR7_GD) { /* @@ -5144,11 +5145,13 @@ static int handle_dr(struct kvm_vcpu *vcpu) kvm_get_dr(vcpu, dr, &val); kvm_register_write(vcpu, reg, val); - } else - if (kvm_set_dr(vcpu, dr, kvm_register_readl(vcpu, reg))) - return 1; + err = 0; + } else { + err = kvm_set_dr(vcpu, dr, kvm_register_readl(vcpu, reg)); + } - return kvm_skip_emulated_instruction(vcpu); +out: + return kvm_complete_insn_gp(vcpu, err); } static void vmx_sync_dirty_debug_regs(struct kvm_vcpu *vcpu) |