diff options
| author | Gleb Natapov | 2010-02-10 13:21:33 +0100 |
|---|---|---|
| committer | Marcelo Tosatti | 2010-03-01 16:36:11 +0100 |
| commit | f850e2e603bf5a05b0aee7901857cf85715aa694 (patch) | |
| tree | d3c841530a11187bbe70b36bf4b9bca97bf7dd64 /arch/x86/kvm/x86.c | |
| parent | KVM: x86 emulator: fix memory access during x86 emulation (diff) | |
| download | kernel-qcow2-linux-f850e2e603bf5a05b0aee7901857cf85715aa694.tar.gz kernel-qcow2-linux-f850e2e603bf5a05b0aee7901857cf85715aa694.tar.xz kernel-qcow2-linux-f850e2e603bf5a05b0aee7901857cf85715aa694.zip | |
KVM: x86 emulator: Check IOPL level during io instruction emulation
Make emulator check that vcpu is allowed to execute IN, INS, OUT,
OUTS, CLI, STI.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index ea3a8af8a478..86b739f8f173 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3599,6 +3599,8 @@ int kvm_emulate_pio(struct kvm_vcpu *vcpu, int in, int size, unsigned port) { unsigned long val; + trace_kvm_pio(!in, port, size, 1); + vcpu->run->exit_reason = KVM_EXIT_IO; vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; vcpu->run->io.size = vcpu->arch.pio.size = size; @@ -3610,9 +3612,6 @@ int kvm_emulate_pio(struct kvm_vcpu *vcpu, int in, int size, unsigned port) vcpu->arch.pio.down = 0; vcpu->arch.pio.rep = 0; - trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port, - size, 1); - if (!vcpu->arch.pio.in) { val = kvm_register_read(vcpu, VCPU_REGS_RAX); memcpy(vcpu->arch.pio_data, &val, 4); @@ -3633,6 +3632,8 @@ int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, int in, unsigned now, in_page; int ret = 0; + trace_kvm_pio(!in, port, size, count); + vcpu->run->exit_reason = KVM_EXIT_IO; vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; vcpu->run->io.size = vcpu->arch.pio.size = size; @@ -3644,9 +3645,6 @@ int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, int in, vcpu->arch.pio.down = down; vcpu->arch.pio.rep = rep; - trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port, - size, count); - if (!count) { kvm_x86_ops->skip_emulated_instruction(vcpu); return 1; |