diff options
| author | Joerg Roedel | 2010-02-19 16:23:02 +0100 |
|---|---|---|
| committer | Avi Kivity | 2010-04-25 11:34:10 +0200 |
| commit | b8e88bc8ffba5fe53fb8d8a0a4be3bbcffeebe56 (patch) | |
| tree | 609785cf43eabd9308a1435fb5ffd50f77f6a5fd /arch/x86/kvm/svm.c | |
| parent | KVM: SVM: Don't use kmap_atomic in nested_svm_map (diff) | |
| download | kernel-qcow2-linux-b8e88bc8ffba5fe53fb8d8a0a4be3bbcffeebe56.tar.gz kernel-qcow2-linux-b8e88bc8ffba5fe53fb8d8a0a4be3bbcffeebe56.tar.xz kernel-qcow2-linux-b8e88bc8ffba5fe53fb8d8a0a4be3bbcffeebe56.zip | |
KVM: SVM: Fix schedule-while-atomic on nested exception handling
Move the actual vmexit routine out of code that runs with
irqs and preemption disabled.
Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index f9da35b06ec7..c27da0ad040c 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -129,6 +129,7 @@ static void svm_flush_tlb(struct kvm_vcpu *vcpu); static void svm_complete_interrupts(struct vcpu_svm *svm); static int nested_svm_exit_handled(struct vcpu_svm *svm); +static int nested_svm_intercept(struct vcpu_svm *svm); static int nested_svm_vmexit(struct vcpu_svm *svm); static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, bool has_error_code, u32 error_code); @@ -1384,6 +1385,8 @@ static int nested_svm_check_permissions(struct vcpu_svm *svm) static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, bool has_error_code, u32 error_code) { + int vmexit; + if (!is_nested(svm)) return 0; @@ -1392,7 +1395,11 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, svm->vmcb->control.exit_info_1 = error_code; svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2; - return nested_svm_exit_handled(svm); + vmexit = nested_svm_intercept(svm); + if (vmexit == NESTED_EXIT_DONE) + svm->nested.exit_required = true; + + return vmexit; } static inline int nested_svm_intr(struct vcpu_svm *svm) @@ -1521,7 +1528,7 @@ static int nested_svm_exit_special(struct vcpu_svm *svm) /* * If this function returns true, this #vmexit was already handled */ -static int nested_svm_exit_handled(struct vcpu_svm *svm) +static int nested_svm_intercept(struct vcpu_svm *svm) { u32 exit_code = svm->vmcb->control.exit_code; int vmexit = NESTED_EXIT_HOST; @@ -1567,9 +1574,17 @@ static int nested_svm_exit_handled(struct vcpu_svm *svm) } } - if (vmexit == NESTED_EXIT_DONE) { + return vmexit; +} + +static int nested_svm_exit_handled(struct vcpu_svm *svm) +{ + int vmexit; + + vmexit = nested_svm_intercept(svm); + + if (vmexit == NESTED_EXIT_DONE) nested_svm_vmexit(svm); - } return vmexit; } |