diff options
author | Jan H. Schönherr <jschoenh@amazon.de> | 2017-11-24 22:39:01 +0100 |
---|---|---|
committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-11-27 17:53:47 +0100 |
commit | 20b7035c66bacc909ae3ffe92c1a1ea7db99fe4f (patch) | |
tree | 1d3ba8ee0b1f0caf975b1ce323be02e3c7682752 /arch/powerpc/kvm/powerpc.c | |
parent | b74558259c5149e5edd79348b70eb34177cbeea0 (diff) | |
download | linux-20b7035c66bacc909ae3ffe92c1a1ea7db99fe4f.tar.bz2 |
KVM: Let KVM_SET_SIGNAL_MASK work as advertised
KVM API says for the signal mask you set via KVM_SET_SIGNAL_MASK, that
"any unblocked signal received [...] will cause KVM_RUN to return with
-EINTR" and that "the signal will only be delivered if not blocked by
the original signal mask".
This, however, is only true, when the calling task has a signal handler
registered for a signal. If not, signal evaluation is short-circuited for
SIG_IGN and SIG_DFL, and the signal is either ignored without KVM_RUN
returning or the whole process is terminated.
Make KVM_SET_SIGNAL_MASK behave as advertised by utilizing logic similar
to that in do_sigtimedwait() to avoid short-circuiting of signals.
Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm/powerpc.c')
-rw-r--r-- | arch/powerpc/kvm/powerpc.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 6b6c53c42ac9..1915e86cef6f 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -1407,7 +1407,6 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) { int r; - sigset_t sigsaved; if (vcpu->mmio_needed) { vcpu->mmio_needed = 0; @@ -1448,16 +1447,14 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) #endif } - if (vcpu->sigset_active) - sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); + kvm_sigset_activate(vcpu); if (run->immediate_exit) r = -EINTR; else r = kvmppc_vcpu_run(run, vcpu); - if (vcpu->sigset_active) - sigprocmask(SIG_SETMASK, &sigsaved, NULL); + kvm_sigset_deactivate(vcpu); return r; } |