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author | Jan H. Schönherr <jschoenh@amazon.de> | 2017-11-25 00:39:01 +0300 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-11-27 19:53:47 +0300 |
commit | 20b7035c66bacc909ae3ffe92c1a1ea7db99fe4f (patch) | |
tree | 1d3ba8ee0b1f0caf975b1ce323be02e3c7682752 /include | |
parent | b74558259c5149e5edd79348b70eb34177cbeea0 (diff) | |
download | linux-20b7035c66bacc909ae3ffe92c1a1ea7db99fe4f.tar.xz |
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 'include')
-rw-r--r-- | include/linux/kvm_host.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 2e754b7c282c..893d6d606cd0 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -715,6 +715,9 @@ int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data, unsigned long len); void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn); +void kvm_sigset_activate(struct kvm_vcpu *vcpu); +void kvm_sigset_deactivate(struct kvm_vcpu *vcpu); + void kvm_vcpu_block(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu); |