From ff48eb5fe79ad9ce50127965bd42320c7cccc8a1 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Tue, 1 Feb 2011 22:15:53 +0100 Subject: [PATCH] kvm: Set up signal mask also for !CONFIG_IOTHREAD Block SIG_IPI, unblock it during KVM_RUN, just like in io-thread mode. It's unused so far, but this infrastructure will be required for self-IPIs and to process SIGBUS plus, in KVM mode, SIGIO and SIGALRM. As Windows doesn't support signal services, we need to provide a stub for the init function. Signed-off-by: Jan Kiszka Signed-off-by: Marcelo Tosatti --- cpus.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/cpus.c b/cpus.c index 62120c450..f27dfbdda 100644 --- a/cpus.c +++ b/cpus.c @@ -223,11 +223,9 @@ fail: return err; } -#ifdef CONFIG_IOTHREAD static void dummy_signal(int sig) { } -#endif #else /* _WIN32 */ @@ -259,6 +257,32 @@ static void qemu_event_increment(void) #endif /* _WIN32 */ #ifndef CONFIG_IOTHREAD +static void qemu_kvm_init_cpu_signals(CPUState *env) +{ +#ifndef _WIN32 + int r; + sigset_t set; + struct sigaction sigact; + + memset(&sigact, 0, sizeof(sigact)); + sigact.sa_handler = dummy_signal; + sigaction(SIG_IPI, &sigact, NULL); + + sigemptyset(&set); + sigaddset(&set, SIG_IPI); + pthread_sigmask(SIG_BLOCK, &set, NULL); + + pthread_sigmask(SIG_BLOCK, NULL, &set); + sigdelset(&set, SIG_IPI); + sigdelset(&set, SIGBUS); + r = kvm_set_signal_mask(env, &set); + if (r) { + fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); + exit(1); + } +#endif +} + int qemu_init_main_loop(void) { cpu_set_debug_excp_handler(cpu_debug_handler); @@ -284,6 +308,7 @@ void qemu_init_vcpu(void *_env) fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r)); exit(1); } + qemu_kvm_init_cpu_signals(env); } } -- 2.39.2