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[Qemu-devel] [PATCH 12/23] kvm: Set up signal mask also for !CONFIG_IOTH
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH 12/23] kvm: Set up signal mask also for !CONFIG_IOTHREAD |
Date: |
Fri, 4 Feb 2011 13:47:15 -0200 |
From: Jan Kiszka <address@hidden>
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 <address@hidden>
Signed-off-by: Marcelo Tosatti <address@hidden>
---
cpus.c | 29 +++++++++++++++++++++++++++--
1 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/cpus.c b/cpus.c
index 42717ba..a33e470 100644
--- a/cpus.c
+++ b/cpus.c
@@ -231,11 +231,9 @@ fail:
return err;
}
-#ifdef CONFIG_IOTHREAD
static void dummy_signal(int sig)
{
}
-#endif
#else /* _WIN32 */
@@ -267,6 +265,32 @@ 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);
@@ -292,6 +316,7 @@ void qemu_init_vcpu(void *_env)
fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
exit(1);
}
+ qemu_kvm_init_cpu_signals(env);
}
}
--
1.7.2.3
- [Qemu-devel] [PATCH 22/23] x86: Fix MCA broadcast parameters for TCG case, (continued)
- [Qemu-devel] [PATCH 22/23] x86: Fix MCA broadcast parameters for TCG case, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 08/23] kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fn, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 16/23] kvm: Fix race between timer signals and vcpu entry under !IOTHREAD, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 02/23] Stop current VCPU on synchronous reset requests, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 05/23] Leave inner main_loop faster on pending requests, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 20/23] kvm: Remove static return code of kvm_handle_io, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 10/23] kvm: Provide sigbus services arch-independently, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 15/23] Set up signalfd under !CONFIG_IOTHREAD, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 12/23] kvm: Set up signal mask also for !CONFIG_IOTHREAD,
Marcelo Tosatti <=
- [Qemu-devel] [PATCH 06/23] Flatten the main loop, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 01/23] Prevent abortion on multiple VCPU kicks, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 04/23] Trigger exit from cpu_exec_all on pending IO events, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 14/23] kvm: Call qemu_kvm_eat_signals also under !CONFIG_IOTHREAD, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 09/23] kvm: Handle kvm_init_vcpu errors, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 03/23] Process vmstop requests in IO thread, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 11/23] Refactor signal setup functions in cpus.c, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 17/23] kvm: Add MCE signal support for !CONFIG_IOTHREAD, Marcelo Tosatti, 2011/02/04
- Re: [Qemu-devel] [PATCH 00/23] [PULL] qemu-kvm.git uq/master queue, Anthony Liguori, 2011/02/04