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[PATCH v18 1/7] Wrapper function to wait on condition for the main loop
From: |
Ganesh Goudar |
Subject: |
[PATCH v18 1/7] Wrapper function to wait on condition for the main loop mutex |
Date: |
Thu, 2 Jan 2020 13:21:05 +0530 |
From: Aravinda Prasad <address@hidden>
Introduce a wrapper function to wait on condition for
the main loop mutex. This function atomically releases
the main loop mutex and causes the calling thread to
block on the condition. This wrapper is required because
qemu_global_mutex is a static variable.
Signed-off-by: Aravinda Prasad <address@hidden>
Reviewed-by: David Gibson <address@hidden>
Reviewed-by: Greg Kurz <address@hidden>
---
cpus.c | 5 +++++
include/qemu/main-loop.h | 8 ++++++++
2 files changed, 13 insertions(+)
diff --git a/cpus.c b/cpus.c
index b472378b70..79388d2b0f 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1835,6 +1835,11 @@ void qemu_mutex_unlock_iothread(void)
qemu_mutex_unlock(&qemu_global_mutex);
}
+void qemu_cond_wait_iothread(QemuCond *cond)
+{
+ qemu_cond_wait(cond, &qemu_global_mutex);
+}
+
static bool all_vcpus_paused(void)
{
CPUState *cpu;
diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
index f6ba78ea73..a6d20b0719 100644
--- a/include/qemu/main-loop.h
+++ b/include/qemu/main-loop.h
@@ -295,6 +295,14 @@ void qemu_mutex_lock_iothread_impl(const char *file, int
line);
*/
void qemu_mutex_unlock_iothread(void);
+/*
+ * qemu_cond_wait_iothread: Wait on condition for the main loop mutex
+ *
+ * This function atomically releases the main loop mutex and causes
+ * the calling thread to block on the condition.
+ */
+void qemu_cond_wait_iothread(QemuCond *cond);
+
/* internal interfaces */
void qemu_fd_register(int fd);
--
2.17.2
- [PATCH v18 0/7] target-ppc/spapr: Add FWNMI support in QEMU for PowerKM guests, Ganesh Goudar, 2020/01/02
- [PATCH v18 1/7] Wrapper function to wait on condition for the main loop mutex,
Ganesh Goudar <=
- [PATCH v18 2/7] ppc: spapr: Introduce FWNMI capability, Ganesh Goudar, 2020/01/02
- [PATCH v18 3/7] target/ppc: Handle NMI guest exit, Ganesh Goudar, 2020/01/02
- [PATCH v18 4/7] target/ppc: Build rtas error log upon an MCE, Ganesh Goudar, 2020/01/02
- [PATCH v18 5/7] ppc: spapr: Handle "ibm, nmi-register" and "ibm, nmi-interlock" RTAS calls, Ganesh Goudar, 2020/01/02