The name "iothread" is overloaded. Use the term Big QEMU Lock (BQL)
instead, it is already widely used and unambiguous.
Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
Reviewed-by: Paul Durrant <paul@xxxxxxx>
Acked-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Reviewed-by: Cédric Le Goater <clg@xxxxxxxx>
Acked-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
Reviewed-by: Harsh Prateek Bora <harshpb@xxxxxxxxxxxxx>
Reviewed-by: Akihiko Odaki <akihiko.odaki@xxxxxxxxxx>
Message-id: 20240102153529.486531-3-stefanha@xxxxxxxxxx
Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
---
include/qemu/main-loop.h | 19 +++++++++----------
hw/i386/kvm/xen_evtchn.c | 14 +++++++-------
hw/i386/kvm/xen_gnttab.c | 2 +-
hw/mips/mips_int.c | 2 +-
hw/ppc/ppc.c | 2 +-
target/i386/kvm/xen-emu.c | 2 +-
target/ppc/excp_helper.c | 2 +-
target/ppc/helper_regs.c | 2 +-
target/riscv/cpu_helper.c | 4 ++--
9 files changed, 24 insertions(+), 25 deletions(-)
diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
index 72ebc0cb3a..c26ad2a029 100644
--- a/include/qemu/main-loop.h
+++ b/include/qemu/main-loop.h
@@ -343,33 +343,32 @@ void bql_lock_impl(const char *file, int line);
void bql_unlock(void);
/**
- * QEMU_IOTHREAD_LOCK_GUARD
+ * BQL_LOCK_GUARD
*
* Wrap a block of code in a conditional bql_{lock,unlock}.
*/
-typedef struct IOThreadLockAuto IOThreadLockAuto;
+typedef struct BQLLockAuto BQLLockAuto;
-static inline IOThreadLockAuto *qemu_iothread_auto_lock(const char *file,
- int line)
+static inline BQLLockAuto *bql_auto_lock(const char *file, int line)
{
if (bql_locked()) {
return NULL;
}
bql_lock_impl(file, line);
/* Anything non-NULL causes the cleanup function to be called */
- return (IOThreadLockAuto *)(uintptr_t)1;
+ return (BQLLockAuto *)(uintptr_t)1;
}
-static inline void qemu_iothread_auto_unlock(IOThreadLockAuto *l)
+static inline void bql_auto_unlock(BQLLockAuto *l)
{
bql_unlock();
}
-G_DEFINE_AUTOPTR_CLEANUP_FUNC(IOThreadLockAuto, qemu_iothread_auto_unlock)
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(BQLLockAuto, bql_auto_unlock)
-#define QEMU_IOTHREAD_LOCK_GUARD() \
- g_autoptr(IOThreadLockAuto) _iothread_lock_auto __attribute__((unused)) \
- = qemu_iothread_auto_lock(__FILE__, __LINE__)
+#define BQL_LOCK_GUARD() \
+ g_autoptr(BQLLockAuto) _bql_lock_auto __attribute__((unused)) \
+ = bql_auto_lock(__FILE__, __LINE__)
/*
* qemu_cond_wait_iothread: Wait on condition for the main loop mutex
diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index 4a835a1010..0171ef6d59 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -1127,7 +1127,7 @@ int xen_evtchn_reset_op(struct evtchn_reset *reset)
return -ESRCH;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
return xen_evtchn_soft_reset();
}
@@ -1145,7 +1145,7 @@ int xen_evtchn_close_op(struct evtchn_close *close)
return -EINVAL;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
qemu_mutex_lock(&s->port_lock);
ret = close_port(s, close->port, &flush_kvm_routes);
@@ -1272,7 +1272,7 @@ int xen_evtchn_bind_pirq_op(struct evtchn_bind_pirq *pirq)
return -EINVAL;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
if (s->pirq[pirq->pirq].port) {
return -EBUSY;
@@ -1824,7 +1824,7 @@ int xen_physdev_map_pirq(struct physdev_map_pirq *map)
return -ENOTSUP;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
QEMU_LOCK_GUARD(&s->port_lock);
if (map->domid != DOMID_SELF && map->domid != xen_domid) {
@@ -1884,7 +1884,7 @@ int xen_physdev_unmap_pirq(struct physdev_unmap_pirq *unmap)
return -EINVAL;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
qemu_mutex_lock(&s->port_lock);
if (!pirq_inuse(s, pirq)) {
@@ -1924,7 +1924,7 @@ int xen_physdev_eoi_pirq(struct physdev_eoi *eoi)
return -ENOTSUP;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
QEMU_LOCK_GUARD(&s->port_lock);
if (!pirq_inuse(s, pirq)) {
@@ -1956,7 +1956,7 @@ int xen_physdev_query_pirq(struct physdev_irq_status_query *query)
return -ENOTSUP;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
QEMU_LOCK_GUARD(&s->port_lock);
if (!pirq_inuse(s, pirq)) {
diff --git a/hw/i386/kvm/xen_gnttab.c b/hw/i386/kvm/xen_gnttab.c
index a0cc30f619..245e4b15db 100644
--- a/hw/i386/kvm/xen_gnttab.c
+++ b/hw/i386/kvm/xen_gnttab.c
@@ -176,7 +176,7 @@ int xen_gnttab_map_page(uint64_t idx, uint64_t gfn)
return -EINVAL;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
QEMU_LOCK_GUARD(&s->gnt_lock);
xen_overlay_do_map_page(&s->gnt_aliases[idx], gpa);
diff --git a/hw/mips/mips_int.c b/hw/mips/mips_int.c
index 6c32e466a3..eef2fd2cd1 100644
--- a/hw/mips/mips_int.c
+++ b/hw/mips/mips_int.c
@@ -36,7 +36,7 @@ static void cpu_mips_irq_request(void *opaque, int irq, int level)
return;
}
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
if (level) {
env->CP0_Cause |= 1 << (irq + CP0Ca_IP);
diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c
index da1626f4d2..fadb8f5239 100644
--- a/hw/ppc/ppc.c
+++ b/hw/ppc/ppc.c
@@ -47,7 +47,7 @@ void ppc_set_irq(PowerPCCPU *cpu, int irq, int level)
unsigned int old_pending;
/* We may already have the BQL if coming from the reset path */
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
old_pending = env->pending_interrupts;
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index b0ed2e6aeb..fc2c2321ac 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -581,7 +581,7 @@ static int xen_set_shared_info(uint64_t gfn)
uint64_t gpa = gfn << TARGET_PAGE_BITS;
int i, err;
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
/*
* The xen_overlay device tells KVM about it too, since it had to
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 8a2bfb5aa2..2ec6429e36 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -2222,7 +2222,7 @@ static int ppc_next_unmasked_interrupt(CPUPPCState *env)
void ppc_maybe_interrupt(CPUPPCState *env)
{
CPUState *cs = env_cpu(env);
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
if (ppc_next_unmasked_interrupt(env)) {
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
diff --git a/target/ppc/helper_regs.c b/target/ppc/helper_regs.c
index f380342d4d..e0b2dcd02e 100644
--- a/target/ppc/helper_regs.c
+++ b/target/ppc/helper_regs.c
@@ -244,7 +244,7 @@ void cpu_interrupt_exittb(CPUState *cs)
* unless running with TCG.
*/
if (tcg_enabled()) {
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
cpu_interrupt(cs, CPU_INTERRUPT_EXITTB);
}
}
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index e7e23b34f4..99d1275729 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -655,7 +655,7 @@ void riscv_cpu_interrupt(CPURISCVState *env)
uint64_t gein, vsgein = 0, vstip = 0, irqf = 0;
CPUState *cs = env_cpu(env);
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
if (env->virt_enabled) {
gein = get_field(env->hstatus, HSTATUS_VGEIN);
@@ -681,7 +681,7 @@ uint64_t riscv_cpu_update_mip(CPURISCVState *env, uint64_t mask, uint64_t value)
/* No need to update mip for VSTIP */
mask = ((mask == MIP_VSTIP) && env->vstime_irq) ? 0 : mask;
- QEMU_IOTHREAD_LOCK_GUARD();
+ BQL_LOCK_GUARD();
env->mip = (env->mip & ~mask) | (value & mask);
--
2.43.0
