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From: "Alex Bennée" <alex.bennee@linaro.org>
To: pbonzini@redhat.com, boost.lists@gmail.com, pavel.dovgaluk@ispras.ru
Cc: cota@braap.org, qemu-devel@nongnu.org,
	"Alex Bennée" <alex.bennee@linaro.org>,
	"Peter Maydell" <peter.maydell@linaro.org>,
	"open list:ARM" <qemu-arm@nongnu.org>
Subject: [Qemu-devel] [RFC PATCH v1 1/9] target/arm/arm-powertctl: drop BQL assertions
Date: Fri,  5 May 2017 11:38:14 +0100	[thread overview]
Message-ID: <20170505103822.20641-2-alex.bennee@linaro.org> (raw)
In-Reply-To: <20170505103822.20641-1-alex.bennee@linaro.org>

The powerctl code is run in the context of the vCPU changing power
state. It does not need the BQL to protect its changes.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 target/arm/arm-powerctl.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/target/arm/arm-powerctl.c b/target/arm/arm-powerctl.c
index 25207cb850..9661a59dad 100644
--- a/target/arm/arm-powerctl.c
+++ b/target/arm/arm-powerctl.c
@@ -124,7 +124,6 @@ static void arm_set_cpu_on_async_work(CPUState *target_cpu_state,
     g_free(info);
 
     /* Finally set the power status */
-    assert(qemu_mutex_iothread_locked());
     target_cpu->power_state = PSCI_ON;
 }
 
@@ -135,8 +134,6 @@ int arm_set_cpu_on(uint64_t cpuid, uint64_t entry, uint64_t context_id,
     ARMCPU *target_cpu;
     struct CpuOnInfo *info;
 
-    assert(qemu_mutex_iothread_locked());
-
     DPRINTF("cpu %" PRId64 " (EL %d, %s) @ 0x%" PRIx64 " with R0 = 0x%" PRIx64
             "\n", cpuid, target_el, target_aa64 ? "aarch64" : "aarch32", entry,
             context_id);
@@ -227,7 +224,6 @@ static void arm_set_cpu_off_async_work(CPUState *target_cpu_state,
 {
     ARMCPU *target_cpu = ARM_CPU(target_cpu_state);
 
-    assert(qemu_mutex_iothread_locked());
     target_cpu->power_state = PSCI_OFF;
     target_cpu_state->halted = 1;
     target_cpu_state->exception_index = EXCP_HLT;
@@ -238,8 +234,6 @@ int arm_set_cpu_off(uint64_t cpuid)
     CPUState *target_cpu_state;
     ARMCPU *target_cpu;
 
-    assert(qemu_mutex_iothread_locked());
-
     DPRINTF("cpu %" PRId64 "\n", cpuid);
 
     /* change to the cpu we are powering up */
@@ -274,8 +268,6 @@ int arm_reset_cpu(uint64_t cpuid)
     CPUState *target_cpu_state;
     ARMCPU *target_cpu;
 
-    assert(qemu_mutex_iothread_locked());
-
     DPRINTF("cpu %" PRId64 "\n", cpuid);
 
     /* change to the cpu we are resetting */
-- 
2.11.0

  reply	other threads:[~2017-05-05 10:37 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-05 10:38 [Qemu-devel] [RFC PATCH v1 0/9] BQL and Replay Lock changes Alex Bennée
2017-05-05 10:38 ` Alex Bennée [this message]
2017-05-05 10:38 ` [Qemu-devel] [RFC PATCH v1 2/9] cpus: push BQL lock to qemu_*_wait_io_event Alex Bennée
2017-05-05 10:38 ` [Qemu-devel] [RFC PATCH v1 3/9] cpus: only take BQL for sleeping threads Alex Bennée
2017-05-05 15:15   ` Paolo Bonzini
2017-05-05 15:28     ` Alex Bennée
2017-05-05 10:38 ` [Qemu-devel] [RFC PATCH v1 4/9] replay/replay-internal.c: track holding of replay_lock Alex Bennée
2017-05-05 10:38 ` [Qemu-devel] [RFC PATCH v1 5/9] replay: make locking visible outside replay code Alex Bennée
2017-05-05 10:38 ` [Qemu-devel] [RFC PATCH v1 6/9] replay: push replay_mutex_lock up the call tree Alex Bennée
2017-05-05 10:38 ` [Qemu-devel] [RFC PATCH v1 7/9] scripts/qemu-gdb: add simple tcg lock status helper Alex Bennée
2017-05-05 10:38 ` [Qemu-devel] [RFC PATCH v1 8/9] util/qemu-thread-*: add qemu_lock, locked and unlock trace events Alex Bennée
2017-05-05 15:17   ` Paolo Bonzini
2017-05-05 15:59     ` Alex Bennée
2017-05-06  8:19       ` Paolo Bonzini
2017-05-08 17:52       ` Stefan Hajnoczi
2017-05-09 13:50         ` Alex Bennée
2017-05-09 13:55           ` Paolo Bonzini
2017-05-05 10:38 ` [Qemu-devel] [RFC PATCH v1 9/9] scripts/analyse-locks-simpletrace.py: script to analyse lock times Alex Bennée
2017-05-05 15:38 ` [Qemu-devel] [RFC PATCH v1 0/9] BQL and Replay Lock changes no-reply
2017-05-10 13:51 ` Pavel Dovgalyuk
2017-05-10 15:24   ` Alex Bennée
2017-05-11 11:23     ` Pavel Dovgalyuk
2017-06-05 10:52 ` Pavel Dovgalyuk
2017-06-06  9:34   ` Alex Bennée

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