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From: "Alex Bennée" <alex.bennee@linaro.org>
To: peter.maydell@linaro.org, rth@twiddle.net, pbonzini@redhat.com
Cc: qemu-devel@nongnu.org, mttcg@listserver.greensocs.com,
	fred.konrad@greensocs.com, a.rigo@virtualopensystems.com,
	cota@braap.org, bobby.prani@gmail.com, nikunj@linux.vnet.ibm.com,
	"Alex Bennée" <alex.bennee@linaro.org>,
	"Peter Crosthwaite" <crosthwaite.peter@gmail.com>
Subject: [Qemu-devel] [PATCH v2 04/11] translate: downgrade IRQ BQL asserts to tcg_debug_assert
Date: Thu,  2 Mar 2017 19:53:30 +0000	[thread overview]
Message-ID: <20170302195337.31558-5-alex.bennee@linaro.org> (raw)
In-Reply-To: <20170302195337.31558-1-alex.bennee@linaro.org>

While on MTTCG hosts it is very important that updates to
cpu->interrupt_request are protected by the BQL not all guests have
been converted to the correct locking yet. As a result we are seeing
breaking on non-MTTCG enabled guests in production builds.

The locking in the guests needs to be fixed but while running single
threaded they will continue to work. By moving the asserts to
tcg_debug_asserts() they will still be useful during conversion
work (much like the existing assert_memory_lock/assert_tb_lock
asserts).

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 translate-all.c    | 2 +-
 translate-common.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/translate-all.c b/translate-all.c
index 9bac061c9b..7ee273410d 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -1928,7 +1928,7 @@ void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf)
 
 void cpu_interrupt(CPUState *cpu, int mask)
 {
-    g_assert(qemu_mutex_iothread_locked());
+    tcg_debug_assert(qemu_mutex_iothread_locked());
     cpu->interrupt_request |= mask;
     cpu->tcg_exit_req = 1;
 }
diff --git a/translate-common.c b/translate-common.c
index d504dd0d33..24e05c077a 100644
--- a/translate-common.c
+++ b/translate-common.c
@@ -22,6 +22,7 @@
 #include "qom/cpu.h"
 #include "sysemu/cpus.h"
 #include "qemu/main-loop.h"
+#include "tcg.h"
 
 uintptr_t qemu_real_host_page_size;
 intptr_t qemu_real_host_page_mask;
@@ -31,7 +32,7 @@ intptr_t qemu_real_host_page_mask;
 static void tcg_handle_interrupt(CPUState *cpu, int mask)
 {
     int old_mask;
-    g_assert(qemu_mutex_iothread_locked());
+    tcg_debug_assert(qemu_mutex_iothread_locked());
 
     old_mask = cpu->interrupt_request;
     cpu->interrupt_request |= mask;
-- 
2.11.0

  parent reply	other threads:[~2017-03-02 19:53 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-02 19:53 [Qemu-devel] [PATCH v2 00/11] MTTCG fixups for 2.9 Alex Bennée
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 01/11] vl/cpus: be smarter with icount and MTTCG Alex Bennée
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 02/11] target/i386/cpu.h: declare TCG_GUEST_DEFAULT_MO Alex Bennée
2017-03-03 19:28   ` Eduardo Habkost
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 03/11] cpus.c: add additional error_report when !TARGET_SUPPORT_MTTCG Alex Bennée
2017-03-02 19:53 ` Alex Bennée [this message]
2017-03-03 10:08   ` [Qemu-devel] [PATCH v2 04/11] translate: downgrade IRQ BQL asserts to tcg_debug_assert Peter Maydell
2017-03-03 11:05     ` Alex Bennée
2017-03-03 11:19       ` Peter Maydell
2017-03-03 19:35         ` Richard Henderson
2017-03-03 19:47           ` Eric Blake
2017-03-03 19:48             ` Eric Blake
2017-03-03 11:49     ` Paolo Bonzini
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 05/11] translate-all: exit cpu_restore_state early if translating Alex Bennée
2017-03-02 21:46   ` Richard Henderson
2017-03-03 10:03     ` Alex Bennée
2017-03-03 19:50       ` Richard Henderson
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 06/11] sparc/sparc64: grab BQL before calling cpu_check_irqs Alex Bennée
2017-03-03 11:47   ` Paolo Bonzini
2017-03-06 10:28     ` Alex Bennée
2017-03-06 13:22       ` Paolo Bonzini
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 07/11] s390x/misc_helper.c: wrap IO instructions in BQL Alex Bennée
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 08/11] target/xtensa: hold BQL for interrupt processing Alex Bennée
2017-03-07  0:15   ` Max Filippov
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 09/11] target/mips/op_helper: hold BQL before calling cpu_mips_get_count Alex Bennée
2017-03-03 11:18   ` Yongbok Kim
2017-03-03 12:54     ` Alex Bennée
2017-03-03 13:00       ` Yongbok Kim
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 10/11] target/arm/helper: make it clear the EC field is also in hex Alex Bennée
2017-03-03 17:07   ` Frederic Konrad
2017-03-03 18:10   ` Peter Maydell
2017-03-02 19:53 ` [Qemu-devel] [PATCH v2 11/11] hw/intc/arm_gic: modernise the DPRINTF Alex Bennée
2017-03-03 17:05   ` Frederic Konrad
2017-03-03 17:09     ` Peter Maydell
2017-03-03 18:09   ` Peter Maydell
2017-03-03 17:38 ` [Qemu-devel] [PATCH v2 00/11] MTTCG fixups for 2.9 Frederic Konrad
2017-03-06  9:43   ` Alex Bennée
2017-03-06 10:45     ` Frederic Konrad

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