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target/i386/misc_helper: wrap BQL around another IRQ generator 

Anything that calls into HW emulation must be protected by the BQL.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Alex Bennée 2017-03-30 16:04:09 +01:00
parent 8695350357
commit b4e79a502f
1 changed files with 3 additions and 0 deletions
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3
target/i386/misc_helper.c
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@ -18,6 +18,7 @@
*/ */
#include "qemu/osdep.h" #include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "cpu.h" #include "cpu.h"
#include "exec/helper-proto.h" #include "exec/helper-proto.h"
#include "exec/exec-all.h" #include "exec/exec-all.h"
@ -156,7 +157,9 @@ void helper_write_crN(CPUX86State *env, int reg, target_ulong t0)
break; break;
case 8: case 8:
if (!(env->hflags2 & HF2_VINTR_MASK)) { if (!(env->hflags2 & HF2_VINTR_MASK)) {
qemu_mutex_lock_iothread();
cpu_set_apic_tpr(x86_env_get_cpu(env)->apic_state, t0); cpu_set_apic_tpr(x86_env_get_cpu(env)->apic_state, t0);
qemu_mutex_unlock_iothread();
} }
env->v_tpr = t0 & 0x0f; env->v_tpr = t0 & 0x0f;
break; break;