56 lines
1.9 KiB
Diff
56 lines
1.9 KiB
Diff
From 01c09f31978154f0d2fd699621ae958a8c3ea2a5 Mon Sep 17 00:00:00 2001
|
|
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
|
|
Date: Thu, 9 Mar 2023 08:15:24 -0500
|
|
Subject: [PATCH 08/13] physmem: add missing memory barrier
|
|
|
|
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
|
|
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
|
|
RH-Bugzilla: 2168472
|
|
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
|
|
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
|
|
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
RH-Acked-by: David Hildenbrand <david@redhat.com>
|
|
RH-Commit: [8/10] f6a9659f7cf40b78de6e85e4a7c06842273aa770
|
|
|
|
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
|
|
|
|
commit 33828ca11da08436e1b32f3e79dabce3061a0427
|
|
Author: Paolo Bonzini <pbonzini@redhat.com>
|
|
Date: Fri Mar 3 14:36:32 2023 +0100
|
|
|
|
physmem: add missing memory barrier
|
|
|
|
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
|
|
Reviewed-by: David Hildenbrand <david@redhat.com>
|
|
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
|
|
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
|
|
---
|
|
softmmu/physmem.c | 3 +++
|
|
1 file changed, 3 insertions(+)
|
|
|
|
diff --git a/softmmu/physmem.c b/softmmu/physmem.c
|
|
index 4d0ef5f92f..2b96fad302 100644
|
|
--- a/softmmu/physmem.c
|
|
+++ b/softmmu/physmem.c
|
|
@@ -3087,6 +3087,8 @@ void cpu_register_map_client(QEMUBH *bh)
|
|
qemu_mutex_lock(&map_client_list_lock);
|
|
client->bh = bh;
|
|
QLIST_INSERT_HEAD(&map_client_list, client, link);
|
|
+ /* Write map_client_list before reading in_use. */
|
|
+ smp_mb();
|
|
if (!qatomic_read(&bounce.in_use)) {
|
|
cpu_notify_map_clients_locked();
|
|
}
|
|
@@ -3279,6 +3281,7 @@ void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
|
|
qemu_vfree(bounce.buffer);
|
|
bounce.buffer = NULL;
|
|
memory_region_unref(bounce.mr);
|
|
+ /* Clear in_use before reading map_client_list. */
|
|
qatomic_mb_set(&bounce.in_use, false);
|
|
cpu_notify_map_clients();
|
|
}
|
|
--
|
|
2.37.3
|
|
|