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[82.13.64.36]) by smtp.gmail.com with ESMTPSA id t13-20020a05600c198d00b00412b0e51ef9sm12810270wmq.31.2024.03.12.07.28.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Mar 2024 07:28:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.com; s=google; t=1710253688; x=1710858488; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=l8yhocMsTnBM9RxbWE+rnkoHnCZQapESNY+2+Nhur+g=; b=HX2N7E6U/HOsAQyGxZ7NHQBXsZyOwy0kjTW6zxPMytZ3A07GI6ljxeaZq6FWtLXZl9 8sM9pI9Ns7P/E3EL5qU20SkHd3yfETd4HyqE5cYdG/NyvqYhyIsvnGSLW6uTr3ENzYhf QO1+RN+q5UBB46tVh0d9kut81D+pX4vJY2dGk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710253688; x=1710858488; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=l8yhocMsTnBM9RxbWE+rnkoHnCZQapESNY+2+Nhur+g=; b=APbSWf9VMkE9aCZOhIaz00YduSJMzZLwYUyTbIDZUBLVoU8WFWUSP8P2rZ50vdc+7x /iNgSSSGa/aDX9ewrMWXMl2lCyKfzzN+/3drbyHXPXsntI7mOmb6Ui2tsaRv+d6BrFSI RhbACLAdKqmYrZ1hMkNtuM0zX8HfFH4iRSMOLfoK1v9Bkq5TBrp99pISTECfxPMQ0KZ5 mT20Z8aXCNFTOuEo8VLFLugAHV+SWo135RB3GfUq8VYuPhCdXlyfeLJ+DpAvG8mUjnEo DQuHHLQqO5A03qQCIvLKCjHMc0gI5/T6TOrxKwc0bZT4T2z7+FB+GOS6JRNyyw5FOB4X gxfw== X-Gm-Message-State: AOJu0YzkLoWB1uiHOk5+5c38fKZOT9fbQusONGr2f9ddrDIe6qHOwIa/ XjvgiBw+dm5f3pWgAg7hMzECMe9aDzs5YIA9kvhdbjEJDo/caRiLjjepuK2Fs06WYaFSOvQ3XfB A X-Google-Smtp-Source: AGHT+IFwwMUJ7IS7QPhDsUKLmaL2ThpgcxUY4sHiuWDlxBPvSNMOq0R7FMOkswp3Hq0AM9ENHwuErA== X-Received: by 2002:a05:600c:3d9b:b0:413:38c6:2c7a with SMTP id bi27-20020a05600c3d9b00b0041338c62c7amr1370102wmb.22.1710253687811; Tue, 12 Mar 2024 07:28:07 -0700 (PDT) From: Anthony PERARD To: qemu-devel@nongnu.org Cc: Peng Fan Subject: [PULL 2/3] xen: Drop out of coroutine context xen_invalidate_map_cache_entry Date: Tue, 12 Mar 2024 14:27:56 +0000 Message-Id: <20240312142757.34141-3-anthony.perard@citrix.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240312142757.34141-1-anthony.perard@citrix.com> References: <20240312142757.34141-1-anthony.perard@citrix.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::32d; envelope-from=anthony.perard@cloud.com; helo=mail-wm1-x32d.google.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.687, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @citrix.com) X-ZM-MESSAGEID: 1710253719892100005 Content-Type: text/plain; charset="utf-8" From: Peng Fan xen_invalidate_map_cache_entry is not expected to run in a coroutine. Without this, there is crash: signo=3Dsigno@entry=3D6, no_tid=3Dno_tid@entry=3D0) at pthread_kill.c:44 threadid=3D) at pthread_kill.c:78 at /usr/src/debug/glibc/2.38+git-r0/sysdeps/posix/raise.c:26 fmt=3D0xffff9e1ca8a8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=3Dassertion@entry=3D0xaaaae0d25740 "!qemu_in_coroutine()", file=3Dfile@entry=3D0xaaaae0d301a8 "../qemu-xen-dir-remote/block/graph-= lock.c", line=3Dline@entry=3D260, function=3Dfunction@entry=3D0xaaaae0e522c0 <__PRETTY_FUNCTION__.3> "bdr= v_graph_rdlock_main_loop") at assert.c:92 assertion=3Dassertion@entry=3D0xaaaae0d25740 "!qemu_in_coroutine()", file=3Dfile@entry=3D0xaaaae0d301a8 "../qemu-xen-dir-remote/block/graph-= lock.c", line=3Dline@entry=3D260, function=3Dfunction@entry=3D0xaaaae0e522c0 <__PRETTY_FUNCTION__.3> "bdr= v_graph_rdlock_main_loop") at assert.c:101 at ../qemu-xen-dir-remote/block/graph-lock.c:260 at /home/Freenix/work/sw-stash/xen/upstream/tools/qemu-xen-dir-remote/i= nclude/block/graph-lock.h:259 host=3Dhost@entry=3D0xffff742c8000, size=3Dsize@entry=3D2097152) at ../qemu-xen-dir-remote/block/io.c:3362 host=3D0xffff742c8000, size=3D2097152) at ../qemu-xen-dir-remote/block/block-backend.c:2859 host=3D, size=3D, max_size=3D) at ../qemu-xen-dir-remote/block/block-ram-registrar.c:33 size=3D2097152, max_size=3D2097152) at ../qemu-xen-dir-remote/hw/core/numa.c:883 buffer=3Dbuffer@entry=3D0xffff743c5000 "") at ../qemu-xen-dir-remote/hw/xen/xen-mapcache.c:475 buffer=3Dbuffer@entry=3D0xffff743c5000 "") at ../qemu-xen-dir-remote/hw/xen/xen-mapcache.c:487 as=3Das@entry=3D0xaaaae1ca3ae8 , buffer=3D0xffff7= 43c5000, len=3D, is_write=3Dis_write@entry=3Dtrue, access_len=3Daccess_len@entry=3D32768) at ../qemu-xen-dir-remote/system/physmem.c:3199 dir=3DDMA_DIRECTION_FROM_DEVICE, len=3D, buffer=3D, as=3D0xaaaae1ca3ae8 ) at /home/Freenix/work/sw-stash/xen/upstream/tools/qemu-xen-dir-remote/i= nclude/sysemu/dma.h:236 elem=3Delem@entry=3D0xaaaaf620aa30, len=3Dlen@entry=3D32769) at ../qemu-xen-dir-remote/hw/virtio/virtio.c:758 elem=3Delem@entry=3D0xaaaaf620aa30, len=3Dlen@entry=3D32769, idx=3Didx@= entry=3D0) at ../qemu-xen-dir-remote/hw/virtio/virtio.c:919 elem=3Delem@entry=3D0xaaaaf620aa30, len=3D32769) at ../qemu-xen-dir-remote/hw/virtio/virtio.c:994 req=3Dreq@entry=3D0xaaaaf620aa30, status=3Dstatus@entry=3D0 '\000') at ../qemu-xen-dir-remote/hw/block/virtio-blk.c:67 ret=3D0) at ../qemu-xen-dir-remote/hw/block/virtio-blk.c:136 at ../qemu-xen-dir-remote/block/block-backend.c:1559 --Type for more, q to quit, c to continue without paging-- at ../qemu-xen-dir-remote/block/block-backend.c:1614 i1=3D) at ../qemu-xen-dir-remote/util/coroutine-ucontext= .c:177 at ../sysdeps/unix/sysv/linux/aarch64/setcontext.S:123 Signed-off-by: Peng Fan Reviewed-by: Stefano Stabellini Message-Id: <20240124021450.21656-1-peng.fan@oss.nxp.com> Signed-off-by: Anthony PERARD --- hw/xen/xen-mapcache.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/hw/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c index 4f956d048e..7f59080ba7 100644 --- a/hw/xen/xen-mapcache.c +++ b/hw/xen/xen-mapcache.c @@ -476,11 +476,37 @@ static void xen_invalidate_map_cache_entry_unlocked(u= int8_t *buffer) g_free(entry); } =20 -void xen_invalidate_map_cache_entry(uint8_t *buffer) +typedef struct XenMapCacheData { + Coroutine *co; + uint8_t *buffer; +} XenMapCacheData; + +static void xen_invalidate_map_cache_entry_bh(void *opaque) { + XenMapCacheData *data =3D opaque; + mapcache_lock(); - xen_invalidate_map_cache_entry_unlocked(buffer); + xen_invalidate_map_cache_entry_unlocked(data->buffer); mapcache_unlock(); + + aio_co_wake(data->co); +} + +void coroutine_mixed_fn xen_invalidate_map_cache_entry(uint8_t *buffer) +{ + if (qemu_in_coroutine()) { + XenMapCacheData data =3D { + .co =3D qemu_coroutine_self(), + .buffer =3D buffer, + }; + aio_bh_schedule_oneshot(qemu_get_current_aio_context(), + xen_invalidate_map_cache_entry_bh, &data); + qemu_coroutine_yield(); + } else { + mapcache_lock(); + xen_invalidate_map_cache_entry_unlocked(buffer); + mapcache_unlock(); + } } =20 void xen_invalidate_map_cache(void) --=20 Anthony PERARD