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qemu/hw/virtio
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Jason Wang d152cdd6f6 virtio: use virtio accessor to access packed event 
We used to access packed descriptor event and off_wrap via
address_space_{write|read}_cached(). When we hit the cache, memcpy()
is used which is not atomic which may lead a wrong value to be read or
wrote.

This patch fixes this by switching to use
virito_{stw|lduw}_phys_cached() to make sure the access is atomic.

Fixes: 683f766567 ("virtio: event suppression support for packed ring")
Cc: qemu-stable@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20211111063854.29060-2-jasowang@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-11-15 09:44:46 -05:00
..
Kconfig vhost-user-rng: Add vhost-user-rng implementation 2021-10-20 04:37:55 -04:00
meson.build vhost-user-rng-pci: Add vhost-user-rng-pci implementation 2021-10-20 04:37:55 -04:00
trace-events vdpa: Check for iova range at mappings changes 2021-10-20 04:37:55 -04:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vhost-backend.c hw/virtio: move vhost_set_backend_type() to vhost.c 2021-09-04 09:07:46 -04:00
vhost-scsi-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
vhost-stub.c vhost-user: simplify vhost_user_init/vhost_user_cleanup 2019-03-12 21:22:31 -04:00
vhost-user-blk-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
vhost-user-fs-pci.c vhost-user-fs: add the "bootindex" property 2021-01-13 09:06:37 -05:00
vhost-user-fs.c vhost: Add Error parameter to vhost_dev_init() 2021-06-30 13:15:44 +02:00
vhost-user-i2c-pci.c hw/virtio: add vhost-user-i2c-pci boilerplate 2021-07-16 11:10:45 -04:00
vhost-user-i2c.c hw/virtio: add boilerplate for vhost-user-i2c device 2021-07-16 11:10:40 -04:00
vhost-user-input-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
vhost-user-rng-pci.c vhost-user-rng-pci: Add vhost-user-rng-pci implementation 2021-10-20 04:37:55 -04:00
vhost-user-rng.c vhost-user-rng: Add vhost-user-rng implementation 2021-10-20 04:37:55 -04:00
vhost-user-scsi-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
vhost-user-vsock-pci.c vhost-user-vsock-pci: force virtio version 1 2020-09-29 02:15:24 -04:00
vhost-user-vsock.c vhost-vsock: handle common features in vhost-vsock-common 2021-10-05 17:30:57 -04:00
vhost-user.c vhost-user: fix duplicated notifier MR init 2021-10-20 04:37:55 -04:00
vhost-vdpa.c vhost: Rename last_index to vq_index_end 2021-11-11 03:13:05 -05:00
vhost-vsock-common.c vhost-vsock: handle common features in vhost-vsock-common 2021-10-05 17:30:57 -04:00
vhost-vsock-pci.c vhost-vsock-pci: force virtio version 1 2020-09-29 02:15:24 -04:00
vhost-vsock.c vhost-vsock: handle common features in vhost-vsock-common 2021-10-05 17:30:57 -04:00
vhost.c memory: Name all the memory listeners 2021-09-30 15:30:24 +02:00
virtio-9p-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio-balloon-pci.c hw/virtio/virtio-balloon: Remove the "class" property 2021-02-05 08:52:59 -05:00
virtio-balloon.c virtio-balloon: Fix page-poison subsection name 2021-10-05 17:30:57 -04:00
virtio-blk-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio-bus.c virtio-bus: introduce iommu_enabled() 2021-09-04 16:35:17 -04:00
virtio-crypto-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio-crypto.c virtio-crypto: don't modify elem->in/out_sg 2020-09-23 13:41:58 +01:00
virtio-input-host-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio-input-pci.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
virtio-iommu-pci.c virtio-iommu: Drop base_name and change generic_name 2021-10-20 04:37:55 -04:00
virtio-iommu.c virtio-iommu: Handle non power of 2 range invalidations 2021-03-12 12:40:10 +00:00
virtio-mem-pci.c qapi: Include qom-path in MEMORY_DEVICE_SIZE_CHANGE qapi events 2021-10-02 08:43:21 +02:00
virtio-mem-pci.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio-mem.c virtio-mem: Drop precopy notifier 2021-11-01 22:56:44 +01:00
virtio-mmio.c qbus: Rename qbus_create_inplace() to qbus_init() 2021-09-30 13:42:10 +01:00
virtio-net-pci.c virtio-net: calculating proper msix vectors on init 2021-03-15 16:41:22 +08:00
virtio-pci.c qbus: Rename qbus_create_inplace() to qbus_init() 2021-09-30 13:42:10 +01:00
virtio-pci.h virtio-pci: compat page aligned ATS 2021-04-06 07:11:36 -04:00
virtio-pmem-pci.c virtio-pmem-pci: force virtio version 1 2020-09-29 02:14:30 -04:00
virtio-pmem-pci.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio-pmem.c virtio-pmem: fix virtio_pmem_resp assign problem 2021-03-22 10:17:53 -04:00
virtio-rng-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio-rng.c sysemu: Let VMChangeStateHandler take boolean 'running' argument 2021-03-09 23:13:57 +01:00
virtio-scsi-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio-serial-pci.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
virtio.c virtio: use virtio accessor to access packed event 2021-11-15 09:44:46 -05:00