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Peter Xu 1d9efa73e1 intel-iommu: add iommu lock 
SECURITY IMPLICATION: this patch fixes a potential race when multiple
threads access the IOMMU IOTLB cache.

Add a per-iommu big lock to protect IOMMU status.  Currently the only
thing to be protected is the IOTLB/context cache, since that can be
accessed even without BQL, e.g., in IO dataplane.

Note that we don't need to protect device page tables since that's fully
controlled by the guest kernel.  However there is still possibility that
malicious drivers will program the device to not obey the rule.  In that
case QEMU can't really do anything useful, instead the guest itself will
be responsible for all uncertainties.

CC: QEMU Stable <qemu-stable@nongnu.org>
Reported-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 		2018-05-23 17:33:57 +03:00
..
9pfs 9p: add trace event for v9fs_setattr() 2018-05-02 08:59:24 +02:00
acpi acpi: fix a comment about aml_call0() 2018-05-20 08:58:58 +03:00
adc Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
alpha hw/alpha/dp264: Use the TYPE_SMC37C669_SUPERIO 2018-03-12 16:12:49 +01:00
arm Remove unnecessary variables for function return value 2018-05-20 08:48:13 +03:00
audio hw/audio: Fix crashes when devices are used on ISA bus without DMA 2018-03-26 14:37:13 +02:00
block Remove unnecessary variables for function return value 2018-05-20 08:48:13 +03:00
bt hw/bt: Replace fprintf(stderr, "*\n" with error_report() 2018-01-22 09:51:00 +01:00
char hw/char/cmsdk-apb-uart.c: Accept more input after character read 2018-05-04 18:05:50 +01:00
core -----BEGIN PGP SIGNATURE----- 2018-05-14 14:15:27 +01:00
cpu hw: use "qemu/osdep.h" as first #include in source files 2017-12-18 17:07:02 +03:00
cris Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
display ui: add x_keymap.o to modules 2018-05-18 09:13:37 +02:00
dma xlnx-zdma: Add a model of the Xilinx ZynqMP generic DMA 2018-05-18 17:48:07 +01:00
gpio Replace all occurances of __FUNCTION__ with __func__ 2018-01-22 09:46:18 +01:00
hppa Remove unnecessary variables for function return value 2018-05-20 08:48:13 +03:00
i2c hw/i2c-ddc: Do not fail writes 2018-03-01 11:05:45 +00:00
i386 intel-iommu: add iommu lock 2018-05-23 17:33:57 +03:00
ide hw/ide/ahci: Keep ALLWINNER_AHCI() macro internal 2018-05-20 08:37:53 +03:00
input ps2: Fix mouse stream corruption due to lost data 2018-05-15 11:31:33 +02:00
intc heathrow: remove obsolete heathow_init() function 2018-04-27 18:05:22 +10:00
ipack pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices 2017-10-15 05:54:43 +03:00
ipmi qapi: Empty out qapi-schema.json 2018-03-02 13:45:50 -06:00
isa Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
lm32 Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
m68k hw/m68k/mcf5208: Fix trivial typo in board description 2018-05-01 15:37:54 +02:00
mem nvdimm: fix typo in label-size definition 2018-05-23 17:02:03 +03:00
microblaze Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
mips serial-isa: Use MAX_ISA_SERIAL_PORTS instead of MAX_SERIAL_PORTS 2018-04-26 13:57:00 +01:00
misc Remove unnecessary variables for function return value 2018-05-20 08:48:13 +03:00
moxie Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
net Remove unnecessary variables for function return value 2018-05-20 08:48:13 +03:00
nios2 Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
nvram Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
openrisc Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
pci virtio,vhost,pci,pc: features, cleanups 2018-03-20 15:48:34 +00:00
pci-bridge virtio,vhost,pci,pc: features, fixes and cleanups 2018-02-13 16:33:31 +00:00
pci-host hw/pci-host/q35: Replace hardcoded value with macro 2018-05-23 03:14:40 +03:00
pcmcia hw: Clean up includes 2016-01-29 15:07:25 +00:00
ppc Remove unnecessary variables for function return value 2018-05-20 08:48:13 +03:00
rdma hw/rdma: Fix possible out of bounds access to port GID index 2018-05-03 20:52:29 +03:00
riscv RISC-V: QEMU 2.13 Minor Fixes 2018-05-10 10:25:15 +01:00
s390x s390x: refactor reset/reipl handling 2018-05-14 17:10:02 +02:00
scsi hw/scsi: support SCSI-2 passthrough without PI 2018-04-09 16:36:39 +02:00
sd sdcard: Correct CRC16 offset in sd_function_switch() 2018-05-15 14:58:44 +01:00
sh4 Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
smbios Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
sparc Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
sparc64 serial-isa: Use MAX_ISA_SERIAL_PORTS instead of MAX_SERIAL_PORTS 2018-04-26 13:57:00 +01:00
ssi xilinx_spips: Correct SNOOP_NONE state when flushing the txfifo 2018-04-26 11:04:40 +01:00
timer hw/timer/mt48t59: Fix bit-rotten NVRAM_PRINTF format strings 2018-05-20 08:50:16 +03:00
tpm tpm: CRB: Enforce locality is requested before processing buffer 2018-03-29 17:41:02 -04:00
tricore hw: Do not include "sysemu/block-backend.h" if it is not necessary 2018-03-12 16:12:46 +01:00
unicore32 hw/input/i8042: Extract declarations from i386/pc.h into input/i8042.h 2018-03-12 16:12:48 +01:00
usb hw/usb/dev-smartcard-reader: Handle 64 B USB packets 2018-05-18 09:42:16 +02:00
vfio vfio-ccw: introduce vfio_ccw_get_device() 2018-04-30 10:31:41 +02:00
virtio hw/virtio: Fix brace Werror with clang 6.0.0 2018-05-23 17:02:02 +03:00
watchdog qapi: Empty out qapi-schema.json 2018-03-02 13:45:50 -06:00
xen xen: Expect xenstore write to fail when restricted 2018-04-26 16:29:51 +01:00
xenpv hw/xen*: Replace fprintf(stderr, "*\n" with error_report() 2018-02-06 18:29:46 +01:00
xtensa Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
Makefile.objs hw/rdma: Add wrappers and macros 2018-02-19 13:03:24 +02:00