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This is the 5.4.73 stable release
Conflicts:
- arch/arm/boot/dts/imx6sl.dtsi:
Commit [a1767c90194e2] in NXP tree is now covered with commit [5c4c2f437cead]
from upstream.
- drivers/gpu/drm/mxsfb/mxsfb_drv.c:
Resolve merge hunk for patch [ed8b90d303cf0] from upstream
- drivers/media/i2c/ov5640.c:
Patch [aa4bb8b8838ff] in NXP tree is now covered by patches [79ec0578c7e0a]
and [b2f8546056b35] from upstream. Changes from NXP patch [99aa4c8c18984] are
covered in upstream version as well.
- drivers/net/ethernet/freescale/fec_main.c:
Fix merge fuzz for patch [9e70485b40c83] from upstream.
- drivers/usb/cdns3/gadget.c:
Keep NXP version of the file, upstream version is not compatible.
- drivers/usb/dwc3/core.c:
- drivers/usb/dwc3/core.h:
Fix merge fuzz of patch [08045050c6bd2] together wth NXP patch [b30e41dc1e494]
- sound/soc/fsl/fsl_sai.c:
- sound/soc/fsl/fsl_sai.h:
Commit [2ea70e51eb72a] in NXP tree is now covered with commit [1ad7f52fe6683]
from upstream.
Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
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[ Upstream commit 2e6cfd496f5b57034cf2aec738799571b5a52124 ]
pfn is not added to pfn_list when vfio_add_to_pfn_list fails.
vfio_unpin_page_external will exit directly without calling
vfio_iova_put_vfio_pfn. This will lead to a memory leak.
Fixes: a54eb55045ae ("vfio iommu type1: Add support for mediated devices")
Signed-off-by: Xiaoyang Xu <xuxiaoyang2@huawei.com>
[aw: simplified logic, add Fixes]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit 852b1beecb6ff9326f7ca4bc0fe69ae860ebdb9e ]
The eventfd context is used as our irqbypass token, therefore if an
eventfd is re-used, our token is the same. The irqbypass code will
return an -EBUSY in this case, but we'll still attempt to unregister
the producer, where if that duplicate token still exists, results in
removing the wrong object. Clear the token of failed producers so
that they harmlessly fall out when unregistered.
Fixes: 6d7425f109d2 ("vfio: Register/unregister irq_bypass_producer")
Reported-by: guomin chen <guomin_chen@sina.com>
Tested-by: guomin chen <guomin_chen@sina.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit 515ecd5368f1510152fa4f9b9ce55b66ac56c334 ]
While it is true that devices with is_virtfn=1 will have a Memory Space
Enable bit that is hard-wired to 0, this is not the only case where we
see this behavior -- For example some bare-metal hypervisors lack
Memory Space Enable bit emulation for devices not setting is_virtfn
(s390). Fix this by instead checking for the newly-added
no_command_memory bit which directly denotes the need for
PCI_COMMAND_MEMORY emulation in vfio.
Fixes: abafbc551fdd ("vfio-pci: Invalidate mmaps and block MMIO access on disabled memory")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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This is the 5.4.69 stable release
Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
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[ Upstream commit b872d0640840018669032b20b6375a478ed1f923 ]
The vfio_pci_release call will free and clear the error and request
eventfd ctx while these ctx could be in use at the same time in the
function like vfio_pci_request, and it's expected to protect them under
the vdev->igate mutex, which is missing in vfio_pci_release.
This issue is introduced since commit 1518ac272e78 ("vfio/pci: fix memory
leaks of eventfd ctx"),and since commit 5c5866c593bb ("vfio/pci: Clear
error and request eventfd ctx after releasing"), it's very easily to
trigger the kernel panic like this:
[ 9513.904346] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
[ 9513.913091] Mem abort info:
[ 9513.915871] ESR = 0x96000006
[ 9513.918912] EC = 0x25: DABT (current EL), IL = 32 bits
[ 9513.924198] SET = 0, FnV = 0
[ 9513.927238] EA = 0, S1PTW = 0
[ 9513.930364] Data abort info:
[ 9513.933231] ISV = 0, ISS = 0x00000006
[ 9513.937048] CM = 0, WnR = 0
[ 9513.940003] user pgtable: 4k pages, 48-bit VAs, pgdp=0000007ec7d12000
[ 9513.946414] [0000000000000008] pgd=0000007ec7d13003, p4d=0000007ec7d13003, pud=0000007ec728c003, pmd=0000000000000000
[ 9513.956975] Internal error: Oops: 96000006 [#1] PREEMPT SMP
[ 9513.962521] Modules linked in: vfio_pci vfio_virqfd vfio_iommu_type1 vfio hclge hns3 hnae3 [last unloaded: vfio_pci]
[ 9513.972998] CPU: 4 PID: 1327 Comm: bash Tainted: G W 5.8.0-rc4+ #3
[ 9513.980443] Hardware name: Huawei TaiShan 2280 V2/BC82AMDC, BIOS 2280-V2 CS V3.B270.01 05/08/2020
[ 9513.989274] pstate: 80400089 (Nzcv daIf +PAN -UAO BTYPE=--)
[ 9513.994827] pc : _raw_spin_lock_irqsave+0x48/0x88
[ 9513.999515] lr : eventfd_signal+0x6c/0x1b0
[ 9514.003591] sp : ffff800038a0b960
[ 9514.006889] x29: ffff800038a0b960 x28: ffff007ef7f4da10
[ 9514.012175] x27: ffff207eefbbfc80 x26: ffffbb7903457000
[ 9514.017462] x25: ffffbb7912191000 x24: ffff007ef7f4d400
[ 9514.022747] x23: ffff20be6e0e4c00 x22: 0000000000000008
[ 9514.028033] x21: 0000000000000000 x20: 0000000000000000
[ 9514.033321] x19: 0000000000000008 x18: 0000000000000000
[ 9514.038606] x17: 0000000000000000 x16: ffffbb7910029328
[ 9514.043893] x15: 0000000000000000 x14: 0000000000000001
[ 9514.049179] x13: 0000000000000000 x12: 0000000000000002
[ 9514.054466] x11: 0000000000000000 x10: 0000000000000a00
[ 9514.059752] x9 : ffff800038a0b840 x8 : ffff007ef7f4de60
[ 9514.065038] x7 : ffff007fffc96690 x6 : fffffe01faffb748
[ 9514.070324] x5 : 0000000000000000 x4 : 0000000000000000
[ 9514.075609] x3 : 0000000000000000 x2 : 0000000000000001
[ 9514.080895] x1 : ffff007ef7f4d400 x0 : 0000000000000000
[ 9514.086181] Call trace:
[ 9514.088618] _raw_spin_lock_irqsave+0x48/0x88
[ 9514.092954] eventfd_signal+0x6c/0x1b0
[ 9514.096691] vfio_pci_request+0x84/0xd0 [vfio_pci]
[ 9514.101464] vfio_del_group_dev+0x150/0x290 [vfio]
[ 9514.106234] vfio_pci_remove+0x30/0x128 [vfio_pci]
[ 9514.111007] pci_device_remove+0x48/0x108
[ 9514.115001] device_release_driver_internal+0x100/0x1b8
[ 9514.120200] device_release_driver+0x28/0x38
[ 9514.124452] pci_stop_bus_device+0x68/0xa8
[ 9514.128528] pci_stop_and_remove_bus_device+0x20/0x38
[ 9514.133557] pci_iov_remove_virtfn+0xb4/0x128
[ 9514.137893] sriov_disable+0x3c/0x108
[ 9514.141538] pci_disable_sriov+0x28/0x38
[ 9514.145445] hns3_pci_sriov_configure+0x48/0xb8 [hns3]
[ 9514.150558] sriov_numvfs_store+0x110/0x198
[ 9514.154724] dev_attr_store+0x44/0x60
[ 9514.158373] sysfs_kf_write+0x5c/0x78
[ 9514.162018] kernfs_fop_write+0x104/0x210
[ 9514.166010] __vfs_write+0x48/0x90
[ 9514.169395] vfs_write+0xbc/0x1c0
[ 9514.172694] ksys_write+0x74/0x100
[ 9514.176079] __arm64_sys_write+0x24/0x30
[ 9514.179987] el0_svc_common.constprop.4+0x110/0x200
[ 9514.184842] do_el0_svc+0x34/0x98
[ 9514.188144] el0_svc+0x14/0x40
[ 9514.191185] el0_sync_handler+0xb0/0x2d0
[ 9514.195088] el0_sync+0x140/0x180
[ 9514.198389] Code: b9001020 d2800000 52800022 f9800271 (885ffe61)
[ 9514.204455] ---[ end trace 648de00c8406465f ]---
[ 9514.212308] note: bash[1327] exited with preempt_count 1
Cc: Qian Cai <cai@lca.pw>
Cc: Alex Williamson <alex.williamson@redhat.com>
Fixes: 1518ac272e78 ("vfio/pci: fix memory leaks of eventfd ctx")
Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit 5c5866c593bbd444d0339ede6a8fb5f14ff66d72 ]
The next use of the device will generate an underflow from the
stale reference.
Cc: Qian Cai <cai@lca.pw>
Fixes: 1518ac272e78 ("vfio/pci: fix memory leaks of eventfd ctx")
Reported-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Tested-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit 1518ac272e789cae8c555d69951b032a275b7602 ]
Finished a qemu-kvm (-device vfio-pci,host=0001:01:00.0) triggers a few
memory leaks after a while because vfio_pci_set_ctx_trigger_single()
calls eventfd_ctx_fdget() without the matching eventfd_ctx_put() later.
Fix it by calling eventfd_ctx_put() for those memory in
vfio_pci_release() before vfio_device_release().
unreferenced object 0xebff008981cc2b00 (size 128):
comm "qemu-kvm", pid 4043, jiffies 4294994816 (age 9796.310s)
hex dump (first 32 bytes):
01 00 00 00 6b 6b 6b 6b 00 00 00 00 ad 4e ad de ....kkkk.....N..
ff ff ff ff 6b 6b 6b 6b ff ff ff ff ff ff ff ff ....kkkk........
backtrace:
[<00000000917e8f8d>] slab_post_alloc_hook+0x74/0x9c
[<00000000df0f2aa2>] kmem_cache_alloc_trace+0x2b4/0x3d4
[<000000005fcec025>] do_eventfd+0x54/0x1ac
[<0000000082791a69>] __arm64_sys_eventfd2+0x34/0x44
[<00000000b819758c>] do_el0_svc+0x128/0x1dc
[<00000000b244e810>] el0_sync_handler+0xd0/0x268
[<00000000d495ef94>] el0_sync+0x164/0x180
unreferenced object 0x29ff008981cc4180 (size 128):
comm "qemu-kvm", pid 4043, jiffies 4294994818 (age 9796.290s)
hex dump (first 32 bytes):
01 00 00 00 6b 6b 6b 6b 00 00 00 00 ad 4e ad de ....kkkk.....N..
ff ff ff ff 6b 6b 6b 6b ff ff ff ff ff ff ff ff ....kkkk........
backtrace:
[<00000000917e8f8d>] slab_post_alloc_hook+0x74/0x9c
[<00000000df0f2aa2>] kmem_cache_alloc_trace+0x2b4/0x3d4
[<000000005fcec025>] do_eventfd+0x54/0x1ac
[<0000000082791a69>] __arm64_sys_eventfd2+0x34/0x44
[<00000000b819758c>] do_el0_svc+0x128/0x1dc
[<00000000b244e810>] el0_sync_handler+0xd0/0x268
[<00000000d495ef94>] el0_sync+0x164/0x180
Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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This is the 5.4.64 stable release
Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
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commit ebfa440ce38b7e2e04c3124aa89c8a9f4094cf21 upstream.
SR-IOV VFs do not implement the memory enable bit of the command
register, therefore this bit is not set in config space after
pci_enable_device(). This leads to an unintended difference
between PF and VF in hand-off state to the user. We can correct
this by setting the initial value of the memory enable bit in our
virtualized config space. There's really no need however to
ever fault a user on a VF though as this would only indicate an
error in the user's management of the enable bit, versus a PF
where the same access could trigger hardware faults.
Fixes: abafbc551fdd ("vfio-pci: Invalidate mmaps and block MMIO access on disabled memory")
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit abafbc551fddede3e0a08dee1dcde08fc0eb8476 upstream.
Accessing the disabled memory space of a PCI device would typically
result in a master abort response on conventional PCI, or an
unsupported request on PCI express. The user would generally see
these as a -1 response for the read return data and the write would be
silently discarded, possibly with an uncorrected, non-fatal AER error
triggered on the host. Some systems however take it upon themselves
to bring down the entire system when they see something that might
indicate a loss of data, such as this discarded write to a disabled
memory space.
To avoid this, we want to try to block the user from accessing memory
spaces while they're disabled. We start with a semaphore around the
memory enable bit, where writers modify the memory enable state and
must be serialized, while readers make use of the memory region and
can access in parallel. Writers include both direct manipulation via
the command register, as well as any reset path where the internal
mechanics of the reset may both explicitly and implicitly disable
memory access, and manipulation of the MSI-X configuration, where the
MSI-X vector table resides in MMIO space of the device. Readers
include the read and write file ops to access the vfio device fd
offsets as well as memory mapped access. In the latter case, we make
use of our new vma list support to zap, or invalidate, those memory
mappings in order to force them to be faulted back in on access.
Our semaphore usage will stall user access to MMIO spaces across
internal operations like reset, but the user might experience new
behavior when trying to access the MMIO space while disabled via the
PCI command register. Access via read or write while disabled will
return -EIO and access via memory maps will result in a SIGBUS. This
is expected to be compatible with known use cases and potentially
provides better error handling capabilities than present in the
hardware, while avoiding the more readily accessible and severe
platform error responses that might otherwise occur.
Fixes: CVE-2020-12888
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Ajay Kaher <akaher@vmware.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit 11c4cd07ba111a09f49625f9e4c851d83daf0a22 upstream.
Rather than calling remap_pfn_range() when a region is mmap'd, setup
a vm_ops handler to support dynamic faulting of the range on access.
This allows us to manage a list of vmas actively mapping the area that
we can later use to invalidate those mappings. The open callback
invalidates the vma range so that all tracking is inserted in the
fault handler and removed in the close handler.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Ajay Kaher <akaher@vmware.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit 41311242221e3482b20bfed10fa4d9db98d87016 upstream.
With conversion to follow_pfn(), DMA mapping a PFNMAP range depends on
the range being faulted into the vma. Add support to manually provide
that, in the same way as done on KVM with hva_to_pfn_remapped().
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Ajay Kaher <akaher@vmware.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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This is the 5.4.61 stable release
Conflicts (manual resolve, upstream version taken):
- drivers/xen/swiotlb-xen.c
Port upstream commit cca58a166920a to NXP tree, manual hunk was
resolved during merge.
Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
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[ Upstream commit aae7a75a821a793ed6b8ad502a5890fb8e8f172d ]
The vfio_iommu_replay() function does not currently unwind on error,
yet it does pin pages, perform IOMMU mapping, and modify the vfio_dma
structure to indicate IOMMU mapping. The IOMMU mappings are torn down
when the domain is destroyed, but the other actions go on to cause
trouble later. For example, the iommu->domain_list can be empty if we
only have a non-IOMMU backed mdev attached. We don't currently check
if the list is empty before getting the first entry in the list, which
leads to a bogus domain pointer. If a vfio_dma entry is erroneously
marked as iommu_mapped, we'll attempt to use that bogus pointer to
retrieve the existing physical page addresses.
This is the scenario that uncovered this issue, attempting to hot-add
a vfio-pci device to a container with an existing mdev device and DMA
mappings, one of which could not be pinned, causing a failure adding
the new group to the existing container and setting the conditions
for a subsequent attempt to explode.
To resolve this, we can first check if the domain_list is empty so
that we can reject replay of a bogus domain, should we ever encounter
this inconsistent state again in the future. The real fix though is
to add the necessary unwind support, which means cleaning up the
current pinning if an IOMMU mapping fails, then walking back through
the r-b tree of DMA entries, reading from the IOMMU which ranges are
mapped, and unmapping and unpinning those ranges. To be able to do
this, we also defer marking the DMA entry as IOMMU mapped until all
entries are processed, in order to allow the unwind to know the
disposition of each entry.
Fixes: a54eb55045ae ("vfio iommu type1: Add support for mediated devices")
Reported-by: Zhiyi Guo <zhguo@redhat.com>
Tested-by: Zhiyi Guo <zhguo@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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This is the 5.4.49 stable release
Conflicts (manual resolve, NXP version taken):
sound/soc/fsl/fsl_esai.c
Commit 53057bd4ac84f upstream addresses the problem of endless isr in
case if exception interrupt is enabled and tasklet is scheduled. Since
NXP implementation has tasklet removed with commit 2bbe95fe6c0dd,
upstream fix does not match the main implementation, hence we keep the
NXP version here.
Signed-off-by: Andrey Zhizhikin <andrey.z@gmail.com>
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This is the 5.4.47 stable release
All conflicts resolved in favour of HEAD, i.e. 5.4-2.1.x-imx
Conflicts:
arch/arm/boot/dts/imx6qdl.dtsi
arch/arm/mach-imx/Kconfig
arch/arm/mach-imx/common.h
arch/arm/mach-imx/suspend-imx6.S
arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
arch/powerpc/include/asm/cacheflush.h
drivers/cpufreq/imx6q-cpufreq.c
drivers/dma/imx-sdma.c
drivers/edac/synopsys_edac.c
drivers/firmware/imx/imx-scu.c
drivers/net/ethernet/freescale/fec.h
drivers/net/ethernet/freescale/fec_main.c
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
drivers/net/phy/phy_device.c
drivers/perf/fsl_imx8_ddr_perf.c
drivers/usb/cdns3/gadget.c
drivers/usb/dwc3/gadget.c
include/uapi/linux/dma-buf.h
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
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[ Upstream commit aa8ba13cae3134b8ef1c1b6879f66372531da738 ]
kobject_init_and_add() takes reference even when it fails.
If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object. Thus,
replace kfree() by kobject_put() to fix this issue. Previous
commit "b8eb718348b8" fixed a similar problem.
Fixes: 7b96953bc640 ("vfio: Mediated device Core driver")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit bc138db1b96264b9c1779cf18d5a3b186aa90066 ]
The PCI Code and ID Assignment Specification changed capability ID 0
from reserved to a NULL capability in the v1.1 revision. The NULL
capability is defined to include only the 16-bit capability header,
ie. only the ID and next pointer. Unfortunately vfio-pci creates a
map of config space, where ID 0 is used to reserve the standard type
0 header. Finding an actual capability with this ID therefore results
in a bogus range marked in that map and conflicts with subsequent
capabilities. As this seems to be a dummy capability anyway and we
already support dropping capabilities, let's hide this one rather than
delving into the potentially subtle dependencies within our map.
Seen on an NVIDIA Tesla T4.
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit 3e63b94b6274324ff2e7d8615df31586de827c4e ]
vfio_pci_disable() calls vfio_config_free() but forgets to call
free_perm_bits() resulting in memory leaks,
unreferenced object 0xc000000c4db2dee0 (size 16):
comm "qemu-kvm", pid 4305, jiffies 4295020272 (age 3463.780s)
hex dump (first 16 bytes):
00 00 ff 00 ff ff ff ff ff ff ff ff ff ff 00 00 ................
backtrace:
[<00000000a6a4552d>] alloc_perm_bits+0x58/0xe0 [vfio_pci]
[<00000000ac990549>] vfio_config_init+0xdf0/0x11b0 [vfio_pci]
init_pci_cap_msi_perm at drivers/vfio/pci/vfio_pci_config.c:1125
(inlined by) vfio_msi_cap_len at drivers/vfio/pci/vfio_pci_config.c:1180
(inlined by) vfio_cap_len at drivers/vfio/pci/vfio_pci_config.c:1241
(inlined by) vfio_cap_init at drivers/vfio/pci/vfio_pci_config.c:1468
(inlined by) vfio_config_init at drivers/vfio/pci/vfio_pci_config.c:1707
[<000000006db873a1>] vfio_pci_open+0x234/0x700 [vfio_pci]
[<00000000630e1906>] vfio_group_fops_unl_ioctl+0x8e0/0xb84 [vfio]
[<000000009e34c54f>] ksys_ioctl+0xd8/0x130
[<000000006577923d>] sys_ioctl+0x28/0x40
[<000000006d7b1cf2>] system_call_exception+0x114/0x1e0
[<0000000008ea7dd5>] system_call_common+0xf0/0x278
unreferenced object 0xc000000c4db2e330 (size 16):
comm "qemu-kvm", pid 4305, jiffies 4295020272 (age 3463.780s)
hex dump (first 16 bytes):
00 ff ff 00 ff ff ff ff ff ff ff ff ff ff 00 00 ................
backtrace:
[<000000004c71914f>] alloc_perm_bits+0x44/0xe0 [vfio_pci]
[<00000000ac990549>] vfio_config_init+0xdf0/0x11b0 [vfio_pci]
[<000000006db873a1>] vfio_pci_open+0x234/0x700 [vfio_pci]
[<00000000630e1906>] vfio_group_fops_unl_ioctl+0x8e0/0xb84 [vfio]
[<000000009e34c54f>] ksys_ioctl+0xd8/0x130
[<000000006577923d>] sys_ioctl+0x28/0x40
[<000000006d7b1cf2>] system_call_exception+0x114/0x1e0
[<0000000008ea7dd5>] system_call_common+0xf0/0x278
Fixes: 89e1f7d4c66d ("vfio: Add PCI device driver")
Signed-off-by: Qian Cai <cai@lca.pw>
[aw: rolled in follow-up patch]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit 5cbf3264bc715e9eb384e2b68601f8c02bb9a61d upstream.
Use follow_pfn() to get the PFN of a PFNMAP VMA instead of assuming that
vma->vm_pgoff holds the base PFN of the VMA. This fixes a bug where
attempting to do VFIO_IOMMU_MAP_DMA on an arbitrary PFNMAP'd region of
memory calculates garbage for the PFN.
Hilariously, this only got detected because the first "PFN" calculated
by vaddr_get_pfn() is PFN 0 (vma->vm_pgoff==0), and iommu_iova_to_phys()
uses PA==0 as an error, which triggers a WARN in vfio_unmap_unpin()
because the translation "failed". PFN 0 is now unconditionally reserved
on x86 in order to mitigate L1TF, which causes is_invalid_reserved_pfn()
to return true and in turns results in vaddr_get_pfn() returning success
for PFN 0. Eventually the bogus calculation runs into PFNs that aren't
reserved and leads to failure in vfio_pin_map_dma(). The subsequent
call to vfio_remove_dma() attempts to unmap PFN 0 and WARNs.
WARNING: CPU: 8 PID: 5130 at drivers/vfio/vfio_iommu_type1.c:750 vfio_unmap_unpin+0x2e1/0x310 [vfio_iommu_type1]
Modules linked in: vfio_pci vfio_virqfd vfio_iommu_type1 vfio ...
CPU: 8 PID: 5130 Comm: sgx Tainted: G W 5.6.0-rc5-705d787c7fee-vfio+ #3
Hardware name: Intel Corporation Mehlow UP Server Platform/Moss Beach Server, BIOS CNLSE2R1.D00.X119.B49.1803010910 03/01/2018
RIP: 0010:vfio_unmap_unpin+0x2e1/0x310 [vfio_iommu_type1]
Code: <0f> 0b 49 81 c5 00 10 00 00 e9 c5 fe ff ff bb 00 10 00 00 e9 3d fe
RSP: 0018:ffffbeb5039ebda8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9a55cbf8d480 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff9a52b771c200
RBP: 0000000000000000 R08: 0000000000000040 R09: 00000000fffffff2
R10: 0000000000000001 R11: ffff9a51fa896000 R12: 0000000184010000
R13: 0000000184000000 R14: 0000000000010000 R15: ffff9a55cb66ea08
FS: 00007f15d3830b40(0000) GS:ffff9a55d5600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561cf39429e0 CR3: 000000084f75f005 CR4: 00000000003626e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vfio_remove_dma+0x17/0x70 [vfio_iommu_type1]
vfio_iommu_type1_ioctl+0x9e3/0xa7b [vfio_iommu_type1]
ksys_ioctl+0x92/0xb0
__x64_sys_ioctl+0x16/0x20
do_syscall_64+0x4c/0x180
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f15d04c75d7
Code: <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 f7 d8 64 89 01 48
Fixes: 73fa0d10d077 ("vfio: Type1 IOMMU implementation")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0ea971f8dcd6dee78a9a30ea70227cf305f11ff7 upstream.
add parentheses to avoid possible vaddr overflow.
Fixes: a54eb55045ae ("vfio iommu type1: Add support for mediated devices")
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 723fe298ad85ad1278bd2312469ad14738953cc6 upstream.
Since commit 7723f4c5ecdb ("driver core: platform: Add an error
message to platform_get_irq*()"), platform_get_irq() calls dev_err()
on an error. As we enumerate all interrupts until platform_get_irq()
fails, we now systematically get a message such as:
"vfio-platform fff51000.ethernet: IRQ index 3 not found" which is
a false positive.
Let's use platform_get_irq_optional() instead.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Cc: stable@vger.kernel.org # v5.3+
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge Linux stable release v5.4.24 into imx_5.4.y
* tag 'v5.4.24': (3306 commits)
Linux 5.4.24
blktrace: Protect q->blk_trace with RCU
kvm: nVMX: VMWRITE checks unsupported field before read-only field
...
Signed-off-by: Jason Liu <jason.hui.liu@nxp.com>
Conflicts:
arch/arm/boot/dts/imx6sll-evk.dts
arch/arm/boot/dts/imx7ulp.dtsi
arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
drivers/clk/imx/clk-composite-8m.c
drivers/gpio/gpio-mxc.c
drivers/irqchip/Kconfig
drivers/mmc/host/sdhci-of-esdhc.c
drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
drivers/net/can/flexcan.c
drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
drivers/net/ethernet/mscc/ocelot.c
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
drivers/net/phy/realtek.c
drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
drivers/perf/fsl_imx8_ddr_perf.c
drivers/tee/optee/shm_pool.c
drivers/usb/cdns3/gadget.c
kernel/sched/cpufreq.c
net/core/xdp.c
sound/soc/fsl/fsl_esai.c
sound/soc/fsl/fsl_sai.c
sound/soc/sof/core.c
sound/soc/sof/imx/Kconfig
sound/soc/sof/loader.c
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[ Upstream commit 338b4e10f939a71194d8ecef7ece205a942cec05 ]
The nvlink2 subdriver for IBM Witherspoon machines preregisters
GPU memory in the IOMMI API so KVM TCE code can map this memory
for DMA as well. This is done by mm_iommu_newdev() called from
vfio_pci_nvgpu_regops::mmap.
In an unlikely event of failure the data->mem remains NULL and
since mm_iommu_put() (which unregisters the region and unpins memory
if that was regular memory) does not expect mem=NULL, it should not be
called.
This adds a check to only call mm_iommu_put() for a valid data->mem.
Fixes: 7f92891778df ("vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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commit d567fb8819162099035e546b11a736e29c2af0ea upstream.
Since irq_bypass_register_producer() is called after request_irq(), we
should do tear-down in reverse order: irq_bypass_unregister_producer()
then free_irq().
Specifically free_irq() may release resources required by the
irqbypass del_producer() callback. Notably an example provided by
Marc Zyngier on arm64 with GICv4 that he indicates has the potential
to wedge the hardware:
free_irq(irq)
__free_irq(irq)
irq_domain_deactivate_irq(irq)
its_irq_domain_deactivate()
[unmap the VLPI from the ITS]
kvm_arch_irq_bypass_del_producer(cons, prod)
kvm_vgic_v4_unset_forwarding(kvm, irq, ...)
its_unmap_vlpi(irq)
[Unmap the VLPI from the ITS (again), remap the original LPI]
Signed-off-by: Jiang Yi <giangyi@amazon.com>
Cc: stable@vger.kernel.org # v4.4+
Fixes: 6d7425f109d26 ("vfio: Register/unregister irq_bypass_producer")
Link: https://lore.kernel.org/kvm/20191127164910.15888-1-giangyi@amazon.com
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
[aw: commit log]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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firmware
There are some VFIO regions which are cacheable (QMAN CENA region).
These regions should be mapped cacheable.
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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This patch adds support to read and write ioctls for
fsl-mc devices. Only read-write to DPRC/DPMCP devices
are supported while read writes on other fsl-mc devices
is not supported by this patch.
Also current patch limits userspace to write complete
64byte command once and read 64byte response by one ioctl.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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This patch allows to set an eventfd for fsl-mc device interrupt
and also to trigger the interrupt eventfd from userspace for testing.
All fsl-mc device interrupts are MSI type. This does not yet handle
correctly DPRC container interrupt where re-scanning on container is
required.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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This patch adds the skeleton for interrupt support
for fsl-mc devices. The interrupts are not yet functional,
the functionality will be added by subsequent patches.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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All the devices in a DPRC share the same pool of interrupts.
Because of this the access to the pool of interrupts must be
protected with a lock. Extend the current lock implementation
to have a lock per DPRC.
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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Allow userspace to mmap device regions for direct access of
fsl-mc devices.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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Expose to userspace information about the memory regions.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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Allow userspace to get fsl-mc device info (number of regions
and irqs).
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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The DPRC(Data Path Resource Container) device is a bus device and has
child devices attached to it. When the vfio-fsl-mc driver is probed
the DPRC is scanned and the child devices discovered and initialized.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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This patch adds the infrastructure for VFIO support for fsl-mc
devices. Subsequent patches will add support for binding and secure
assigning these devices using VFIO.
FSL-MC is a new bus (driver/bus/fsl-mc/) which is different
from PCI and Platform bus.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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After enabling CONFIG_IOMMU_DMA on X86 a new warning appears when
compiling vfio:
drivers/vfio/vfio_iommu_type1.c: In function ‘vfio_iommu_type1_attach_group’:
drivers/vfio/vfio_iommu_type1.c:1827:7: warning: ‘resv_msi_base’ may be used uninitialized in this function [-Wmaybe-uninitialized]
ret = iommu_get_msi_cookie(domain->domain, resv_msi_base);
~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The warning is a false positive, because the call to iommu_get_msi_cookie()
only happens when vfio_iommu_has_sw_msi() returned true. And that only
happens when it also set resv_msi_base.
But initialize the variable anyway to get rid of the warning.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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This patch is a part of a series that extends kernel ABI to allow to pass
tagged user pointers (with the top byte set to something else other than
0x00) as syscall arguments.
vaddr_get_pfn() uses provided user pointers for vma lookups, which can
only by done with untagged pointers.
Untag user pointers in this function.
Link: http://lkml.kernel.org/r/87422b4d72116a975896f2b19b00f38acbd28f33.1563904656.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Replace PAGE_SHIFT + compound_order(page) with the new page_shift()
function. Minor improvements in readability.
[akpm@linux-foundation.org: fix build in tce_page_is_contained()]
Link: http://lkml.kernel.org/r/201907241853.yNQTrJWd%25lkp@intel.com
Link: http://lkml.kernel.org/r/20190721104612.19120-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull VFIO updates from Alex Williamson:
- Fix spapr iommu error case case (Alexey Kardashevskiy)
- Consolidate region type definitions (Cornelia Huck)
- Restore saved original PCI state on release (hexin)
- Simplify mtty sample driver interrupt path (Parav Pandit)
- Support for reporting valid IOVA regions to user (Shameer Kolothum)
* tag 'vfio-v5.4-rc1' of git://github.com/awilliam/linux-vfio:
vfio_pci: Restore original state on release
vfio/type1: remove duplicate retrieval of reserved regions
vfio/type1: Add IOVA range capability support
vfio/type1: check dma map request is within a valid iova range
vfio/spapr_tce: Fix incorrect tce_iommu_group memory free
vfio-mdev/mtty: Simplify interrupt generation
vfio: re-arrange vfio region definitions
vfio/type1: Update iova list on detach
vfio/type1: Check reserved region conflict and update iova list
vfio/type1: Introduce iova list and add iommu aperture validity check
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
"This is a bit late, partly due to me travelling, and partly due to a
power outage knocking out some of my test systems *while* I was
travelling.
- Initial support for running on a system with an Ultravisor, which
is software that runs below the hypervisor and protects guests
against some attacks by the hypervisor.
- Support for building the kernel to run as a "Secure Virtual
Machine", ie. as a guest capable of running on a system with an
Ultravisor.
- Some changes to our DMA code on bare metal, to allow devices with
medium sized DMA masks (> 32 && < 59 bits) to use more than 2GB of
DMA space.
- Support for firmware assisted crash dumps on bare metal (powernv).
- Two series fixing bugs in and refactoring our PCI EEH code.
- A large series refactoring our exception entry code to use gas
macros, both to make it more readable and also enable some future
optimisations.
As well as many cleanups and other minor features & fixups.
Thanks to: Adam Zerella, Alexey Kardashevskiy, Alistair Popple, Andrew
Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Anshuman Khandual,
Balbir Singh, Benjamin Herrenschmidt, Cédric Le Goater, Christophe
JAILLET, Christophe Leroy, Christopher M. Riedl, Christoph Hellwig,
Claudio Carvalho, Daniel Axtens, David Gibson, David Hildenbrand,
Desnes A. Nunes do Rosario, Ganesh Goudar, Gautham R. Shenoy, Greg
Kurz, Guerney Hunt, Gustavo Romero, Halil Pasic, Hari Bathini, Joakim
Tjernlund, Jonathan Neuschafer, Jordan Niethe, Leonardo Bras, Lianbo
Jiang, Madhavan Srinivasan, Mahesh Salgaonkar, Mahesh Salgaonkar,
Masahiro Yamada, Maxiwell S. Garcia, Michael Anderson, Nathan
Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Oliver
O'Halloran, Qian Cai, Ram Pai, Ravi Bangoria, Reza Arbab, Ryan Grimm,
Sam Bobroff, Santosh Sivaraj, Segher Boessenkool, Sukadev Bhattiprolu,
Thiago Bauermann, Thiago Jung Bauermann, Thomas Gleixner, Tom
Lendacky, Vasant Hegde"
* tag 'powerpc-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (264 commits)
powerpc/mm/mce: Keep irqs disabled during lockless page table walk
powerpc: Use ftrace_graph_ret_addr() when unwinding
powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
ftrace: Look up the address of return_to_handler() using helpers
powerpc: dump kernel log before carrying out fadump or kdump
docs: powerpc: Add missing documentation reference
powerpc/xmon: Fix output of XIVE IPI
powerpc/xmon: Improve output of XIVE interrupts
powerpc/mm/radix: remove useless kernel messages
powerpc/fadump: support holes in kernel boot memory area
powerpc/fadump: remove RMA_START and RMA_END macros
powerpc/fadump: update documentation about option to release opalcore
powerpc/fadump: consider f/w load area
powerpc/opalcore: provide an option to invalidate /sys/firmware/opal/core file
powerpc/opalcore: export /sys/firmware/opal/core for analysing opal crashes
powerpc/fadump: update documentation about CONFIG_PRESERVE_FA_DUMP
powerpc/fadump: add support to preserve crash data on FADUMP disabled kernel
powerpc/fadump: improve how crashed kernel's memory is reserved
powerpc/fadump: consider reserved ranges while releasing memory
powerpc/fadump: make crash memory ranges array allocation generic
...
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Invalidating a TCE cache entry for each updated TCE is quite expensive.
This makes use of the new iommu_table_ops::xchg_no_kill()/tce_kill()
callbacks to bring down the time spent in mapping a huge guest DMA window.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190829085252.72370-4-aik@ozlabs.ru
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'v5.4/vfio/connie-re-arrange-v2', 'v5.4/vfio/hexin-pci-reset-v3', 'v5.4/vfio/parav-mtty-uuid-v2' and 'v5.4/vfio/shameer-iova-list-v8' into v5.4/vfio/next
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vfio_pci_enable() saves the device's initial configuration information
with the intent that it is restored in vfio_pci_disable(). However,
the commit referenced in Fixes: below replaced the call to
__pci_reset_function_locked(), which is not wrapped in a state save
and restore, with pci_try_reset_function(), which overwrites the
restored device state with the current state before applying it to the
device. Reinstate use of __pci_reset_function_locked() to return to
the desired behavior.
Fixes: 890ed578df82 ("vfio-pci: Use pci "try" reset interface")
Signed-off-by: hexin <hexin15@baidu.com>
Signed-off-by: Liu Qi <liuqi16@baidu.com>
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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As we now already have the reserved regions list, just pass that into
vfio_iommu_has_sw_msi() fn.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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This allows the user-space to retrieve the supported IOVA
range(s), excluding any non-relaxable reserved regions. The
implementation is based on capability chains, added to
VFIO_IOMMU_GET_INFO ioctl.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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This checks and rejects any dma map request outside valid iova
range.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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The @tcegrp variable is used in 1) a loop over attached groups
2) it stores a pointer to a newly allocated tce_iommu_group if 1) found
nothing. However the error handler does not distinguish how we got there
and incorrectly releases memory for a found+incompatible group.
This fixes it by adding another error handling case.
Fixes: 0bd971676e68 ("powerpc/powernv/npu: Add compound IOMMU groups")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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Get a copy of iova list on _group_detach and try to update the list.
On success replace the current one with the copy. Leave the list as
it is if update fails.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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This retrieves the reserved regions associated with dev group and
checks for conflicts with any existing dma mappings. Also update
the iova list excluding the reserved regions.
Reserved regions with type IOMMU_RESV_DIRECT_RELAXABLE are
excluded from above checks as they are considered as directly
mapped regions which are known to be relaxable.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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