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Hou Zhiqiang 6d16d35fad PCI: endpoint: Fix alignment fault error in copy tests [ Upstream commit `829cc0e2ea` ] The copy test uses the memcpy() to copy data between IO memory spaces. This can trigger an alignment fault error (pasted the error logs below) because memcpy() may use unaligned accesses on a mapped memory that is just IO, which does not support unaligned memory accesses. Fix it by using the correct memcpy API to copy from/to IO memory. Alignment fault error logs: Unable to handle kernel paging request at virtual address ffff8000101cd3c1 Mem abort info: ESR = 0x96000021 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x21: alignment fault Data abort info: ISV = 0, ISS = 0x00000021 CM = 0, WnR = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000081773000 [ffff8000101cd3c1] pgd=1000000082410003, p4d=1000000082410003, pud=1000000082411003, pmd=1000000082412003, pte=0068004000001f13 Internal error: Oops: 96000021 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6 Comm: kworker/0:0H Not tainted 5.15.0-rc1-next-20210914-dirty #2 Hardware name: LS1012A RDB Board (DT) Workqueue: kpcitest pci_epf_test_cmd_handler pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __memcpy+0x168/0x230 lr : pci_epf_test_cmd_handler+0x6f0/0xa68 sp : ffff80001003bce0 x29: ffff80001003bce0 x28: ffff800010135000 x27: ffff8000101e5000 x26: ffff8000101cd000 x25: ffff6cda941cf6c8 x24: 0000000000000000 x23: ffff6cda863f2000 x22: ffff6cda9096c800 x21: ffff800010135000 x20: ffff6cda941cf680 x19: ffffaf39fd999000 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: ffffaf39fd2b6000 x14: 0000000000000000 x13: 15f5c8fa2f984d57 x12: 604d132b60275454 x11: 065cee5e5fb428b6 x10: aae662eb17d0cf3e x9 : 1d97c9a1b4ddef37 x8 : 7541b65edebf928c x7 : e71937c4fc595de0 x6 : b8a0e09562430d1c x5 : ffff8000101e5401 x4 : ffff8000101cd401 x3 : ffff8000101e5380 x2 : fffffffffffffff1 x1 : ffff8000101cd3c0 x0 : ffff8000101e5000 Call trace: __memcpy+0x168/0x230 process_one_work+0x1ec/0x370 worker_thread+0x44/0x478 kthread+0x154/0x160 ret_from_fork+0x10/0x20 Code: a984346c a9c4342c f1010042 54fffee8 (a97c3c8e) ---[ end trace 568c28c7b6336335 ]--- Link: https://lore.kernel.org/r/20211217094708.28678-1-Zhiqiang.Hou@nxp.com Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-13 19:27:14 +02:00
arch	KVM: arm64: Do not change the PMU event filter after a VCPU has run	2022-04-13 19:27:13 +02:00
block	block: restore the old set_task_ioprio() behaviour wrt PF_EXITING	2022-04-08 13:58:57 +02:00
certs	certs: Fix build error when CONFIG_MODULE_SIG_KEY is empty	2022-01-23 00:08:44 +09:00
crypto	crypto: xts - Add softdep on ecb	2022-04-08 13:58:36 +02:00
Documentation	KVM: arm64: Do not change the PMU event filter after a VCPU has run	2022-04-13 19:27:13 +02:00
drivers	PCI: endpoint: Fix alignment fault error in copy tests	2022-04-13 19:27:14 +02:00
fs	coredump: Use the vma snapshot in fill_files_note	2022-04-08 13:59:04 +02:00
include	net: initialize init_net earlier	2022-04-13 19:27:12 +02:00
init	net: initialize init_net earlier	2022-04-13 19:27:12 +02:00
ipc	ipc/sem: do not sleep with a spin lock held	2022-02-04 09:25:05 -08:00
kernel	bpf: Adjust BPF stack helper functions to accommodate skip > 0	2022-04-08 13:59:00 +02:00
lib	ref_tracker: implement use-after-free detection	2022-04-13 19:27:12 +02:00
LICENSES	LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers	2021-12-16 14:33:10 +01:00
mm	mm: kfence: fix objcgs vector allocation	2022-04-13 19:27:07 +02:00
net	net: initialize init_net earlier	2022-04-13 19:27:12 +02:00
samples	samples/bpf, xdpsock: Fix race when running for fix duration of time	2022-04-08 13:58:18 +02:00
scripts	modpost: restore the warning message for missing symbol versions	2022-04-08 13:58:54 +02:00
security	Fix incorrect type in assignment of ipv6 port for audit	2022-04-08 13:58:37 +02:00
sound	ASoC: topology: Allow TLV control to be either read or write	2022-04-08 13:59:02 +02:00
tools	libbpf: Fix accessing the first syscall argument on s390	2022-04-13 19:27:14 +02:00
usr	kbuild: remove include/linux/cyclades.h from header file check	2022-01-27 08:51:08 +01:00
virt	KVM: avoid double put_page with gfn-to-pfn cache	2022-04-08 13:58:52 +02:00
.clang-format	genirq/msi: Make interrupt allocation less convoluted	2021-12-16 22:22:20 +01:00
.cocciconfig
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	.gitignore: ignore only top-level modules.builtin	2021-05-02 00:43:35 +09:00
.mailmap	MAINTAINERS: Update Jisheng's email address	2022-03-08 17:30:32 +01:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: replace a Microchip AT91 maintainer	2022-02-09 11:30:01 +01:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	net: dsa: realtek-smi: move to subdirectory	2022-04-08 13:58:12 +02:00
Makefile	Linux 5.17.2	2022-04-08 13:59:05 +02:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.