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f839e5f1ce
linux/arch/parisc/kernel
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John David Anglin f839e5f1ce parisc: Fix non-access data TLB cache flush faults 
When a page is not present, we get non-access data TLB faults from
the fdc and fic instructions in flush_user_dcache_range_asm and
flush_user_icache_range_asm. When these occur, the cache line is
not invalidated and potentially we get memory corruption. The
problem was hidden by the nullification of the flush instructions.

These faults also affect performance. With pa8800/pa8900 processors,
there will be 32 faults per 4 KB page since the cache line is 128
bytes.  There will be more faults with earlier processors.

The problem is fixed by using flush_cache_pages(). It does the flush
using a tmp alias mapping.

The flush_cache_pages() call in flush_cache_range() flushed too
large a range.

V2: Remove unnecessary preempt_disable() and preempt_enable() calls.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
2022-03-11 19:48:06 +01:00
..
syscalls mm/mempolicy: wire up syscall set_mempolicy_home_node 2022-01-15 16:30:30 +02:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
alternative.c parisc: Refactor alternative code to accept multiple conditions 2020-04-05 22:50:40 +02:00
asm-offsets.c parisc: Enable TOC (transfer of contents) feature unconditionally 2022-01-11 11:57:37 +01:00
audit.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
cache.c parisc: Fix non-access data TLB cache flush faults 2022-03-11 19:48:06 +01:00
compat_audit.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
drivers.c bus: Make remove callback return void 2021-07-21 11:53:42 +02:00
entry.S parisc: Convert PTE lookup to use extru_safe() macro 2021-11-22 07:37:31 +01:00
firmware.c parisc/firmware: add functions to retrieve TOC data 2021-11-01 07:35:59 +01:00
ftrace.c Tracing updates for 5.16: 2021-11-01 20:05:19 -07:00
hardware.c parisc: hardware: Update references to parisc website 2020-06-01 23:02:39 +02:00
head.S parisc: Move thread_info into task struct 2021-11-01 07:35:59 +01:00
hpmc.S parisc: Re-use toc_stack as hpmc_stack 2022-01-11 11:57:37 +01:00
inventory.c parisc: Add qemu fw_cfg interface 2020-10-15 08:10:37 +02:00
irq.c parisc: Move thread_info into task struct 2021-11-01 07:35:59 +01:00
jump_label.c parisc: Add static branch and JUMP_LABEL feature 2019-05-06 00:10:03 +02:00
kexec_file.c parisc: add support for kexec_file_load() syscall 2019-09-08 15:41:46 +02:00
kexec.c parisc: add support for kexec_file_load() syscall 2019-09-08 15:41:46 +02:00
kgdb.c parisc: Add kgdb io_module to read chars via PDC 2022-01-07 01:29:22 +01:00
kprobes.c kprobes: treewide: Make it harder to refer kretprobe_trampoline directly 2021-09-30 21:24:06 -04:00
Makefile parisc: Enable TOC (transfer of contents) feature unconditionally 2022-01-11 11:57:37 +01:00
module.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
pa7300lc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pacache.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
parisc_ksyms.c parisc: Drop strnlen_user() in favour of generic version 2021-09-09 12:44:30 +02:00
patch.c parisc: add spinlock to patch function 2019-06-08 12:56:26 +02:00
pci-dma.c parisc: pci-dma: fix warning unused-function 2020-12-15 05:41:11 +01:00
pci.c parisc: Drop comments which are already in pci.h 2019-09-05 16:41:11 +02:00
pdc_chassis.c kernel.h: split out panic and oops helpers 2021-07-01 11:06:04 -07:00
pdc_cons.c tty: pdc_cons, free tty_driver upon failure 2021-07-27 12:17:21 +02:00
pdt.c parisc: Make use of the helper macro kthread_run() 2021-11-01 07:36:01 +01:00
perf_asm.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
perf_images.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
perf.c parisc/perf: open access for CAP_PERFMON privileged process 2020-04-16 12:19:08 -03:00
process.c parisc architecture updates for kernel v5.16-rc1 2021-11-01 16:51:13 -07:00
processor.c parisc: Drop loops_per_jiffy from per_cpu struct 2020-11-11 14:57:30 +01:00
ptrace.c arch/parisc/kernel: remove duplicate include in ptrace 2021-03-04 09:12:29 +01:00
real2.S parisc: Fix and improve kernel stack unwinding 2018-08-13 09:54:17 +02:00
relocate_kernel.S parisc: add kexec syscall support 2019-09-08 15:37:04 +02:00
setup.c parisc: Autodetect default output device and set console= kernel parameter 2022-01-20 20:39:19 +01:00
signal32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
signal32.h Revert "parisc: Reduce sigreturn trampoline to 3 instructions" 2021-11-18 09:02:32 +01:00
signal.c Revert "parisc: Reduce sigreturn trampoline to 3 instructions" 2021-11-18 09:02:32 +01:00
smp.c parisc: move CPU field back into thread_info 2021-11-04 11:21:47 +01:00
stacktrace.c parisc: Fix implicit declaration of function '__kernel_text_address' 2021-11-13 22:10:56 +01:00
sys_parisc32.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sys_parisc.c parisc: enhance warning regarding usage of O_NONBLOCK 2021-11-01 07:36:00 +01:00
syscall.S parisc: Add lws_atomic_xchg and lws_atomic_store syscalls 2022-01-07 01:29:21 +01:00
time.c parisc: Mark cr16 CPU clocksource unstable on all SMP machines 2021-12-04 21:36:04 +01:00
toc_asm.S parisc: Enable TOC (transfer of contents) feature unconditionally 2022-01-11 11:57:37 +01:00
toc.c parisc: Fix missing prototype for 'toc_intr' warning in toc.c 2022-01-20 20:39:19 +01:00
topology.c parisc: Add CPU topology support 2017-11-17 15:27:22 +01:00
traps.c Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
unaligned.c parisc/unaligned: Fix ldw() and stw() unalignment handlers 2022-02-23 18:01:06 +01:00
unwind.c parisc: Move thread_info into task struct 2021-11-01 07:35:59 +01:00
vmlinux.lds.S Revert "parisc: Fix backtrace to always include init funtion names" 2021-11-22 07:37:31 +01:00