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linux/arch/parisc/include/asm
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John David Anglin 2de8b4cc20 parisc: Rewrite cache flush code for PA8800/PA8900 
Originally, I was convinced that we needed to use tmpalias flushes
everwhere, for both user and kernel flushes. However, when I modified
flush_kernel_dcache_page_addr, to use a tmpalias flush, my c8000
would crash quite early when booting.

The PDC returns alias values of 0 for the icache and dcache. This
indicates that either the alias boundary is greater than 16MB or
equivalent aliasing doesn't work. I modified the tmpalias code to
make it easy to try alternate boundaries. I tried boundaries up to
128MB but still kernel tmpalias flushes didn't work on c8000.

This led me to conclude that tmpalias flushes don't work on PA8800
and PA8900 machines, and that we needed to flush directly using the
virtual address of user and kernel pages. This is likely the major
cause of instability on the c8000 and rp34xx machines.

Flushing user pages requires doing a temporary context switch as we
have to flush pages that don't belong to the current context. Further,
we have to deal with pages that aren't present. If a page isn't
present, the flush instructions fault on every line.

Other code has been rearranged and simplified based on testing. For
example, I introduced a flush_cache_dup_mm routine. flush_cache_mm
and flush_cache_dup_mm differ in that flush_cache_mm calls
purge_cache_pages and flush_cache_dup_mm calls flush_cache_pages.
In some implementations, pdc is more efficient than fdc. Based on
my testing, I don't believe there's any performance benefit on the
c8000.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
 		2022-05-17 21:52:47 +02:00
..
Kbuild parisc: syscalls: switch to generic syscalltbl.sh 2021-04-27 09:43:56 +02:00
agp.h agp: define proper stubs for empty helpers 2022-01-29 22:24:25 +01:00
alternative.h parisc: Add ALTERNATIVE_CODE() and ALT_COND_RUN_ON_QEMU 2019-08-12 19:17:39 +02:00
asm-offsets.h
…
asmregs.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153 2019-05-30 11:26:32 -07:00
assembly.h parisc: Add defines for various space register 2022-03-11 19:49:30 +01:00
atomic.h locking/atomic: parisc: move to ARCH_ATOMIC 2021-05-26 13:20:51 +02:00
barrier.h parisc: Add alternative patching to synchronize_caches define 2020-10-15 08:10:38 +02:00
bitops.h parisc: Show error if wrong 32/64-bit compiler is being used 2022-02-13 22:45:53 +01:00
bug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bugs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cache.h parisc: Use constants to encode the space registers like SR_KERNEL 2022-03-11 19:49:31 +01:00
cacheflush.h parisc: Rewrite cache flush code for PA8800/PA8900 2022-05-17 21:52:47 +02:00
checksum.h saner calling conventions for csum_and_copy_..._user() 2020-08-20 15:45:15 -04:00
cmpxchg.h locking/atomic: parisc: move to ARCH_ATOMIC 2021-05-26 13:20:51 +02:00
compat.h arch: remove compat_alloc_user_space 2021-09-08 15:32:35 -07:00
compat_ucontext.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
current.h parisc: Reduce code size by optimizing get_current() function calls 2022-03-11 19:49:31 +01:00
delay.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma-mapping.h parisc: move internal implementation details out of <asm/dma-mapping.h> 2019-02-21 20:37:11 +01:00
dma.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dwarf.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
eisa_bus.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
eisa_eeprom.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
elf.h parisc: Add vDSO support 2022-03-11 19:49:30 +01:00
fb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fixmap.h parisc: add kexec syscall support 2019-09-08 15:37:04 +02:00
floppy.h floppy: use symbolic register names in the parisc port 2020-05-12 19:34:53 +03:00
ftrace.h parisc/ftrace: Add ARCH_SUPPORTS_FTRACE_OPS support 2019-08-03 08:56:57 +02:00
futex.h uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
grfioctl.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hardirq.h softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig 2021-02-10 23:34:16 +01:00
hardware.h parisc: Use per-pagetable spinlock 2019-05-03 23:47:41 +02:00
hash.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hugetlb.h mm/hugetlb: define a generic fallback for arch_clear_hugepage_flags() 2020-06-03 20:09:46 -07:00
ide.h parisc: Drop ifdef __KERNEL__ from non-uapi kernel headers 2021-11-01 07:36:00 +01:00
io.h parisc: io: Improve the outb(), outw() and outl() macros 2022-01-07 01:29:22 +01:00
irq.h parisc: Remove leftover reference to the power_tasklet 2021-01-26 19:57:26 +01:00
irqflags.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
jump_label.h parisc: Include stringify.h to avoid build error in crypto/api.c 2021-11-18 09:01:36 +01:00
kbdleds.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kexec.h parisc: fix compilation when KEXEC=n and KEXEC_FILE=y 2019-12-15 21:05:38 +01:00
kfence.h parisc: Add KFENCE support 2021-10-30 23:11:00 +02:00
kgdb.h parisc: add KGDB support 2019-05-03 23:47:38 +02:00
kprobes.h parisc: Avoid using hardware single-step in kprobes 2022-03-18 09:10:14 +01:00
ldcw.h treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
led.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
linkage.h parisc: Fix boot failure of 64-bit kernel 2018-08-21 14:32:44 +02:00
machdep.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mckinley.h parisc: Drop ifdef __KERNEL__ from non-uapi kernel headers 2021-11-01 07:36:00 +01:00
mmu.h parisc: Add vDSO support 2022-03-11 19:49:30 +01:00
mmu_context.h parisc: Use constants to encode the space registers like SR_KERNEL 2022-03-11 19:49:31 +01:00
mmzone.h parisc: Switch from DISCONTIGMEM to SPARSEMEM 2019-05-03 23:47:40 +02:00
module.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
page.h parisc: Rewrite cache flush code for PA8800/PA8900 2022-05-17 21:52:47 +02:00
parisc-device.h parisc: Make struct parisc_driver::remove() return void 2021-08-30 10:18:25 +02:00
parport.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
patch.h parisc: add support for patching multiple words 2019-06-08 12:56:25 +02:00
pci.h parisc: remove the HBA_DATA macro 2019-02-21 20:37:12 +01:00
pdc.h parisc: Add PDC locking functions for rendezvous code 2022-03-29 21:37:12 +02:00
pdc_chassis.h treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
pdcpat.h parisc: Add PDC locking functions for rendezvous code 2022-03-29 21:37:12 +02:00
perf.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf_event.h
…
pgalloc.h parisc: Rename PMD_ORDER to PMD_TABLE_ORDER 2021-08-30 10:18:25 +02:00
pgtable.h parisc: Change MAX_ADDRESS to become unsigned long long 2022-05-08 20:01:11 +02:00
prefetch.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
processor.h parisc: Find a new timesync master if current CPU is removed 2022-03-29 21:37:13 +02:00
psw.h parisc: asm: psw.h: missing header guard 2019-06-25 14:52:26 +02:00
ptrace.h parisc: Use PRIV_USER and PRIV_KERNEL in ptrace.h 2021-11-01 07:36:00 +01:00
ropes.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rt_sigframe.h parisc: Add vDSO support 2022-03-11 19:49:30 +01:00
runway.h parisc: Drop ifdef __KERNEL__ from non-uapi kernel headers 2021-11-01 07:36:00 +01:00
seccomp.h parisc: Enable seccomp architecture tracking 2020-11-20 11:16:34 -08:00
sections.h asm-generic: Refactor dereference_[kernel]_function_descriptor() 2022-02-16 23:25:11 +11:00
serial.h
…
shmparam.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
signal.h signal/parisc: Remove parisc specific definition of __ARCH_UAPI_SA_FLAGS 2020-11-30 13:43:35 -06:00
smp.h parisc: Implement __cpu_die() and __cpu_disable() for CPU hotplugging 2022-03-29 21:37:12 +02:00
socket.h parisc: Define O_NONBLOCK to become 000200000 2020-10-15 08:10:38 +02:00
sparsemem.h parisc: Switch from DISCONTIGMEM to SPARSEMEM 2019-05-03 23:47:40 +02:00
special_insns.h parisc: Add constants for control registers and clean up mfctl() 2022-03-29 21:37:12 +02:00
spinlock.h locking: Remove spin_lock_flags() etc 2021-10-30 16:37:28 +02:00
spinlock_types.h parisc: Rework arch_rw locking functions 2020-04-05 22:29:55 +02:00
string.h Revert "parisc: Add assembly implementations for memset, strlen, strcpy, strncpy and strcat" 2021-08-29 10:13:32 -07:00
superio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
switch_to.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
syscall.h parisc: define syscall_get_error() 2019-07-16 19:23:24 -07:00
termios.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
thread_info.h parisc: move CPU field back into thread_info 2021-11-04 11:21:47 +01:00
timex.h locking, arch/ia64: Reduce <asm/smp.h> header dependencies by moving XTP bits into the new <asm/xtp.h> header 2020-08-06 16:13:13 +02:00
tlb.h parisc: use pgtable-nopXd instead of 4level-fixup 2019-12-04 19:44:15 -08:00
tlbflush.h parisc: Add vDSO support 2022-03-11 19:49:30 +01:00
topology.h parisc: Switch from GENERIC_CPU_DEVICES to GENERIC_ARCH_TOPOLOGY 2022-03-29 21:37:12 +02:00
traps.h parisc: Fix handling off probe non-access faults 2022-03-11 19:49:30 +01:00
uaccess.h asm-generic updates for 5.18 2022-03-23 18:03:08 -07:00
ucontext.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unaligned.h parisc: Drop ifdef __KERNEL__ from non-uapi kernel headers 2021-11-01 07:36:00 +01:00
unistd.h parisc: Add vDSO support 2022-03-11 19:49:30 +01:00
unwind.h parisc: Consolidate unwind initialization calls 2018-08-17 17:00:08 +02:00
vdso.h parisc: Add vDSO support 2022-03-11 19:49:30 +01:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00