OpenCloudOS-Kernel/arch/s390
Peter Zijlstra 1e9fdf21a4 mmu_gather: Remove per arch tlb_{start,end}_vma()
Scattered across the archs are 3 basic forms of tlb_{start,end}_vma().
Provide two new MMU_GATHER_knobs to enumerate them and remove the per
arch tlb_{start,end}_vma() implementations.

 - MMU_GATHER_NO_FLUSH_CACHE indicates the arch has flush_cache_range()
   but does *NOT* want to call it for each VMA.

 - MMU_GATHER_MERGE_VMAS indicates the arch wants to merge the
   invalidate across multiple VMAs if possible.

With these it is possible to capture the three forms:

  1) empty stubs;
     select MMU_GATHER_NO_FLUSH_CACHE and MMU_GATHER_MERGE_VMAS

  2) start: flush_cache_range(), end: empty;
     select MMU_GATHER_MERGE_VMAS

  3) start: flush_cache_range(), end: flush_tlb_range();
     default

Obviously, if the architecture does not have flush_cache_range() then
it also doesn't need to select MMU_GATHER_NO_FLUSH_CACHE.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-07-21 10:50:13 -07:00
..
appldata s390/appldata: use struct_size() helper 2020-06-29 16:32:34 +02:00
boot Kbuild updates for v5.19 2022-05-26 12:09:50 -07:00
configs s390: enable CONFIG_HARDENED_USERCOPY in debug_defconfig 2022-04-12 11:56:08 +02:00
crypto s390/archrandom: simplify back to earlier design and initialize earlier 2022-06-30 19:40:36 +02:00
hypfs s390/hypfs: fix typos in comments 2022-05-06 20:45:13 +02:00
include mmu_gather: Remove per arch tlb_{start,end}_vma() 2022-07-21 10:50:13 -07:00
kernel s390/archrandom: simplify back to earlier design and initialize earlier 2022-06-30 19:40:36 +02:00
kvm Bitmap patches for 5.19-rc1 2022-06-04 14:04:27 -07:00
lib s390/nospec: build expoline.o for modules_prepare target 2022-07-13 15:21:55 +02:00
mm virtio: replace arch_has_restricted_virtio_memory_access() 2022-06-06 08:22:01 +02:00
net s390/bpf: Fix typo in comment 2022-05-23 11:25:53 -07:00
pci s390/pci: add error record for CC 2 retries 2022-04-25 13:54:15 +02:00
purgatory s390/purgatory: remove duplicated build rule of kexec-purgatory.o 2022-06-30 14:18:16 +02:00
tools s390: raise minimum supported machine generation to z10 2022-03-10 15:58:17 +01:00
Kbuild kbuild: use more subdir- for visiting subdirectories while cleaning 2021-10-24 13:49:46 +09:00
Kconfig mmu_gather: Remove per arch tlb_{start,end}_vma() 2022-07-21 10:50:13 -07:00
Kconfig.debug s390/Kconfig.debug: fix indentation 2022-06-01 12:03:15 +02:00
Makefile s390/nospec: remove unneeded header includes 2022-07-13 15:21:55 +02:00