arm64 fixes/updates for 5.13-rc2

Hi Linus,

Please pull the arm64 updates below. Thanks.

The following changes since commit 6efb943b8616ec53a5e444193dccf1af9ad627b5:

Linux 5.13-rc1 (2021-05-09 14:17:44 -0700)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux tags/arm64-fixes

for you to fetch changes up to 588a513d34257fdde95a9f0df0202e31998e85c6:

arm64: Fix race condition on PG_dcache_clean in __sync_icache_dcache() (2021-05-14 17:11:16 +0100)

----------------------------------------------------------------
arm64 fixes and cpucaps.h automatic generation:

- Generate cpucaps.h at build time rather than carrying lots of #defines. Merged at -rc1 to avoid some conflicts during the merging window.

- Initialise RGSR_EL1.SEED in __cpu_setup() as it may be left as 0 out of reset and the IRG instruction would not function as expected if only the architected pseudorandom number generator is implemented.

- Fix potential race condition in __sync_icache_dcache() where the PG_dcache_clean page flag is set before the actual cache maintenance.

- Fix header include in BTI kselftests.

----------------------------------------------------------------
Catalin Marinas (1):
arm64: Fix race condition on PG_dcache_clean in __sync_icache_dcache()

Mark Brown (3):
arm64: Generate cpucaps.h
kselftest/arm64: Add missing stddef.h include to BTI tests
arm64: tools: Add __ASM_CPUCAPS_H to the endif in cpucaps.h

Peter Collingbourne (1):
arm64: mte: initialize RGSR_EL1.SEED in __cpu_setup

 arch/arm64/Makefile                      |  3 ++
 arch/arm64/include/asm/Kbuild            |  2 +
 arch/arm64/include/asm/cpucaps.h         | 74 --------------------------------
 arch/arm64/mm/flush.c                    |  4 +-
 arch/arm64/mm/proc.S                     | 12 ++++++
 arch/arm64/tools/Makefile                | 22 ++++++++++
 arch/arm64/tools/cpucaps                 | 65 ++++++++++++++++++++++++++++
 arch/arm64/tools/gen-cpucaps.awk         | 40 +++++++++++++++++
 tools/testing/selftests/arm64/bti/test.c |  1 +
 9 files changed, 148 insertions(+), 75 deletions(-)
 delete mode 100644 arch/arm64/include/asm/cpucaps.h
 create mode 100644 arch/arm64/tools/Makefile
 create mode 100644 arch/arm64/tools/cpucaps
 create mode 100755 arch/arm64/tools/gen-cpucaps.awk

Catalin