Catalin Marinas aa57157be6 arm64: Ensure VM_WRITE|VM_SHARED ptes are clean by default ... Shared and writable mappings (__S.1.) should be clean (!dirty) initially and made dirty on a subsequent write either through the hardware DBM (dirty bit management) mechanism or through a write page fault. A clean pte for the arm64 kernel is one that has PTE_RDONLY set and PTE_DIRTY clear. The PAGE_SHARED{,_EXEC} attributes have PTE_WRITE set (PTE_DBM) and PTE_DIRTY clear. Prior to commit 73e86cb03c ("arm64: Move PTE_RDONLY bit handling out of set_pte_at()"), it was the responsibility of set_pte_at() to set the PTE_RDONLY bit and mark the pte clean if the software PTE_DIRTY bit was not set. However, the above commit removed the pte_sw_dirty() check and the subsequent setting of PTE_RDONLY in set_pte_at() while leaving the PAGE_SHARED{,_EXEC} definitions unchanged. The result is that shared+writable mappings are now dirty by default Fix the above by explicitly setting PTE_RDONLY in PAGE_SHARED{,_EXEC}. In addition, remove the superfluous PTE_DIRTY bit from the kernel PROT_* attributes. Fixes: 73e86cb03c ("arm64: Move PTE_RDONLY bit handling out of set_pte_at()") Cc: <stable@vger.kernel.org> # 4.14.x- Cc: Will Deacon <will@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will@kernel.org>		2019-10-29 16:22:33 +00:00
..
boot	pci-v5.4-changes	2019-09-23 19:16:01 -07:00
configs	arm64/ARM: configs: Change CONFIG_REMOTEPROC from m to y	2019-09-30 11:48:00 -07:00
crypto	crypto: arm64/aes-neonbs - implement ciphertext stealing for XTS	2019-09-09 17:35:39 +10:00
include	arm64: Ensure VM_WRITE|VM_SHARED ptes are clean by default	2019-10-29 16:22:33 +00:00
kernel	Merge branch 'errata/tx2-219' into for-next/fixes	2019-10-17 13:42:42 -07:00
kvm	arm64: KVM: Trap VM ops when ARM64_WORKAROUND_CAVIUM_TX2_219_TVM is set	2019-10-08 12:25:03 +01:00
lib	Merge branch 'for-next/atomics' into for-next/core	2019-08-30 12:55:39 +01:00
mm	arm64: mm: fix inverted PAR_EL1.F check	2019-10-16 09:58:03 -07:00
net	arm64: bpf: optimize modulo operation	2019-09-03 15:44:40 +02:00
xen	xen/efi: have a common runtime setup function	2019-10-02 10:31:07 -04:00
Kbuild	arm64: add arch/arm64/Kbuild	2019-08-21 18:47:15 +01:00
Kconfig	Merge branch 'errata/tx2-219' into for-next/fixes	2019-10-17 13:42:42 -07:00
Kconfig.debug
Kconfig.platforms	arm64: exynos: Enable exynos-chipid driver	2019-09-04 22:43:26 +02:00
Makefile	arm64: Kconfig: Make CONFIG_COMPAT_VDSO a proper Kconfig option	2019-10-07 13:32:15 +01:00