Mark Rutland b90b4a608e arm64: fix KASLR boot-time I-cache maintenance ... Commit f80fb3a3d5 ("arm64: add support for kernel ASLR") missed a DSB necessary to complete I-cache maintenance in the primary boot path, and hence stale instructions may still be present in the I-cache and may be executed until the I-cache maintenance naturally completes. Since commit 8ec4198743 ("arm64: mm: ensure patched kernel text is fetched from PoU"), all CPUs invalidate their I-caches after their MMU is enabled. Prior a CPU's MMU having been enabled, arbitrary lines may have been fetched from the PoC into I-caches. We never patch text expected to be executed with the MMU off. Thus, it is unnecessary to perform broadcast I-cache maintenance in the primary boot path. This patch reduces the scope of the I-cache maintenance to the local CPU, and adds the missing DSB with similar scope, matching prior maintenance in the primary boot path. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Ard Biesehvuel <ard.biesheuvel@linaro.org> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2016-03-21 12:08:50 +00:00
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boot	arm64: Fix misspellings in comments.	2016-03-04 18:19:17 +00:00
configs	arm64: defconfig: updates for 4.5	2016-01-26 11:24:41 +00:00
crypto	arm64: crypto: reduce priority of core AES cipher	2015-11-18 12:09:08 +00:00
include	arm64: Update PTE_RDONLY in set_pte_at() for PROT_NONE permission	2016-03-11 11:03:34 +00:00
kernel	arm64: fix KASLR boot-time I-cache maintenance	2016-03-21 12:08:50 +00:00
kvm	arm64: Rename cpuid_feature field extract routines	2016-02-25 10:33:08 +00:00
lib	arm64: Fix misspellings in comments.	2016-03-04 18:19:17 +00:00
mm	arm64: kasan: Fix zero shadow mapping overriding kernel image shadow	2016-03-11 11:03:35 +00:00
net	arm64: bpf: add extra pass to handle faulty codegen	2016-01-17 19:15:26 -05:00
xen	xen/arm: introduce HYPERVISOR_platform_op on arm and arm64	2015-12-21 14:40:56 +00:00
Kconfig	arm64: kconfig: add submenu for 8.2 architectural features	2016-02-26 18:12:35 +00:00
Kconfig.debug	arm64: enable CONFIG_DEBUG_RODATA by default	2016-03-03 18:14:17 +00:00
Kconfig.platforms	ARM: SoC support for Tegra platforms for v4.5	2016-01-22 17:30:52 -08:00
Makefile	arm64: add support for building vmlinux as a relocatable PIE binary	2016-02-24 14:57:27 +00:00