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linux/arch/arm64
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Mark Rutland 7127d43e18 arm64: fix erroneous __raw_read_system_reg() cases 
commit 7d0928f18b upstream.

Since it was introduced in commit da8d02d19f ("arm64/capabilities:
Make use of system wide safe value"), __raw_read_system_reg() has
erroneously mapped some sysreg IDs to other registers.

For the fields in ID_ISAR5_EL1, our local feature detection will be
erroneous. We may spuriously detect that a feature is uniformly
supported, or may fail to detect when it actually is, meaning some
compat hwcaps may be erroneous (or not enforced upon hotplug).

This patch corrects the erroneous entries.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Fixes: da8d02d19f ("arm64/capabilities: Make use of system wide safe value")
Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-03-12 06:41:48 +01:00
..
boot ARM64: dts: bcm2835: Fix bcm2837 compatible string 2017-01-15 13:42:56 +01:00
configs ZTE arm64 defconfig updates for 4.9: 2016-09-19 22:35:21 +02:00
crypto crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes 2017-02-09 08:08:26 +01:00
include arm/arm64: KVM: Enforce unconditional flush to PoC when mapping to stage-2 2017-03-12 06:41:47 +01:00
kernel arm64: fix erroneous __raw_read_system_reg() cases 2017-03-12 06:41:48 +01:00
kvm arm64: KVM: pmu: Reset PMSELR_EL0.SEL to a sane value before entering the guest 2017-01-09 08:32:22 +01:00
lib Merge branch 'work.uaccess' into for-linus 2016-10-14 20:42:44 -04:00
mm arm64: dma-mapping: Fix dma_mapping_error() when bypassing SWIOTLB 2017-03-12 06:41:47 +01:00
net arm64: bpf: optimize LD_ABS, LD_IND 2016-06-10 23:11:50 -07:00
xen arm/xen: add support for vm_assist hypercall 2016-07-06 10:42:14 +01:00
Kconfig arm64: kaslr: keep modules close to the kernel when DYNAMIC_FTRACE=y 2016-10-17 16:24:02 +01:00
Kconfig.debug arm64: always enable DEBUG_RODATA and remove the Kconfig option 2016-08-26 10:13:41 +01:00
Kconfig.platforms arm64: uniphier: select ARCH_HAS_RESET_CONTROLLER 2016-10-22 18:25:52 +09:00
Makefile arm64: kernel: force ET_DYN ELF type for CONFIG_RELOCATABLE=y 2016-10-20 11:37:25 +01:00