Messages in this thread | | | From | Suzuki K Poulose <> | Subject | [PATCH v3 0/7] arm64: Support for systems without AArch32 state | Date | Thu, 31 Mar 2016 18:27:28 +0100 |
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This series add checks to make sure that the AArch32 state is supported before we process the 32bit ID registers. Also checks the same for COMPAT binary execution.
Applies on top of 4.6-rc1. The series remains unchanged from V3, except for :
Changes since V2: - Rebased to 4.6-rc1 - Drop redundant KVM check introduced in V1.
Changes since V1: - Prevent changing the personality to PER_LINUX32 by adding wrapper for personality() syscall. - Add the check to KVM before initialising a AArch32 vcpu - Tested on hardware.
Btw, linux32 doesn't complain when the personality() syscall fails to change to PER_LINUX32. You can verify the personality by running $ cat /proc/cpuinfo which would still list the 64bit features for the CPUs.
Suzuki K Poulose (6): arm64: hwcaps: Cleanup naming arm64: HWCAP: Split COMPAT HWCAP table entries arm64: Add helpers for detecting AArch32 support at EL0 arm64: cpufeature: Check availability of AArch32 arm64: cpufeature: Track 32bit EL0 support arm64: Add a wrapper for personality() syscall
Yury Norov (1): arm64: compat: Check for AArch32 state
arch/arm64/include/asm/cpufeature.h | 15 ++- arch/arm64/include/asm/elf.h | 3 +- arch/arm64/include/asm/sysreg.h | 1 + arch/arm64/kernel/cpufeature.c | 208 ++++++++++++++++++++--------------- arch/arm64/kernel/cpuinfo.c | 37 ++++--- arch/arm64/kernel/sys.c | 10 ++ 6 files changed, 165 insertions(+), 109 deletions(-)
-- 1.7.9.5
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