[PATCH v2 00/11] arm64 kpti hardening and variant 2 workarounds

Will Deacon
2018-01-05T13:12:30Z

Hi again,

This is version two of the patches I posted yesterday:

http://lists.infradead.org/pipermail/linux-arm-kernel/2018-January/551838.html

Changes since v1:

* Added comment to BL/RET sequence in trampoline page
* Removed writeback addressing modes from Hyp PSCI register save/restore
* Avoid save/restore of x18/x19 across Hyp PSCI call
* Always print message when kpti is enabled
* Added tags

Cheers,

Will

--->8

Marc Zyngier (3):
arm64: Move post_ttbr_update_workaround to C code
arm64: KVM: Use per-CPU vector when BP hardening is enabled
arm64: KVM: Make PSCI_VERSION a fast path

Will Deacon (8):
arm64: use RET instruction for exiting the trampoline
arm64: Kconfig: Reword UNMAP_KERNEL_AT_EL0 kconfig entry
arm64: Take into account ID_AA64PFR0_EL1.CSV3
arm64: cpufeature: Pass capability structure to ->enable callback
drivers/firmware: Expose psci_get_version through psci_ops structure
arm64: Add skeleton to harden the branch predictor against aliasing
attacks
arm64: cputype: Add missing MIDR values for Cortex-A72 and Cortex-A75
arm64: Implement branch predictor hardening for affected Cortex-A CPUs

arch/arm/include/asm/kvm_mmu.h | 10 ++++
arch/arm64/Kconfig | 30 +++++++---
arch/arm64/include/asm/assembler.h | 13 -----
arch/arm64/include/asm/cpucaps.h | 3 +-
arch/arm64/include/asm/cputype.h | 4 ++
arch/arm64/include/asm/kvm_mmu.h | 38 ++++++++++++
arch/arm64/include/asm/mmu.h | 37 ++++++++++++
arch/arm64/include/asm/sysreg.h | 2 +
arch/arm64/kernel/Makefile | 4 ++
arch/arm64/kernel/bpi.S | 79 +++++++++++++++++++++++++
arch/arm64/kernel/cpu_errata.c | 116 +++++++++++++++++++++++++++++++++++++
arch/arm64/kernel/cpufeature.c | 13 ++++-
arch/arm64/kernel/entry.S | 12 +++-
arch/arm64/kvm/hyp/switch.c | 15 ++++-
arch/arm64/mm/context.c | 11 ++++
arch/arm64/mm/fault.c | 1 +
arch/arm64/mm/proc.S | 3 +-
drivers/firmware/psci.c | 2 +
include/linux/psci.h | 1 +
virt/kvm/arm/arm.c | 8 ++-
20 files changed, 372 insertions(+), 30 deletions(-)
create mode 100644 arch/arm64/kernel/bpi.S

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2.1.4