Hi David, On 10/31/18 6:56 AM, David Long wrote: > From: "David A. Long" <dave.long@xxxxxxxxxx> > > V4.9 backport of spectre patches from Russell M. King's spectre branch. > Patches not yet in upstream are excluded. Thanks for submitting those patches! Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx> Boot tested on a Brahma-B15 based platform and did not see any regressions or issues, seeing about the same hackbench performance before and after. Test: #!/bin/sh for i in $(seq 0 9) do hackbench 13 process 10000 done before: min: 140.800 max: 142.571 avg: 141.7233 after: min: 140.004 max: 141.600 avg: 141.0242 > > Marc Zyngier (2): > ARM: KVM: invalidate BTB on guest exit for Cortex-A12/A17 > ARM: KVM: invalidate icache on guest exit for Cortex-A15 > > Russell King (22): > ARM: add more CPU part numbers for Cortex and Brahma B15 CPUs > ARM: bugs: prepare processor bug infrastructure > ARM: bugs: hook processor bug checking into SMP and suspend paths > ARM: bugs: add support for per-processor bug checking > ARM: spectre: add Kconfig symbol for CPUs vulnerable to Spectre > ARM: spectre-v2: harden branch predictor on context switches > ARM: spectre-v2: add Cortex A8 and A15 validation of the IBE bit > ARM: spectre-v2: harden user aborts in kernel space > ARM: spectre-v2: add firmware based hardening > ARM: spectre-v2: warn about incorrect context switching functions > ARM: spectre-v2: KVM: invalidate icache on guest exit for Brahma B15 > ARM: KVM: Add SMCCC_ARCH_WORKAROUND_1 fast handling > ARM: KVM: report support for SMCCC_ARCH_WORKAROUND_1 > ARM: spectre-v1: add speculation barrier (csdb) macros > ARM: spectre-v1: add array_index_mask_nospec() implementation > ARM: spectre-v1: fix syscall entry > ARM: signal: copy registers using __copy_from_user() > ARM: vfp: use __copy_from_user() when restoring VFP state > ARM: oabi-compat: copy semops using __copy_from_user() > ARM: use __inttype() in get_user() > ARM: spectre-v1: use get_user() for __get_user() > ARM: spectre-v1: mitigate user accesses > > arch/arm/include/asm/assembler.h | 12 ++ > arch/arm/include/asm/barrier.h | 32 ++++++ > arch/arm/include/asm/bugs.h | 6 +- > arch/arm/include/asm/cp15.h | 3 + > arch/arm/include/asm/cputype.h | 8 ++ > arch/arm/include/asm/kvm_asm.h | 2 - > arch/arm/include/asm/kvm_host.h | 14 ++- > arch/arm/include/asm/kvm_mmu.h | 23 +++- > arch/arm/include/asm/proc-fns.h | 4 + > arch/arm/include/asm/system_misc.h | 15 +++ > arch/arm/include/asm/thread_info.h | 4 +- > arch/arm/include/asm/uaccess.h | 26 +++-- > arch/arm/kernel/Makefile | 1 + > arch/arm/kernel/bugs.c | 18 +++ > arch/arm/kernel/entry-common.S | 18 ++- > arch/arm/kernel/entry-header.S | 25 +++++ > arch/arm/kernel/signal.c | 55 ++++----- > arch/arm/kernel/smp.c | 4 + > arch/arm/kernel/suspend.c | 2 + > arch/arm/kernel/sys_oabi-compat.c | 8 +- > arch/arm/kvm/hyp/hyp-entry.S | 110 +++++++++++++++++- > arch/arm/lib/copy_from_user.S | 9 ++ > arch/arm/mm/Kconfig | 23 ++++ > arch/arm/mm/Makefile | 2 +- > arch/arm/mm/fault.c | 3 + > arch/arm/mm/proc-macros.S | 3 +- > arch/arm/mm/proc-v7-2level.S | 6 - > arch/arm/mm/proc-v7-bugs.c | 174 +++++++++++++++++++++++++++++ > arch/arm/mm/proc-v7.S | 154 +++++++++++++++++++------ > arch/arm/vfp/vfpmodule.c | 17 ++- > 30 files changed, 674 insertions(+), 107 deletions(-) > create mode 100644 arch/arm/kernel/bugs.c > create mode 100644 arch/arm/mm/proc-v7-bugs.c > -- Florian
