Re: [PATCH v2] arm64: KVM: Use SMCCC_ARCH_WORKAROUND_1 for Falkor BP hardening

From: Marc Zyngier
Date: Tue Mar 06 2018 - 05:32:29 EST


On Mon, 05 Mar 2018 17:06:43 +0000,
Shanker Donthineni wrote:
>
> The function SMCCC_ARCH_WORKAROUND_1 was introduced as part of SMC
> V1.1 Calling Convention to mitigate CVE-2017-5715. This patch uses
> the standard call SMCCC_ARCH_WORKAROUND_1 for Falkor chips instead
> of Silicon provider service ID 0xC2001700.
>
> Signed-off-by: Shanker Donthineni <shankerd@xxxxxxxxxxxxxx>
> ---
> Chnages since v1:
> - Trivial change in cpucaps.h (refresh after removing ARM64_HARDEN_BP_POST_GUEST_EXIT)
>
> arch/arm64/include/asm/cpucaps.h | 5 ++--
> arch/arm64/include/asm/kvm_asm.h | 2 --
> arch/arm64/kernel/bpi.S | 8 ------
> arch/arm64/kernel/cpu_errata.c | 55 ++++++++++++++--------------------------
> arch/arm64/kvm/hyp/entry.S | 12 ---------
> arch/arm64/kvm/hyp/switch.c | 10 --------
> 6 files changed, 21 insertions(+), 71 deletions(-)

Reviewed-by: Marc Zyngier <marc.zyngier@xxxxxxx>

Will/Catalin, if you want to take it via the arm64 tree, that's fine
by me.

Thanks,

M.

--
Jazz is not dead, it just smell funny.