Re: [PATCH v3] KVM: arm64: ARM_SMCCC_ARCH_WORKAROUND_1 doesn't return SMCCC_RET_NOT_REQUIRED

Quoting Will Deacon (2020-10-26 06:25:33)

On Fri, Oct 23, 2020 at 08:47:50AM -0700, Stephen Boyd wrote:

...

diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 15c706fb0a37..0e50ba3e88d7 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -86,6 +86,8 @@ ARM_SMCCC_SMC_32, \ 0, 0x7fff) +#define SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED 1

I thought we'd stick this in asm/spectre.h, but here is also good:

Acked-by: Will Deacon will@kernel.org

Ah sorry I glossed over that one. I suppose it can be moved during patch application if desired.