From: Mark Brown Date: Wed, 6 Mar 2024 23:14:47 +0000 (+0000) Subject: arm64/fpsimd: Enable host kernel access to FPMR X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b6c0b424cb91a864e62533a6520743ddcdde5270;p=linux.git arm64/fpsimd: Enable host kernel access to FPMR FEAT_FPMR provides a new generally accessible architectural register FPMR. This is only accessible to EL0 and EL1 when HCRX_EL2.EnFPM is set to 1, do this when the host is running. The guest part will be done along with context switching the new register and exposing it via guest management. Acked-by: Marc Zyngier Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20240306-arm64-2023-dpisa-v5-2-c568edc8ed7f@kernel.org Signed-off-by: Catalin Marinas --- diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 3c6f8ba1e4792..7f45ce9170bb3 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -105,7 +105,7 @@ #define HCRX_GUEST_FLAGS \ (HCRX_EL2_SMPME | HCRX_EL2_TCR2En | \ (cpus_have_final_cap(ARM64_HAS_MOPS) ? (HCRX_EL2_MSCEn | HCRX_EL2_MCE2) : 0)) -#define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En) +#define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En | HCRX_EL2_EnFPM) /* TCR_EL2 Registers bits */ #define TCR_EL2_DS (1UL << 32)