From f13582bcc607252f7309723aa903b4ed857de94b Mon Sep 17 00:00:00 2001 From: Marc Zyngier <marc.zyngier@arm.com> Date: Fri, 8 Nov 2019 13:35:12 +0100 Subject: [PATCH] arm/arm64: KVM: Advertise SMCCC v1.1 commit 09e6be12effdb33bf7210c8867bbd213b66a499e upstream. The new SMC Calling Convention (v1.1) allows for a reduced overhead when calling into the firmware, and provides a new feature discovery mechanism. Make it visible to KVM guests. Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> [v4.9: account for files moved to virt/ upstream] Signed-off-by: Mark Rutland <mark.rutland@arm.com> [v4.9 backport] Tested-by: Greg Hackmann <ghackmann@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [ardb: restrict to include/linux/arm-smccc.h, drop KVM bits] Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- include/linux/arm-smccc.h | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index b5abfda80465..8bf047eab116 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -14,9 +14,6 @@ #ifndef __LINUX_ARM_SMCCC_H #define __LINUX_ARM_SMCCC_H -#include <linux/linkage.h> -#include <linux/types.h> - /* * This file provides common defines for ARM SMC Calling Convention as * specified in @@ -60,6 +57,24 @@ #define ARM_SMCCC_OWNER_TRUSTED_OS 50 #define ARM_SMCCC_OWNER_TRUSTED_OS_END 63 +#define ARM_SMCCC_VERSION_1_0 0x10000 +#define ARM_SMCCC_VERSION_1_1 0x10001 + +#define ARM_SMCCC_VERSION_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + 0, 0) + +#define ARM_SMCCC_ARCH_FEATURES_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + 0, 1) + +#ifndef __ASSEMBLY__ + +#include <linux/linkage.h> +#include <linux/types.h> + /** * struct arm_smccc_res - Result from SMC/HVC call * @a0-a3 result values from registers 0 to 3 @@ -101,4 +116,5 @@ asmlinkage void arm_smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a5, unsigned long a6, unsigned long a7, struct arm_smccc_res *res); +#endif /*__ASSEMBLY__*/ #endif /*__LINUX_ARM_SMCCC_H*/