diff options
Diffstat (limited to 'include/linux/arm-smccc.h')
| -rw-r--r-- | include/linux/arm-smccc.h | 313 |
1 files changed, 249 insertions, 64 deletions
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 59494df0f55b..220c8c60e021 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -5,12 +5,15 @@ #ifndef __LINUX_ARM_SMCCC_H #define __LINUX_ARM_SMCCC_H +#include <linux/init.h> #include <uapi/linux/const.h> /* * This file provides common defines for ARM SMC Calling Convention as * specified in - * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html + * https://developer.arm.com/docs/den0028/latest + * + * This code is up-to-date with version DEN 0028 C */ #define ARM_SMCCC_STD_CALL _AC(0,U) @@ -46,16 +49,23 @@ #define ARM_SMCCC_OWNER_OEM 3 #define ARM_SMCCC_OWNER_STANDARD 4 #define ARM_SMCCC_OWNER_STANDARD_HYP 5 +#define ARM_SMCCC_OWNER_VENDOR_HYP 6 #define ARM_SMCCC_OWNER_TRUSTED_APP 48 #define ARM_SMCCC_OWNER_TRUSTED_APP_END 49 #define ARM_SMCCC_OWNER_TRUSTED_OS 50 #define ARM_SMCCC_OWNER_TRUSTED_OS_END 63 +#define ARM_SMCCC_FUNC_QUERY_CALL_UID 0xff01 + #define ARM_SMCCC_QUIRK_NONE 0 #define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */ #define ARM_SMCCC_VERSION_1_0 0x10000 #define ARM_SMCCC_VERSION_1_1 0x10001 +#define ARM_SMCCC_VERSION_1_2 0x10002 +#define ARM_SMCCC_VERSION_1_3 0x10003 + +#define ARM_SMCCC_1_3_SVE_HINT 0x10000 #define ARM_SMCCC_VERSION_FUNC_ID \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ @@ -67,6 +77,11 @@ ARM_SMCCC_SMC_32, \ 0, 1) +#define ARM_SMCCC_ARCH_SOC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + 0, 2) + #define ARM_SMCCC_ARCH_WORKAROUND_1 \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ ARM_SMCCC_SMC_32, \ @@ -77,6 +92,105 @@ ARM_SMCCC_SMC_32, \ 0, 0x7fff) +#define ARM_SMCCC_ARCH_WORKAROUND_3 \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + 0, 0x3fff) + +#define ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_VENDOR_HYP, \ + ARM_SMCCC_FUNC_QUERY_CALL_UID) + +/* KVM UID value: 28b46fb6-2ec5-11e9-a9ca-4b564d003a74 */ +#define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_0 0xb66fb428U +#define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_1 0xe911c52eU +#define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_2 0x564bcaa9U +#define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_3 0x743a004dU + +/* KVM "vendor specific" services */ +#define ARM_SMCCC_KVM_FUNC_FEATURES 0 +#define ARM_SMCCC_KVM_FUNC_PTP 1 +#define ARM_SMCCC_KVM_FUNC_FEATURES_2 127 +#define ARM_SMCCC_KVM_NUM_FUNCS 128 + +#define ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_VENDOR_HYP, \ + ARM_SMCCC_KVM_FUNC_FEATURES) + +#define SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED 1 + +/* + * ptp_kvm is a feature used for time sync between vm and host. + * ptp_kvm module in guest kernel will get service from host using + * this hypercall ID. + */ +#define ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_VENDOR_HYP, \ + ARM_SMCCC_KVM_FUNC_PTP) + +/* ptp_kvm counter type ID */ +#define KVM_PTP_VIRT_COUNTER 0 +#define KVM_PTP_PHYS_COUNTER 1 + +/* Paravirtualised time calls (defined by ARM DEN0057A) */ +#define ARM_SMCCC_HV_PV_TIME_FEATURES \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_STANDARD_HYP, \ + 0x20) + +#define ARM_SMCCC_HV_PV_TIME_ST \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_STANDARD_HYP, \ + 0x21) + +/* TRNG entropy source calls (defined by ARM DEN0098) */ +#define ARM_SMCCC_TRNG_VERSION \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_STANDARD, \ + 0x50) + +#define ARM_SMCCC_TRNG_FEATURES \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_STANDARD, \ + 0x51) + +#define ARM_SMCCC_TRNG_GET_UUID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_STANDARD, \ + 0x52) + +#define ARM_SMCCC_TRNG_RND32 \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_STANDARD, \ + 0x53) + +#define ARM_SMCCC_TRNG_RND64 \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_STANDARD, \ + 0x53) + +/* + * Return codes defined in ARM DEN 0070A + * ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C + */ +#define SMCCC_RET_SUCCESS 0 +#define SMCCC_RET_NOT_SUPPORTED -1 +#define SMCCC_RET_NOT_REQUIRED -2 +#define SMCCC_RET_INVALID_PARAMETER -3 + #ifndef __ASSEMBLY__ #include <linux/linkage.h> @@ -98,6 +212,21 @@ enum arm_smccc_conduit { enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void); /** + * arm_smccc_get_version() + * + * Returns the version to be used for SMCCCv1.1 or later. + * + * When SMCCCv1.1 or above is not present, returns SMCCCv1.0, but this + * does not imply the presence of firmware or a valid conduit. Caller + * handling SMCCCv1.0 must determine the conduit by other means. + */ +u32 arm_smccc_get_version(void); + +void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit); + +extern u64 smccc_has_sve_hint; + +/** * struct arm_smccc_res - Result from SMC/HVC call * @a0-a3 result values from registers 0 to 3 */ @@ -108,6 +237,61 @@ struct arm_smccc_res { unsigned long a3; }; +#ifdef CONFIG_ARM64 +/** + * struct arm_smccc_1_2_regs - Arguments for or Results from SMC/HVC call + * @a0-a17 argument values from registers 0 to 17 + */ +struct arm_smccc_1_2_regs { + unsigned long a0; + unsigned long a1; + unsigned long a2; + unsigned long a3; + unsigned long a4; + unsigned long a5; + unsigned long a6; + unsigned long a7; + unsigned long a8; + unsigned long a9; + unsigned long a10; + unsigned long a11; + unsigned long a12; + unsigned long a13; + unsigned long a14; + unsigned long a15; + unsigned long a16; + unsigned long a17; +}; + +/** + * arm_smccc_1_2_hvc() - make HVC calls + * @args: arguments passed via struct arm_smccc_1_2_regs + * @res: result values via struct arm_smccc_1_2_regs + * + * This function is used to make HVC calls following SMC Calling Convention + * v1.2 or above. The content of the supplied param are copied from the + * structure to registers prior to the HVC instruction. The return values + * are updated with the content from registers on return from the HVC + * instruction. + */ +asmlinkage void arm_smccc_1_2_hvc(const struct arm_smccc_1_2_regs *args, + struct arm_smccc_1_2_regs *res); + +/** + * arm_smccc_1_2_smc() - make SMC calls + * @args: arguments passed via struct arm_smccc_1_2_regs + * @res: result values via struct arm_smccc_1_2_regs + * + * This function is used to make SMC calls following SMC Calling Convention + * v1.2 or above. The content of the supplied param are copied from the + * structure to registers prior to the SMC instruction. The return values + * are updated with the content from registers on return from the SMC + * instruction. + */ +asmlinkage void arm_smccc_1_2_smc(const struct arm_smccc_1_2_regs *args, + struct arm_smccc_1_2_regs *res); +#endif + /** * struct arm_smccc_quirk - Contains quirk information * @id: quirk identification @@ -122,6 +306,15 @@ struct arm_smccc_quirk { }; /** + * __arm_smccc_sve_check() - Set the SVE hint bit when doing SMC calls + * + * Sets the SMCCC hint bit to indicate if there is live state in the SVE + * registers, this modifies x0 in place and should never be called from C + * code. + */ +asmlinkage unsigned long __arm_smccc_sve_check(unsigned long x0); + +/** * __arm_smccc_smc() - make SMC calls * @a0-a7: arguments passed in registers 0 to 7 * @res: result values from registers 0 to 3 @@ -133,10 +326,20 @@ struct arm_smccc_quirk { * from register 0 to 3 on return from the SMC instruction. An optional * quirk structure provides vendor specific behavior. */ +#ifdef CONFIG_HAVE_ARM_SMCCC asmlinkage void __arm_smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2, unsigned long a3, unsigned long a4, unsigned long a5, unsigned long a6, unsigned long a7, struct arm_smccc_res *res, struct arm_smccc_quirk *quirk); +#else +static inline void __arm_smccc_smc(unsigned long a0, unsigned long a1, + unsigned long a2, unsigned long a3, unsigned long a4, + unsigned long a5, unsigned long a6, unsigned long a7, + struct arm_smccc_res *res, struct arm_smccc_quirk *quirk) +{ + *res = (struct arm_smccc_res){}; +} +#endif /** * __arm_smccc_hvc() - make HVC calls @@ -178,94 +381,88 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, #endif +/* nVHE hypervisor doesn't have a current thread so needs separate checks */ +#if defined(CONFIG_ARM64_SVE) && !defined(__KVM_NVHE_HYPERVISOR__) + +#define SMCCC_SVE_CHECK ALTERNATIVE("nop \n", "bl __arm_smccc_sve_check \n", \ + ARM64_SVE) +#define smccc_sve_clobbers "x16", "x30", "cc", + +#else + +#define SMCCC_SVE_CHECK +#define smccc_sve_clobbers + +#endif + #define ___count_args(_0, _1, _2, _3, _4, _5, _6, _7, _8, x, ...) x #define __count_args(...) \ ___count_args(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0) -#define __constraint_write_0 \ - "+r" (r0), "=&r" (r1), "=&r" (r2), "=&r" (r3) -#define __constraint_write_1 \ - "+r" (r0), "+r" (r1), "=&r" (r2), "=&r" (r3) -#define __constraint_write_2 \ - "+r" (r0), "+r" (r1), "+r" (r2), "=&r" (r3) -#define __constraint_write_3 \ - "+r" (r0), "+r" (r1), "+r" (r2), "+r" (r3) -#define __constraint_write_4 __constraint_write_3 -#define __constraint_write_5 __constraint_write_4 -#define __constraint_write_6 __constraint_write_5 -#define __constraint_write_7 __constraint_write_6 - -#define __constraint_read_0 -#define __constraint_read_1 -#define __constraint_read_2 -#define __constraint_read_3 -#define __constraint_read_4 "r" (r4) -#define __constraint_read_5 __constraint_read_4, "r" (r5) -#define __constraint_read_6 __constraint_read_5, "r" (r6) -#define __constraint_read_7 __constraint_read_6, "r" (r7) +#define __constraint_read_0 "r" (arg0) +#define __constraint_read_1 __constraint_read_0, "r" (arg1) +#define __constraint_read_2 __constraint_read_1, "r" (arg2) +#define __constraint_read_3 __constraint_read_2, "r" (arg3) +#define __constraint_read_4 __constraint_read_3, "r" (arg4) +#define __constraint_read_5 __constraint_read_4, "r" (arg5) +#define __constraint_read_6 __constraint_read_5, "r" (arg6) +#define __constraint_read_7 __constraint_read_6, "r" (arg7) #define __declare_arg_0(a0, res) \ struct arm_smccc_res *___res = res; \ - register unsigned long r0 asm("r0") = (u32)a0; \ - register unsigned long r1 asm("r1"); \ - register unsigned long r2 asm("r2"); \ - register unsigned long r3 asm("r3") + register unsigned long arg0 asm("r0") = (u32)a0 #define __declare_arg_1(a0, a1, res) \ typeof(a1) __a1 = a1; \ struct arm_smccc_res *___res = res; \ - register unsigned long r0 asm("r0") = (u32)a0; \ - register unsigned long r1 asm("r1") = __a1; \ - register unsigned long r2 asm("r2"); \ - register unsigned long r3 asm("r3") + register unsigned long arg0 asm("r0") = (u32)a0; \ + register typeof(a1) arg1 asm("r1") = __a1 #define __declare_arg_2(a0, a1, a2, res) \ typeof(a1) __a1 = a1; \ typeof(a2) __a2 = a2; \ struct arm_smccc_res *___res = res; \ - register unsigned long r0 asm("r0") = (u32)a0; \ - register unsigned long r1 asm("r1") = __a1; \ - register unsigned long r2 asm("r2") = __a2; \ - register unsigned long r3 asm("r3") + register unsigned long arg0 asm("r0") = (u32)a0; \ + register typeof(a1) arg1 asm("r1") = __a1; \ + register typeof(a2) arg2 asm("r2") = __a2 #define __declare_arg_3(a0, a1, a2, a3, res) \ typeof(a1) __a1 = a1; \ typeof(a2) __a2 = a2; \ typeof(a3) __a3 = a3; \ struct arm_smccc_res *___res = res; \ - register unsigned long r0 asm("r0") = (u32)a0; \ - register unsigned long r1 asm("r1") = __a1; \ - register unsigned long r2 asm("r2") = __a2; \ - register unsigned long r3 asm("r3") = __a3 + register unsigned long arg0 asm("r0") = (u32)a0; \ + register typeof(a1) arg1 asm("r1") = __a1; \ + register typeof(a2) arg2 asm("r2") = __a2; \ + register typeof(a3) arg3 asm("r3") = __a3 #define __declare_arg_4(a0, a1, a2, a3, a4, res) \ typeof(a4) __a4 = a4; \ __declare_arg_3(a0, a1, a2, a3, res); \ - register unsigned long r4 asm("r4") = __a4 + register typeof(a4) arg4 asm("r4") = __a4 #define __declare_arg_5(a0, a1, a2, a3, a4, a5, res) \ typeof(a5) __a5 = a5; \ __declare_arg_4(a0, a1, a2, a3, a4, res); \ - register unsigned long r5 asm("r5") = __a5 + register typeof(a5) arg5 asm("r5") = __a5 #define __declare_arg_6(a0, a1, a2, a3, a4, a5, a6, res) \ typeof(a6) __a6 = a6; \ __declare_arg_5(a0, a1, a2, a3, a4, a5, res); \ - register unsigned long r6 asm("r6") = __a6 + register typeof(a6) arg6 asm("r6") = __a6 #define __declare_arg_7(a0, a1, a2, a3, a4, a5, a6, a7, res) \ typeof(a7) __a7 = a7; \ __declare_arg_6(a0, a1, a2, a3, a4, a5, a6, res); \ - register unsigned long r7 asm("r7") = __a7 + register typeof(a7) arg7 asm("r7") = __a7 #define ___declare_args(count, ...) __declare_arg_ ## count(__VA_ARGS__) #define __declare_args(count, ...) ___declare_args(count, __VA_ARGS__) #define ___constraints(count) \ - : __constraint_write_ ## count \ : __constraint_read_ ## count \ - : "memory" + : smccc_sve_clobbers "memory" #define __constraints(count) ___constraints(count) /* @@ -275,8 +472,14 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, */ #define __arm_smccc_1_1(inst, ...) \ do { \ + register unsigned long r0 asm("r0"); \ + register unsigned long r1 asm("r1"); \ + register unsigned long r2 asm("r2"); \ + register unsigned long r3 asm("r3"); \ __declare_args(__count_args(__VA_ARGS__), __VA_ARGS__); \ - asm volatile(inst "\n" \ + asm volatile(SMCCC_SVE_CHECK \ + inst "\n" : \ + "=r" (r0), "=r" (r1), "=r" (r2), "=r" (r3) \ __constraints(__count_args(__VA_ARGS__))); \ if (___res) \ *___res = (typeof(*___res)){r0, r1, r2, r3}; \ @@ -314,11 +517,6 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, */ #define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__) -/* Return codes defined in ARM DEN 0070A */ -#define SMCCC_RET_SUCCESS 0 -#define SMCCC_RET_NOT_SUPPORTED -1 -#define SMCCC_RET_NOT_REQUIRED -2 - /* * Like arm_smccc_1_1* but always returns SMCCC_RET_NOT_SUPPORTED. * Used when the SMCCC conduit is not defined. The empty asm statement @@ -327,7 +525,7 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, #define __fail_smccc_1_1(...) \ do { \ __declare_args(__count_args(__VA_ARGS__), __VA_ARGS__); \ - asm ("" __constraints(__count_args(__VA_ARGS__))); \ + asm ("" : __constraints(__count_args(__VA_ARGS__))); \ if (___res) \ ___res->a0 = SMCCC_RET_NOT_SUPPORTED; \ } while (0) @@ -364,18 +562,5 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, method; \ }) -/* Paravirtualised time calls (defined by ARM DEN0057A) */ -#define ARM_SMCCC_HV_PV_TIME_FEATURES \ - ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ - ARM_SMCCC_SMC_64, \ - ARM_SMCCC_OWNER_STANDARD_HYP, \ - 0x20) - -#define ARM_SMCCC_HV_PV_TIME_ST \ - ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ - ARM_SMCCC_SMC_64, \ - ARM_SMCCC_OWNER_STANDARD_HYP, \ - 0x21) - #endif /*__ASSEMBLY__*/ #endif /*__LINUX_ARM_SMCCC_H*/ |