/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright ( c ) 2015 , Linaro Limited
*/
#ifndef __LINUX_ARM_SMCCC_H
#define __LINUX_ARM_SMCCC_H
#include <linux/args.h>
#include <linux/init.h>
#ifndef __ASSEMBLY__
#include <linux/uuid.h>
#endif
#include <uapi/linux/const .h>
/*
* This file provides common defines for ARM SMC Calling Convention as
* specified in
* 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)
#define ARM_SMCCC_FAST_CALL _AC(1 ,U)
#define ARM_SMCCC_TYPE_SHIFT 31
#define ARM_SMCCC_SMC_32 0
#define ARM_SMCCC_SMC_64 1
#define ARM_SMCCC_CALL_CONV_SHIFT 30
#define ARM_SMCCC_OWNER_MASK 0 x3F
#define ARM_SMCCC_OWNER_SHIFT 24
#define ARM_SMCCC_FUNC_MASK 0 xFFFF
#define ARM_SMCCC_IS_FAST_CALL(smc_val) \
((smc_val) & (ARM_SMCCC_FAST_CALL << ARM_SMCCC_TYPE_SHIFT))
#define ARM_SMCCC_IS_64(smc_val) \
((smc_val) & (ARM_SMCCC_SMC_64 << ARM_SMCCC_CALL_CONV_SHIFT))
#define ARM_SMCCC_FUNC_NUM(smc_val) ((smc_val) & ARM_SMCCC_FUNC_MASK)
#define ARM_SMCCC_OWNER_NUM(smc_val) \
(((smc_val) >> ARM_SMCCC_OWNER_SHIFT) & ARM_SMCCC_OWNER_MASK)
#define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \
(((type) << ARM_SMCCC_TYPE_SHIFT) | \
((calling_convention) << ARM_SMCCC_CALL_CONV_SHIFT) | \
(((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) | \
((func_num) & ARM_SMCCC_FUNC_MASK))
#define ARM_SMCCC_OWNER_ARCH 0
#define ARM_SMCCC_OWNER_CPU 1
#define ARM_SMCCC_OWNER_SIP 2
#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 0 xff01
#define ARM_SMCCC_QUIRK_NONE 0
#define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */
#define ARM_SMCCC_VERSION_1_0 0 x10000
#define ARM_SMCCC_VERSION_1_1 0 x10001
#define ARM_SMCCC_VERSION_1_2 0 x10002
#define ARM_SMCCC_VERSION_1_3 0 x10003
#define ARM_SMCCC_1_3_SVE_HINT 0 x10000
#define ARM_SMCCC_CALL_HINTS ARM_SMCCC_1_3_SVE_HINT
#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 )
#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, \
0 , 0 x8000)
#define ARM_SMCCC_ARCH_WORKAROUND_2 \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_32, \
0 , 0 x7fff)
#define ARM_SMCCC_ARCH_WORKAROUND_3 \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_32, \
0 , 0 x3fff)
#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 UUID_INIT(\
0 x28b46fb6, 0 x2ec5, 0 x11e9, \
0 xa9, 0 xca, 0 x4b, 0 x56, \
0 x4d, 0 x00, 0 x3a, 0 x74)
/* KVM "vendor specific" services */
#define ARM_SMCCC_KVM_FUNC_FEATURES 0
#define ARM_SMCCC_KVM_FUNC_PTP 1
/* Start of pKVM hypercall range */
#define ARM_SMCCC_KVM_FUNC_HYP_MEMINFO 2
#define ARM_SMCCC_KVM_FUNC_MEM_SHARE 3
#define ARM_SMCCC_KVM_FUNC_MEM_UNSHARE 4
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_5 5
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_6 6
#define ARM_SMCCC_KVM_FUNC_MMIO_GUARD 7
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_8 8
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_9 9
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_10 10
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_11 11
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_12 12
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_13 13
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_14 14
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_15 15
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_16 16
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_17 17
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_18 18
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_19 19
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_20 20
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_21 21
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_22 22
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_23 23
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_24 24
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_25 25
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_26 26
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_27 27
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_28 28
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_29 29
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_30 30
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_31 31
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_32 32
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_33 33
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_34 34
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_35 35
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_36 36
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_37 37
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_38 38
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_39 39
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_40 40
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_41 41
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_42 42
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_43 43
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_44 44
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_45 45
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_46 46
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_47 47
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_48 48
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_49 49
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_50 50
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_51 51
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_52 52
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_53 53
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_54 54
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_55 55
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_56 56
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_57 57
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_58 58
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_59 59
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_60 60
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_61 61
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_62 62
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_63 63
/* End of pKVM hypercall range */
#define ARM_SMCCC_KVM_FUNC_DISCOVER_IMPL_VER 64
#define ARM_SMCCC_KVM_FUNC_DISCOVER_IMPL_CPUS 65
#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)
#define ARM_SMCCC_VENDOR_HYP_KVM_HYP_MEMINFO_FUNC_ID \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_VENDOR_HYP, \
ARM_SMCCC_KVM_FUNC_HYP_MEMINFO)
#define ARM_SMCCC_VENDOR_HYP_KVM_MEM_SHARE_FUNC_ID \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_VENDOR_HYP, \
ARM_SMCCC_KVM_FUNC_MEM_SHARE)
#define ARM_SMCCC_VENDOR_HYP_KVM_MEM_UNSHARE_FUNC_ID \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_VENDOR_HYP, \
ARM_SMCCC_KVM_FUNC_MEM_UNSHARE)
#define ARM_SMCCC_VENDOR_HYP_KVM_MMIO_GUARD_FUNC_ID \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_VENDOR_HYP, \
ARM_SMCCC_KVM_FUNC_MMIO_GUARD)
#define ARM_SMCCC_VENDOR_HYP_KVM_DISCOVER_IMPL_VER_FUNC_ID \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_VENDOR_HYP, \
ARM_SMCCC_KVM_FUNC_DISCOVER_IMPL_VER)
#define ARM_SMCCC_VENDOR_HYP_KVM_DISCOVER_IMPL_CPUS_FUNC_ID \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_VENDOR_HYP, \
ARM_SMCCC_KVM_FUNC_DISCOVER_IMPL_CPUS)
/* 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, \
0 x20)
#define ARM_SMCCC_HV_PV_TIME_ST \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_STANDARD_HYP, \
0 x21)
/* 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, \
0 x50)
#define ARM_SMCCC_TRNG_FEATURES \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_32, \
ARM_SMCCC_OWNER_STANDARD, \
0 x51)
#define ARM_SMCCC_TRNG_GET_UUID \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_32, \
ARM_SMCCC_OWNER_STANDARD, \
0 x52)
#define ARM_SMCCC_TRNG_RND32 \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_32, \
ARM_SMCCC_OWNER_STANDARD, \
0 x53)
#define ARM_SMCCC_TRNG_RND64 \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_STANDARD, \
0 x53)
/*
* Return codes defined in ARM DEN 0070 A
* ARM DEN 0070 A 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>
#include <linux/types.h>
enum arm_smccc_conduit {
SMCCC_CONDUIT_NONE,
SMCCC_CONDUIT_SMC,
SMCCC_CONDUIT_HVC,
};
/**
* arm_smccc_1_1_get_conduit ( )
*
* Returns the conduit to be used for SMCCCv1 . 1 or later .
*
* When SMCCCv1 . 1 is not present , returns SMCCC_CONDUIT_NONE .
*/
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);
/**
* arm_smccc_get_soc_id_version ( )
*
* Returns the SOC ID version .
*
* When ARM_SMCCC_ARCH_SOC_ID is not present , returns SMCCC_RET_NOT_SUPPORTED .
*/
s32 arm_smccc_get_soc_id_version(void );
/**
* arm_smccc_get_soc_id_revision ( )
*
* Returns the SOC ID revision .
*
* When ARM_SMCCC_ARCH_SOC_ID is not present , returns SMCCC_RET_NOT_SUPPORTED .
*/
s32 arm_smccc_get_soc_id_revision(void );
#ifndef __ASSEMBLY__
/*
* Returns whether a specific hypervisor UUID is advertised for the
* Vendor Specific Hypervisor Service range .
*/
bool arm_smccc_hypervisor_has_uuid(const uuid_t *uuid);
static inline uuid_t smccc_res_to_uuid(u32 r0, u32 r1, u32 r2, u32 r3)
{
uuid_t uuid = {
.b = {
[0 ] = (r0 >> 0 ) & 0 xff,
[1 ] = (r0 >> 8 ) & 0 xff,
[2 ] = (r0 >> 16 ) & 0 xff,
[3 ] = (r0 >> 24 ) & 0 xff,
[4 ] = (r1 >> 0 ) & 0 xff,
[5 ] = (r1 >> 8 ) & 0 xff,
[6 ] = (r1 >> 16 ) & 0 xff,
[7 ] = (r1 >> 24 ) & 0 xff,
[8 ] = (r2 >> 0 ) & 0 xff,
[9 ] = (r2 >> 8 ) & 0 xff,
[10 ] = (r2 >> 16 ) & 0 xff,
[11 ] = (r2 >> 24 ) & 0 xff,
[12 ] = (r3 >> 0 ) & 0 xff,
[13 ] = (r3 >> 8 ) & 0 xff,
[14 ] = (r3 >> 16 ) & 0 xff,
[15 ] = (r3 >> 24 ) & 0 xff,
},
};
return uuid;
}
static inline u32 smccc_uuid_to_reg(const uuid_t *uuid, int reg)
{
u32 val = 0 ;
val |= (u32)(uuid->b[4 * reg + 0 ] << 0 );
val |= (u32)(uuid->b[4 * reg + 1 ] << 8 );
val |= (u32)(uuid->b[4 * reg + 2 ] << 16 );
val |= (u32)(uuid->b[4 * reg + 3 ] << 24 );
return val;
}
#endif /* !__ASSEMBLY__ */
/**
* struct arm_smccc_res - Result from SMC / HVC call
* @ a0 - a3 result values from registers 0 to 3
*/
struct arm_smccc_res {
unsigned long a0;
unsigned long a1;
unsigned long a2;
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
* @ state : quirk specific information
* @ a6 : Qualcomm quirk entry for returning post - smc call contents of a6
*/
struct arm_smccc_quirk {
int id;
union {
unsigned long a6;
} state;
};
/**
* _ _ arm_smccc_smc ( ) - make SMC calls
* @ a0 - a7 : arguments passed in registers 0 to 7
* @ res : result values from registers 0 to 3
* @ quirk : points to an arm_smccc_quirk , or NULL when no quirks are required .
*
* This function is used to make SMC calls following SMC Calling Convention .
* The content of the supplied param are copied to registers 0 to 7 prior
* to the SMC instruction . The return values are updated with the content
* 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
* @ a0 - a7 : arguments passed in registers 0 to 7
* @ res : result values from registers 0 to 3
* @ quirk : points to an arm_smccc_quirk , or NULL when no quirks are required .
*
* This function is used to make HVC calls following SMC Calling
* Convention . The content of the supplied param are copied to registers 0
* to 7 prior to the HVC instruction . The return values are updated with
* the content from register 0 to 3 on return from the HVC instruction . An
* optional quirk structure provides vendor specific behavior .
*/
asmlinkage void __arm_smccc_hvc(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);
#define arm_smccc_smc(...) __arm_smccc_smc(__VA_ARGS__, NULL)
#define arm_smccc_smc_quirk(...) __arm_smccc_smc(__VA_ARGS__)
#define arm_smccc_hvc(...) __arm_smccc_hvc(__VA_ARGS__, NULL)
#define arm_smccc_hvc_quirk(...) __arm_smccc_hvc(__VA_ARGS__)
/* SMCCC v1.1 implementation madness follows */
#ifdef CONFIG_ARM64
#define SMCCC_SMC_INST "smc #0"
#define SMCCC_HVC_INST "hvc #0"
#elif defined (CONFIG_ARM)
#include <asm /opcodes-sec.h>
#include <asm /opcodes-virt.h>
#define SMCCC_SMC_INST __SMC(0 )
#define SMCCC_HVC_INST __HVC(0 )
#endif
#define __constraint_read_2 "r" (arg0)
#define __constraint_read_3 __constraint_read_2, "r" (arg1)
#define __constraint_read_4 __constraint_read_3, "r" (arg2)
#define __constraint_read_5 __constraint_read_4, "r" (arg3)
#define __constraint_read_6 __constraint_read_5, "r" (arg4)
#define __constraint_read_7 __constraint_read_6, "r" (arg5)
#define __constraint_read_8 __constraint_read_7, "r" (arg6)
#define __constraint_read_9 __constraint_read_8, "r" (arg7)
#define __declare_arg_2(a0, res) \
struct arm_smccc_res *___res = res; \
register unsigned long arg0 asm ("r0" ) = (u32)a0
#define __declare_arg_3(a0, a1, res) \
typeof(a1) __a1 = a1; \
struct arm_smccc_res *___res = res; \
register unsigned long arg0 asm ("r0" ) = (u32)a0; \
register typeof(a1) arg1 asm ("r1" ) = __a1
#define __declare_arg_4(a0, a1, a2, res) \
typeof(a1) __a1 = a1; \
typeof(a2) __a2 = a2; \
struct arm_smccc_res *___res = res; \
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_5(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 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_6(a0, a1, a2, a3, a4, res) \
typeof(a4) __a4 = a4; \
__declare_arg_5(a0, a1, a2, a3, res); \
register typeof(a4) arg4 asm ("r4" ) = __a4
#define __declare_arg_7(a0, a1, a2, a3, a4, a5, res) \
typeof(a5) __a5 = a5; \
__declare_arg_6(a0, a1, a2, a3, a4, res); \
register typeof(a5) arg5 asm ("r5" ) = __a5
#define __declare_arg_8(a0, a1, a2, a3, a4, a5, a6, res) \
typeof(a6) __a6 = a6; \
__declare_arg_7(a0, a1, a2, a3, a4, a5, res); \
register typeof(a6) arg6 asm ("r6" ) = __a6
#define __declare_arg_9(a0, a1, a2, a3, a4, a5, a6, a7, res) \
typeof(a7) __a7 = a7; \
__declare_arg_8(a0, a1, a2, a3, a4, a5, a6, res); \
register typeof(a7) arg7 asm ("r7" ) = __a7
/*
* We have an output list that is not necessarily used , and GCC feels
* entitled to optimise the whole sequence away . " volatile " is what
* makes it stick .
*/
#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" ); \
CONCATENATE(__declare_arg_, \
COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__); \
asm volatile (inst "\n" : \
"=r" (r0), "=r" (r1), "=r" (r2), "=r" (r3) \
: CONCATENATE(__constraint_read_, \
COUNT_ARGS(__VA_ARGS__)) \
: "memory" ); \
if (___res) \
*___res = (typeof(*___res)){r0, r1, r2, r3}; \
} while (0 )
/*
* arm_smccc_1_1_smc ( ) - make an SMCCC v1 . 1 compliant SMC call
*
* This is a variadic macro taking one to eight source arguments , and
* an optional return structure .
*
* @ a0 - a7 : arguments passed in registers 0 to 7
* @ res : result values from registers 0 to 3
*
* This macro is used to make SMC calls following SMC Calling Convention v1 . 1 .
* The content of the supplied param are copied to registers 0 to 7 prior
* to the SMC instruction . The return values are updated with the content
* from register 0 to 3 on return from the SMC instruction if not NULL .
*/
#define arm_smccc_1_1_smc(...) __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__)
/*
* arm_smccc_1_1_hvc ( ) - make an SMCCC v1 . 1 compliant HVC call
*
* This is a variadic macro taking one to eight source arguments , and
* an optional return structure .
*
* @ a0 - a7 : arguments passed in registers 0 to 7
* @ res : result values from registers 0 to 3
*
* This macro is used to make HVC calls following SMC Calling Convention v1 . 1 .
* The content of the supplied param are copied to registers 0 to 7 prior
* to the HVC instruction . The return values are updated with the content
* from register 0 to 3 on return from the HVC instruction if not NULL .
*/
#define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
/*
* Like arm_smccc_1_1 * but always returns SMCCC_RET_NOT_SUPPORTED .
* Used when the SMCCC conduit is not defined . The empty asm statement
* avoids compiler warnings about unused variables .
*/
#define __fail_smccc_1_1(...) \
do { \
CONCATENATE(__declare_arg_, \
COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__); \
asm ("" : \
: CONCATENATE(__constraint_read_, \
COUNT_ARGS(__VA_ARGS__)) \
: "memory" ); \
if (___res) \
___res->a0 = SMCCC_RET_NOT_SUPPORTED; \
} while (0 )
/*
* arm_smccc_1_1_invoke ( ) - make an SMCCC v1 . 1 compliant call
*
* This is a variadic macro taking one to eight source arguments , and
* an optional return structure .
*
* @ a0 - a7 : arguments passed in registers 0 to 7
* @ res : result values from registers 0 to 3
*
* This macro will make either an HVC call or an SMC call depending on the
* current SMCCC conduit . If no valid conduit is available then - 1
* ( SMCCC_RET_NOT_SUPPORTED ) is returned in @ res . a0 ( if supplied ) .
*
* The return value also provides the conduit that was used .
*/
#define arm_smccc_1_1_invoke(...) ({ \
int method = arm_smccc_1_1_get_conduit(); \
switch (method) { \
case SMCCC_CONDUIT_HVC: \
arm_smccc_1_1_hvc(__VA_ARGS__); \
break ; \
case SMCCC_CONDUIT_SMC: \
arm_smccc_1_1_smc(__VA_ARGS__); \
break ; \
default : \
__fail_smccc_1_1(__VA_ARGS__); \
method = SMCCC_CONDUIT_NONE; \
break ; \
} \
method; \
})
#ifdef CONFIG_ARM64
#define __fail_smccc_1_2(___res) \
do { \
if (___res) \
___res->a0 = SMCCC_RET_NOT_SUPPORTED; \
} while (0 )
/*
* arm_smccc_1_2_invoke ( ) - make an SMCCC v1 . 2 compliant call
*
* @ args : SMC args are in the a0 . . a17 fields of the arm_smcc_1_2_regs structure
* @ res : result values from registers 0 to 17
*
* This macro will make either an HVC call or an SMC call depending on the
* current SMCCC conduit . If no valid conduit is available then - 1
* ( SMCCC_RET_NOT_SUPPORTED ) is returned in @ res . a0 ( if supplied ) .
*
* The return value also provides the conduit that was used .
*/
#define arm_smccc_1_2_invoke(args, res) ({ \
struct arm_smccc_1_2_regs *__args = args; \
struct arm_smccc_1_2_regs *__res = res; \
int method = arm_smccc_1_1_get_conduit(); \
switch (method) { \
case SMCCC_CONDUIT_HVC: \
arm_smccc_1_2_hvc(__args, __res); \
break ; \
case SMCCC_CONDUIT_SMC: \
arm_smccc_1_2_smc(__args, __res); \
break ; \
default : \
__fail_smccc_1_2(__res); \
method = SMCCC_CONDUIT_NONE; \
break ; \
} \
method; \
})
#endif /*CONFIG_ARM64*/
#endif /*__ASSEMBLY__*/
#endif /*__LINUX_ARM_SMCCC_H*/
Messung V0.5 in Prozent C=96 H=76 G=86
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-09-29)
¤
*© Formatika GbR, Deutschland