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linux/arch/arm64/kernel/smccc-call.S

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-27 08:55:21 +02:00
/* SPDX-License-Identifier: GPL-2.0-only */
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
/*
* Copyright (c) 2015, Linaro Limited
*/
#include <linux/linkage.h>
firmware: qcom: scm: Fix interrupted SCM calls This patch adds a Qualcomm specific quirk to the arm_smccc_smc call. On Qualcomm ARM64 platforms, the SMC call can return before it has completed. If this occurs, the call can be restarted, but it requires using the returned session ID value from the interrupted SMC call. The quirk stores off the session ID from the interrupted call in the quirk structure so that it can be used by the caller. This patch folds in a fix given by Sricharan R: https://lkml.org/lkml/2016/9/28/272 Signed-off-by: Andy Gross <andy.gross@linaro.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-02-01 11:28:28 -06:00
#include <linux/arm-smccc.h>
arm64: smccc: use asm EXPORT_SYMBOL() For a while now it's been possible to use EXPORT_SYMBOL() in assembly files, which allows us to place exports immediately after assembly functions, as we do for C functions. As a step towards removing arm64ksyms.c, let's move the SMCCC exports to the assembly file the functions are defined in. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-12-07 18:08:18 +00:00
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
#include <asm/asm-offsets.h>
arm64: smccc: use asm EXPORT_SYMBOL() For a while now it's been possible to use EXPORT_SYMBOL() in assembly files, which allows us to place exports immediately after assembly functions, as we do for C functions. As a step towards removing arm64ksyms.c, let's move the SMCCC exports to the assembly file the functions are defined in. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-12-07 18:08:18 +00:00
#include <asm/assembler.h>
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
.macro SMCCC instr
.cfi_startproc
\instr #0
ldr x4, [sp]
stp x0, x1, [x4, #ARM_SMCCC_RES_X0_OFFS]
stp x2, x3, [x4, #ARM_SMCCC_RES_X2_OFFS]
firmware: qcom: scm: Fix interrupted SCM calls This patch adds a Qualcomm specific quirk to the arm_smccc_smc call. On Qualcomm ARM64 platforms, the SMC call can return before it has completed. If this occurs, the call can be restarted, but it requires using the returned session ID value from the interrupted SMC call. The quirk stores off the session ID from the interrupted call in the quirk structure so that it can be used by the caller. This patch folds in a fix given by Sricharan R: https://lkml.org/lkml/2016/9/28/272 Signed-off-by: Andy Gross <andy.gross@linaro.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-02-01 11:28:28 -06:00
ldr x4, [sp, #8]
cbz x4, 1f /* no quirk structure */
ldr x9, [x4, #ARM_SMCCC_QUIRK_ID_OFFS]
cmp x9, #ARM_SMCCC_QUIRK_QCOM_A6
b.ne 1f
str x6, [x4, ARM_SMCCC_QUIRK_STATE_OFFS]
1: ret
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
.cfi_endproc
.endm
/*
* void arm_smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
* unsigned long a3, unsigned long a4, unsigned long a5,
arm: kernel: Add SMC structure parameter This patch adds a quirk parameter to the arm_smccc_(smc/hvc) calls. The quirk structure allows for specialized SMC operations due to SoC specific requirements. The current arm_smccc_(smc/hvc) is renamed and macros are used instead to specify the standard arm_smccc_(smc/hvc) or the arm_smccc_(smc/hvc)_quirk function. This patch and partial implementation was suggested by Will Deacon. Signed-off-by: Andy Gross <andy.gross@linaro.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-02-01 11:28:27 -06:00
* unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
* struct arm_smccc_quirk *quirk)
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
*/
arm64: kernel: Convert to modern annotations for assembly functions In an effort to clarify and simplify the annotation of assembly functions in the kernel new macros have been introduced. These replace ENTRY and ENDPROC and also add a new annotation for static functions which previously had no ENTRY equivalent. Update the annotations in the core kernel code to the new macros. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20200501115430.37315-3-broonie@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
2020-05-01 12:54:29 +01:00
SYM_FUNC_START(__arm_smccc_smc)
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
SMCCC smc
arm64: kernel: Convert to modern annotations for assembly functions In an effort to clarify and simplify the annotation of assembly functions in the kernel new macros have been introduced. These replace ENTRY and ENDPROC and also add a new annotation for static functions which previously had no ENTRY equivalent. Update the annotations in the core kernel code to the new macros. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20200501115430.37315-3-broonie@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
2020-05-01 12:54:29 +01:00
SYM_FUNC_END(__arm_smccc_smc)
arm64: smccc: use asm EXPORT_SYMBOL() For a while now it's been possible to use EXPORT_SYMBOL() in assembly files, which allows us to place exports immediately after assembly functions, as we do for C functions. As a step towards removing arm64ksyms.c, let's move the SMCCC exports to the assembly file the functions are defined in. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-12-07 18:08:18 +00:00
EXPORT_SYMBOL(__arm_smccc_smc)
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
/*
* void arm_smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
* unsigned long a3, unsigned long a4, unsigned long a5,
arm: kernel: Add SMC structure parameter This patch adds a quirk parameter to the arm_smccc_(smc/hvc) calls. The quirk structure allows for specialized SMC operations due to SoC specific requirements. The current arm_smccc_(smc/hvc) is renamed and macros are used instead to specify the standard arm_smccc_(smc/hvc) or the arm_smccc_(smc/hvc)_quirk function. This patch and partial implementation was suggested by Will Deacon. Signed-off-by: Andy Gross <andy.gross@linaro.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-02-01 11:28:27 -06:00
* unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
* struct arm_smccc_quirk *quirk)
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
*/
arm64: kernel: Convert to modern annotations for assembly functions In an effort to clarify and simplify the annotation of assembly functions in the kernel new macros have been introduced. These replace ENTRY and ENDPROC and also add a new annotation for static functions which previously had no ENTRY equivalent. Update the annotations in the core kernel code to the new macros. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20200501115430.37315-3-broonie@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
2020-05-01 12:54:29 +01:00
SYM_FUNC_START(__arm_smccc_hvc)
ARM: 8480/2: arm64: add implementation for arm-smccc Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04 15:44:32 +01:00
SMCCC hvc
arm64: kernel: Convert to modern annotations for assembly functions In an effort to clarify and simplify the annotation of assembly functions in the kernel new macros have been introduced. These replace ENTRY and ENDPROC and also add a new annotation for static functions which previously had no ENTRY equivalent. Update the annotations in the core kernel code to the new macros. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20200501115430.37315-3-broonie@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
2020-05-01 12:54:29 +01:00
SYM_FUNC_END(__arm_smccc_hvc)
arm64: smccc: use asm EXPORT_SYMBOL() For a while now it's been possible to use EXPORT_SYMBOL() in assembly files, which allows us to place exports immediately after assembly functions, as we do for C functions. As a step towards removing arm64ksyms.c, let's move the SMCCC exports to the assembly file the functions are defined in. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-12-07 18:08:18 +00:00
EXPORT_SYMBOL(__arm_smccc_hvc)
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