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arm-trusted-firmware/include/lib/extensions/brbe.h

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feat(brbe): add BRBE support for NS world This patch enables access to the branch record buffer control registers in non-secure EL2 and EL1 using the new build option ENABLE_BRBE_FOR_NS. It is disabled for all secure world, and cannot be used with ENABLE_RME. This option is disabled by default, however, the FVP platform makefile enables it for FVP builds. Signed-off-by: John Powell <john.powell@arm.com> Change-Id: I576a49d446a8a73286ea6417c16bd0b8de71fca0
3 years ago
/*
fix(cpufeat): resolve build errors due to compiler optimization Currently most of the architectural feature build flags are set to 2(FEATURE_STATE_CHECK) for fvp platform only. However other platforms still configure them by default to 0, which would lead to build failures in cases when compiler configured to build TF-A with zero optimization (CFLAGS='-O0'). This patch addresses such build issues and thereby resolves the failures seen under CI-l3 test_configurations. Change-Id: I45b82b821951bba6b9df08177f7d286e624a4239 Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
2 years ago
* Copyright (c) 2022-2023, Arm Limited. All rights reserved.
feat(brbe): add BRBE support for NS world This patch enables access to the branch record buffer control registers in non-secure EL2 and EL1 using the new build option ENABLE_BRBE_FOR_NS. It is disabled for all secure world, and cannot be used with ENABLE_RME. This option is disabled by default, however, the FVP platform makefile enables it for FVP builds. Signed-off-by: John Powell <john.powell@arm.com> Change-Id: I576a49d446a8a73286ea6417c16bd0b8de71fca0
3 years ago
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef BRBE_H
#define BRBE_H
fix(cpufeat): resolve build errors due to compiler optimization Currently most of the architectural feature build flags are set to 2(FEATURE_STATE_CHECK) for fvp platform only. However other platforms still configure them by default to 0, which would lead to build failures in cases when compiler configured to build TF-A with zero optimization (CFLAGS='-O0'). This patch addresses such build issues and thereby resolves the failures seen under CI-l3 test_configurations. Change-Id: I45b82b821951bba6b9df08177f7d286e624a4239 Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
2 years ago
#if ENABLE_BRBE_FOR_NS
feat(brbe): add BRBE support for NS world This patch enables access to the branch record buffer control registers in non-secure EL2 and EL1 using the new build option ENABLE_BRBE_FOR_NS. It is disabled for all secure world, and cannot be used with ENABLE_RME. This option is disabled by default, however, the FVP platform makefile enables it for FVP builds. Signed-off-by: John Powell <john.powell@arm.com> Change-Id: I576a49d446a8a73286ea6417c16bd0b8de71fca0
3 years ago
void brbe_enable(void);
fix(cpufeat): resolve build errors due to compiler optimization Currently most of the architectural feature build flags are set to 2(FEATURE_STATE_CHECK) for fvp platform only. However other platforms still configure them by default to 0, which would lead to build failures in cases when compiler configured to build TF-A with zero optimization (CFLAGS='-O0'). This patch addresses such build issues and thereby resolves the failures seen under CI-l3 test_configurations. Change-Id: I45b82b821951bba6b9df08177f7d286e624a4239 Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
2 years ago
#else
fix(cpufeat): make stub enable functions "static inline" For builds where we don't have a certain feature enabled, we provide empty stub xxx_enable() functions in a header file. This way we avoid #ifdef's in the code, and can call the enable function unconditionally. When compiling with -O1 or higher, the compiler will even optimise out the whole call, so the symbol will never make it into any object file. When compiling with optimisations turned off, the function stub will survive, and could make it into multiple object files, which would lead to a multiple definitons error. Avoid this by defining those stub functions as "static inline". The "static" will avoid the multiple definitions problems, the "inline" will avoid a potential compiler warning about unused functions. This patterns is used extensively in the Linux kernel. Change-Id: Iad07bb946aab372587c83f2423b4983bf3817990 Reported-by: Chris Kay <chris.kay@arm.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
2 years ago
static inline void brbe_enable(void)
fix(cpufeat): resolve build errors due to compiler optimization Currently most of the architectural feature build flags are set to 2(FEATURE_STATE_CHECK) for fvp platform only. However other platforms still configure them by default to 0, which would lead to build failures in cases when compiler configured to build TF-A with zero optimization (CFLAGS='-O0'). This patch addresses such build issues and thereby resolves the failures seen under CI-l3 test_configurations. Change-Id: I45b82b821951bba6b9df08177f7d286e624a4239 Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
2 years ago
{
}
#endif /* ENABLE_BRBE_FOR_NS */
feat(brbe): add BRBE support for NS world This patch enables access to the branch record buffer control registers in non-secure EL2 and EL1 using the new build option ENABLE_BRBE_FOR_NS. It is disabled for all secure world, and cannot be used with ENABLE_RME. This option is disabled by default, however, the FVP platform makefile enables it for FVP builds. Signed-off-by: John Powell <john.powell@arm.com> Change-Id: I576a49d446a8a73286ea6417c16bd0b8de71fca0
3 years ago
#endif /* BRBE_H */