| Message ID | 20210727005248.1827411-3-Rodrigo.Siqueira@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/amd/display: Introduce FPU directory inside DC | expand |
Am 27.07.21 um 02:52 schrieb Rodrigo Siqueira: > DC invokes DC_FPU_START/END in multiple parts of the code; this can > create a situation where we invoke this FPU operation in a nested way or > exit too early. For avoiding this situation, this commit adds a > mechanism where dc_fpu_begin/end manages the access to > kernel_fpu_begin/end. > > Change since V3: > - Christian: Move PPC64 code to dc_fpu_begin/end. > > Change since V2: > - Christian: Do not use this_cpu_* between get/put_cpu_ptr(). > > Change since V1: > - Use a better variable names > - Use get_cpu_ptr and put_cpu_ptr to better balance preemption enable > and disable > > Cc: Harry Wentland <harry.wentland@amd.com> > Cc: Anson Jacob <Anson.Jacob@amd.com> > Cc: Christian König <christian.koenig@amd.com> > Cc: Hersen Wu <hersenxs.wu@amd.com> > Cc: Aric Cyr <aric.cyr@amd.com> > Cc: Jun Lei <jun.lei@amd.com> > Cc: Dmytro Laktyushkin <dmytro.laktyushkin@amd.com> > Cc: Qingqing Zhuo <qingqing.zhuo@amd.com> > Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> > --- > .../gpu/drm/amd/display/amdgpu_dm/Makefile | 4 + > .../amd/display/amdgpu_dm/amdgpu_dm_trace.h | 21 ++++ > .../gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 96 +++++++++++++++++++ > .../gpu/drm/amd/display/amdgpu_dm/dc_fpu.h | 33 +++++++ > drivers/gpu/drm/amd/display/dc/dc_trace.h | 3 + > drivers/gpu/drm/amd/display/dc/os_types.h | 35 +------ > 6 files changed, 160 insertions(+), 32 deletions(-) > create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c > create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h > > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile b/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile > index 91fb72c96545..718e123a3230 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile > @@ -27,6 +27,10 @@ > > AMDGPUDM = amdgpu_dm.o amdgpu_dm_irq.o amdgpu_dm_mst_types.o amdgpu_dm_color.o > > +ifdef CONFIG_DRM_AMD_DC_DCN > +AMDGPUDM += dc_fpu.o > +endif > + > ifneq ($(CONFIG_DRM_AMD_DC),) > AMDGPUDM += amdgpu_dm_services.o amdgpu_dm_helpers.o amdgpu_dm_pp_smu.o amdgpu_dm_psr.o > endif > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h > index 46a33f64cf8e..230bb12c405e 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h > @@ -637,6 +637,27 @@ TRACE_EVENT(amdgpu_refresh_rate_track, > __entry->refresh_rate_ns) > ); > > +TRACE_EVENT(dcn_fpu, > + TP_PROTO(bool begin, const char *function, const int line), > + TP_ARGS(begin, function, line), > + > + TP_STRUCT__entry( > + __field(bool, begin) > + __field(const char *, function) > + __field(int, line) > + ), > + TP_fast_assign( > + __entry->begin = begin; > + __entry->function = function; > + __entry->line = line; > + ), > + TP_printk("%s()+%d: %s", > + __entry->function, > + __entry->line, > + __entry->begin ? "begin" : "end" > + ) > +); > + > #endif /* _AMDGPU_DM_TRACE_H_ */ > > #undef TRACE_INCLUDE_PATH > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c > new file mode 100644 > index 000000000000..d4ab27bf8d04 > --- /dev/null > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c > @@ -0,0 +1,96 @@ > +// SPDX-License-Identifier: MIT > +/* > + * Copyright 2021 Advanced Micro Devices, Inc. > + * > + * Permission is hereby granted, free of charge, to any person obtaining a > + * copy of this software and associated documentation files (the "Software"), > + * to deal in the Software without restriction, including without limitation > + * the rights to use, copy, modify, merge, publish, distribute, sublicense, > + * and/or sell copies of the Software, and to permit persons to whom the > + * Software is furnished to do so, subject to the following conditions: > + * > + * The above copyright notice and this permission notice shall be included in > + * all copies or substantial portions of the Software. > + * > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL > + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR > + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, > + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR > + * OTHER DEALINGS IN THE SOFTWARE. > + * > + * Authors: AMD > + * > + */ > + > +#include "dc_trace.h" > + > +#if defined(CONFIG_X86) > +#include <asm/fpu/api.h> > +#elif defined(CONFIG_PPC64) > +#include <asm/switch_to.h> > +#include <asm/cputable.h> > +#endif > + > +/** > + * dc_fpu_begin - Enables FPU protection > + * @function_name: A string containing the function name for debug purposes > + * (usually __func__) > + * > + * @line: A line number where DC_FP_START was invoked for debug purpose > + * (usually __LINE__) > + * > + * This function is responsible for managing the use of kernel_fpu_begin() with > + * the advantage of providing an event trace for debugging. > + * > + * Note: Do not call this function directly; always use DC_FP_START(). > + */ > +void dc_fpu_begin(const char *function_name, const int line) > +{ > + TRACE_DCN_FPU(true, function_name, line); > + > +#if defined(CONFIG_X86) > + kernel_fpu_begin(); > +#elif defined(CONFIG_PPC64) > + if (cpu_has_feature(CPU_FTR_VSX_COMP)) { > + preempt_disable(); > + enable_kernel_vsx(); > + } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { > + preempt_disable(); > + enable_kernel_altivec(); > + } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { > + preempt_disable(); > + enable_kernel_fp(); > + } > +#endif > +} > + > +/** > + * dc_fpu_end - Disable FPU protection > + * @function_name: A string containing the function name for debug purposes > + * @line: A-line number where DC_FP_END was invoked for debug purpose > + * > + * This function is responsible for managing the use of kernel_fpu_end() with > + * the advantage of providing an event trace for debugging. > + * > + * Note: Do not call this function directly; always use DC_FP_END(). > + */ > +void dc_fpu_end(const char *function_name, const int line) > +{ > + TRACE_DCN_FPU(false, function_name, line); > +#if defined(CONFIG_X86) > + kernel_fpu_end(); > +#elif defined(CONFIG_PPC64) > + if (cpu_has_feature(CPU_FTR_VSX_COMP)) { > + disable_kernel_vsx(); > + preempt_enable(); > + } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { > + disable_kernel_altivec(); > + preempt_enable(); > + } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { > + disable_kernel_fp(); > + preempt_enable(); > + } > +#endif > +} > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h > new file mode 100644 > index 000000000000..fb54983c5c60 > --- /dev/null > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h > @@ -0,0 +1,33 @@ > +/* SPDX-License-Identifier: MIT */ > +/* > + * Copyright 2021 Advanced Micro Devices, Inc. > + * > + * Permission is hereby granted, free of charge, to any person obtaining a > + * copy of this software and associated documentation files (the "Software"), > + * to deal in the Software without restriction, including without limitation > + * the rights to use, copy, modify, merge, publish, distribute, sublicense, > + * and/or sell copies of the Software, and to permit persons to whom the > + * Software is furnished to do so, subject to the following conditions: > + * > + * The above copyright notice and this permission notice shall be included in > + * all copies or substantial portions of the Software. > + * > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL > + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR > + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, > + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR > + * OTHER DEALINGS IN THE SOFTWARE. > + * > + * Authors: AMD > + * > + */ > + > +#ifndef __DC_FPU_H__ > +#define __DC_FPU_H__ > + > +void dc_fpu_begin(const char *function_name, const int line); > +void dc_fpu_end(const char *function_name, const int line); > + > +#endif /* __DC_FPU_H__ */ > diff --git a/drivers/gpu/drm/amd/display/dc/dc_trace.h b/drivers/gpu/drm/amd/display/dc/dc_trace.h > index d2615357269b..d598ba697e45 100644 > --- a/drivers/gpu/drm/amd/display/dc/dc_trace.h > +++ b/drivers/gpu/drm/amd/display/dc/dc_trace.h > @@ -37,3 +37,6 @@ > > #define TRACE_DCN_CLOCK_STATE(dcn_clocks) \ > trace_amdgpu_dm_dc_clocks_state(dcn_clocks) > + > +#define TRACE_DCN_FPU(begin, function, line) \ > + trace_dcn_fpu(begin, function, line) > diff --git a/drivers/gpu/drm/amd/display/dc/os_types.h b/drivers/gpu/drm/amd/display/dc/os_types.h > index 126c2f3a4dd3..f50cae252de4 100644 > --- a/drivers/gpu/drm/amd/display/dc/os_types.h > +++ b/drivers/gpu/drm/amd/display/dc/os_types.h > @@ -51,38 +51,9 @@ > #define dm_error(fmt, ...) DRM_ERROR(fmt, ##__VA_ARGS__) > > #if defined(CONFIG_DRM_AMD_DC_DCN) > -#if defined(CONFIG_X86) > -#include <asm/fpu/api.h> > -#define DC_FP_START() kernel_fpu_begin() > -#define DC_FP_END() kernel_fpu_end() > -#elif defined(CONFIG_PPC64) > -#include <asm/switch_to.h> > -#include <asm/cputable.h> > -#define DC_FP_START() { \ > - if (cpu_has_feature(CPU_FTR_VSX_COMP)) { \ > - preempt_disable(); \ > - enable_kernel_vsx(); \ > - } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { \ > - preempt_disable(); \ > - enable_kernel_altivec(); \ > - } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { \ > - preempt_disable(); \ > - enable_kernel_fp(); \ > - } \ > -} > -#define DC_FP_END() { \ > - if (cpu_has_feature(CPU_FTR_VSX_COMP)) { \ > - disable_kernel_vsx(); \ > - preempt_enable(); \ > - } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { \ > - disable_kernel_altivec(); \ > - preempt_enable(); \ > - } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { \ > - disable_kernel_fp(); \ > - preempt_enable(); \ > - } \ > -} > -#endif > +#include "amdgpu_dm/dc_fpu.h" > +#define DC_FP_START() dc_fpu_begin(__func__, __LINE__) > +#define DC_FP_END() dc_fpu_end(__func__, __LINE__) > #endif > > /*
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile b/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile index 91fb72c96545..718e123a3230 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/Makefile @@ -27,6 +27,10 @@ AMDGPUDM = amdgpu_dm.o amdgpu_dm_irq.o amdgpu_dm_mst_types.o amdgpu_dm_color.o +ifdef CONFIG_DRM_AMD_DC_DCN +AMDGPUDM += dc_fpu.o +endif + ifneq ($(CONFIG_DRM_AMD_DC),) AMDGPUDM += amdgpu_dm_services.o amdgpu_dm_helpers.o amdgpu_dm_pp_smu.o amdgpu_dm_psr.o endif diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h index 46a33f64cf8e..230bb12c405e 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h @@ -637,6 +637,27 @@ TRACE_EVENT(amdgpu_refresh_rate_track, __entry->refresh_rate_ns) ); +TRACE_EVENT(dcn_fpu, + TP_PROTO(bool begin, const char *function, const int line), + TP_ARGS(begin, function, line), + + TP_STRUCT__entry( + __field(bool, begin) + __field(const char *, function) + __field(int, line) + ), + TP_fast_assign( + __entry->begin = begin; + __entry->function = function; + __entry->line = line; + ), + TP_printk("%s()+%d: %s", + __entry->function, + __entry->line, + __entry->begin ? "begin" : "end" + ) +); + #endif /* _AMDGPU_DM_TRACE_H_ */ #undef TRACE_INCLUDE_PATH diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c new file mode 100644 index 000000000000..d4ab27bf8d04 --- /dev/null +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright 2021 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#include "dc_trace.h" + +#if defined(CONFIG_X86) +#include <asm/fpu/api.h> +#elif defined(CONFIG_PPC64) +#include <asm/switch_to.h> +#include <asm/cputable.h> +#endif + +/** + * dc_fpu_begin - Enables FPU protection + * @function_name: A string containing the function name for debug purposes + * (usually __func__) + * + * @line: A line number where DC_FP_START was invoked for debug purpose + * (usually __LINE__) + * + * This function is responsible for managing the use of kernel_fpu_begin() with + * the advantage of providing an event trace for debugging. + * + * Note: Do not call this function directly; always use DC_FP_START(). + */ +void dc_fpu_begin(const char *function_name, const int line) +{ + TRACE_DCN_FPU(true, function_name, line); + +#if defined(CONFIG_X86) + kernel_fpu_begin(); +#elif defined(CONFIG_PPC64) + if (cpu_has_feature(CPU_FTR_VSX_COMP)) { + preempt_disable(); + enable_kernel_vsx(); + } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { + preempt_disable(); + enable_kernel_altivec(); + } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { + preempt_disable(); + enable_kernel_fp(); + } +#endif +} + +/** + * dc_fpu_end - Disable FPU protection + * @function_name: A string containing the function name for debug purposes + * @line: A-line number where DC_FP_END was invoked for debug purpose + * + * This function is responsible for managing the use of kernel_fpu_end() with + * the advantage of providing an event trace for debugging. + * + * Note: Do not call this function directly; always use DC_FP_END(). + */ +void dc_fpu_end(const char *function_name, const int line) +{ + TRACE_DCN_FPU(false, function_name, line); +#if defined(CONFIG_X86) + kernel_fpu_end(); +#elif defined(CONFIG_PPC64) + if (cpu_has_feature(CPU_FTR_VSX_COMP)) { + disable_kernel_vsx(); + preempt_enable(); + } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { + disable_kernel_altivec(); + preempt_enable(); + } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { + disable_kernel_fp(); + preempt_enable(); + } +#endif +} diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h new file mode 100644 index 000000000000..fb54983c5c60 --- /dev/null +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright 2021 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#ifndef __DC_FPU_H__ +#define __DC_FPU_H__ + +void dc_fpu_begin(const char *function_name, const int line); +void dc_fpu_end(const char *function_name, const int line); + +#endif /* __DC_FPU_H__ */ diff --git a/drivers/gpu/drm/amd/display/dc/dc_trace.h b/drivers/gpu/drm/amd/display/dc/dc_trace.h index d2615357269b..d598ba697e45 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_trace.h +++ b/drivers/gpu/drm/amd/display/dc/dc_trace.h @@ -37,3 +37,6 @@ #define TRACE_DCN_CLOCK_STATE(dcn_clocks) \ trace_amdgpu_dm_dc_clocks_state(dcn_clocks) + +#define TRACE_DCN_FPU(begin, function, line) \ + trace_dcn_fpu(begin, function, line) diff --git a/drivers/gpu/drm/amd/display/dc/os_types.h b/drivers/gpu/drm/amd/display/dc/os_types.h index 126c2f3a4dd3..f50cae252de4 100644 --- a/drivers/gpu/drm/amd/display/dc/os_types.h +++ b/drivers/gpu/drm/amd/display/dc/os_types.h @@ -51,38 +51,9 @@ #define dm_error(fmt, ...) DRM_ERROR(fmt, ##__VA_ARGS__) #if defined(CONFIG_DRM_AMD_DC_DCN) -#if defined(CONFIG_X86) -#include <asm/fpu/api.h> -#define DC_FP_START() kernel_fpu_begin() -#define DC_FP_END() kernel_fpu_end() -#elif defined(CONFIG_PPC64) -#include <asm/switch_to.h> -#include <asm/cputable.h> -#define DC_FP_START() { \ - if (cpu_has_feature(CPU_FTR_VSX_COMP)) { \ - preempt_disable(); \ - enable_kernel_vsx(); \ - } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { \ - preempt_disable(); \ - enable_kernel_altivec(); \ - } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { \ - preempt_disable(); \ - enable_kernel_fp(); \ - } \ -} -#define DC_FP_END() { \ - if (cpu_has_feature(CPU_FTR_VSX_COMP)) { \ - disable_kernel_vsx(); \ - preempt_enable(); \ - } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { \ - disable_kernel_altivec(); \ - preempt_enable(); \ - } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { \ - disable_kernel_fp(); \ - preempt_enable(); \ - } \ -} -#endif +#include "amdgpu_dm/dc_fpu.h" +#define DC_FP_START() dc_fpu_begin(__func__, __LINE__) +#define DC_FP_END() dc_fpu_end(__func__, __LINE__) #endif /*
DC invokes DC_FPU_START/END in multiple parts of the code; this can create a situation where we invoke this FPU operation in a nested way or exit too early. For avoiding this situation, this commit adds a mechanism where dc_fpu_begin/end manages the access to kernel_fpu_begin/end. Change since V3: - Christian: Move PPC64 code to dc_fpu_begin/end. Change since V2: - Christian: Do not use this_cpu_* between get/put_cpu_ptr(). Change since V1: - Use a better variable names - Use get_cpu_ptr and put_cpu_ptr to better balance preemption enable and disable Cc: Harry Wentland <harry.wentland@amd.com> Cc: Anson Jacob <Anson.Jacob@amd.com> Cc: Christian König <christian.koenig@amd.com> Cc: Hersen Wu <hersenxs.wu@amd.com> Cc: Aric Cyr <aric.cyr@amd.com> Cc: Jun Lei <jun.lei@amd.com> Cc: Dmytro Laktyushkin <dmytro.laktyushkin@amd.com> Cc: Qingqing Zhuo <qingqing.zhuo@amd.com> Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> --- .../gpu/drm/amd/display/amdgpu_dm/Makefile | 4 + .../amd/display/amdgpu_dm/amdgpu_dm_trace.h | 21 ++++ .../gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 96 +++++++++++++++++++ .../gpu/drm/amd/display/amdgpu_dm/dc_fpu.h | 33 +++++++ drivers/gpu/drm/amd/display/dc/dc_trace.h | 3 + drivers/gpu/drm/amd/display/dc/os_types.h | 35 +------ 6 files changed, 160 insertions(+), 32 deletions(-) create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c create mode 100644 drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h