Loading arch/arm64/Kconfig +21 −0 Original line number Diff line number Diff line Loading @@ -495,9 +495,20 @@ config ARM64_ICACHE_DISABLE If you are not sure what to do, select 'N' here. config MSM_APP_API bool "API support to enable / disable app settings for MSM8996" depends on ARCH_MSM8996 && (ENABLE_FP_SIMD_SETTINGS || MSM_APP_SETTINGS) help Add API support to enable / disable the app settings to be used at runtime. These APIs are used to enable / disable app setting when specific aarch32 or aarch64 processes are running. If you are not sure what to do, select 'N' here. config ENABLE_FP_SIMD_SETTINGS bool "Enable FP(Floating Point) Settings for Qualcomm MSM8996" depends on ARCH_MSM8996 select MSM_APP_API help Enable FP(Floating Point) and SIMD settings for the MSM8996 during the execution of the aarch32 processes and disable these settings Loading @@ -505,6 +516,16 @@ config ENABLE_FP_SIMD_SETTINGS If you are not sure what to do, select 'N' here. config MSM_APP_SETTINGS bool "Support to enable / disable app settings for MSM8996" depends on ARCH_MSM8996 select MSM_APP_API help Expose an interface used by the userspace at runtime to enable / disable the app specific settings. If you are not sure what to do, select 'N' here. choice prompt "Virtual address space size" default ARM64_VA_BITS_39 if ARM64_4K_PAGES Loading arch/arm64/include/asm/app_api.h 0 → 100644 +42 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only 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. */ #ifndef __ASM_APP_API_H #define __ASM_APP_API_H #include <linux/types.h> #define APP_SETTING_BIT 30 #define MAX_ENTRIES 10 /* * APIs to set / clear the app setting bits * in the register. */ #ifdef CONFIG_MSM_APP_API extern void set_app_setting_bit(uint32_t bit); extern void clear_app_setting_bit(uint32_t bit); #else static inline void set_app_setting_bit(uint32_t bit) {} static inline void clear_app_setting_bit(uint32_t bit) {} #endif #ifdef CONFIG_MSM_APP_SETTINGS extern void get_lib_names(char *names[], unsigned int *cnt); #else static inline void get_lib_names(char *names[], unsigned int *cnt) { *cnt = 0; } #endif #endif arch/arm64/include/asm/fpsimd.h +0 −4 Original line number Diff line number Diff line Loading @@ -84,13 +84,9 @@ extern void fpsimd_load_partial_state(struct fpsimd_partial_state *state); #ifdef CONFIG_ENABLE_FP_SIMD_SETTINGS extern void fpsimd_disable_trap(void); extern void fpsimd_enable_trap(void); extern void fpsimd_settings_disable(void); extern void fpsimd_settings_enable(void); #else static inline void fpsimd_disable_trap(void) {} static inline void fpsimd_enable_trap(void) {} static inline void fpsimd_settings_disable(void) {} static inline void fpsimd_settings_enable(void) {} #endif #endif Loading arch/arm64/kernel/Makefile +2 −0 Original line number Diff line number Diff line Loading @@ -38,6 +38,8 @@ arm64-obj-$(CONFIG_KGDB) += kgdb.o arm64-obj-$(CONFIG_EFI) += efi.o efi-stub.o efi-entry.o arm64-obj-$(CONFIG_PCI) += pci.o arm64-obj-$(CONFIG_ARMV8_DEPRECATED) += armv8_deprecated.o arm64-obj-$(CONFIG_MSM_APP_API) += app_api.o arm64-obj-$(CONFIG_MSM_APP_SETTINGS) += app_setting.o obj-y += $(arm64-obj-y) vdso/ obj-m += $(arm64-obj-m) Loading arch/arm64/kernel/app_api.c 0 → 100644 +75 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only 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. */ #include <linux/bitops.h> #include <linux/spinlock.h> #include <linux/cpu.h> #include <linux/export.h> #include <asm/app_api.h> static spinlock_t spinlock; static DEFINE_PER_CPU(int, app_config_applied); static unsigned long app_config_set[NR_CPUS]; static unsigned long app_config_clear[NR_CPUS]; void set_app_setting_bit(uint32_t bit) { unsigned long flags; uint64_t reg; int cpu; spin_lock_irqsave(&spinlock, flags); asm volatile("mrs %0, S3_1_C15_C15_0" : "=r" (reg)); reg = reg | BIT(bit); isb(); asm volatile("msr S3_1_C15_C15_0, %0" : : "r" (reg)); isb(); if (bit == APP_SETTING_BIT) { cpu = raw_smp_processor_id(); app_config_set[cpu]++; this_cpu_write(app_config_applied, 1); } spin_unlock_irqrestore(&spinlock, flags); } EXPORT_SYMBOL(set_app_setting_bit); void clear_app_setting_bit(uint32_t bit) { unsigned long flags; uint64_t reg; int cpu; spin_lock_irqsave(&spinlock, flags); asm volatile("mrs %0, S3_1_C15_C15_0" : "=r" (reg)); reg = reg & ~BIT(bit); isb(); asm volatile("msr S3_1_C15_C15_0, %0" : : "r" (reg)); isb(); if (bit == APP_SETTING_BIT) { cpu = raw_smp_processor_id(); app_config_clear[cpu]++; this_cpu_write(app_config_applied, 0); } spin_unlock_irqrestore(&spinlock, flags); } EXPORT_SYMBOL(clear_app_setting_bit); static int __init init_app_api(void) { spin_lock_init(&spinlock); return 0; } early_initcall(init_app_api); Loading
arch/arm64/Kconfig +21 −0 Original line number Diff line number Diff line Loading @@ -495,9 +495,20 @@ config ARM64_ICACHE_DISABLE If you are not sure what to do, select 'N' here. config MSM_APP_API bool "API support to enable / disable app settings for MSM8996" depends on ARCH_MSM8996 && (ENABLE_FP_SIMD_SETTINGS || MSM_APP_SETTINGS) help Add API support to enable / disable the app settings to be used at runtime. These APIs are used to enable / disable app setting when specific aarch32 or aarch64 processes are running. If you are not sure what to do, select 'N' here. config ENABLE_FP_SIMD_SETTINGS bool "Enable FP(Floating Point) Settings for Qualcomm MSM8996" depends on ARCH_MSM8996 select MSM_APP_API help Enable FP(Floating Point) and SIMD settings for the MSM8996 during the execution of the aarch32 processes and disable these settings Loading @@ -505,6 +516,16 @@ config ENABLE_FP_SIMD_SETTINGS If you are not sure what to do, select 'N' here. config MSM_APP_SETTINGS bool "Support to enable / disable app settings for MSM8996" depends on ARCH_MSM8996 select MSM_APP_API help Expose an interface used by the userspace at runtime to enable / disable the app specific settings. If you are not sure what to do, select 'N' here. choice prompt "Virtual address space size" default ARM64_VA_BITS_39 if ARM64_4K_PAGES Loading
arch/arm64/include/asm/app_api.h 0 → 100644 +42 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only 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. */ #ifndef __ASM_APP_API_H #define __ASM_APP_API_H #include <linux/types.h> #define APP_SETTING_BIT 30 #define MAX_ENTRIES 10 /* * APIs to set / clear the app setting bits * in the register. */ #ifdef CONFIG_MSM_APP_API extern void set_app_setting_bit(uint32_t bit); extern void clear_app_setting_bit(uint32_t bit); #else static inline void set_app_setting_bit(uint32_t bit) {} static inline void clear_app_setting_bit(uint32_t bit) {} #endif #ifdef CONFIG_MSM_APP_SETTINGS extern void get_lib_names(char *names[], unsigned int *cnt); #else static inline void get_lib_names(char *names[], unsigned int *cnt) { *cnt = 0; } #endif #endif
arch/arm64/include/asm/fpsimd.h +0 −4 Original line number Diff line number Diff line Loading @@ -84,13 +84,9 @@ extern void fpsimd_load_partial_state(struct fpsimd_partial_state *state); #ifdef CONFIG_ENABLE_FP_SIMD_SETTINGS extern void fpsimd_disable_trap(void); extern void fpsimd_enable_trap(void); extern void fpsimd_settings_disable(void); extern void fpsimd_settings_enable(void); #else static inline void fpsimd_disable_trap(void) {} static inline void fpsimd_enable_trap(void) {} static inline void fpsimd_settings_disable(void) {} static inline void fpsimd_settings_enable(void) {} #endif #endif Loading
arch/arm64/kernel/Makefile +2 −0 Original line number Diff line number Diff line Loading @@ -38,6 +38,8 @@ arm64-obj-$(CONFIG_KGDB) += kgdb.o arm64-obj-$(CONFIG_EFI) += efi.o efi-stub.o efi-entry.o arm64-obj-$(CONFIG_PCI) += pci.o arm64-obj-$(CONFIG_ARMV8_DEPRECATED) += armv8_deprecated.o arm64-obj-$(CONFIG_MSM_APP_API) += app_api.o arm64-obj-$(CONFIG_MSM_APP_SETTINGS) += app_setting.o obj-y += $(arm64-obj-y) vdso/ obj-m += $(arm64-obj-m) Loading
arch/arm64/kernel/app_api.c 0 → 100644 +75 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only 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. */ #include <linux/bitops.h> #include <linux/spinlock.h> #include <linux/cpu.h> #include <linux/export.h> #include <asm/app_api.h> static spinlock_t spinlock; static DEFINE_PER_CPU(int, app_config_applied); static unsigned long app_config_set[NR_CPUS]; static unsigned long app_config_clear[NR_CPUS]; void set_app_setting_bit(uint32_t bit) { unsigned long flags; uint64_t reg; int cpu; spin_lock_irqsave(&spinlock, flags); asm volatile("mrs %0, S3_1_C15_C15_0" : "=r" (reg)); reg = reg | BIT(bit); isb(); asm volatile("msr S3_1_C15_C15_0, %0" : : "r" (reg)); isb(); if (bit == APP_SETTING_BIT) { cpu = raw_smp_processor_id(); app_config_set[cpu]++; this_cpu_write(app_config_applied, 1); } spin_unlock_irqrestore(&spinlock, flags); } EXPORT_SYMBOL(set_app_setting_bit); void clear_app_setting_bit(uint32_t bit) { unsigned long flags; uint64_t reg; int cpu; spin_lock_irqsave(&spinlock, flags); asm volatile("mrs %0, S3_1_C15_C15_0" : "=r" (reg)); reg = reg & ~BIT(bit); isb(); asm volatile("msr S3_1_C15_C15_0, %0" : : "r" (reg)); isb(); if (bit == APP_SETTING_BIT) { cpu = raw_smp_processor_id(); app_config_clear[cpu]++; this_cpu_write(app_config_applied, 0); } spin_unlock_irqrestore(&spinlock, flags); } EXPORT_SYMBOL(clear_app_setting_bit); static int __init init_app_api(void) { spin_lock_init(&spinlock); return 0; } early_initcall(init_app_api);
