160 lines
4.6 KiB
C
160 lines
4.6 KiB
C
/*
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __ASM_FP_H
|
|
#define __ASM_FP_H
|
|
|
|
#include <asm/errno.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/sigcontext.h>
|
|
#include <asm/sysreg.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/build_bug.h>
|
|
#include <linux/cache.h>
|
|
#include <linux/init.h>
|
|
#include <linux/stddef.h>
|
|
|
|
#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
|
|
/* Masks for extracting the FPSR and FPCR from the FPSCR */
|
|
#define VFP_FPSCR_STAT_MASK 0xf800009f
|
|
#define VFP_FPSCR_CTRL_MASK 0x07f79f00
|
|
/*
|
|
* The VFP state has 32x64-bit registers and a single 32-bit
|
|
* control/status register.
|
|
*/
|
|
#define VFP_STATE_SIZE ((32 * 8) + 4)
|
|
#endif
|
|
|
|
struct task_struct;
|
|
|
|
extern void fpsimd_save_state(struct user_fpsimd_state *state);
|
|
extern void fpsimd_load_state(struct user_fpsimd_state *state);
|
|
|
|
extern void fpsimd_save(void);
|
|
|
|
extern void fpsimd_thread_switch(struct task_struct *next);
|
|
extern void fpsimd_flush_thread(void);
|
|
|
|
extern void fpsimd_signal_preserve_current_state(void);
|
|
extern void fpsimd_preserve_current_state(void);
|
|
extern void fpsimd_restore_current_state(void);
|
|
extern void fpsimd_update_current_state(struct user_fpsimd_state const *state);
|
|
|
|
extern void fpsimd_bind_task_to_cpu(void);
|
|
extern void fpsimd_bind_state_to_cpu(struct user_fpsimd_state *state);
|
|
|
|
extern void fpsimd_flush_task_state(struct task_struct *target);
|
|
extern void fpsimd_flush_cpu_state(void);
|
|
extern void sve_flush_cpu_state(void);
|
|
|
|
/* Maximum VL that SVE VL-agnostic software can transparently support */
|
|
#define SVE_VL_ARCH_MAX 0x100
|
|
|
|
/* Offset of FFR in the SVE register dump */
|
|
static inline size_t sve_ffr_offset(int vl)
|
|
{
|
|
return SVE_SIG_FFR_OFFSET(sve_vq_from_vl(vl)) - SVE_SIG_REGS_OFFSET;
|
|
}
|
|
|
|
static inline void *sve_pffr(struct thread_struct *thread)
|
|
{
|
|
return (char *)thread->sve_state + sve_ffr_offset(thread->sve_vl);
|
|
}
|
|
|
|
extern void sve_save_state(void *state, u32 *pfpsr);
|
|
extern void sve_load_state(void const *state, u32 const *pfpsr,
|
|
unsigned long vq_minus_1);
|
|
extern unsigned int sve_get_vl(void);
|
|
|
|
struct arm64_cpu_capabilities;
|
|
extern void sve_kernel_enable(const struct arm64_cpu_capabilities *__unused);
|
|
|
|
extern u64 read_zcr_features(void);
|
|
|
|
extern int __ro_after_init sve_max_vl;
|
|
|
|
#ifdef CONFIG_ARM64_SVE
|
|
|
|
extern size_t sve_state_size(struct task_struct const *task);
|
|
|
|
extern void sve_alloc(struct task_struct *task);
|
|
extern void fpsimd_release_task(struct task_struct *task);
|
|
extern void fpsimd_sync_to_sve(struct task_struct *task);
|
|
extern void sve_sync_to_fpsimd(struct task_struct *task);
|
|
extern void sve_sync_from_fpsimd_zeropad(struct task_struct *task);
|
|
|
|
extern int sve_set_vector_length(struct task_struct *task,
|
|
unsigned long vl, unsigned long flags);
|
|
|
|
extern int sve_set_current_vl(unsigned long arg);
|
|
extern int sve_get_current_vl(void);
|
|
|
|
static inline void sve_user_disable(void)
|
|
{
|
|
sysreg_clear_set(cpacr_el1, CPACR_EL1_ZEN_EL0EN, 0);
|
|
}
|
|
|
|
static inline void sve_user_enable(void)
|
|
{
|
|
sysreg_clear_set(cpacr_el1, 0, CPACR_EL1_ZEN_EL0EN);
|
|
}
|
|
|
|
/*
|
|
* Probing and setup functions.
|
|
* Calls to these functions must be serialised with one another.
|
|
*/
|
|
extern void __init sve_init_vq_map(void);
|
|
extern void sve_update_vq_map(void);
|
|
extern int sve_verify_vq_map(void);
|
|
extern void __init sve_setup(void);
|
|
|
|
#else /* ! CONFIG_ARM64_SVE */
|
|
|
|
static inline void sve_alloc(struct task_struct *task) { }
|
|
static inline void fpsimd_release_task(struct task_struct *task) { }
|
|
static inline void sve_sync_to_fpsimd(struct task_struct *task) { }
|
|
static inline void sve_sync_from_fpsimd_zeropad(struct task_struct *task) { }
|
|
|
|
static inline int sve_set_current_vl(unsigned long arg)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int sve_get_current_vl(void)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void sve_user_disable(void) { BUILD_BUG(); }
|
|
static inline void sve_user_enable(void) { BUILD_BUG(); }
|
|
|
|
static inline void sve_init_vq_map(void) { }
|
|
static inline void sve_update_vq_map(void) { }
|
|
static inline int sve_verify_vq_map(void) { return 0; }
|
|
static inline void sve_setup(void) { }
|
|
|
|
#endif /* ! CONFIG_ARM64_SVE */
|
|
|
|
/* For use by EFI runtime services calls only */
|
|
extern void __efi_fpsimd_begin(void);
|
|
extern void __efi_fpsimd_end(void);
|
|
|
|
#endif
|
|
|
|
#endif
|