9989f41fd3
- add arm64 dependent codes with GICv3 and SVE support - fix bugs based on architecture separation requests
100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/* fpsimd.h COPYRIGHT FUJITSU LIMITED 2016-2017 */
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#ifndef __HEADER_ARM64_COMMON_FPSIMD_H
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#define __HEADER_ARM64_COMMON_FPSIMD_H
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#include <ptrace.h>
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#ifndef __ASSEMBLY__
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/*
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* FP/SIMD storage area has:
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* - FPSR and FPCR
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* - 32 128-bit data registers
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*
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* Note that user_fpsimd forms a prefix of this structure, which is
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* relied upon in the ptrace FP/SIMD accessors.
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*/
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/* @ref.impl arch/arm64/include/asm/fpsimd.h::struct fpsimd_state */
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struct fpsimd_state {
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union {
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struct user_fpsimd_state user_fpsimd;
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struct {
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__uint128_t vregs[32];
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unsigned int fpsr;
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unsigned int fpcr;
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/*
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* For ptrace compatibility, pad to next 128-bit
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* boundary here if extending this struct.
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*/
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};
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};
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/* the id of the last cpu to have restored this state */
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unsigned int cpu;
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};
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/* need for struct process */
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typedef struct fpsimd_state fp_regs_struct;
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extern void thread_fpsimd_to_sve(struct thread *thread, fp_regs_struct *fp_regs);
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extern void thread_sve_to_fpsimd(struct thread *thread, fp_regs_struct *fp_regs);
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#ifdef CONFIG_ARM64_SVE
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extern size_t sve_state_size(struct thread const *thread);
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extern void sve_free(struct thread *thread);
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extern void sve_alloc(struct thread *thread);
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extern void sve_save_state(void *state, unsigned int *pfpsr);
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extern void sve_load_state(void const *state, unsigned int const *pfpsr, unsigned long vq_minus_1);
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extern unsigned int sve_get_vl(void);
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extern int sve_set_thread_vl(struct thread *thread, const unsigned long vector_length, const unsigned long flags);
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extern int sve_get_thread_vl(const struct thread *thread);
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extern int sve_set_vector_length(struct thread *thread, unsigned long vl, unsigned long flags);
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#define SVE_SET_VL(thread, vector_length, flags) sve_set_thread_vl(thread, vector_length, flags)
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#define SVE_GET_VL(thread) sve_get_thread_vl(thread)
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#else /* CONFIG_ARM64_SVE */
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#include <ihk/debug.h>
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#include <errno.h>
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static void sve_save_state(void *state, unsigned int *pfpsr)
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{
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panic("PANIC:sve_save_state() was called CONFIG_ARM64_SVE off.\n");
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}
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static void sve_load_state(void const *state, unsigned int const *pfpsr, unsigned long vq_minus_1)
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{
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panic("PANIC:sve_load_state() was called CONFIG_ARM64_SVE off.\n");
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}
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static unsigned int sve_get_vl(void)
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{
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panic("PANIC:sve_get_vl() was called CONFIG_ARM64_SVE off.\n");
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return (unsigned int)-1;
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}
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static int sve_set_vector_length(struct thread *thread, unsigned long vl, unsigned long flags)
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{
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return -EINVAL;
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}
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/* for prctl syscall */
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#define SVE_SET_VL(a,b,c) (-EINVAL)
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#define SVE_GET_VL(a) (-EINVAL)
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#endif /* CONFIG_ARM64_SVE */
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extern void init_sve_vl(void);
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extern void fpsimd_save_state(struct fpsimd_state *state);
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extern void fpsimd_load_state(struct fpsimd_state *state);
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extern void thread_fpsimd_save(struct thread *thread);
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extern void thread_fpsimd_load(struct thread *thread);
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extern int sve_max_vl;
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extern int sve_default_vl;
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#endif /* !__ASSEMBLY__ */
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#endif /* !__HEADER_ARM64_COMMON_FPSIMD_H */
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