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[PW_SID:1076174] [v2] riscv: vector: treat VS_INITIAL as discard #1704

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[PW_SID:1076174] [v2] riscv: vector: treat VS_INITIAL as discard #1704

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10 changes: 6 additions & 4 deletions arch/riscv/include/asm/vector.h
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Original file line number Diff line number Diff line change
Expand Up @@ -298,8 +298,8 @@ static inline void __riscv_v_vstate_discard(void)
static inline void riscv_v_vstate_discard(struct pt_regs *regs)
{
if (riscv_v_vstate_query(regs)) {
__riscv_v_vstate_discard();
__riscv_v_vstate_dirty(regs);
set_tsk_thread_flag(current, TIF_RISCV_V_DEFER_RESTORE);
riscv_v_vstate_on(regs);
}
}

Expand All @@ -315,7 +315,9 @@ static inline void riscv_v_vstate_save(struct __riscv_v_ext_state *vstate,
static inline void riscv_v_vstate_restore(struct __riscv_v_ext_state *vstate,
struct pt_regs *regs)
{
if (riscv_v_vstate_query(regs)) {
if (__riscv_v_vstate_check(regs->status, INITIAL)) {
__riscv_v_vstate_discard();
} else if (riscv_v_vstate_query(regs)) {
__riscv_v_vstate_restore(vstate, vstate->datap);
__riscv_v_vstate_clean(regs);
}
Expand All @@ -326,7 +328,7 @@ static inline void riscv_v_vstate_set_restore(struct task_struct *task,
{
if (riscv_v_vstate_query(regs)) {
set_tsk_thread_flag(task, TIF_RISCV_V_DEFER_RESTORE);
riscv_v_vstate_on(regs);
__riscv_v_vstate_clean(regs);
}
}

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