void flush_mte_state(void);
void mte_thread_switch(struct task_struct *next);
void mte_suspend_exit(void);
-long set_mte_ctrl(unsigned long arg);
-long get_mte_ctrl(void);
+long set_mte_ctrl(struct task_struct *task, unsigned long arg);
+long get_mte_ctrl(struct task_struct *task);
#else
static inline void mte_suspend_exit(void)
{
}
-static inline long set_mte_ctrl(unsigned long arg)
+static inline long set_mte_ctrl(struct task_struct *task, unsigned long arg)
{
return 0;
}
-static inline long get_mte_ctrl(void)
+static inline long get_mte_ctrl(struct task_struct *task)
{
return 0;
}
#ifdef CONFIG_ARM64_TAGGED_ADDR_ABI
/* PR_{SET,GET}_TAGGED_ADDR_CTRL prctl */
-long set_tagged_addr_ctrl(unsigned long arg);
-long get_tagged_addr_ctrl(void);
-#define SET_TAGGED_ADDR_CTRL(arg) set_tagged_addr_ctrl(arg)
-#define GET_TAGGED_ADDR_CTRL() get_tagged_addr_ctrl()
+long set_tagged_addr_ctrl(struct task_struct *task, unsigned long arg);
+long get_tagged_addr_ctrl(struct task_struct *task);
+#define SET_TAGGED_ADDR_CTRL(arg) set_tagged_addr_ctrl(current, arg)
+#define GET_TAGGED_ADDR_CTRL() get_tagged_addr_ctrl(current)
#endif
/*
update_gcr_el1_excl(current->thread.gcr_user_incl);
}
-long set_mte_ctrl(unsigned long arg)
+long set_mte_ctrl(struct task_struct *task, unsigned long arg)
{
u64 tcf0;
+ u64 gcr_incl = (arg & PR_MTE_TAG_MASK) >> PR_MTE_TAG_SHIFT;
if (!system_supports_mte())
return 0;
return -EINVAL;
}
- set_sctlr_el1_tcf0(tcf0);
- set_gcr_el1_excl((arg & PR_MTE_TAG_MASK) >> PR_MTE_TAG_SHIFT);
+ if (task != current) {
+ task->thread.sctlr_tcf0 = tcf0;
+ task->thread.gcr_user_incl = gcr_incl;
+ } else {
+ set_sctlr_el1_tcf0(tcf0);
+ set_gcr_el1_excl(gcr_incl);
+ }
return 0;
}
-long get_mte_ctrl(void)
+long get_mte_ctrl(struct task_struct *task)
{
unsigned long ret;
if (!system_supports_mte())
return 0;
- ret = current->thread.gcr_user_incl << PR_MTE_TAG_SHIFT;
+ ret = task->thread.gcr_user_incl << PR_MTE_TAG_SHIFT;
- switch (current->thread.sctlr_tcf0) {
+ switch (task->thread.sctlr_tcf0) {
case SCTLR_EL1_TCF0_NONE:
return PR_MTE_TCF_NONE;
case SCTLR_EL1_TCF0_SYNC:
*/
static unsigned int tagged_addr_disabled;
-long set_tagged_addr_ctrl(unsigned long arg)
+long set_tagged_addr_ctrl(struct task_struct *task, unsigned long arg)
{
unsigned long valid_mask = PR_TAGGED_ADDR_ENABLE;
+ struct thread_info *ti = task_thread_info(task);
- if (is_compat_task())
+ if (is_compat_thread(ti))
return -EINVAL;
if (system_supports_mte())
if (arg & PR_TAGGED_ADDR_ENABLE && tagged_addr_disabled)
return -EINVAL;
- if (set_mte_ctrl(arg) != 0)
+ if (set_mte_ctrl(task, arg) != 0)
return -EINVAL;
- update_thread_flag(TIF_TAGGED_ADDR, arg & PR_TAGGED_ADDR_ENABLE);
+ update_ti_thread_flag(ti, TIF_TAGGED_ADDR, arg & PR_TAGGED_ADDR_ENABLE);
return 0;
}
-long get_tagged_addr_ctrl(void)
+long get_tagged_addr_ctrl(struct task_struct *task)
{
long ret = 0;
+ struct thread_info *ti = task_thread_info(task);
- if (is_compat_task())
+ if (is_compat_thread(ti))
return -EINVAL;
- if (test_thread_flag(TIF_TAGGED_ADDR))
+ if (test_ti_thread_flag(ti, TIF_TAGGED_ADDR))
ret = PR_TAGGED_ADDR_ENABLE;
- ret |= get_mte_ctrl();
+ ret |= get_mte_ctrl(task);
return ret;
}