}
/**
- * copy_xstate_to_uabi_buf - Copy kernel saved xstate to a UABI buffer
+ * __copy_xstate_to_uabi_buf - Copy kernel saved xstate to a UABI buffer
* @to: membuf descriptor
- * @tsk: The task from which to copy the saved xstate
+ * @xsave: The xsave from which to copy
+ * @pkru_val: The PKRU value to store in the PKRU component
* @copy_mode: The requested copy mode
*
* Converts from kernel XSAVE or XSAVES compacted format to UABI conforming
*
* It supports partial copy but @to.pos always starts from zero.
*/
-void copy_xstate_to_uabi_buf(struct membuf to, struct task_struct *tsk,
- enum xstate_copy_mode copy_mode)
+void __copy_xstate_to_uabi_buf(struct membuf to, struct xregs_state *xsave,
+ u32 pkru_val, enum xstate_copy_mode copy_mode)
{
const unsigned int off_mxcsr = offsetof(struct fxregs_state, mxcsr);
- struct xregs_state *xsave = &tsk->thread.fpu.state.xsave;
struct xregs_state *xinit = &init_fpstate.xsave;
struct xstate_header header;
unsigned int zerofrom;
struct pkru_state pkru = {0};
/*
* PKRU is not necessarily up to date in the
- * thread's XSAVE buffer. Fill this part from the
- * per-thread storage.
+ * XSAVE buffer. Use the provided value.
*/
- pkru.pkru = tsk->thread.pkru;
+ pkru.pkru = pkru_val;
membuf_write(&to, &pkru, sizeof(pkru));
} else {
copy_feature(header.xfeatures & BIT_ULL(i), &to,
membuf_zero(&to, to.left);
}
+/**
+ * copy_xstate_to_uabi_buf - Copy kernel saved xstate to a UABI buffer
+ * @to: membuf descriptor
+ * @tsk: The task from which to copy the saved xstate
+ * @copy_mode: The requested copy mode
+ *
+ * Converts from kernel XSAVE or XSAVES compacted format to UABI conforming
+ * format, i.e. from the kernel internal hardware dependent storage format
+ * to the requested @mode. UABI XSTATE is always uncompacted!
+ *
+ * It supports partial copy but @to.pos always starts from zero.
+ */
+void copy_xstate_to_uabi_buf(struct membuf to, struct task_struct *tsk,
+ enum xstate_copy_mode copy_mode)
+{
+ __copy_xstate_to_uabi_buf(to, &tsk->thread.fpu.state.xsave,
+ tsk->thread.pkru, copy_mode);
+}
+
static int copy_from_buffer(void *dst, unsigned int offset, unsigned int size,
const void *kbuf, const void __user *ubuf)
{