@@ -15,6 +15,19 @@
* x0 - dest
*/
SYM_FUNC_START(__pi_clear_page)
+#ifdef CONFIG_AS_HAS_MOPS
+ .arch_extension mops
+alternative_if_not ARM64_HAS_MOPS
+ b .Lno_mops
+alternative_else_nop_endif
+
+ mov x1, #PAGE_SIZE
+ setpn [x0]!, x1!, xzr
+ setmn [x0]!, x1!, xzr
+ seten [x0]!, x1!, xzr
+ ret
+.Lno_mops:
+#endif
mrs x1, dczid_el0
tbnz x1, #4, 2f /* Branch if DC ZVA is prohibited */
and w1, w1, #0xf
@@ -18,6 +18,19 @@
* x1 - src
*/
SYM_FUNC_START(__pi_copy_page)
+#ifdef CONFIG_AS_HAS_MOPS
+ .arch_extension mops
+alternative_if_not ARM64_HAS_MOPS
+ b .Lno_mops
+alternative_else_nop_endif
+
+ mov x2, #PAGE_SIZE
+ cpypwn [x0]!, [x1]!, x2!
+ cpymwn [x0]!, [x1]!, x2!
+ cpyewn [x0]!, [x1]!, x2!
+ ret
+.Lno_mops:
+#endif
ldp x2, x3, [x1]
ldp x4, x5, [x1, #16]
ldp x6, x7, [x1, #32]
Similarly to what was done to the memcpy() routines, make copy_page() and clear_page() also use the Armv8.8 FEAT_MOPS instructions. Note: For copy_page() this uses the CPY* instructions instead of CPYF* as CPYF* doesn't allow src and dst to be equal. It's not clear if copy_page() needs to allow equal src and dst but it has worked so far with the current implementation and there is no documentation forbidding it. Note, the unoptimized version of copy_page() in assembler.h is left as it is. Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> --- arch/arm64/lib/clear_page.S | 13 +++++++++++++ arch/arm64/lib/copy_page.S | 13 +++++++++++++ 2 files changed, 26 insertions(+)