target/arm: Implement the SETG* instructions

The FEAT_MOPS SETG* instructions are very similar to the SET*
instructions, but as well as setting memory contents they also
set the MTE tags. They are architecturally required to operate
on tag-granule aligned regions only.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230912140434.1333369-10-peter.maydell@linaro.org

1 files changed, 10 insertions, 0 deletions

diff --git a/target/arm/internals.h b/target/arm/internals.h
index a70a7fd50f..642f77df29 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1300,6 +1300,16 @@ uint64_t mte_mops_probe(CPUARMState *env, uint64_t ptr, uint64_t size,
 void mte_check_fail(CPUARMState *env, uint32_t desc,
                     uint64_t dirty_ptr, uintptr_t ra);
 
+/**
+ * mte_mops_set_tags: Set MTE tags for a portion of a FEAT_MOPS operation
+ * @env: CPU env
+ * @dirty_ptr: Start address of memory region (dirty pointer)
+ * @size: length of region (guaranteed not to cross page boundary)
+ * @desc: MTEDESC descriptor word
+ */
+void mte_mops_set_tags(CPUARMState *env, uint64_t dirty_ptr, uint64_t size,
+                       uint32_t desc);
+
 static inline int allocation_tag_from_addr(uint64_t ptr)
 {
     return extract64(ptr, 56, 4);