[RFC,v2,4/6] target/riscv: Add check_probe_[read|write] helper functions

Commit Message

Max Chou May 31, 2024, 5:44 p.m. UTC

The helper_check_probe_[read|write] functions wrap the probe_pages
function to perform virtual address resolution for continuous vector
load/store instructions.

Signed-off-by: Max Chou <[e-mail]>
---
 target/riscv/helper.h        |  4 ++++
 target/riscv/vector_helper.c | 12 ++++++++++++
 2 files changed, 16 insertions(+)

Patch

diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index aaf68eadfb7..f4bc907e85f 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -1,6 +1,10 @@ 
 /* Exceptions */
 DEF_HELPER_2(raise_exception, noreturn, env, i32)
 
+/* Probe page */
+DEF_HELPER_FLAGS_3(check_probe_read, TCG_CALL_NO_WG, void, env, tl, tl)
+DEF_HELPER_FLAGS_3(check_probe_write, TCG_CALL_NO_WG, void, env, tl, tl)
+
 /* Floating Point - rounding mode */
 DEF_HELPER_FLAGS_2(set_rounding_mode, TCG_CALL_NO_WG, void, env, i32)
 DEF_HELPER_FLAGS_2(set_rounding_mode_chkfrm, TCG_CALL_NO_WG, void, env, i32)
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index cb7267c3217..9263ab26b19 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -136,6 +136,18 @@  static void probe_pages(CPURISCVState *env, target_ulong addr,
     }
 }
 
+void HELPER(check_probe_read)(CPURISCVState *env, target_ulong addr,
+                              target_ulong len)
+{
+    probe_pages(env, addr, len, GETPC(), MMU_DATA_LOAD);
+}
+
+void HELPER(check_probe_write)(CPURISCVState *env, target_ulong addr,
+                               target_ulong len)
+{
+    probe_pages(env, addr, len, GETPC(), MMU_DATA_STORE);
+}
+
 static inline void vext_set_elem_mask(void *v0, int index,
                                       uint8_t value)
 {