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[v4,1/4] hw/intc: Add .impl.[min|max]_access_size declaration in RISC-V ACLINT

Message ID 20220420080901.14655-2-frank.chang@sifive.com (mailing list archive)
State New, archived
Headers show
Series Support ACLINT 32/64-bit mtimecmp/mtime read/write accesses | expand

Commit Message

Frank Chang April 20, 2022, 8:08 a.m. UTC 
From: Frank Chang <frank.chang@sifive.com>

If device's MemoryRegion doesn't have .impl.[min|max]_access_size
declaration, the default access_size_min would be 1 byte and
access_size_max would be 4 bytes (see: softmmu/memory.c).
This will cause a 64-bit memory access to ACLINT to be splitted into
two 32-bit memory accesses.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Jim Shu <jim.shu@sifive.com>
---
 hw/intc/riscv_aclint.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/hw/intc/riscv_aclint.c b/hw/intc/riscv_aclint.c
index e43b050e92..37e9ace801 100644
--- a/hw/intc/riscv_aclint.c
+++ b/hw/intc/riscv_aclint.c
@@ -208,6 +208,10 @@  static const MemoryRegionOps riscv_aclint_mtimer_ops = {
     .valid = {
         .min_access_size = 4,
         .max_access_size = 8
+    },
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 8,
     }
 };