diff mbox series

[v5,31/54] tcg/loongarch64: Check the host supports unaligned accesses

Message ID 20230515143313.734053-32-richard.henderson@linaro.org
State Superseded
Headers show
Series tcg: Improve atomicity support | expand

Commit Message

Richard Henderson May 15, 2023, 2:32 p.m. UTC 
This should be true of all loongarch64 running Linux.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/loongarch64/tcg-target.c.inc | 9 +++++++++
 1 file changed, 9 insertions(+)

Comments

Peter Maydell May 16, 2023, 9:44 a.m. UTC | #1 
On Mon, 15 May 2023 at 15:39, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> This should be true of all loongarch64 running Linux.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  tcg/loongarch64/tcg-target.c.inc | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM
diff mbox series

Patch

diff --git a/tcg/loongarch64/tcg-target.c.inc b/tcg/loongarch64/tcg-target.c.inc
index e651ec5c71..33d8e67513 100644
--- a/tcg/loongarch64/tcg-target.c.inc
+++ b/tcg/loongarch64/tcg-target.c.inc
@@ -30,6 +30,7 @@ 
  */
 
 #include "../tcg-ldst.c.inc"
+#include <asm/hwcap.h>
 
 #ifdef CONFIG_DEBUG_TCG
 static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
@@ -1674,6 +1675,14 @@  static void tcg_target_qemu_prologue(TCGContext *s)
 
 static void tcg_target_init(TCGContext *s)
 {
+    unsigned long hwcap = qemu_getauxval(AT_HWCAP);
+
+    /* Server and desktop class cpus have UAL; embedded cpus do not. */
+    if (!(hwcap & HWCAP_LOONGARCH_UAL)) {
+        error_report("TCG: unaligned access support required; exiting");
+        exit(EXIT_FAILURE);
+    }
+
     tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS;
     tcg_target_available_regs[TCG_TYPE_I64] = ALL_GENERAL_REGS;