Hi,
在 2023/5/5 下午9:24, WANG Xuerui 写道:
Hi,
On 2023/5/3 15:06, Richard Henderson wrote:
This should be true of all server class loongarch64.
And desktop-class (i.e. all Loongson-3 series).
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
tcg/loongarch64/tcg-target.c.inc | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tcg/loongarch64/tcg-target.c.inc
b/tcg/loongarch64/tcg-target.c.inc
index e651ec5c71..ccc13ffdb4 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 +1675,11 @@ static void
tcg_target_qemu_prologue(TCGContext *s)
static void tcg_target_init(TCGContext *s)
{
+ unsigned long hwcap = qemu_getauxval(AT_HWCAP);
+
+ /* All server class loongarch have UAL; only embedded do not. */
+ assert(hwcap & HWCAP_LOONGARCH_UAL);
+
It is a bit worrying that a future SoC (the octa-core Loongson 2K3000)
might get used for light desktop use cases (e.g. laptops) where QEMU
is arguably relevant, but it's currently unclear whether its LA364
micro-architecture will have UAL. The Loongson folks may have more to
share.
'LA364' support UAL.
Thanks.
Song Gao
