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tcg/loongarch64: Check the host supports unaligned accesses

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This should be true of all loongarch64 running Linux.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-04-18 18:34:31 +02:00
parent a0d99b3f47
commit 81f004b223
1 changed files with 9 additions and 0 deletions
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9
tcg/loongarch64/tcg-target.c.inc
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@ -30,6 +30,7 @@
*/ */
#include "../tcg-ldst.c.inc" #include "../tcg-ldst.c.inc"
#include <asm/hwcap.h>
#ifdef CONFIG_DEBUG_TCG #ifdef CONFIG_DEBUG_TCG
static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { 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) 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_I32] = ALL_GENERAL_REGS;
tcg_target_available_regs[TCG_TYPE_I64] = ALL_GENERAL_REGS; tcg_target_available_regs[TCG_TYPE_I64] = ALL_GENERAL_REGS;