From: Richard Henderson <richard.henderson@linaro.org>
Date: Mon, 3 Jan 2022 01:42:07 +0000 (-0800)
Subject: tcg/arm: Drop support for armv4 and armv5 hosts
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=01dfc0ed7f2c5f8dbab65f31228a2888c7b85a07;p=qemu.git

tcg/arm: Drop support for armv4 and armv5 hosts

Support for unaligned accesses is difficult for pre-v6 hosts.
While debian still builds for armv4, we cannot use a compile
time test, so test the architecture at runtime and error out.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

diff --git a/tcg/arm/tcg-target.c.inc b/tcg/arm/tcg-target.c.inc
index 5345c4e39c..29d63e98a8 100644
--- a/tcg/arm/tcg-target.c.inc
+++ b/tcg/arm/tcg-target.c.inc
@@ -2474,6 +2474,11 @@ static void tcg_target_init(TCGContext *s)
         if (pl != NULL && pl[0] == 'v' && pl[1] >= '4' && pl[1] <= '9') {
             arm_arch = pl[1] - '0';
         }
+
+        if (arm_arch < 6) {
+            error_report("TCG: ARMv%d is unsupported; exiting", arm_arch);
+            exit(EXIT_FAILURE);
+        }
     }
 
     tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS;