target/ppc: Fix gen_priv_exception error value in mfspr/mtspr

The code in linux-user/ppc/cpu_loop.c expects POWERPC_EXCP_PRIV
exception with error POWERPC_EXCP_PRIV_OPC or POWERPC_EXCP_PRIV_REG,
while POWERPC_EXCP_INVAL_SPR is expected in POWERPC_EXCP_INVAL
exceptions. This mismatch caused an EXCP_DUMP with the message "Unknown
privilege violation (03)", as seen in [1].

[1] https://gitlab.com/qemu-project/qemu/-/issues/588

Fixes: 9b2fadda3e01 ("ppc: Rework generation of priv and inval interrupts")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/588
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20220627141104.669152-2-matheus.ferst@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 1d6daa4608c0f32cd06658636e3e52c1acbc58c4..55f34eb490f504ce9d69a77703a5bc45e4033ff2 100644 (file)
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -4789,11 +4789,11 @@ static inline void gen_op_mfspr(DisasContext *ctx)
          */
         if (sprn & 0x10) {
             if (ctx->pr) {
-                gen_priv_exception(ctx, POWERPC_EXCP_INVAL_SPR);
+                gen_priv_exception(ctx, POWERPC_EXCP_PRIV_REG);
             }
         } else {
             if (ctx->pr || sprn == 0 || sprn == 4 || sprn == 5 || sprn == 6) {
-                gen_hvpriv_exception(ctx, POWERPC_EXCP_INVAL_SPR);
+                gen_hvpriv_exception(ctx, POWERPC_EXCP_PRIV_REG);
             }
         }
     }
@@ -4976,11 +4976,11 @@ static void gen_mtspr(DisasContext *ctx)
          */
         if (sprn & 0x10) {
             if (ctx->pr) {
-                gen_priv_exception(ctx, POWERPC_EXCP_INVAL_SPR);
+                gen_priv_exception(ctx, POWERPC_EXCP_PRIV_REG);
             }
         } else {
             if (ctx->pr || sprn == 0) {
-                gen_hvpriv_exception(ctx, POWERPC_EXCP_INVAL_SPR);
+                gen_hvpriv_exception(ctx, POWERPC_EXCP_PRIV_REG);
             }
         }
     }