From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45376) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f5slV-00078S-Gx for qemu-devel@nongnu.org; Tue, 10 Apr 2018 08:52:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f5slS-0002eO-Vf for qemu-devel@nongnu.org; Tue, 10 Apr 2018 08:52:49 -0400 From: David Gibson Date: Tue, 10 Apr 2018 22:52:27 +1000 Message-Id: <20180410125233.31618-2-david@gibson.dropbear.id.au> In-Reply-To: <20180410125233.31618-1-david@gibson.dropbear.id.au> References: <20180410125233.31618-1-david@gibson.dropbear.id.au> Subject: [Qemu-devel] [PULL 1/7] target/ppc: Initialize lazy_tlb_flush correctly List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: peter.maydell@linaro.org Cc: groug@kaod.org, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, David Gibson ppc_tr_init_disas_context() correctly sets lazy_tlb_flush to true on certain CPU models. However, it leaves it uninitialized, instead of setting it to false on all others. It wasn't caught before now because we didn't have examples in the tests that exercised this path. However it can now be caught using clang's undefined behaviour sanitizer and the sam460ex board. Suggested-by: Peter Maydell Signed-off-by: David Gibson Reviewed-by: Thomas Huth Reviewed-by: Greg Kurz --- target/ppc/translate.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/target/ppc/translate.c b/target/ppc/translate.c index 218665b408..3457d29f8e 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -7237,10 +7237,9 @@ static int ppc_tr_init_disas_context(DisasContextBase *dcbase, ctx->sf_mode = msr_is_64bit(env, env->msr); ctx->has_cfar = !!(env->flags & POWERPC_FLAG_CFAR); #endif - if (env->mmu_model == POWERPC_MMU_32B || - env->mmu_model == POWERPC_MMU_601 || - (env->mmu_model & POWERPC_MMU_64B)) - ctx->lazy_tlb_flush = true; + ctx->lazy_tlb_flush = env->mmu_model == POWERPC_MMU_32B + || env->mmu_model == POWERPC_MMU_601 + || (env->mmu_model & POWERPC_MMU_64B); ctx->fpu_enabled = !!msr_fp; if ((env->flags & POWERPC_FLAG_SPE) && msr_spe) -- 2.14.3