From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45421) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fV5hf-0001FD-6U for qemu-devel@nongnu.org; Mon, 18 Jun 2018 21:45:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fV5hc-00089K-31 for qemu-devel@nongnu.org; Mon, 18 Jun 2018 21:45:03 -0400 Sender: fluxion From: Michael Roth Date: Mon, 18 Jun 2018 20:41:52 -0500 Message-Id: <20180619014319.28272-27-mdroth@linux.vnet.ibm.com> In-Reply-To: <20180619014319.28272-1-mdroth@linux.vnet.ibm.com> References: <20180619014319.28272-1-mdroth@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 026/113] sparc: fix leon3 casa instruction when MMU is disabled List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, KONRAD Frederic , Mark Cave-Ayland From: KONRAD Frederic Since the commit af7a06bac7d3abb2da48ef3277d2a415772d2ae8: `casa [..](10), .., ..` (and probably others alternate space instructions) triggers a data access exception when the MMU is disabled. When we enter get_asi(...) dc->mem_idx is set to MMU_PHYS_IDX when the MMU is disabled. Just keep mem_idx unchanged in this case so we passthrough the MMU when it is disabled. Signed-off-by: KONRAD Frederic Signed-off-by: Mark Cave-Ayland (cherry picked from commit 6e10f37c86068e35151f982c976a85f1bec07ef2) Signed-off-by: Michael Roth --- target/sparc/translate.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/target/sparc/translate.c b/target/sparc/translate.c index 849a02aebd..63693f72e3 100644 --- a/target/sparc/translate.c +++ b/target/sparc/translate.c @@ -2093,6 +2093,11 @@ static DisasASI get_asi(DisasContext *dc, int insn, TCGMemOp memop) type = GET_ASI_BFILL; break; } + + /* MMU_PHYS_IDX is used when the MMU is disabled to passthrough the + * permissions check in get_physical_address(..). + */ + mem_idx = (dc->mem_idx == MMU_PHYS_IDX) ? MMU_PHYS_IDX : mem_idx; } else { gen_exception(dc, TT_PRIV_INSN); type = GET_ASI_EXCP; -- 2.11.0