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Thu, 31 Aug 2023 06:13:50 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Shashi Mallela , Peter Maydell , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= Subject: [PATCH] hw/intc/arm_gicv3_its: Avoid maybe-uninitialized error in get_vte() Date: Thu, 31 Aug 2023 15:13:48 +0200 Message-ID: <20230831131348.69032-1-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::633; envelope-from=philmd@linaro.org; helo=mail-ej1-x633.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Fix when using GCC v11.4 (Ubuntu 11.4.0-1ubuntu1~22.04) with CFLAGS=-Og: [4/6] Compiling C object libcommon.fa.p/hw_intc_arm_gicv3_its.c.o FAILED: libcommon.fa.p/hw_intc_arm_gicv3_its.c.o inlined from ‘lookup_vte’ at hw/intc/arm_gicv3_its.c:453:9, inlined from ‘vmovp_callback’ at hw/intc/arm_gicv3_its.c:1039:14: hw/intc/arm_gicv3_its.c:347:9: error: ‘vte.rdbase’ may be used uninitialized [-Werror=maybe-uninitialized] 347 | trace_gicv3_its_vte_read(vpeid, vte->valid, vte->vptsize, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 348 | vte->vptaddr, vte->rdbase); | ~~~~~~~~~~~~~~~~~~~~~~~~~~ hw/intc/arm_gicv3_its.c: In function ‘vmovp_callback’: hw/intc/arm_gicv3_its.c:1036:13: note: ‘vte’ declared here 1036 | VTEntry vte; | ^~~ Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Alex Bennée --- hw/intc/arm_gicv3_its.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c index 43dfd7a35c..5f552b4d37 100644 --- a/hw/intc/arm_gicv3_its.c +++ b/hw/intc/arm_gicv3_its.c @@ -330,23 +330,20 @@ static MemTxResult get_vte(GICv3ITSState *s, uint32_t vpeid, VTEntry *vte) if (entry_addr == -1) { /* No L2 table entry, i.e. no valid VTE, or a memory error */ vte->valid = false; - goto out; + trace_gicv3_its_vte_read_fault(vpeid); + return MEMTX_OK; } vteval = address_space_ldq_le(as, entry_addr, MEMTXATTRS_UNSPECIFIED, &res); if (res != MEMTX_OK) { - goto out; + trace_gicv3_its_vte_read_fault(vpeid); + return res; } vte->valid = FIELD_EX64(vteval, VTE, VALID); vte->vptsize = FIELD_EX64(vteval, VTE, VPTSIZE); vte->vptaddr = FIELD_EX64(vteval, VTE, VPTADDR); vte->rdbase = FIELD_EX64(vteval, VTE, RDBASE); -out: - if (res != MEMTX_OK) { - trace_gicv3_its_vte_read_fault(vpeid); - } else { - trace_gicv3_its_vte_read(vpeid, vte->valid, vte->vptsize, - vte->vptaddr, vte->rdbase); - } + trace_gicv3_its_vte_read(vpeid, vte->valid, vte->vptsize, + vte->vptaddr, vte->rdbase); return res; }