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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id l10-20020adff48a000000b002366ded5864sm14353585wro.116.2022.11.22.08.39.57 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Nov 2022 08:39:57 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 2/2] target/arm: Use signed quantity to represent VMSAv8-64 translation level Date: Tue, 22 Nov 2022 16:39:54 +0000 Message-Id: <20221122163954.1900093-3-peter.maydell@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221122163954.1900093-1-peter.maydell@linaro.org> References: <20221122163954.1900093-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::433; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x433.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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Ard Biesheuvel The LPA2 extension implements 52-bit virtual addressing for 4k and 16k translation granules, and for the former, this means an additional level of translation is needed. This means we start counting at -1 instead of 0 when doing a walk, and so 'level' is now a signed quantity, and should be typed as such. So turn it from uint32_t into int32_t. This avoids a level of -1 getting misinterpreted as being >= 3, and terminating a page table walk prematurely with a bogus output address. Cc: Peter Maydell Cc: Philippe Mathieu-Daudé Cc: Richard Henderson Signed-off-by: Ard Biesheuvel Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- target/arm/ptw.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/arm/ptw.c b/target/arm/ptw.c index 8ca468d65bc..f812734bfb2 100644 --- a/target/arm/ptw.c +++ b/target/arm/ptw.c @@ -1172,7 +1172,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, S1Translate *ptw, ARMCPU *cpu = env_archcpu(env); ARMMMUIdx mmu_idx = ptw->in_mmu_idx; bool is_secure = ptw->in_secure; - uint32_t level; + int32_t level; ARMVAParameters param; uint64_t ttbr; hwaddr descaddr, indexmask, indexmask_grainsize; @@ -1302,7 +1302,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, S1Translate *ptw, */ uint32_t sl0 = extract32(tcr, 6, 2); uint32_t sl2 = extract64(tcr, 33, 1); - uint32_t startlevel; + int32_t startlevel; bool ok; /* SL2 is RES0 unless DS=1 & 4kb granule. */ -- 2.25.1