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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-46e78c5d290sm167037135e9.0.2025.10.07.07.12.28 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Oct 2025 07:12:28 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 59/62] target/arm: Implement SPAD, NSPAD, RLPAD Date: Tue, 7 Oct 2025 15:11:19 +0100 Message-ID: <20251007141123.3239867-60-peter.maydell@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251007141123.3239867-1-peter.maydell@linaro.org> References: <20251007141123.3239867-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::333; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x333.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: Richard Henderson These bits disable all access to a particular address space. Signed-off-by: Richard Henderson Reviewed-by: Pierrick Bouvier Message-id: 20250926001134.295547-8-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/ptw.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/target/arm/ptw.c b/target/arm/ptw.c index 56a3cd8fa0f..36917be83e3 100644 --- a/target/arm/ptw.c +++ b/target/arm/ptw.c @@ -387,7 +387,25 @@ static bool granule_protection_check(CPUARMState *env, uint64_t paddress, l0gptsz = 30 + FIELD_EX64(gpccr, GPCCR, L0GPTSZ); /* - * GPC Priority 2: Secure, Realm or Root address exceeds PPS. + * GPC Priority 2: Access to Secure, NonSecure or Realm is prevented + * by one of the GPCCR_EL3 address space disable bits (R_TCWMD). + * All of these bits are checked vs aa64_rme_gpc2 in gpccr_write. + */ + { + static const uint8_t disable_masks[4] = { + [ARMSS_Secure] = R_GPCCR_SPAD_MASK, + [ARMSS_NonSecure] = R_GPCCR_NSPAD_MASK, + [ARMSS_Root] = 0, + [ARMSS_Realm] = R_GPCCR_RLPAD_MASK, + }; + + if (gpccr & disable_masks[pspace]) { + goto fault_fail; + } + } + + /* + * GPC Priority 3: Secure, Realm or Root address exceeds PPS. * R_CPDSB: A NonSecure physical address input exceeding PPS * does not experience any fault. */ @@ -398,7 +416,7 @@ static bool granule_protection_check(CPUARMState *env, uint64_t paddress, goto fault_size; } - /* GPC Priority 3: the base address of GPTBR_EL3 exceeds PPS. */ + /* GPC Priority 4: the base address of GPTBR_EL3 exceeds PPS. */ tableaddr = env->cp15.gptbr_el3 << 12; if (tableaddr & ~pps_mask) { goto fault_size; @@ -502,6 +520,7 @@ static bool granule_protection_check(CPUARMState *env, uint64_t paddress, goto fault_walk; /* reserved */ } + fault_fail: fi->gpcf = GPCF_Fail; goto fault_common; fault_eabt: -- 2.43.0