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[173.198.77.218]) by smtp.gmail.com with ESMTPSA id x21-20020a056a00189500b0058bc37f3d13sm174104pfh.43.2023.01.23.16.01.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Jan 2023 16:01:21 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, yier.jin@huawei.com, jonathan.cameron@huawei.com, leonardo.garcia@linaro.org Subject: [PATCH 20/22] target/arm: Implement the granule protection check Date: Mon, 23 Jan 2023 14:00:25 -1000 Message-Id: <20230124000027.3565716-21-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230124000027.3565716-1-richard.henderson@linaro.org> References: <20230124000027.3565716-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::52e; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x52e.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 Place the check at the end of get_phys_addr_with_struct, so that we check all physical results. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/ptw.c | 253 +++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 234 insertions(+), 19 deletions(-) diff --git a/target/arm/ptw.c b/target/arm/ptw.c index 3205339957..8249d93326 100644 --- a/target/arm/ptw.c +++ b/target/arm/ptw.c @@ -32,11 +32,18 @@ typedef struct S1Translate { void *out_host; } S1Translate; -static bool get_phys_addr_with_struct(CPUARMState *env, S1Translate *ptw, - target_ulong address, - MMUAccessType access_type, - GetPhysAddrResult *result, - ARMMMUFaultInfo *fi) +static bool get_phys_addr_inner(CPUARMState *env, S1Translate *ptw, + target_ulong address, + MMUAccessType access_type, + GetPhysAddrResult *result, + ARMMMUFaultInfo *fi) + __attribute__((nonnull)); + +static bool get_phys_addr_outer(CPUARMState *env, S1Translate *ptw, + target_ulong address, + MMUAccessType access_type, + GetPhysAddrResult *result, + ARMMMUFaultInfo *fi) __attribute__((nonnull)); /* This mapping is common between ID_AA64MMFR0.PARANGE and TCR_ELx.{I}PS. */ @@ -193,6 +200,197 @@ static bool regime_translation_disabled(CPUARMState *env, ARMMMUIdx mmu_idx, return (regime_sctlr(env, mmu_idx) & SCTLR_M) == 0; } +static bool granule_protection_check(CPUARMState *env, uint64_t paddress, + ARMSecuritySpace pspace, + ARMMMUFaultInfo *fi) +{ + MemTxAttrs attrs = { + .secure = true, + .space = ARMSS_Root, + }; + ARMCPU *cpu = env_archcpu(env); + uint64_t gpccr = env->cp15.gpccr_el3; + unsigned pps, pgs, l0gptsz, level = 0; + uint64_t tableaddr, pps_mask, align, entry, index; + AddressSpace *as; + MemTxResult result; + int gpi; + + if (!FIELD_EX64(gpccr, GPCCR, GPC)) { + return true; + } + + /* + * GPC Priority 1 (R_GMGRR): + * R_JWCSM: If the configuration of GPCCR_EL3 is invalid, + * the access fails as GPT walk fault at level 0. + */ + + /* + * Configuration of PPS to a value exceeding the implemented + * physical address size is invalid. + */ + pps = FIELD_EX64(gpccr, GPCCR, PPS); + if (pps > FIELD_EX64(cpu->isar.id_aa64mmfr0, ID_AA64MMFR0, PARANGE)) { + goto fault_walk; + } + pps = pamax_map[pps]; + pps_mask = MAKE_64BIT_MASK(0, pps); + + switch (FIELD_EX64(gpccr, GPCCR, SH)) { + case 0b10: /* outer sharable */ + break; + case 0b00: /* non-sharable */ + case 0b11: /* inner sharable */ + /* Inner and Outer non-cacheable requires Outer sharable. */ + if (FIELD_EX64(gpccr, GPCCR, ORGN) == 0 && + FIELD_EX64(gpccr, GPCCR, IRGN) == 0) { + goto fault_walk; + } + break; + default: /* reserved */ + goto fault_walk; + } + + switch (FIELD_EX64(gpccr, GPCCR, PGS)) { + case 0b00: /* 4KB */ + pgs = 12; + break; + case 0b01: /* 64KB */ + pgs = 16; + break; + case 0b10: /* 16KB */ + pgs = 14; + break; + default: /* reserved */ + goto fault_walk; + } + + /* Note this field is read-only and fixed at reset. */ + l0gptsz = 30 + FIELD_EX64(gpccr, GPCCR, L0GPTSZ); + + /* + * GPC Priority 2: Secure, Realm or Root address exceeds PPS. + * R_CPDSB: A NonSecure physical address input exceeding PPS + * does not experience any fault. + */ + if (paddress & ~pps_mask) { + if (pspace == ARMSS_NonSecure) { + return true; + } + goto fault_size; + } + + /* GPC Priority 3: the base address of GPTBR_EL3 exceeds PPS. */ + tableaddr = env->cp15.gptbr_el3 << 12; + if (tableaddr & ~pps_mask) { + goto fault_size; + } + + /* + * BADDR is aligned per a function of PPS and L0GPTSZ. + * These bits of GPTBR_EL3 are RES0, but are not a configuration error, + * unlike the RES0 bits of the GPT entries (R_XNKFZ). + */ + align = MAX(pps - l0gptsz + 3, 12); + align = MAKE_64BIT_MASK(0, align); + tableaddr &= ~align; + + as = arm_addressspace(env_cpu(env), attrs); + + /* Level 0 lookup. */ + index = extract64(paddress, l0gptsz, pps - l0gptsz); + tableaddr += index * 8; + entry = address_space_ldq_le(as, tableaddr, attrs, &result); + if (result != MEMTX_OK) { + goto fault_eabt; + } + + switch (extract32(entry, 0, 4)) { + case 1: /* block descriptor */ + if (entry >> 8) { + goto fault_walk; /* RES0 bits not 0 */ + } + gpi = extract32(entry, 4, 4); + goto found; + case 3: /* table descriptor */ + tableaddr = entry & ~0xf; + align = MAX(l0gptsz - pgs - 1, 12); + align = MAKE_64BIT_MASK(0, align); + if (tableaddr & (~pps_mask | align)) { + goto fault_walk; /* RES0 bits not 0 */ + } + break; + default: /* invalid */ + goto fault_walk; + } + + /* Level 1 lookup */ + level = 1; + index = extract64(paddress, pgs + 4, l0gptsz - pgs - 4); + tableaddr += index * 8; + entry = address_space_ldq_le(as, tableaddr, attrs, &result); + if (result != MEMTX_OK) { + goto fault_eabt; + } + + switch (extract32(entry, 0, 4)) { + case 1: /* contiguous descriptor */ + if (entry >> 10) { + goto fault_walk; /* RES0 bits not 0 */ + } + /* + * Because the softmmu tlb only works on units of TARGET_PAGE_SIZE, + * and because we cannot invalidate by pa, and thus will always + * flush entire tlbs, we don't actually care about the range here + * and can simply extract the GPI as the result. + */ + if (extract32(entry, 8, 2) == 0) { + goto fault_walk; /* reserved contig */ + } + gpi = extract32(entry, 4, 4); + break; + default: + index = extract64(paddress, pgs, 4); + gpi = extract64(entry, index * 4, 4); + break; + } + + found: + switch (gpi) { + case 0b0000: /* no access */ + break; + case 0b1111: /* all access */ + return true; + case 0b1000: + case 0b1001: + case 0b1010: + case 0b1011: + if (pspace == (gpi & 3)) { + return true; + } + break; + default: + goto fault_walk; /* reserved */ + } + + fi->gpcf = GPCF_Fail; + goto fault_common; + fault_eabt: + fi->gpcf = GPCF_EABT; + goto fault_common; + fault_size: + fi->gpcf = GPCF_AddressSize; + goto fault_common; + fault_walk: + fi->gpcf = GPCF_Walk; + fault_common: + fi->level = level; + fi->paddr = paddress; + fi->paddr_space = pspace; + return false; +} + static bool S2_attrs_are_device(uint64_t hcr, uint8_t attrs) { /* @@ -238,8 +436,7 @@ static bool S1_ptw_translate(CPUARMState *env, S1Translate *ptw, }; GetPhysAddrResult s2 = { }; - if (get_phys_addr_with_struct(env, &s2ptw, addr, - MMU_DATA_LOAD, &s2, fi)) { + if (get_phys_addr_outer(env, &s2ptw, addr, MMU_DATA_LOAD, &s2, fi)) { goto fail; } ptw->out_phys = s2.f.phys_addr; @@ -300,6 +497,9 @@ static bool S1_ptw_translate(CPUARMState *env, S1Translate *ptw, fail: assert(fi->type != ARMFault_None); + if (fi->type == ARMFault_GPCFOnOutput) { + fi->type = ARMFault_GPCFOnWalk; + } fi->s2addr = addr; fi->stage2 = true; fi->s1ptw = true; @@ -2811,7 +3011,7 @@ static bool get_phys_addr_twostage(CPUARMState *env, S1Translate *ptw, ARMSecuritySpace ipa_space, s2walk_space; uint64_t hcr; - ret = get_phys_addr_with_struct(env, ptw, address, access_type, result, fi); + ret = get_phys_addr_inner(env, ptw, address, access_type, result, fi); /* If S1 fails, return early. */ if (ret) { @@ -2848,7 +3048,7 @@ static bool get_phys_addr_twostage(CPUARMState *env, S1Translate *ptw, cacheattrs1 = result->cacheattrs; memset(result, 0, sizeof(*result)); - ret = get_phys_addr_with_struct(env, ptw, ipa, access_type, result, fi); + ret = get_phys_addr_inner(env, ptw, ipa, access_type, result, fi); fi->s2addr = ipa; /* Combine the S1 and S2 perms. */ @@ -2908,11 +3108,11 @@ static bool get_phys_addr_twostage(CPUARMState *env, S1Translate *ptw, return false; } -static bool get_phys_addr_with_struct(CPUARMState *env, S1Translate *ptw, - target_ulong address, - MMUAccessType access_type, - GetPhysAddrResult *result, - ARMMMUFaultInfo *fi) +static bool get_phys_addr_inner(CPUARMState *env, S1Translate *ptw, + target_ulong address, + MMUAccessType access_type, + GetPhysAddrResult *result, + ARMMMUFaultInfo *fi) { ARMMMUIdx mmu_idx = ptw->in_mmu_idx; bool is_secure = ptw->in_secure; @@ -3032,6 +3232,23 @@ static bool get_phys_addr_with_struct(CPUARMState *env, S1Translate *ptw, } } +static bool get_phys_addr_outer(CPUARMState *env, S1Translate *ptw, + target_ulong address, + MMUAccessType access_type, + GetPhysAddrResult *result, + ARMMMUFaultInfo *fi) +{ + if (get_phys_addr_inner(env, ptw, address, access_type, result, fi)) { + return true; + } + if (!granule_protection_check(env, result->f.phys_addr, + result->f.attrs.space, fi)) { + fi->type = ARMFault_GPCFOnOutput; + return true; + } + return false; +} + bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address, MMUAccessType access_type, ARMMMUIdx mmu_idx, bool is_secure, GetPhysAddrResult *result, @@ -3042,8 +3259,7 @@ bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address, .in_secure = is_secure, .in_space = arm_secure_to_space(is_secure), }; - return get_phys_addr_with_struct(env, &ptw, address, access_type, - result, fi); + return get_phys_addr_outer(env, &ptw, address, access_type, result, fi); } bool get_phys_addr(CPUARMState *env, target_ulong address, @@ -3113,8 +3329,7 @@ bool get_phys_addr(CPUARMState *env, target_ulong address, ptw.in_space = ss; ptw.in_secure = arm_space_is_secure(ss); - return get_phys_addr_with_struct(env, &ptw, address, access_type, - result, fi); + return get_phys_addr_outer(env, &ptw, address, access_type, result, fi); } hwaddr arm_cpu_get_phys_page_attrs_debug(CPUState *cs, vaddr addr, @@ -3133,7 +3348,7 @@ hwaddr arm_cpu_get_phys_page_attrs_debug(CPUState *cs, vaddr addr, ARMMMUFaultInfo fi = {}; bool ret; - ret = get_phys_addr_with_struct(env, &ptw, addr, MMU_DATA_LOAD, &res, &fi); + ret = get_phys_addr_outer(env, &ptw, addr, MMU_DATA_LOAD, &res, &fi); *attrs = res.f.attrs; if (ret) {