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[40.133.212.210]) by smtp.gmail.com with ESMTPSA id 13sm14678975pfi.78.2020.02.01.17.04.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Feb 2020 17:04:43 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 02/14] target/arm: Add mmu_idx for EL1 and EL2 w/ PAN enabled Date: Sat, 1 Feb 2020 17:04:27 -0800 Message-Id: <20200202010439.6410-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200202010439.6410-1-richard.henderson@linaro.org> References: <20200202010439.6410-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::442 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, alex.bennee@linaro.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" To implement PAN, we will want to swap, for short periods of time, to a different privileged mmu_idx. In addition, we cannot do this with flushing alone, because the AT* instructions have both PAN and PAN-less versions. Add the ARMMMUIdx*_PAN constants where necessary next to the corresponding ARMMMUIdx* constant. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/cpu-param.h | 2 +- target/arm/cpu.h | 33 ++++++++++++++------- target/arm/internals.h | 9 ++++++ target/arm/helper.c | 60 +++++++++++++++++++++++++++++++------- target/arm/translate-a64.c | 3 ++ target/arm/translate.c | 2 ++ 6 files changed, 87 insertions(+), 22 deletions(-) diff --git a/target/arm/cpu-param.h b/target/arm/cpu-param.h index 18ac562346..d593b60b28 100644 --- a/target/arm/cpu-param.h +++ b/target/arm/cpu-param.h @@ -29,6 +29,6 @@ # define TARGET_PAGE_BITS_MIN 10 #endif -#define NB_MMU_MODES 9 +#define NB_MMU_MODES 12 #endif diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 0b3036c484..c63bceaaa5 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -2751,20 +2751,24 @@ bool write_cpustate_to_list(ARMCPU *cpu, bool kvm_sync); * 5. we want to be able to use the TLB for accesses done as part of a * stage1 page table walk, rather than having to walk the stage2 page * table over and over. + * 6. we need separate EL1/EL2 mmu_idx for handling the Privileged Access + * Never (PAN) bit within PSTATE. * * This gives us the following list of cases: * * NS EL0 EL1&0 stage 1+2 (aka NS PL0) * NS EL1 EL1&0 stage 1+2 (aka NS PL1) + * NS EL1 EL1&0 stage 1+2 +PAN * NS EL0 EL2&0 - * NS EL2 EL2&0 + * NS EL2 EL2&0 +PAN * NS EL2 (aka NS PL2) * S EL0 EL1&0 (aka S PL0) * S EL1 EL1&0 (not used if EL3 is 32 bit) + * S EL1 EL1&0 +PAN * S EL3 (aka S PL1) * NS EL1&0 stage 2 * - * for a total of 9 different mmu_idx. + * for a total of 12 different mmu_idx. * * R profile CPUs have an MPU, but can use the same set of MMU indexes * as A profile. They only need to distinguish NS EL0 and NS EL1 (and @@ -2819,19 +2823,22 @@ typedef enum ARMMMUIdx { /* * A-profile. */ - ARMMMUIdx_E10_0 = 0 | ARM_MMU_IDX_A, - ARMMMUIdx_E20_0 = 1 | ARM_MMU_IDX_A, + ARMMMUIdx_E10_0 = 0 | ARM_MMU_IDX_A, + ARMMMUIdx_E20_0 = 1 | ARM_MMU_IDX_A, - ARMMMUIdx_E10_1 = 2 | ARM_MMU_IDX_A, + ARMMMUIdx_E10_1 = 2 | ARM_MMU_IDX_A, + ARMMMUIdx_E10_1_PAN = 3 | ARM_MMU_IDX_A, - ARMMMUIdx_E2 = 3 | ARM_MMU_IDX_A, - ARMMMUIdx_E20_2 = 4 | ARM_MMU_IDX_A, + ARMMMUIdx_E2 = 4 | ARM_MMU_IDX_A, + ARMMMUIdx_E20_2 = 5 | ARM_MMU_IDX_A, + ARMMMUIdx_E20_2_PAN = 6 | ARM_MMU_IDX_A, - ARMMMUIdx_SE10_0 = 5 | ARM_MMU_IDX_A, - ARMMMUIdx_SE10_1 = 6 | ARM_MMU_IDX_A, - ARMMMUIdx_SE3 = 7 | ARM_MMU_IDX_A, + ARMMMUIdx_SE10_0 = 7 | ARM_MMU_IDX_A, + ARMMMUIdx_SE10_1 = 8 | ARM_MMU_IDX_A, + ARMMMUIdx_SE10_1_PAN = 9 | ARM_MMU_IDX_A, + ARMMMUIdx_SE3 = 10 | ARM_MMU_IDX_A, - ARMMMUIdx_Stage2 = 8 | ARM_MMU_IDX_A, + ARMMMUIdx_Stage2 = 11 | ARM_MMU_IDX_A, /* * These are not allocated TLBs and are used only for AT system @@ -2839,6 +2846,7 @@ typedef enum ARMMMUIdx { */ ARMMMUIdx_Stage1_E0 = 0 | ARM_MMU_IDX_NOTLB, ARMMMUIdx_Stage1_E1 = 1 | ARM_MMU_IDX_NOTLB, + ARMMMUIdx_Stage1_E1_PAN = 2 | ARM_MMU_IDX_NOTLB, /* * M-profile. @@ -2864,10 +2872,13 @@ typedef enum ARMMMUIdxBit { TO_CORE_BIT(E10_0), TO_CORE_BIT(E20_0), TO_CORE_BIT(E10_1), + TO_CORE_BIT(E10_1_PAN), TO_CORE_BIT(E2), TO_CORE_BIT(E20_2), + TO_CORE_BIT(E20_2_PAN), TO_CORE_BIT(SE10_0), TO_CORE_BIT(SE10_1), + TO_CORE_BIT(SE10_1_PAN), TO_CORE_BIT(SE3), TO_CORE_BIT(Stage2), diff --git a/target/arm/internals.h b/target/arm/internals.h index 1f8ee5f573..6be8b2d1a9 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -843,12 +843,16 @@ static inline bool regime_has_2_ranges(ARMMMUIdx mmu_idx) switch (mmu_idx) { case ARMMMUIdx_Stage1_E0: case ARMMMUIdx_Stage1_E1: + case ARMMMUIdx_Stage1_E1_PAN: case ARMMMUIdx_E10_0: case ARMMMUIdx_E10_1: + case ARMMMUIdx_E10_1_PAN: case ARMMMUIdx_E20_0: case ARMMMUIdx_E20_2: + case ARMMMUIdx_E20_2_PAN: case ARMMMUIdx_SE10_0: case ARMMMUIdx_SE10_1: + case ARMMMUIdx_SE10_1_PAN: return true; default: return false; @@ -861,10 +865,13 @@ static inline bool regime_is_secure(CPUARMState *env, ARMMMUIdx mmu_idx) switch (mmu_idx) { case ARMMMUIdx_E10_0: case ARMMMUIdx_E10_1: + case ARMMMUIdx_E10_1_PAN: case ARMMMUIdx_E20_0: case ARMMMUIdx_E20_2: + case ARMMMUIdx_E20_2_PAN: case ARMMMUIdx_Stage1_E0: case ARMMMUIdx_Stage1_E1: + case ARMMMUIdx_Stage1_E1_PAN: case ARMMMUIdx_E2: case ARMMMUIdx_Stage2: case ARMMMUIdx_MPrivNegPri: @@ -875,6 +882,7 @@ static inline bool regime_is_secure(CPUARMState *env, ARMMMUIdx mmu_idx) case ARMMMUIdx_SE3: case ARMMMUIdx_SE10_0: case ARMMMUIdx_SE10_1: + case ARMMMUIdx_SE10_1_PAN: case ARMMMUIdx_MSPrivNegPri: case ARMMMUIdx_MSUserNegPri: case ARMMMUIdx_MSPriv: @@ -1046,6 +1054,7 @@ static inline bool arm_mmu_idx_is_stage1_of_2(ARMMMUIdx mmu_idx) switch (mmu_idx) { case ARMMMUIdx_Stage1_E0: case ARMMMUIdx_Stage1_E1: + case ARMMMUIdx_Stage1_E1_PAN: return true; default: return false; diff --git a/target/arm/helper.c b/target/arm/helper.c index 852fd71dcc..739d2d4cc5 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -671,6 +671,7 @@ static void tlbiall_nsnh_write(CPUARMState *env, const ARMCPRegInfo *ri, tlb_flush_by_mmuidx(cs, ARMMMUIdxBit_E10_1 | + ARMMMUIdxBit_E10_1_PAN | ARMMMUIdxBit_E10_0 | ARMMMUIdxBit_Stage2); } @@ -682,6 +683,7 @@ static void tlbiall_nsnh_is_write(CPUARMState *env, const ARMCPRegInfo *ri, tlb_flush_by_mmuidx_all_cpus_synced(cs, ARMMMUIdxBit_E10_1 | + ARMMMUIdxBit_E10_1_PAN | ARMMMUIdxBit_E10_0 | ARMMMUIdxBit_Stage2); } @@ -2700,6 +2702,7 @@ static int gt_phys_redir_timeridx(CPUARMState *env) switch (arm_mmu_idx(env)) { case ARMMMUIdx_E20_0: case ARMMMUIdx_E20_2: + case ARMMMUIdx_E20_2_PAN: return GTIMER_HYP; default: return GTIMER_PHYS; @@ -2711,6 +2714,7 @@ static int gt_virt_redir_timeridx(CPUARMState *env) switch (arm_mmu_idx(env)) { case ARMMMUIdx_E20_0: case ARMMMUIdx_E20_2: + case ARMMMUIdx_E20_2_PAN: return GTIMER_HYPVIRT; default: return GTIMER_VIRT; @@ -3337,7 +3341,9 @@ static uint64_t do_ats_write(CPUARMState *env, uint64_t value, format64 = arm_s1_regime_using_lpae_format(env, mmu_idx); if (arm_feature(env, ARM_FEATURE_EL2)) { - if (mmu_idx == ARMMMUIdx_E10_0 || mmu_idx == ARMMMUIdx_E10_1) { + if (mmu_idx == ARMMMUIdx_E10_0 || + mmu_idx == ARMMMUIdx_E10_1 || + mmu_idx == ARMMMUIdx_E10_1_PAN) { format64 |= env->cp15.hcr_el2 & (HCR_VM | HCR_DC); } else { format64 |= arm_current_el(env) == 2; @@ -3797,7 +3803,9 @@ static void vmsa_tcr_ttbr_el2_write(CPUARMState *env, const ARMCPRegInfo *ri, if (extract64(raw_read(env, ri) ^ value, 48, 16) && (arm_hcr_el2_eff(env) & HCR_E2H)) { tlb_flush_by_mmuidx(env_cpu(env), - ARMMMUIdxBit_E20_2 | ARMMMUIdxBit_E20_0); + ARMMMUIdxBit_E20_2 | + ARMMMUIdxBit_E20_2_PAN | + ARMMMUIdxBit_E20_0); } raw_write(env, ri, value); } @@ -3815,6 +3823,7 @@ static void vttbr_write(CPUARMState *env, const ARMCPRegInfo *ri, if (raw_read(env, ri) != value) { tlb_flush_by_mmuidx(cs, ARMMMUIdxBit_E10_1 | + ARMMMUIdxBit_E10_1_PAN | ARMMMUIdxBit_E10_0 | ARMMMUIdxBit_Stage2); raw_write(env, ri, value); @@ -4175,12 +4184,18 @@ static int vae1_tlbmask(CPUARMState *env) { /* Since we exclude secure first, we may read HCR_EL2 directly. */ if (arm_is_secure_below_el3(env)) { - return ARMMMUIdxBit_SE10_1 | ARMMMUIdxBit_SE10_0; + return ARMMMUIdxBit_SE10_1 | + ARMMMUIdxBit_SE10_1_PAN | + ARMMMUIdxBit_SE10_0; } else if ((env->cp15.hcr_el2 & (HCR_E2H | HCR_TGE)) == (HCR_E2H | HCR_TGE)) { - return ARMMMUIdxBit_E20_2 | ARMMMUIdxBit_E20_0; + return ARMMMUIdxBit_E20_2 | + ARMMMUIdxBit_E20_2_PAN | + ARMMMUIdxBit_E20_0; } else { - return ARMMMUIdxBit_E10_1 | ARMMMUIdxBit_E10_0; + return ARMMMUIdxBit_E10_1 | + ARMMMUIdxBit_E10_1_PAN | + ARMMMUIdxBit_E10_0; } } @@ -4214,18 +4229,28 @@ static int alle1_tlbmask(CPUARMState *env) * stage 1 translations. */ if (arm_is_secure_below_el3(env)) { - return ARMMMUIdxBit_SE10_1 | ARMMMUIdxBit_SE10_0; + return ARMMMUIdxBit_SE10_1 | + ARMMMUIdxBit_SE10_1_PAN | + ARMMMUIdxBit_SE10_0; } else if (arm_feature(env, ARM_FEATURE_EL2)) { - return ARMMMUIdxBit_E10_1 | ARMMMUIdxBit_E10_0 | ARMMMUIdxBit_Stage2; + return ARMMMUIdxBit_E10_1 | + ARMMMUIdxBit_E10_1_PAN | + ARMMMUIdxBit_E10_0 | + ARMMMUIdxBit_Stage2; } else { - return ARMMMUIdxBit_E10_1 | ARMMMUIdxBit_E10_0; + return ARMMMUIdxBit_E10_1 | + ARMMMUIdxBit_E10_1_PAN | + ARMMMUIdxBit_E10_0; } } static int alle2_tlbmask(CPUARMState *env) { /* TODO: ARMv8.4-SecEL2 */ - return ARMMMUIdxBit_E20_0 | ARMMMUIdxBit_E20_2 | ARMMMUIdxBit_E2; + return ARMMMUIdxBit_E20_0 | + ARMMMUIdxBit_E20_2 | + ARMMMUIdxBit_E20_2_PAN | + ARMMMUIdxBit_E2; } static void tlbi_aa64_alle1_write(CPUARMState *env, const ARMCPRegInfo *ri, @@ -9215,6 +9240,7 @@ static uint32_t regime_el(CPUARMState *env, ARMMMUIdx mmu_idx) switch (mmu_idx) { case ARMMMUIdx_E20_0: case ARMMMUIdx_E20_2: + case ARMMMUIdx_E20_2_PAN: case ARMMMUIdx_Stage2: case ARMMMUIdx_E2: return 2; @@ -9223,10 +9249,13 @@ static uint32_t regime_el(CPUARMState *env, ARMMMUIdx mmu_idx) case ARMMMUIdx_SE10_0: return arm_el_is_aa64(env, 3) ? 1 : 3; case ARMMMUIdx_SE10_1: + case ARMMMUIdx_SE10_1_PAN: case ARMMMUIdx_Stage1_E0: case ARMMMUIdx_Stage1_E1: + case ARMMMUIdx_Stage1_E1_PAN: case ARMMMUIdx_E10_0: case ARMMMUIdx_E10_1: + case ARMMMUIdx_E10_1_PAN: case ARMMMUIdx_MPrivNegPri: case ARMMMUIdx_MUserNegPri: case ARMMMUIdx_MPriv: @@ -9342,6 +9371,8 @@ static inline ARMMMUIdx stage_1_mmu_idx(ARMMMUIdx mmu_idx) return ARMMMUIdx_Stage1_E0; case ARMMMUIdx_E10_1: return ARMMMUIdx_Stage1_E1; + case ARMMMUIdx_E10_1_PAN: + return ARMMMUIdx_Stage1_E1_PAN; default: return mmu_idx; } @@ -9388,6 +9419,7 @@ static inline bool regime_is_user(CPUARMState *env, ARMMMUIdx mmu_idx) return false; case ARMMMUIdx_E10_0: case ARMMMUIdx_E10_1: + case ARMMMUIdx_E10_1_PAN: g_assert_not_reached(); } } @@ -11280,7 +11312,9 @@ bool get_phys_addr(CPUARMState *env, target_ulong address, target_ulong *page_size, ARMMMUFaultInfo *fi, ARMCacheAttrs *cacheattrs) { - if (mmu_idx == ARMMMUIdx_E10_0 || mmu_idx == ARMMMUIdx_E10_1) { + if (mmu_idx == ARMMMUIdx_E10_0 || + mmu_idx == ARMMMUIdx_E10_1 || + mmu_idx == ARMMMUIdx_E10_1_PAN) { /* Call ourselves recursively to do the stage 1 and then stage 2 * translations. */ @@ -11807,10 +11841,13 @@ int arm_mmu_idx_to_el(ARMMMUIdx mmu_idx) case ARMMMUIdx_SE10_0: return 0; case ARMMMUIdx_E10_1: + case ARMMMUIdx_E10_1_PAN: case ARMMMUIdx_SE10_1: + case ARMMMUIdx_SE10_1_PAN: return 1; case ARMMMUIdx_E2: case ARMMMUIdx_E20_2: + case ARMMMUIdx_E20_2_PAN: return 2; case ARMMMUIdx_SE3: return 3; @@ -12027,11 +12064,14 @@ static uint32_t rebuild_hflags_a64(CPUARMState *env, int el, int fp_el, /* TODO: ARMv8.2-UAO */ switch (mmu_idx) { case ARMMMUIdx_E10_1: + case ARMMMUIdx_E10_1_PAN: case ARMMMUIdx_SE10_1: + case ARMMMUIdx_SE10_1_PAN: /* TODO: ARMv8.3-NV */ flags = FIELD_DP32(flags, TBFLAG_A64, UNPRIV, 1); break; case ARMMMUIdx_E20_2: + case ARMMMUIdx_E20_2_PAN: /* TODO: ARMv8.4-SecEL2 */ /* * Note that E20_2 is gated by HCR_EL2.E2H == 1, but E20_0 is diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 6e82486884..49631c2340 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -124,12 +124,15 @@ static int get_a64_user_mem_index(DisasContext *s) */ switch (useridx) { case ARMMMUIdx_E10_1: + case ARMMMUIdx_E10_1_PAN: useridx = ARMMMUIdx_E10_0; break; case ARMMMUIdx_E20_2: + case ARMMMUIdx_E20_2_PAN: useridx = ARMMMUIdx_E20_0; break; case ARMMMUIdx_SE10_1: + case ARMMMUIdx_SE10_1_PAN: useridx = ARMMMUIdx_SE10_0; break; default: diff --git a/target/arm/translate.c b/target/arm/translate.c index e11a5871d0..d58c328e08 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -155,10 +155,12 @@ static inline int get_a32_user_mem_index(DisasContext *s) case ARMMMUIdx_E2: /* this one is UNPREDICTABLE */ case ARMMMUIdx_E10_0: case ARMMMUIdx_E10_1: + case ARMMMUIdx_E10_1_PAN: return arm_to_core_mmu_idx(ARMMMUIdx_E10_0); case ARMMMUIdx_SE3: case ARMMMUIdx_SE10_0: case ARMMMUIdx_SE10_1: + case ARMMMUIdx_SE10_1_PAN: return arm_to_core_mmu_idx(ARMMMUIdx_SE10_0); case ARMMMUIdx_MUser: case ARMMMUIdx_MPriv: -- 2.20.1