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Wed, 21 Dec 2022 12:40:45 -0800 (PST) Received: from fedora.flets-east.jp ([2400:4050:c360:8200:8ae8:3c4:c0da:7419]) by smtp.gmail.com with ESMTPSA id r4-20020aa79884000000b005763c22ea07sm11017784pfl.74.2022.12.21.12.40.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Dec 2022 12:40:45 -0800 (PST) From: Akihiko Odaki To: Cc: Mark Brown , Marc Zyngier , linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Mathieu Poirier , Oliver Upton , Suzuki K Poulose , Alexandru Elisei , James Morse , Will Deacon , Catalin Marinas , asahi@lists.linux.dev, Alyssa Rosenzweig , Sven Peter , Hector Martin , Akihiko Odaki Subject: [PATCH v4 5/7] KVM: arm64: Always set HCR_TID2 Date: Thu, 22 Dec 2022 05:40:14 +0900 Message-Id: <20221221204016.658874-6-akihiko.odaki@daynix.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221221204016.658874-1-akihiko.odaki@daynix.com> References: <20221221204016.658874-1-akihiko.odaki@daynix.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221221_124046_334457_5A16156C X-CRM114-Status: GOOD ( 13.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Always set HCR_TID2 to trap CTR_EL0, CCSIDR2_EL1, CLIDR_EL1, and CSSELR_EL1. This saves a few lines of code and allows to employ their access trap handlers for more purposes anticipated by the old condition for setting HCR_TID2. Suggested-by: Marc Zyngier Signed-off-by: Akihiko Odaki --- arch/arm64/include/asm/kvm_arm.h | 3 ++- arch/arm64/include/asm/kvm_emulate.h | 4 ---- arch/arm64/include/asm/kvm_host.h | 2 -- arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 2 -- 4 files changed, 2 insertions(+), 9 deletions(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 8aa8492dafc0..44be46c280c1 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -81,11 +81,12 @@ * SWIO: Turn set/way invalidates into set/way clean+invalidate * PTW: Take a stage2 fault if a stage1 walk steps in device memory * TID3: Trap EL1 reads of group 3 ID registers + * TID2: Trap CTR_EL0, CCSIDR2_EL1, CLIDR_EL1, and CSSELR_EL1 */ #define HCR_GUEST_FLAGS (HCR_TSC | HCR_TSW | HCR_TWE | HCR_TWI | HCR_VM | \ HCR_BSU_IS | HCR_FB | HCR_TACR | \ HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW | HCR_TLOR | \ - HCR_FMO | HCR_IMO | HCR_PTW | HCR_TID3 ) + HCR_FMO | HCR_IMO | HCR_PTW | HCR_TID3 | HCR_TID2) #define HCR_VIRT_EXCP_MASK (HCR_VSE | HCR_VI | HCR_VF) #define HCR_HOST_NVHE_FLAGS (HCR_RW | HCR_API | HCR_APK | HCR_ATA) #define HCR_HOST_NVHE_PROTECTED_FLAGS (HCR_HOST_NVHE_FLAGS | HCR_TSC) diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index 9bdba47f7e14..30c4598d643b 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -88,10 +88,6 @@ static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) if (vcpu_el1_is_32bit(vcpu)) vcpu->arch.hcr_el2 &= ~HCR_RW; - if (cpus_have_const_cap(ARM64_MISMATCHED_CACHE_TYPE) || - vcpu_el1_is_32bit(vcpu)) - vcpu->arch.hcr_el2 |= HCR_TID2; - if (kvm_has_mte(vcpu->kvm)) vcpu->arch.hcr_el2 |= HCR_ATA; } diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 45e2136322ba..cc2ede0eaed4 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -621,7 +621,6 @@ static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val) return false; switch (reg) { - case CSSELR_EL1: *val = read_sysreg_s(SYS_CSSELR_EL1); break; case SCTLR_EL1: *val = read_sysreg_s(SYS_SCTLR_EL12); break; case CPACR_EL1: *val = read_sysreg_s(SYS_CPACR_EL12); break; case TTBR0_EL1: *val = read_sysreg_s(SYS_TTBR0_EL12); break; @@ -666,7 +665,6 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg) return false; switch (reg) { - case CSSELR_EL1: write_sysreg_s(val, SYS_CSSELR_EL1); break; case SCTLR_EL1: write_sysreg_s(val, SYS_SCTLR_EL12); break; case CPACR_EL1: write_sysreg_s(val, SYS_CPACR_EL12); break; case TTBR0_EL1: write_sysreg_s(val, SYS_TTBR0_EL12); break; diff --git a/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h b/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h index baa5b9b3dde5..147cb4c846c6 100644 --- a/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h +++ b/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h @@ -39,7 +39,6 @@ static inline bool ctxt_has_mte(struct kvm_cpu_context *ctxt) static inline void __sysreg_save_el1_state(struct kvm_cpu_context *ctxt) { - ctxt_sys_reg(ctxt, CSSELR_EL1) = read_sysreg(csselr_el1); ctxt_sys_reg(ctxt, SCTLR_EL1) = read_sysreg_el1(SYS_SCTLR); ctxt_sys_reg(ctxt, CPACR_EL1) = read_sysreg_el1(SYS_CPACR); ctxt_sys_reg(ctxt, TTBR0_EL1) = read_sysreg_el1(SYS_TTBR0); @@ -95,7 +94,6 @@ static inline void __sysreg_restore_user_state(struct kvm_cpu_context *ctxt) static inline void __sysreg_restore_el1_state(struct kvm_cpu_context *ctxt) { write_sysreg(ctxt_sys_reg(ctxt, MPIDR_EL1), vmpidr_el2); - write_sysreg(ctxt_sys_reg(ctxt, CSSELR_EL1), csselr_el1); if (has_vhe() || !cpus_have_final_cap(ARM64_WORKAROUND_SPECULATIVE_AT)) {