From nobody Wed Sep 17 09:05:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4ECEBC4332F for ; Wed, 21 Dec 2022 20:41:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234881AbiLUUlQ (ORCPT ); Wed, 21 Dec 2022 15:41:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35192 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234926AbiLUUk5 (ORCPT ); Wed, 21 Dec 2022 15:40:57 -0500 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6EAD72634 for ; Wed, 21 Dec 2022 12:40:46 -0800 (PST) Received: by mail-pg1-x534.google.com with SMTP id b12so11149543pgj.6 for ; Wed, 21 Dec 2022 12:40:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=TArwYxCFrSBrMRpJqgmbgk8qp38LFtviL46odPa8HP0=; b=joriG+cv4G5IognI3D2VfQaRffHhYNEnG6/gPgyrUznSUi6vU+pa4uUmMWuPboXkYq c9HYtU4HP0Fk18kzdGs1p3UFz08iLnDBwg9+8AraBsq73XGCnW47Z/MjTEg/xTDz5lC1 bda4D9u/1UiBSc8gUR5LVXpfVoOSXBtCK5crRUKDBimqyODd2vz5/j2QqvAoWeerafbn 6KgwTFCAf9YbSuXNCFxtrNGqPFU5NApCnDJRem3m8MUuFJJ0vNXswOT5dKDUhyot0cCo 5N8E5DiA1r559Fyk9UWJdoA2/l5Gl0rXrNxQt23l+Axks7hy+2sHjTJ1KwGaW4sCKqfE Z7SQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TArwYxCFrSBrMRpJqgmbgk8qp38LFtviL46odPa8HP0=; b=DG+qSc6+JR7Urz7RkFpFta5xHl86H5AsfyspR0YJTwnmyWnf5S+foI5W6trUzzWF9f U7DKjS8rqhYDKuI92nftUBWSTS198JRhiGB02kgcUSyD4TR3ncFnJ4Sb46Md00H5lw11 eAqfG/di2woo8B20Y87IKpauRUfFFYSVERxanEUd7qQf65T05AQjfCmwOiPNLeYy4DJa lYB/DBZ0lpCpIoUQj60z5ygCBt00ayupGgG/GyQ9TibASFs6LEzrThCEifQ/1DKGJzA8 1r16NJVBAQsmgmypuyACV46D9ztJCQMHJzF1D8DP6FNBxR+eyzG4CE/pjyER/kC+areR clVg== X-Gm-Message-State: AFqh2kqG2ZW82wtpMu+OHWu5XUuYZtzdGTD20cT56TxoHkli5RD0U2eg oY7LL9//RlNl5Qts61qSStKFSw== X-Google-Smtp-Source: AMrXdXus/NjT2aljajPMuDhUWGdmwEHymPPCIX/Qo0dfF4EdNhn1nOcKImr59bbVgkeHDh9Zm3ksbw== X-Received: by 2002:a05:6a00:1c9f:b0:577:8c7e:7489 with SMTP id y31-20020a056a001c9f00b005778c7e7489mr3110757pfw.10.1671655245905; 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 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 Content-Transfer-Encoding: quoted-printable To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 &=3D ~HCR_RW; =20 - if (cpus_have_const_cap(ARM64_MISMATCHED_CACHE_TYPE) || - vcpu_el1_is_32bit(vcpu)) - vcpu->arch.hcr_el2 |=3D HCR_TID2; - if (kvm_has_mte(vcpu->kvm)) vcpu->arch.hcr_el2 |=3D 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; =20 switch (reg) { - case CSSELR_EL1: *val =3D read_sysreg_s(SYS_CSSELR_EL1); break; case SCTLR_EL1: *val =3D read_sysreg_s(SYS_SCTLR_EL12); break; case CPACR_EL1: *val =3D read_sysreg_s(SYS_CPACR_EL12); break; case TTBR0_EL1: *val =3D 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; =20 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/hy= p/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 *c= txt) =20 static inline void __sysreg_save_el1_state(struct kvm_cpu_context *ctxt) { - ctxt_sys_reg(ctxt, CSSELR_EL1) =3D read_sysreg(csselr_el1); ctxt_sys_reg(ctxt, SCTLR_EL1) =3D read_sysreg_el1(SYS_SCTLR); ctxt_sys_reg(ctxt, CPACR_EL1) =3D read_sysreg_el1(SYS_CPACR); ctxt_sys_reg(ctxt, TTBR0_EL1) =3D 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); =20 if (has_vhe() || !cpus_have_final_cap(ARM64_WORKAROUND_SPECULATIVE_AT)) { --=20 2.38.1