From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B1CCC433E2 for ; Mon, 22 Mar 2021 17:57:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 01FE7619A9 for ; Mon, 22 Mar 2021 17:57:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231197AbhCVR5U (ORCPT ); Mon, 22 Mar 2021 13:57:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:51328 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230228AbhCVR4q (ORCPT ); Mon, 22 Mar 2021 13:56:46 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 83F9961983; Mon, 22 Mar 2021 17:56:46 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lOOnE-0038Fj-Qd; Mon, 22 Mar 2021 17:56:44 +0000 From: Marc Zyngier To: Quentin Perret Cc: catalin.marinas@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, seanjc@google.com, mate.toth-pal@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, tabba@google.com, ardb@kernel.org, mark.rutland@arm.com, dbrazdil@google.com Subject: [PATCH v2 3/3] KVM: arm64: Drop the CPU_FTR_REG_HYP_COPY infrastructure Date: Mon, 22 Mar 2021 17:56:39 +0000 Message-Id: <20210322175639.801566-4-maz@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210322175639.801566-1-maz@kernel.org> References: <20210322175639.801566-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: qperret@google.com, catalin.marinas@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, seanjc@google.com, mate.toth-pal@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, tabba@google.com, ardb@kernel.org, mark.rutland@arm.com, dbrazdil@google.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that the read_ctr macro has been specialised for nVHE, the whole CPU_FTR_REG_HYP_COPY infrastrcture looks completely overengineered. Simplify it by populating the two u64 quantities (MMFR0 and 1) that the hypervisor need. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/cpufeature.h | 1 - arch/arm64/include/asm/kvm_cpufeature.h | 26 ------------------------- arch/arm64/include/asm/kvm_host.h | 4 ---- arch/arm64/include/asm/kvm_hyp.h | 3 +++ arch/arm64/kernel/cpufeature.c | 13 ------------- arch/arm64/kvm/arm.c | 3 +++ arch/arm64/kvm/hyp/nvhe/hyp-smp.c | 8 -------- arch/arm64/kvm/hyp/nvhe/mem_protect.c | 16 ++++++++------- arch/arm64/kvm/sys_regs.c | 22 --------------------- 9 files changed, 15 insertions(+), 81 deletions(-) delete mode 100644 arch/arm64/include/asm/kvm_cpufeature.h diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index a85cea2cac57..61177bac49fa 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -607,7 +607,6 @@ void check_local_cpu_capabilities(void); u64 read_sanitised_ftr_reg(u32 id); u64 __read_sysreg_by_encoding(u32 sys_id); -int copy_ftr_reg(u32 id, struct arm64_ftr_reg *dst); static inline bool cpu_supports_mixed_endian_el0(void) { diff --git a/arch/arm64/include/asm/kvm_cpufeature.h b/arch/arm64/include/asm/kvm_cpufeature.h deleted file mode 100644 index ff302d15e840..000000000000 --- a/arch/arm64/include/asm/kvm_cpufeature.h +++ /dev/null @@ -1,26 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright (C) 2020 - Google LLC - * Author: Quentin Perret - */ - -#ifndef __ARM64_KVM_CPUFEATURE_H__ -#define __ARM64_KVM_CPUFEATURE_H__ - -#include - -#include - -#if defined(__KVM_NVHE_HYPERVISOR__) -#define DECLARE_KVM_HYP_CPU_FTR_REG(name) extern struct arm64_ftr_reg name -#define DEFINE_KVM_HYP_CPU_FTR_REG(name) struct arm64_ftr_reg name -#else -#define DECLARE_KVM_HYP_CPU_FTR_REG(name) extern struct arm64_ftr_reg kvm_nvhe_sym(name) -#define DEFINE_KVM_HYP_CPU_FTR_REG(name) BUILD_BUG() -#endif - -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0); -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1); -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1); - -#endif diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 4859c9de75d7..09979cdec28b 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -740,13 +740,9 @@ void kvm_clr_pmu_events(u32 clr); void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu); void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu); - -void setup_kvm_el2_caps(void); #else static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {} static inline void kvm_clr_pmu_events(u32 clr) {} - -static inline void setup_kvm_el2_caps(void) {} #endif void kvm_vcpu_load_sysregs_vhe(struct kvm_vcpu *vcpu); diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h index de40a565d7e5..8ef9d88826d4 100644 --- a/arch/arm64/include/asm/kvm_hyp.h +++ b/arch/arm64/include/asm/kvm_hyp.h @@ -116,4 +116,7 @@ int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus, void __noreturn __host_enter(struct kvm_cpu_context *host_ctxt); #endif +extern u64 kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val); +extern u64 kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val); + #endif /* __ARM64_KVM_HYP_H__ */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6252476e4e73..066030717a4c 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1154,18 +1154,6 @@ u64 read_sanitised_ftr_reg(u32 id) } EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg); -int copy_ftr_reg(u32 id, struct arm64_ftr_reg *dst) -{ - struct arm64_ftr_reg *regp = get_arm64_ftr_reg(id); - - if (!regp) - return -EINVAL; - - *dst = *regp; - - return 0; -} - #define read_sysreg_case(r) \ case r: val = read_sysreg_s(r); break; @@ -2785,7 +2773,6 @@ void __init setup_cpu_features(void) setup_system_capabilities(); setup_elf_hwcaps(arm64_elf_hwcaps); - setup_kvm_el2_caps(); if (system_supports_32bit_el0()) setup_elf_hwcaps(compat_elf_hwcaps); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 368159021dee..2835400fd298 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1730,6 +1730,9 @@ static int kvm_hyp_init_protection(u32 hyp_va_bits) void *addr = phys_to_virt(hyp_mem_base); int ret; + kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1); + kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1); + ret = create_hyp_mappings(addr, addr + hyp_mem_size, PAGE_HYP); if (ret) return ret; diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c index 17ad1b3a9530..879559057dee 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c @@ -5,17 +5,9 @@ */ #include -#include #include #include -/* - * Copies of the host's CPU features registers holding sanitized values. - */ -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0); -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1); -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1); - /* * nVHE copy of data structures tracking available CPU cores. * Only entries for CPUs that were online at KVM init are populated. diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c index 808e2471091b..f4f364aa3282 100644 --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c @@ -5,7 +5,6 @@ */ #include -#include #include #include #include @@ -27,6 +26,12 @@ struct host_kvm host_kvm; struct hyp_pool host_s2_mem; struct hyp_pool host_s2_dev; +/* + * Copies of the host's CPU features registers holding sanitized values. + */ +u64 id_aa64mmfr0_el1_sys_val; +u64 id_aa64mmfr1_el1_sys_val; + static const u8 pkvm_hyp_id = 1; static void *host_s2_zalloc_pages_exact(size_t size) @@ -72,16 +77,13 @@ static int prepare_s2_pools(void *mem_pgt_pool, void *dev_pgt_pool) static void prepare_host_vtcr(void) { u32 parange, phys_shift; - u64 mmfr0, mmfr1; - - mmfr0 = arm64_ftr_reg_id_aa64mmfr0_el1.sys_val; - mmfr1 = arm64_ftr_reg_id_aa64mmfr1_el1.sys_val; /* The host stage 2 is id-mapped, so use parange for T0SZ */ - parange = kvm_get_parange(mmfr0); + parange = kvm_get_parange(id_aa64mmfr0_el1_sys_val); phys_shift = id_aa64mmfr0_parange_to_phys_shift(parange); - host_kvm.arch.vtcr = kvm_get_vtcr(mmfr0, mmfr1, phys_shift); + host_kvm.arch.vtcr = kvm_get_vtcr(id_aa64mmfr0_el1_sys_val, + id_aa64mmfr1_el1_sys_val, phys_shift); } int kvm_host_prepare_stage2(void *mem_pgt_pool, void *dev_pgt_pool) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index dfb3b4f9ca84..4f2f1e3145de 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -21,7 +21,6 @@ #include #include #include -#include #include #include #include @@ -2776,24 +2775,3 @@ void kvm_sys_reg_table_init(void) /* Clear all higher bits. */ cache_levels &= (1 << (i*3))-1; } - -#define CPU_FTR_REG_HYP_COPY(id, name) \ - { .sys_id = id, .dst = (struct arm64_ftr_reg *)&kvm_nvhe_sym(name) } -struct __ftr_reg_copy_entry { - u32 sys_id; - struct arm64_ftr_reg *dst; -} hyp_ftr_regs[] __initdata = { - CPU_FTR_REG_HYP_COPY(SYS_CTR_EL0, arm64_ftr_reg_ctrel0), - CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR0_EL1, arm64_ftr_reg_id_aa64mmfr0_el1), - CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR1_EL1, arm64_ftr_reg_id_aa64mmfr1_el1), -}; - -void __init setup_kvm_el2_caps(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(hyp_ftr_regs); i++) { - WARN(copy_ftr_reg(hyp_ftr_regs[i].sys_id, hyp_ftr_regs[i].dst), - "%u feature register not found\n", hyp_ftr_regs[i].sys_id); - } -} -- 2.29.2 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBCE4C433E1 for ; Mon, 22 Mar 2021 17:56:55 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 4D8766197F for ; Mon, 22 Mar 2021 17:56:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4D8766197F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id E8F704B358; Mon, 22 Mar 2021 13:56:54 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id C36IKSpF1YM8; Mon, 22 Mar 2021 13:56:53 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 12BD94B37B; Mon, 22 Mar 2021 13:56:52 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id E360C4B331 for ; Mon, 22 Mar 2021 13:56:48 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id V06YtUhY422x for ; Mon, 22 Mar 2021 13:56:47 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 65BC44B2FC for ; Mon, 22 Mar 2021 13:56:47 -0400 (EDT) Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 83F9961983; Mon, 22 Mar 2021 17:56:46 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lOOnE-0038Fj-Qd; Mon, 22 Mar 2021 17:56:44 +0000 From: Marc Zyngier To: Quentin Perret Subject: [PATCH v2 3/3] KVM: arm64: Drop the CPU_FTR_REG_HYP_COPY infrastructure Date: Mon, 22 Mar 2021 17:56:39 +0000 Message-Id: <20210322175639.801566-4-maz@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210322175639.801566-1-maz@kernel.org> References: <20210322175639.801566-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: qperret@google.com, catalin.marinas@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, seanjc@google.com, mate.toth-pal@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, tabba@google.com, ardb@kernel.org, mark.rutland@arm.com, dbrazdil@google.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: android-kvm@google.com, catalin.marinas@arm.com, mate.toth-pal@arm.com, tabba@google.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, seanjc@google.com, kernel-team@android.com, kvmarm@lists.cs.columbia.edu X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Now that the read_ctr macro has been specialised for nVHE, the whole CPU_FTR_REG_HYP_COPY infrastrcture looks completely overengineered. Simplify it by populating the two u64 quantities (MMFR0 and 1) that the hypervisor need. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/cpufeature.h | 1 - arch/arm64/include/asm/kvm_cpufeature.h | 26 ------------------------- arch/arm64/include/asm/kvm_host.h | 4 ---- arch/arm64/include/asm/kvm_hyp.h | 3 +++ arch/arm64/kernel/cpufeature.c | 13 ------------- arch/arm64/kvm/arm.c | 3 +++ arch/arm64/kvm/hyp/nvhe/hyp-smp.c | 8 -------- arch/arm64/kvm/hyp/nvhe/mem_protect.c | 16 ++++++++------- arch/arm64/kvm/sys_regs.c | 22 --------------------- 9 files changed, 15 insertions(+), 81 deletions(-) delete mode 100644 arch/arm64/include/asm/kvm_cpufeature.h diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index a85cea2cac57..61177bac49fa 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -607,7 +607,6 @@ void check_local_cpu_capabilities(void); u64 read_sanitised_ftr_reg(u32 id); u64 __read_sysreg_by_encoding(u32 sys_id); -int copy_ftr_reg(u32 id, struct arm64_ftr_reg *dst); static inline bool cpu_supports_mixed_endian_el0(void) { diff --git a/arch/arm64/include/asm/kvm_cpufeature.h b/arch/arm64/include/asm/kvm_cpufeature.h deleted file mode 100644 index ff302d15e840..000000000000 --- a/arch/arm64/include/asm/kvm_cpufeature.h +++ /dev/null @@ -1,26 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright (C) 2020 - Google LLC - * Author: Quentin Perret - */ - -#ifndef __ARM64_KVM_CPUFEATURE_H__ -#define __ARM64_KVM_CPUFEATURE_H__ - -#include - -#include - -#if defined(__KVM_NVHE_HYPERVISOR__) -#define DECLARE_KVM_HYP_CPU_FTR_REG(name) extern struct arm64_ftr_reg name -#define DEFINE_KVM_HYP_CPU_FTR_REG(name) struct arm64_ftr_reg name -#else -#define DECLARE_KVM_HYP_CPU_FTR_REG(name) extern struct arm64_ftr_reg kvm_nvhe_sym(name) -#define DEFINE_KVM_HYP_CPU_FTR_REG(name) BUILD_BUG() -#endif - -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0); -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1); -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1); - -#endif diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 4859c9de75d7..09979cdec28b 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -740,13 +740,9 @@ void kvm_clr_pmu_events(u32 clr); void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu); void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu); - -void setup_kvm_el2_caps(void); #else static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {} static inline void kvm_clr_pmu_events(u32 clr) {} - -static inline void setup_kvm_el2_caps(void) {} #endif void kvm_vcpu_load_sysregs_vhe(struct kvm_vcpu *vcpu); diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h index de40a565d7e5..8ef9d88826d4 100644 --- a/arch/arm64/include/asm/kvm_hyp.h +++ b/arch/arm64/include/asm/kvm_hyp.h @@ -116,4 +116,7 @@ int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus, void __noreturn __host_enter(struct kvm_cpu_context *host_ctxt); #endif +extern u64 kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val); +extern u64 kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val); + #endif /* __ARM64_KVM_HYP_H__ */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6252476e4e73..066030717a4c 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1154,18 +1154,6 @@ u64 read_sanitised_ftr_reg(u32 id) } EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg); -int copy_ftr_reg(u32 id, struct arm64_ftr_reg *dst) -{ - struct arm64_ftr_reg *regp = get_arm64_ftr_reg(id); - - if (!regp) - return -EINVAL; - - *dst = *regp; - - return 0; -} - #define read_sysreg_case(r) \ case r: val = read_sysreg_s(r); break; @@ -2785,7 +2773,6 @@ void __init setup_cpu_features(void) setup_system_capabilities(); setup_elf_hwcaps(arm64_elf_hwcaps); - setup_kvm_el2_caps(); if (system_supports_32bit_el0()) setup_elf_hwcaps(compat_elf_hwcaps); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 368159021dee..2835400fd298 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1730,6 +1730,9 @@ static int kvm_hyp_init_protection(u32 hyp_va_bits) void *addr = phys_to_virt(hyp_mem_base); int ret; + kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1); + kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1); + ret = create_hyp_mappings(addr, addr + hyp_mem_size, PAGE_HYP); if (ret) return ret; diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c index 17ad1b3a9530..879559057dee 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c @@ -5,17 +5,9 @@ */ #include -#include #include #include -/* - * Copies of the host's CPU features registers holding sanitized values. - */ -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0); -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1); -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1); - /* * nVHE copy of data structures tracking available CPU cores. * Only entries for CPUs that were online at KVM init are populated. diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c index 808e2471091b..f4f364aa3282 100644 --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c @@ -5,7 +5,6 @@ */ #include -#include #include #include #include @@ -27,6 +26,12 @@ struct host_kvm host_kvm; struct hyp_pool host_s2_mem; struct hyp_pool host_s2_dev; +/* + * Copies of the host's CPU features registers holding sanitized values. + */ +u64 id_aa64mmfr0_el1_sys_val; +u64 id_aa64mmfr1_el1_sys_val; + static const u8 pkvm_hyp_id = 1; static void *host_s2_zalloc_pages_exact(size_t size) @@ -72,16 +77,13 @@ static int prepare_s2_pools(void *mem_pgt_pool, void *dev_pgt_pool) static void prepare_host_vtcr(void) { u32 parange, phys_shift; - u64 mmfr0, mmfr1; - - mmfr0 = arm64_ftr_reg_id_aa64mmfr0_el1.sys_val; - mmfr1 = arm64_ftr_reg_id_aa64mmfr1_el1.sys_val; /* The host stage 2 is id-mapped, so use parange for T0SZ */ - parange = kvm_get_parange(mmfr0); + parange = kvm_get_parange(id_aa64mmfr0_el1_sys_val); phys_shift = id_aa64mmfr0_parange_to_phys_shift(parange); - host_kvm.arch.vtcr = kvm_get_vtcr(mmfr0, mmfr1, phys_shift); + host_kvm.arch.vtcr = kvm_get_vtcr(id_aa64mmfr0_el1_sys_val, + id_aa64mmfr1_el1_sys_val, phys_shift); } int kvm_host_prepare_stage2(void *mem_pgt_pool, void *dev_pgt_pool) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index dfb3b4f9ca84..4f2f1e3145de 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -21,7 +21,6 @@ #include #include #include -#include #include #include #include @@ -2776,24 +2775,3 @@ void kvm_sys_reg_table_init(void) /* Clear all higher bits. */ cache_levels &= (1 << (i*3))-1; } - -#define CPU_FTR_REG_HYP_COPY(id, name) \ - { .sys_id = id, .dst = (struct arm64_ftr_reg *)&kvm_nvhe_sym(name) } -struct __ftr_reg_copy_entry { - u32 sys_id; - struct arm64_ftr_reg *dst; -} hyp_ftr_regs[] __initdata = { - CPU_FTR_REG_HYP_COPY(SYS_CTR_EL0, arm64_ftr_reg_ctrel0), - CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR0_EL1, arm64_ftr_reg_id_aa64mmfr0_el1), - CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR1_EL1, arm64_ftr_reg_id_aa64mmfr1_el1), -}; - -void __init setup_kvm_el2_caps(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(hyp_ftr_regs); i++) { - WARN(copy_ftr_reg(hyp_ftr_regs[i].sys_id, hyp_ftr_regs[i].dst), - "%u feature register not found\n", hyp_ftr_regs[i].sys_id); - } -} -- 2.29.2 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBAFBC433DB for ; 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Mon, 22 Mar 2021 17:56:46 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lOOnE-0038Fj-Qd; Mon, 22 Mar 2021 17:56:44 +0000 From: Marc Zyngier To: Quentin Perret Cc: catalin.marinas@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, seanjc@google.com, mate.toth-pal@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, tabba@google.com, ardb@kernel.org, mark.rutland@arm.com, dbrazdil@google.com Subject: [PATCH v2 3/3] KVM: arm64: Drop the CPU_FTR_REG_HYP_COPY infrastructure Date: Mon, 22 Mar 2021 17:56:39 +0000 Message-Id: <20210322175639.801566-4-maz@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210322175639.801566-1-maz@kernel.org> References: <20210322175639.801566-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: qperret@google.com, catalin.marinas@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, seanjc@google.com, mate.toth-pal@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, tabba@google.com, ardb@kernel.org, mark.rutland@arm.com, dbrazdil@google.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210322_175648_186484_9FF2C94D X-CRM114-Status: GOOD ( 22.41 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Now that the read_ctr macro has been specialised for nVHE, the whole CPU_FTR_REG_HYP_COPY infrastrcture looks completely overengineered. Simplify it by populating the two u64 quantities (MMFR0 and 1) that the hypervisor need. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/cpufeature.h | 1 - arch/arm64/include/asm/kvm_cpufeature.h | 26 ------------------------- arch/arm64/include/asm/kvm_host.h | 4 ---- arch/arm64/include/asm/kvm_hyp.h | 3 +++ arch/arm64/kernel/cpufeature.c | 13 ------------- arch/arm64/kvm/arm.c | 3 +++ arch/arm64/kvm/hyp/nvhe/hyp-smp.c | 8 -------- arch/arm64/kvm/hyp/nvhe/mem_protect.c | 16 ++++++++------- arch/arm64/kvm/sys_regs.c | 22 --------------------- 9 files changed, 15 insertions(+), 81 deletions(-) delete mode 100644 arch/arm64/include/asm/kvm_cpufeature.h diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index a85cea2cac57..61177bac49fa 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -607,7 +607,6 @@ void check_local_cpu_capabilities(void); u64 read_sanitised_ftr_reg(u32 id); u64 __read_sysreg_by_encoding(u32 sys_id); -int copy_ftr_reg(u32 id, struct arm64_ftr_reg *dst); static inline bool cpu_supports_mixed_endian_el0(void) { diff --git a/arch/arm64/include/asm/kvm_cpufeature.h b/arch/arm64/include/asm/kvm_cpufeature.h deleted file mode 100644 index ff302d15e840..000000000000 --- a/arch/arm64/include/asm/kvm_cpufeature.h +++ /dev/null @@ -1,26 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright (C) 2020 - Google LLC - * Author: Quentin Perret - */ - -#ifndef __ARM64_KVM_CPUFEATURE_H__ -#define __ARM64_KVM_CPUFEATURE_H__ - -#include - -#include - -#if defined(__KVM_NVHE_HYPERVISOR__) -#define DECLARE_KVM_HYP_CPU_FTR_REG(name) extern struct arm64_ftr_reg name -#define DEFINE_KVM_HYP_CPU_FTR_REG(name) struct arm64_ftr_reg name -#else -#define DECLARE_KVM_HYP_CPU_FTR_REG(name) extern struct arm64_ftr_reg kvm_nvhe_sym(name) -#define DEFINE_KVM_HYP_CPU_FTR_REG(name) BUILD_BUG() -#endif - -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0); -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1); -DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1); - -#endif diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 4859c9de75d7..09979cdec28b 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -740,13 +740,9 @@ void kvm_clr_pmu_events(u32 clr); void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu); void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu); - -void setup_kvm_el2_caps(void); #else static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {} static inline void kvm_clr_pmu_events(u32 clr) {} - -static inline void setup_kvm_el2_caps(void) {} #endif void kvm_vcpu_load_sysregs_vhe(struct kvm_vcpu *vcpu); diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h index de40a565d7e5..8ef9d88826d4 100644 --- a/arch/arm64/include/asm/kvm_hyp.h +++ b/arch/arm64/include/asm/kvm_hyp.h @@ -116,4 +116,7 @@ int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus, void __noreturn __host_enter(struct kvm_cpu_context *host_ctxt); #endif +extern u64 kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val); +extern u64 kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val); + #endif /* __ARM64_KVM_HYP_H__ */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6252476e4e73..066030717a4c 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1154,18 +1154,6 @@ u64 read_sanitised_ftr_reg(u32 id) } EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg); -int copy_ftr_reg(u32 id, struct arm64_ftr_reg *dst) -{ - struct arm64_ftr_reg *regp = get_arm64_ftr_reg(id); - - if (!regp) - return -EINVAL; - - *dst = *regp; - - return 0; -} - #define read_sysreg_case(r) \ case r: val = read_sysreg_s(r); break; @@ -2785,7 +2773,6 @@ void __init setup_cpu_features(void) setup_system_capabilities(); setup_elf_hwcaps(arm64_elf_hwcaps); - setup_kvm_el2_caps(); if (system_supports_32bit_el0()) setup_elf_hwcaps(compat_elf_hwcaps); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 368159021dee..2835400fd298 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1730,6 +1730,9 @@ static int kvm_hyp_init_protection(u32 hyp_va_bits) void *addr = phys_to_virt(hyp_mem_base); int ret; + kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1); + kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1); + ret = create_hyp_mappings(addr, addr + hyp_mem_size, PAGE_HYP); if (ret) return ret; diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c index 17ad1b3a9530..879559057dee 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c @@ -5,17 +5,9 @@ */ #include -#include #include #include -/* - * Copies of the host's CPU features registers holding sanitized values. - */ -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0); -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1); -DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1); - /* * nVHE copy of data structures tracking available CPU cores. * Only entries for CPUs that were online at KVM init are populated. diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c index 808e2471091b..f4f364aa3282 100644 --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c @@ -5,7 +5,6 @@ */ #include -#include #include #include #include @@ -27,6 +26,12 @@ struct host_kvm host_kvm; struct hyp_pool host_s2_mem; struct hyp_pool host_s2_dev; +/* + * Copies of the host's CPU features registers holding sanitized values. + */ +u64 id_aa64mmfr0_el1_sys_val; +u64 id_aa64mmfr1_el1_sys_val; + static const u8 pkvm_hyp_id = 1; static void *host_s2_zalloc_pages_exact(size_t size) @@ -72,16 +77,13 @@ static int prepare_s2_pools(void *mem_pgt_pool, void *dev_pgt_pool) static void prepare_host_vtcr(void) { u32 parange, phys_shift; - u64 mmfr0, mmfr1; - - mmfr0 = arm64_ftr_reg_id_aa64mmfr0_el1.sys_val; - mmfr1 = arm64_ftr_reg_id_aa64mmfr1_el1.sys_val; /* The host stage 2 is id-mapped, so use parange for T0SZ */ - parange = kvm_get_parange(mmfr0); + parange = kvm_get_parange(id_aa64mmfr0_el1_sys_val); phys_shift = id_aa64mmfr0_parange_to_phys_shift(parange); - host_kvm.arch.vtcr = kvm_get_vtcr(mmfr0, mmfr1, phys_shift); + host_kvm.arch.vtcr = kvm_get_vtcr(id_aa64mmfr0_el1_sys_val, + id_aa64mmfr1_el1_sys_val, phys_shift); } int kvm_host_prepare_stage2(void *mem_pgt_pool, void *dev_pgt_pool) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index dfb3b4f9ca84..4f2f1e3145de 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -21,7 +21,6 @@ #include #include #include -#include #include #include #include @@ -2776,24 +2775,3 @@ void kvm_sys_reg_table_init(void) /* Clear all higher bits. */ cache_levels &= (1 << (i*3))-1; } - -#define CPU_FTR_REG_HYP_COPY(id, name) \ - { .sys_id = id, .dst = (struct arm64_ftr_reg *)&kvm_nvhe_sym(name) } -struct __ftr_reg_copy_entry { - u32 sys_id; - struct arm64_ftr_reg *dst; -} hyp_ftr_regs[] __initdata = { - CPU_FTR_REG_HYP_COPY(SYS_CTR_EL0, arm64_ftr_reg_ctrel0), - CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR0_EL1, arm64_ftr_reg_id_aa64mmfr0_el1), - CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR1_EL1, arm64_ftr_reg_id_aa64mmfr1_el1), -}; - -void __init setup_kvm_el2_caps(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(hyp_ftr_regs); i++) { - WARN(copy_ftr_reg(hyp_ftr_regs[i].sys_id, hyp_ftr_regs[i].dst), - "%u feature register not found\n", hyp_ftr_regs[i].sys_id); - } -} -- 2.29.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel