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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 809B9C433EF for ; Fri, 15 Apr 2022 00:43:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348146AbiDOAqW (ORCPT ); Thu, 14 Apr 2022 20:46:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37130 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348110AbiDOAqQ (ORCPT ); Thu, 14 Apr 2022 20:46:16 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A383996832 for ; Thu, 14 Apr 2022 17:43:50 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id o190-20020a62cdc7000000b0050835e37396so1285031pfg.14 for ; Thu, 14 Apr 2022 17:43:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=VDBBxbRymwn99ifXkPvrfvP8JeLntCySB5qG2FLdHGc=; b=FuTYBhDITxI66Qxt5+87xMlO2q0C9iJXI9s7fddQAntJKNcZhy4i5CX3Vpr1K7b1gG lpGYjjhgm/CKQjYxIZBLOAlu6Wf9zZOr5BTnS1Mm46MrfyyFviEAqnWwqxLbNvwWcsyf JvdoNGNXJ/6sDa03DP7PftstcK+dADaHLntSvUANgU/0B4isfM6BZs4hWPzvL2xkAlhB CUMjlksohwVrJztO8x/MgujxI4iPE/ysUfovmABWThXxb2g+rlV8zXfjr6a4wKFGQQ8A 2BioePglRBUYrzqDp/34X5DBOonLRTI2L6fETCpuSbqRp5Wtv6N/vgi4/Y0xhSy1jDZu aMxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=VDBBxbRymwn99ifXkPvrfvP8JeLntCySB5qG2FLdHGc=; b=CJlk63/TZiKTlzw/pS7DlO5BPHmQMyn2thBddZsMUaaxKR4P8f4aawxLRU9bxG4JK1 D94/7mwUAnUWMO2p2PhoabrW+60TH/j0y7Tfjv9TC7DwXKQ0a3mmJNKag7EYj6ZfKMOu XJ+EVpGxpcLX2PIu6tNYjcO2qrOhHvJWxZwSZrKwe+cZWWpoNq/Wbg850VmvcNXyI69T 3S5RJlrShQexNX8BeaIU1E+G7mrRF6DL2+UsBJTLHbtfZVytxN27GdUyJ4YqOM7365NX n2C460UWRAkkDVM9OFN9oepyMAWry0/MUkzRz84fzn3JYsCkYxmJGiToV93yBXTq7D+L TmRw== X-Gm-Message-State: AOAM531CekqAnEUpj2ye4zzA5GeB8SJ0Yh+XRTWguzyf7plo8tbC3qEz zgwmmJ5PX1WJEApuD8JO3/aMDu57adE= X-Google-Smtp-Source: ABdhPJxWvnh9vGPdu8WwNvP/XothzcdXxz8DVteSxV4BWZ39Cw9eF09ZeKITExpxjd/oejtHjB373C4/RJY= X-Received: from seanjc.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:3e5]) (user=seanjc job=sendgmr) by 2002:a05:6a00:1a90:b0:506:1e27:a579 with SMTP id e16-20020a056a001a9000b005061e27a579mr6426109pfv.46.1649983430118; Thu, 14 Apr 2022 17:43:50 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 15 Apr 2022 00:43:42 +0000 In-Reply-To: <20220415004343.2203171-1-seanjc@google.com> Message-Id: <20220415004343.2203171-3-seanjc@google.com> Mime-Version: 1.0 References: <20220415004343.2203171-1-seanjc@google.com> X-Mailer: git-send-email 2.36.0.rc0.470.gd361397f0d-goog Subject: [PATCH 2/3] KVM: RISC-V: Use kvm_vcpu.srcu_idx, drop RISC-V's unnecessary copy From: Sean Christopherson To: Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Paolo Bonzini Cc: Atish Patra , David Hildenbrand , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use the generic kvm_vcpu's srcu_idx instead of using an indentical field in RISC-V's version of kvm_vcpu_arch. Generic KVM very intentionally does not touch vcpu->srcu_idx, i.e. there's zero chance of running afoul of common code. Signed-off-by: Sean Christopherson --- arch/riscv/include/asm/kvm_host.h | 3 --- arch/riscv/kvm/vcpu.c | 16 ++++++++-------- arch/riscv/kvm/vcpu_exit.c | 4 ++-- 3 files changed, 10 insertions(+), 13 deletions(-) diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 78da839657e5..cd4bbcecb0fb 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -193,9 +193,6 @@ struct kvm_vcpu_arch { /* Don't run the VCPU (blocked) */ bool pause; - - /* SRCU lock index for in-kernel run loop */ - int srcu_idx; }; static inline void kvm_arch_hardware_unsetup(void) {} diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index 6785aef4cbd4..2f1caf23eed4 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -724,13 +724,13 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) /* Mark this VCPU ran at least once */ vcpu->arch.ran_atleast_once = true; - vcpu->arch.srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); + vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); /* Process MMIO value returned from user-space */ if (run->exit_reason == KVM_EXIT_MMIO) { ret = kvm_riscv_vcpu_mmio_return(vcpu, vcpu->run); if (ret) { - srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); return ret; } } @@ -739,13 +739,13 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) if (run->exit_reason == KVM_EXIT_RISCV_SBI) { ret = kvm_riscv_vcpu_sbi_return(vcpu, vcpu->run); if (ret) { - srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); return ret; } } if (run->immediate_exit) { - srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); return -EINTR; } @@ -784,7 +784,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) */ vcpu->mode = IN_GUEST_MODE; - srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); smp_mb__after_srcu_read_unlock(); /* @@ -802,7 +802,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) vcpu->mode = OUTSIDE_GUEST_MODE; local_irq_enable(); preempt_enable(); - vcpu->arch.srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); + vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); continue; } @@ -846,7 +846,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) preempt_enable(); - vcpu->arch.srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); + vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); ret = kvm_riscv_vcpu_exit(vcpu, run, &trap); } @@ -855,7 +855,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) vcpu_put(vcpu); - srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); return ret; } diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c index aa8af129e4bb..2d56faddb9d1 100644 --- a/arch/riscv/kvm/vcpu_exit.c +++ b/arch/riscv/kvm/vcpu_exit.c @@ -456,9 +456,9 @@ static int stage2_page_fault(struct kvm_vcpu *vcpu, struct kvm_run *run, void kvm_riscv_vcpu_wfi(struct kvm_vcpu *vcpu) { if (!kvm_arch_vcpu_runnable(vcpu)) { - srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); kvm_vcpu_halt(vcpu); - vcpu->arch.srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); + vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); kvm_clear_request(KVM_REQ_UNHALT, vcpu); } } -- 2.36.0.rc0.470.gd361397f0d-goog