From patchwork Sat Jul 15 00:53:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raghavendra Rao Ananta X-Patchwork-Id: 13314329 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5B0E5C001B0 for ; Sat, 15 Jul 2023 02:01:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:From:Subject:Message-ID: References:Mime-Version:In-Reply-To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=TbI7sXf8/Du32oIh03vxlQk7YAxPRKireNJ5lK+V5Jg=; b=OKN7+n7BXaYSqZwQON+EMwpEfg Ofr7hkpAWM5raRmuQj1NYwFVFD1pIhGwzQphYEUt4uzMOhKJ+A7s6efzB2YWbDe9BrxLbYRhlgr+A z2JsdLXyqkJ6OjSrYNOWqhC0IZhpq+mekOZYWjvSQU0ccmoAP/gKAb3cMt1c9+nsudQyhdMw2g55j W6EAuxFcqtxM5rvmQJ4egzkz7rzUKKyseRtQQVsQRl2zdTr2abq0CnPNQA8kaIHb3Oqaxqkep4Cen wOwIRieJk2/l8U1BVzFj7ehzp6aOG4xg/+CD1EoDN0zQQE1W7pn2vFbW+wmLSjeuNJma37G/eKd5e 2VhQa/mg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qKUad-007gI1-2k; Sat, 15 Jul 2023 02:00:55 +0000 Received: from mail-yw1-x1149.google.com ([2607:f8b0:4864:20::1149]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qKTY7-007a9f-1l for linux-riscv@lists.infradead.org; Sat, 15 Jul 2023 00:54:18 +0000 Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-57320c10635so20189087b3.3 for ; Fri, 14 Jul 2023 17:54:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689382453; x=1689987253; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=WL/8letflrdUyrlyVQF85H/ANybjC/FZDEF4uZbqq6U=; b=YVDFqRDQFjjSpZgD+yDd0+SvcfnYZvIm68d0fipWbsts27Blri9IZUegY1gTHk9JLn jW4cOIkHI7T+9t0jnXLUxFTuZO17IqR8lJ6cZXaSpbBldzPtgjsDIh8gJKx+Q5X4q5WY ZPeJbtlH0vB2beRgSMZIMEJ9rm99I7jkv+szOwydpHuY8BG/kmiU0z++M/vX2ikqkedk oaLqutULiyyyTrPh+XolZ6Wg+wDDEoirUIkGO2UNG8Fwk+w94SJmA9G1jANboqPpmGQC SLk94TOF3nNcENDMs73y7DqVrLGQulUm5QIb9no511Uazy0Gh8YgK2tpMEaTmnUm1hja FFGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689382453; x=1689987253; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=WL/8letflrdUyrlyVQF85H/ANybjC/FZDEF4uZbqq6U=; b=FCT9ENPaasqdjEUN0qXKsTZQgJhqPbtX9wVpzodbnqQ4LsIsCHfwDVv81PI6zskDH3 7fSxFDGr1DSzFC8jk5Xaa32rYBSC8wOBYE9nFCnB6LW64X8/F7lX55QtYvWmrEsWGyX0 QLMqt5MhKdVNL3+MQUr9EI1qsf0jlJn4n1gQvqDwDuE/YN6lxMLJXqZKtgDBcAuEBkGj jU83Qne8y8Wh2l/wXguJ6Rq3vCuDx+UHgj3gcIQ4ZDE5YAbuQ6o0aVs8tE0QWEbxKEr2 U51Uhcj8qEe1qEYCDr3EjH5In9YzfccnU26UNkAPEO2Hhp6DTqY2X3NaIm1K5bsrP2yX 1efQ== X-Gm-Message-State: ABy/qLZgkVDtkw22YAY3fV8vakSQZHuvBwc6zRPc2/IS510xky6g9gPG Bn+CKecejbzLSjXzTXJ2cErEihIigz5X X-Google-Smtp-Source: APBJJlG6pzqEAFBPPKZpzL5h20iHYi06y5msU9Sl0lkkt3fZ5kUVjrD2r7DxfNyZ6tDmAhZp0/UiGX/oO4d3 X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a81:b302:0:b0:565:a42c:79fe with SMTP id r2-20020a81b302000000b00565a42c79femr46926ywh.1.1689382453561; Fri, 14 Jul 2023 17:54:13 -0700 (PDT) Date: Sat, 15 Jul 2023 00:53:57 +0000 In-Reply-To: <20230715005405.3689586-1-rananta@google.com> Mime-Version: 1.0 References: <20230715005405.3689586-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.455.g037347b96a-goog Message-ID: <20230715005405.3689586-4-rananta@google.com> Subject: [PATCH v6 03/11] KVM: Allow range-based TLB invalidation from common code From: Raghavendra Rao Ananta To: Oliver Upton , Marc Zyngier , James Morse , Suzuki K Poulose Cc: Paolo Bonzini , Sean Christopherson , Huacai Chen , Zenghui Yu , Anup Patel , Atish Patra , Jing Zhang , Colton Lewis , Raghavendra Rao Anata , David Matlack , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Gavin Shan X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230714_175415_607435_BA657EB0 X-CRM114-Status: GOOD ( 13.20 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: David Matlack Make kvm_flush_remote_tlbs_range() visible in common code and create a default implementation that just invalidates the whole TLB. This paves the way for several future features/cleanups: - Introduction of range-based TLBI on ARM. - Eliminating kvm_arch_flush_remote_tlbs_memslot() - Moving the KVM/x86 TDP MMU to common code. No functional change intended. Signed-off-by: David Matlack Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Gavin Shan Reviewed-by: Shaoqin Huang --- arch/x86/include/asm/kvm_host.h | 3 +++ arch/x86/kvm/mmu/mmu.c | 9 ++++----- arch/x86/kvm/mmu/mmu_internal.h | 3 --- include/linux/kvm_host.h | 9 +++++++++ virt/kvm/kvm_main.c | 13 +++++++++++++ 5 files changed, 29 insertions(+), 8 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index a2d3cfc2eb75..08900afbf2ad 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1804,6 +1804,9 @@ static inline int kvm_arch_flush_remote_tlbs(struct kvm *kvm) return -ENOTSUPP; } +#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE +int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, u64 pages); + #define kvm_arch_pmi_in_guest(vcpu) \ ((vcpu) && (vcpu)->arch.handling_intr_from_guest) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index ec169f5c7dce..aaa5e336703a 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -278,16 +278,15 @@ static inline bool kvm_available_flush_remote_tlbs_range(void) return kvm_x86_ops.flush_remote_tlbs_range; } -void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, - gfn_t nr_pages) +int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, u64 pages) { int ret = -EOPNOTSUPP; if (kvm_x86_ops.flush_remote_tlbs_range) ret = static_call(kvm_x86_flush_remote_tlbs_range)(kvm, start_gfn, - nr_pages); - if (ret) - kvm_flush_remote_tlbs(kvm); + pages); + + return ret; } static gfn_t kvm_mmu_page_get_gfn(struct kvm_mmu_page *sp, int index); diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h index d39af5639ce9..86cb83bb3480 100644 --- a/arch/x86/kvm/mmu/mmu_internal.h +++ b/arch/x86/kvm/mmu/mmu_internal.h @@ -170,9 +170,6 @@ bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, struct kvm_memory_slot *slot, u64 gfn, int min_level); -void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, - gfn_t nr_pages); - /* Flush the given page (huge or not) of guest memory. */ static inline void kvm_flush_remote_tlbs_gfn(struct kvm *kvm, gfn_t gfn, int level) { diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index e3f968b38ae9..a731967b24ff 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1359,6 +1359,7 @@ int kvm_vcpu_yield_to(struct kvm_vcpu *target); void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu, bool yield_to_kernel_mode); void kvm_flush_remote_tlbs(struct kvm *kvm); +void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn, u64 pages); #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE int kvm_mmu_topup_memory_cache(struct kvm_mmu_memory_cache *mc, int min); @@ -1486,6 +1487,14 @@ static inline int kvm_arch_flush_remote_tlbs(struct kvm *kvm) } #endif +#ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE +static inline int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, + gfn_t gfn, u64 pages) +{ + return -EOPNOTSUPP; +} +#endif + #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA void kvm_arch_register_noncoherent_dma(struct kvm *kvm); void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index d6b050786155..804470fccac7 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -366,6 +366,19 @@ void kvm_flush_remote_tlbs(struct kvm *kvm) } EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs); +void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn, u64 pages) +{ + if (!kvm_arch_flush_remote_tlbs_range(kvm, gfn, pages)) + return; + + /* + * Fall back to a flushing entire TLBs if the architecture range-based + * TLB invalidation is unsupported or can't be performed for whatever + * reason. + */ + kvm_flush_remote_tlbs(kvm); +} + static void kvm_flush_shadow_all(struct kvm *kvm) { kvm_arch_flush_shadow_all(kvm);