From patchwork Sat Jul 15 00:54:04 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: 13314271 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 9A761C0015E for ; Sat, 15 Jul 2023 00:54:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231178AbjGOAyo (ORCPT ); Fri, 14 Jul 2023 20:54:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230499AbjGOAyc (ORCPT ); Fri, 14 Jul 2023 20:54:32 -0400 Received: from mail-ot1-x349.google.com (mail-ot1-x349.google.com [IPv6:2607:f8b0:4864:20::349]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81E173ABE for ; Fri, 14 Jul 2023 17:54:22 -0700 (PDT) Received: by mail-ot1-x349.google.com with SMTP id 46e09a7af769-6b87d141149so3928414a34.2 for ; Fri, 14 Jul 2023 17:54:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689382461; x=1689987261; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=lMoefZA3MlfauFX/NYW5KwnK8DnygDi/JN2AwltT7bM=; b=SX3GKM5mrWJriN6mxD7VKeCoEPGOfTdqn9EwSVirR6iKLo+Nl6dOv0quukgzWk7nHV 6SuTwz5hjAZ7RKSmLUVJAnQwmGnCeiKEXzsUeJS6USuq1kdz9DNMt2LL73YEMCwj9WtV /f5/EMib2Mx/MrnCnC8HQBCxs0PSREypg3sn2FU4oZq+NwN8DlcYLayUp8dvvQ/PDvse Tid41Ff1Asl9LR8kElyDqeng1Ti3X11kF3j9m6GGmCa3VeZRfS5fA/IyMr1nNEJGM/hh pYCNhoUPVBY51zoHdVpxLc1drh0sy2xu3hEaoB2qkIdpv/8VbSBobhzqoI+oFtOp0nB8 DM0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689382461; x=1689987261; 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=lMoefZA3MlfauFX/NYW5KwnK8DnygDi/JN2AwltT7bM=; b=LqgJTIT6IakVpuKhbRo1ICzLcMM1/d8xAP8/iV7WivvsVDHVIrHKedEkSxXYMuhX4A g74PLMjpQKQHQYX5+osdVIAAJB4KJ5/4NXsQretPigQNGGE0iviX/vIWp8ORx2cVlA9+ JTZWQ4BjWsWnXKLDbMVZ7kUOYRvDUbTvsXl7tbzhxzotrd4rWqe8eB/dy6zPfsriGkz3 lA1JdNTxIt2LiF6v4LQpIPkxxRXEE8viq0WQ8QSjXR15jxmEc3qo7r7MRtaQfGTEInME W4KF9NxXckbwHRS+NLRWPxpyQgBLlENKKihRWv2WVJjtcecs/gDprigpUO/io4P1qotu L8Ug== X-Gm-Message-State: ABy/qLZntzS4Q19xAD4TM71QII0GGXGnnHTjkp0NoOIw4gzYkPxoepqc neXSKyzuI6IpouToE1305jYZT2ze53gK X-Google-Smtp-Source: APBJJlH5a3wI02XfLCdrjutA0c7lgVeZowupHuccGushVFyo4odptnWudcM/MN2XtoF/0rCDIRcqb128IY2O X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a05:6830:1d6b:b0:6b8:c631:5c5a with SMTP id l11-20020a0568301d6b00b006b8c6315c5amr5318063oti.4.1689382461471; Fri, 14 Jul 2023 17:54:21 -0700 (PDT) Date: Sat, 15 Jul 2023 00:54:04 +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: <20230715005405.3689586-11-rananta@google.com> Subject: [PATCH v6 10/11] KVM: arm64: Invalidate the table entries upon a range 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 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Currently, during the operations such as a hugepage collapse, KVM would flush the entire VM's context using 'vmalls12e1is' TLBI operation. Specifically, if the VM is faulting on many hugepages (say after dirty-logging), it creates a performance penalty for the guest whose pages have already been faulted earlier as they would have to refill their TLBs again. Instead, leverage kvm_tlb_flush_vmid_range() for table entries. If the system supports it, only the required range will be flushed. Else, it'll fallback to the previous mechanism. Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Gavin Shan Reviewed-by: Shaoqin Huang --- arch/arm64/kvm/hyp/pgtable.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index 5d14d5d5819a..5ef098af1736 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -806,7 +806,8 @@ static bool stage2_try_break_pte(const struct kvm_pgtable_visit_ctx *ctx, * evicted pte value (if any). */ if (kvm_pte_table(ctx->old, ctx->level)) - kvm_call_hyp(__kvm_tlb_flush_vmid, mmu); + kvm_tlb_flush_vmid_range(mmu, ctx->addr, + kvm_granule_size(ctx->level)); else if (kvm_pte_valid(ctx->old)) kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ctx->addr, ctx->level);