From patchwork Fri Aug 11 04:51:26 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: 13350096 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 88E60EB64DD for ; Fri, 11 Aug 2023 04:52:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233860AbjHKEwc (ORCPT ); Fri, 11 Aug 2023 00:52:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233496AbjHKEwX (ORCPT ); Fri, 11 Aug 2023 00:52:23 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A76B30C1 for ; Thu, 10 Aug 2023 21:51:49 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-d62a7776f69so1628237276.3 for ; Thu, 10 Aug 2023 21:51:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1691729509; x=1692334309; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=ceh3/nJpRP3LCUTMqceYFYfxrY0H2MNGDIBSz6bT86E=; b=lHqWfp61VXzWhun3liSCo1CSCBHiEyU47FTCxsnQq8PbPrZVJoSsWVZ4fEX98C2DkW 5tek7XQP9mJy7NeheveiRehPOgCFv2062IYZFMuFBJd/9R8dr0dmve4e4xKZzUd6v89o VeSHW0hjn2DbsqdsgVscCVTcn0H4yM4N/0YEqjJ196nf8SdcTQtyOZZaVghqfh6h34Re E0oHw2Y6uHdjAkl15YMtMg9Z6P8rco3KWSpUtvl1TY8Fm49+r+1TuIERD17QjTEoKmLD O3fI87xp18xcDlB5HLBTUsrTm5rIbVZpwNSq52s4Abs8Cp3fKn2aFj26qWXruJf9eih2 dIFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691729509; x=1692334309; 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=ceh3/nJpRP3LCUTMqceYFYfxrY0H2MNGDIBSz6bT86E=; b=WITQ6InXrIw4EeON37rBQt0q9y09cRNrG+k9UOV7CxlrwXGZt74VHzJqqX6GKiUK9q eKRFyFZOlwg0AnyWX74mdhHpgBbEMkZVn8cHXY86rHzEFEL6L3Xce4M2YiZQXnPI1GDS ATvdIiCYdzGkz/QlSBohLsgeFTo0qdeObuROkzeoIjUijQsAEfFgySzjpAYHV4RZrdek BktPGOYX8Vh2TzlibsmnD2EkFrZVY74oJzZMKN8bORFcmp+ajGvkZcVoEj4tWHzIr76F 66zdIDUT6SajhIJUGK5uG/Aj13gq0oTAqBa1nLDQfGqslCSaMMv1f2e3uOinPI5dGSGJ r9UQ== X-Gm-Message-State: AOJu0YycIsYfDrG42uBe/SBua9jgotg/ZcaruXqiaFuXiv7yt3GpTwJv wWB6y30+f3kD3qRGiM/uTx1NmWatthu7 X-Google-Smtp-Source: AGHT+IGOJteWPd/cnLBRhVwGynPlFvhmV8TWzRZj/7clA/O6mEkppvIui53pAv4SPGvWg3HXNvX6L5O7yhJy X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a25:d814:0:b0:d48:c04:f256 with SMTP id p20-20020a25d814000000b00d480c04f256mr8024ybg.11.1691729509090; Thu, 10 Aug 2023 21:51:49 -0700 (PDT) Date: Fri, 11 Aug 2023 04:51:26 +0000 In-Reply-To: <20230811045127.3308641-1-rananta@google.com> Mime-Version: 1.0 References: <20230811045127.3308641-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog Message-ID: <20230811045127.3308641-14-rananta@google.com> Subject: [PATCH v9 13/14] 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 , Reiji Watanabe , Colton Lewis , Raghavendra Rao Anata , David Matlack , Fuad Tabba , 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 , Shaoqin Huang 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 5d14d5d5819a1..5ef098af17362 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);