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 4D6ACFA3743 for ; Thu, 27 Oct 2022 22:23:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235405AbiJ0WXp (ORCPT ); Thu, 27 Oct 2022 18:23:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40928 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235404AbiJ0WXn (ORCPT ); Thu, 27 Oct 2022 18:23:43 -0400 Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67347A23E8 for ; Thu, 27 Oct 2022 15:23:43 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1666909422; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6/INBoJIrWD1fTlLMrgpkisXK+cYYTD0nB+IU7Yqcwo=; b=c7Pk/QPIzo2WNEr/uGsdXwLSfoLveKQJ2rYJ3OqsdUBNOfw3t85I9HISfCwHhUuaI8aULF YGtef+KtplozjDLh/wHjM50g4yU8Xib+y92A3kIrzrMxS7NLA41CM+Tv+NWEtwO/wh8ayW 9E5/4VEElglHNl4oaOYEzPh5vrHwa3Q= From: Oliver Upton To: Marc Zyngier , James Morse , Alexandru Elisei Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Reiji Watanabe , Ricardo Koller , David Matlack , Quentin Perret , Ben Gardon , Gavin Shan , Peter Xu , Will Deacon , Sean Christopherson , kvmarm@lists.linux.dev, Oliver Upton Subject: [PATCH v3 14/15] KVM: arm64: Make table->block changes parallel-aware Date: Thu, 27 Oct 2022 22:23:32 +0000 Message-Id: <20221027222332.1685156-1-oliver.upton@linux.dev> In-Reply-To: <20221027221752.1683510-1-oliver.upton@linux.dev> References: <20221027221752.1683510-1-oliver.upton@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org stage2_map_walk_leaf() and friends now handle stage-2 PTEs generically, and perform the correct flush when a table PTE is removed. Additionally, they've been made parallel-aware, using an atomic break to take ownership of the PTE. Stop clearing the PTE in the pre-order callback and instead let stage2_map_walk_leaf() deal with it. Signed-off-by: Oliver Upton --- arch/arm64/kvm/hyp/pgtable.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index 581ba688c6f7..d08e14008bfb 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -841,21 +841,12 @@ static int stage2_map_walk_table_pre(const struct kvm_pgtable_visit_ctx *ctx, if (!stage2_leaf_mapping_allowed(ctx, data)) return 0; - kvm_clear_pte(ctx->ptep); - - /* - * Invalidate the whole stage-2, as we may have numerous leaf - * entries below us which would otherwise need invalidating - * individually. - */ - kvm_call_hyp(__kvm_tlb_flush_vmid, data->mmu); - ret = stage2_map_walker_try_leaf(ctx, data); + if (ret) + return ret; - mm_ops->put_page(ctx->ptep); mm_ops->free_removed_table(childp, ctx->level + 1); - - return ret; + return 0; } static int stage2_map_walk_leaf(const struct kvm_pgtable_visit_ctx *ctx, -- 2.38.1.273.g43a17bfeac-goog