From patchwork Fri Jun 2 16:09:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vipin Sharma X-Patchwork-Id: 13265588 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 C2CE7C77B7A for ; Fri, 2 Jun 2023 16:10:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236619AbjFBQKw (ORCPT ); Fri, 2 Jun 2023 12:10:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236732AbjFBQKd (ORCPT ); Fri, 2 Jun 2023 12:10:33 -0400 Received: from mail-pl1-x64a.google.com (mail-pl1-x64a.google.com [IPv6:2607:f8b0:4864:20::64a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD62EE67 for ; Fri, 2 Jun 2023 09:09:57 -0700 (PDT) Received: by mail-pl1-x64a.google.com with SMTP id d9443c01a7336-1b04dbcf0dbso22535545ad.1 for ; Fri, 02 Jun 2023 09:09:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1685722181; x=1688314181; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=rivHDhk0ioxMpP1XynwGaSZFsNZDBBbqgVAGbR7E/X8=; b=IxpZG4TkYuPd8UtpcDQplKJDDIpAs6lGKWZe95duADLUk5Xly6SRvjrVvCEGB/Fk1a E9X3IJECzkdQ25Bkjejj4IbXek6JqPY58HRA50EOI/YFTzUpFaA/bzGSlAOm+5PEvo+T 6jKSmBS0KSmdPni70wpBlwTPrvyYGZvMtxSC3Fbri9jwwzePk7OY91lpj01vmu9g7PZn a5J+YN0h1Qu/z/w7ubpNpCMDwcQqYWttGGXgoLeySgwUxIZDyVDmv/3Bk/4OJqAcfD0+ gHcpPqAo0vTPvSXpzWrIqDWuTjrALALhGQwaLZCyItTHvmVctEjS/JfpfTvctKcX+1gM QFLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685722181; x=1688314181; 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=rivHDhk0ioxMpP1XynwGaSZFsNZDBBbqgVAGbR7E/X8=; b=AkJ2NT6XGQAxWPxZLLN6bRp96GFxKU9OeSVonkvpnSKf+8P7OfYy2zvZiUnpkldL4r FJmmC3/FPxEaHzA9id02Wi+wPUTLendOorxfi9MH7M9whhra9GRM8dRyyNTg06XBT0X5 5Cj/AVRExFoFQmd0+2YAEk0Ww3x4855TWYDbbPVFbh8gF5sVqY9dmrowX43FcSmAJNcO a1kvNSBYlSBfE8QJ0tgRO4r/mKXSWDU2SPQ5Lgt1i+7ykMzj73d2DBPFtMo/tbAH8vNz oqLrQabCJ05cF2C07FpvXAAKF39Tp+hHz4EnjQaEEyvUkVhaYQQZEAsUxv97mDPbrGpF eJvQ== X-Gm-Message-State: AC+VfDyy5/3sETjG9gYESMtqDzoVGXWX2pwBBEvKDPyQnlE7J2B2eRk8 RHaHHZcQvU5LDXsINbDmAWsIq+FIjWEX X-Google-Smtp-Source: ACHHUZ4crxpGe15BxcOcaGOZO2WjPbibX9jRmjl7rSrwdD8Z6/aya1uE9CJM9AhjU7HHArKs+z3PEQeSOj8s X-Received: from vipin.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:479f]) (user=vipinsh job=sendgmr) by 2002:a17:902:e3c5:b0:1b1:c90e:b7aa with SMTP id r5-20020a170902e3c500b001b1c90eb7aamr56727ple.4.1685722181662; Fri, 02 Jun 2023 09:09:41 -0700 (PDT) Date: Fri, 2 Jun 2023 09:09:09 -0700 In-Reply-To: <20230602160914.4011728-1-vipinsh@google.com> Mime-Version: 1.0 References: <20230602160914.4011728-1-vipinsh@google.com> X-Mailer: git-send-email 2.41.0.rc0.172.g3f132b7071-goog Message-ID: <20230602160914.4011728-12-vipinsh@google.com> Subject: [PATCH v2 11/16] KVM: arm64: Use KVM_PGTABLE_WALK_SHARED flag instead of KVM_PGTABLE_WALK_HANDLE_FAULT From: Vipin Sharma To: maz@kernel.org, oliver.upton@linux.dev, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, aleksandar.qemu.devel@gmail.com, tsbogend@alpha.franken.de, anup@brainfault.org, atishp@atishpatra.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, seanjc@google.com, pbonzini@redhat.com, dmatlack@google.com, ricarkol@google.com Cc: 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-kselftest@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Vipin Sharma Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Check against shared page table walker flag instead of fault handler flag when determining if walk should continue or not. vCPU page fault handlers uses shared page walker and there are no other shared page walkers in Arm. This will change in future commit when clear-dirty-log will use shared page walker and continue, retry or terminate logic for a walk will change between shared page walkers. Signed-off-by: Vipin Sharma --- arch/arm64/kvm/hyp/pgtable.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index bc8c5c4ac1cf..7f80e953b502 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -191,7 +191,7 @@ static bool kvm_pgtable_walk_continue(const struct kvm_pgtable_walker *walker, * Callbacks can also return ENOENT when PTE which is visited is not * valid. * - * In the context of a fault handler interpret these as a signal + * In the context of a shared walker interpret these as a signal * to retry guest execution. * * Ignore these return codes altogether for walkers outside a fault @@ -199,7 +199,7 @@ static bool kvm_pgtable_walk_continue(const struct kvm_pgtable_walker *walker, * with the page table walk. */ if (r == -EAGAIN || r == -ENOENT) - return !(walker->flags & KVM_PGTABLE_WALK_HANDLE_FAULT); + return !(walker->flags & KVM_PGTABLE_WALK_SHARED); return !r; }