From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A3DF144606C for ; Thu, 16 Jul 2026 18:15:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784225724; cv=none; b=qAM2EI6Kjnijqbt1mXH+RmtFD1WFoWvytGVatEVi/VHja/jQXu6epTASp7DfQwxEms+SgsG/5k1+nlJ/ufonaUNap0fO5rVIJq34mtAQfqrwRNStpB91t1Uluilnv9oOK0PjpKAIbp63u0KsKcfyk4RqXRbqiOiSHN6rf0uzqXw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784225724; c=relaxed/simple; bh=6utOy21KcM4jcYjjQ5iL5Jv1gjyFvDWujTytWlx+NcY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=jzqJiPDavszl0NjoB74e5AKT9G7osyxBkxwC6afjUafvQRQoHvftqGXntzupR8L/j24gGMC6zuGHWV0cf5NBSkzdI7UMv8qMG6Rfsr26sYQXENphts6fcrwwgBMGAZkUjIsNhY1jBdKHaFWuE/UEMc6Ue+7zZY4TBpE85XdAxfI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Z5oGLjGF; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Z5oGLjGF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1784225715; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=26RlGOwVuSPPPr5KjC7HxaW648Zwf/4T1lFh+L2G5ZI=; b=Z5oGLjGFlnclQLyidfWH0Wf54b5OnS4G7zrp+2EWDBQcrnNO+NPefu387bWHpXL/x/zZ6T MgqfoWrNL0xsfNyyQwksi8xUpL95/QuVRtS7yC6e3rHL0xEop67hRPTw88c6WiQXktdy1V qQiNQye5UhcXl88kjLzEpgxrF6kVAqw= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-680-phfHM5JiONWll_ixbyeHhQ-1; Thu, 16 Jul 2026 14:15:12 -0400 X-MC-Unique: phfHM5JiONWll_ixbyeHhQ-1 X-Mimecast-MFC-AGG-ID: phfHM5JiONWll_ixbyeHhQ_1784225711 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7C9B11955E90; Thu, 16 Jul 2026 18:15:11 +0000 (UTC) Received: from virtlab1023.lab.eng.rdu2.redhat.lab.eng.rdu2.redhat.com (virtlab1023.lab.eng.rdu2.redhat.com [10.8.1.187]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 0063E195604E; Thu, 16 Jul 2026 18:15:10 +0000 (UTC) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: nsaenz@amazon.com Subject: [PATCH 20/24] KVM: x86/mmu: Do not prefetch sptes on gfns backed by memory attributes Date: Thu, 16 Jul 2026 14:14:52 -0400 Message-ID: <20260716181456.402786-21-pbonzini@redhat.com> In-Reply-To: <20260716181456.402786-1-pbonzini@redhat.com> References: <20260716181456.402786-1-pbonzini@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 From: Nicolas Saenz Julienne Prefetched SPTEs are always given full access. Do not prefetch GFNs that have memory protections applied. Signed-off-by: Nicolas Saenz Julienne Signed-off-by: Paolo Bonzini --- arch/x86/kvm/mmu/mmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 59c2a04f5648..8e85f672a08d 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -3156,6 +3156,9 @@ static bool kvm_mmu_prefetch_sptes(struct kvm_vcpu *vcpu, gfn_t gfn, u64 *sptep, return false; for (i = 0; i < nr_pages; i++, gfn++, sptep++) { + if (kvm_get_memory_attributes(vcpu->kvm, gfn)) + continue; + mmu_set_spte(vcpu, slot, sptep, access, gfn, page_to_pfn(pages[i]), NULL); -- 2.52.0