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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 117D6D778B0 for ; Fri, 23 Jan 2026 19:16:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=gUvaD/a8anfJZItTYwmyLI/CkuocMV/FORUPB1iCvhM=; b=K4rhTjtpa6HiqaZ6QDmp5gn9o2 m98FKNlGGB58W0GFdWMXhQx47VOBD+F/GsheBm7mR7OHLfjElFyyxa9/wb1PcTwuKrvJzhsUWDuSz jSBw4VJ3Z528rDUU+LKvBYXJCLPmxw/P1BL5ctSeYYzTV/9b8DgO78C8+hUQ2l8VwZG2FPEaIhB5r blwXl8kOuCBUU6DjvFlmTgkIIsIbBQ9eEpuarZOYI/U4D/n4eXjJQxnlxGbb0m6xN+FaE5HzSs9q3 59G5hSMz74dS4zPHRsoN3QRNcqFsKpQ8x5qjE/HXpgfmozcKAckhR0/QVlg8EahRzwzt9Ry9P5oy7 xUJQ3Efw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vjMeD-00000009O14-1c8M; Fri, 23 Jan 2026 19:16:45 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vjMeB-00000009Nzd-2vpW for linux-arm-kernel@lists.infradead.org; Fri, 23 Jan 2026 19:16:44 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 3D6CD43F58; Fri, 23 Jan 2026 19:16:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C401C2BC87; Fri, 23 Jan 2026 19:16:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769195803; bh=rWK31wXn61TDUD7Wh3d8yDUdkv93mnDeLCM+19FrlMk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g3Wlyr8zdvb4Y2xc/QUWy0FbX7bSfuTlvEChqSuOX9pl5QWMMzljoMQ/vzsL/rFf2 /USIm0vKh8X0iauC61PMJx+CCGbl5jA1qGfCsyrXNL/VWUCwY4ILhWuYboPVqdv3Do gvpRgFoYOKojlBxoUgnXES+BVvVK5B+maTDen1KOoOi/Hk47RKVLavUUxH6YLCVDsq TePstyoA7gku2dmiF9oxsuqQlVi2z44fZc5D3lBdnaM3rtw7CR6skM9z59DqgwS1VJ FKE+gobeuKFLZcLVtjbkIoa5KN7+oadOeLkaCds96MlgH6MjYtDIs0EHqK9nT/QDeN J52i0nmG57gjA== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vjMe9-00000005A2V-09CR; Fri, 23 Jan 2026 19:16:41 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Will Deacon , Quentin Perret , Fuad Tabba , Alexandru Elisei Subject: [PATCH v2 2/5] KVM: arm64: Add KVM_PGTABLE_S2_AS_S1 flag Date: Fri, 23 Jan 2026 19:16:34 +0000 Message-ID: <20260123191637.715429-3-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260123191637.715429-1-maz@kernel.org> References: <20260123191637.715429-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com, will@kernel.org, qperret@google.com, tabba@google.com, alexandru.elisei@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260123_111643_778168_BEBBA84A X-CRM114-Status: GOOD ( 12.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Plumb the MT_S2{,_FWB}_AS_S1 memory types into the KVM_S2_MEMATTR() macro with a new KVM_PGTABLE_S2_AS_S1 flag. Nobody selects it yet. Reviewed-by: Joey Gouly Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_pgtable.h | 2 ++ arch/arm64/kvm/hyp/pgtable.c | 14 +++++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h index fc02de43c68dd..9ce51a637da0a 100644 --- a/arch/arm64/include/asm/kvm_pgtable.h +++ b/arch/arm64/include/asm/kvm_pgtable.h @@ -232,10 +232,12 @@ struct kvm_pgtable_mm_ops { * @KVM_PGTABLE_S2_NOFWB: Don't enforce Normal-WB even if the CPUs have * ARM64_HAS_STAGE2_FWB. * @KVM_PGTABLE_S2_IDMAP: Only use identity mappings. + * @KVM_PGTABLE_S2_AS_S1: Final memory attributes are that of Stage-1. */ enum kvm_pgtable_stage2_flags { KVM_PGTABLE_S2_NOFWB = BIT(0), KVM_PGTABLE_S2_IDMAP = BIT(1), + KVM_PGTABLE_S2_AS_S1 = BIT(2), }; /** diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index 947ac1a951a5b..c52a24c15ff28 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -659,7 +659,19 @@ void kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu, } } -#define KVM_S2_MEMATTR(pgt, attr) PAGE_S2_MEMATTR(attr, stage2_has_fwb(pgt)) +#define KVM_S2_MEMATTR(pgt, attr) \ + ({ \ + kvm_pte_t __attr; \ + \ + if ((pgt)->flags & KVM_PGTABLE_S2_AS_S1) \ + __attr = PAGE_S2_MEMATTR(AS_S1, \ + stage2_has_fwb(pgt)); \ + else \ + __attr = PAGE_S2_MEMATTR(attr, \ + stage2_has_fwb(pgt)); \ + \ + __attr; \ + }) static int stage2_set_xn_attr(enum kvm_pgtable_prot prot, kvm_pte_t *attr) { -- 2.47.3