From nobody Mon Feb 9 14:31:50 2026 Received: from mail-ej1-f74.google.com (mail-ej1-f74.google.com [209.85.218.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6B750EED8 for ; Thu, 27 Feb 2025 00:33:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740616400; cv=none; b=G4XOoPT1/yaSutTfrKRhAZj936MCkbThdySYz+xsBsG1dyIXYr5bQYIbtMwC0gMtgUm9dc5GXsirSlEob2NjnTPlwedj9BVMofD24ZH4+yBFHLYV4wH/O8MMq7IgpHoF9Cz7xgOcrRAQX8ZQs1BsM4cpDrCVyLDhUK4j5PBzjWc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740616400; c=relaxed/simple; bh=261ZPCgnrvvDXYcolm1gc3HyK99Q/XfdlKS2Gd7awrQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=G6HegHxg6IUIl5TA7MlIbo2/HRZWfXZoGhDU9ryk69gYbvTkUQSnL1drg1ZwvgxwTLEGL7hFjhdtkPZOPgoau3MD95EowrcIBGPPuvnK78+qnO/wAp+zJrLZHxxu+rGMwoD8QwsV7BkcqZubTBEbJ/zcU7XnZ7Yhv6HubgD9BPU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--qperret.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=XsN5ERQX; arc=none smtp.client-ip=209.85.218.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--qperret.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="XsN5ERQX" Received: by mail-ej1-f74.google.com with SMTP id a640c23a62f3a-ab68fbe53a4so34139766b.2 for ; Wed, 26 Feb 2025 16:33:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1740616397; x=1741221197; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=nP/0ASv3gZv6Dq4JFLJ6V0xk++r2sqgnKrNUADZ27XI=; b=XsN5ERQXwm9d8W72NIbybPof42gz4GaMRHviYxZSVjJ0gV+f5YBAMbiQnGHobXGstw 6/tXbwAkJ13lNR4aeQOEQeWsHL7JLYKu2eHZohCJ6MDVHbb3QX/OqyDdwz0MV1zSi2dz aZMSqQB1eeh785JZgSWRrRgwVv+wHUdMW2ECcppYvdcu2CxJtoGuTj1F83cGw49poupp vvSubl1sxotVHHrabIbiUi2aAt6j2wabNvUQj6o8hPk10AY5TrCZx2D1pC6B+6Hi8NAq RIIEGJhfcobvEZ+I7MVi/MZ1NL3wlL2mjNIzFhfNInZ0TINOxkea4PCSExpCM3EkWbM3 MFAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740616397; x=1741221197; 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=nP/0ASv3gZv6Dq4JFLJ6V0xk++r2sqgnKrNUADZ27XI=; b=cw3+lGFZupK3lXIkoeIIRpT1BIqkWRE1x2hPzw4dq88JDGZw84i2OY4FCfBWk1/R0e U1d2TPc6B6bbAtrG+QHc7pefdCkCtXepLi8WETOn8O20GekX0USJ3DflYvfCV6kLA/Mf Sp6cFYId4BbhMWGcEdoxfc1EvT6YW2nPISJnVkUjg/Y8M0qLIuLfPIeC7pZhjfoK77SD aMu5pkK3tPUnKbcWLNJxV1cip41eeopiBi2L9FdD9w77reeGEkpI2IRR3TJiQYNvHgn6 otCclln+u8bRP+C9dkETAn8x4UiZG3pV9D/AOctby4Qbo2oWjCdwIXNC4PTVXyGLrdSq zx1A== X-Forwarded-Encrypted: i=1; AJvYcCVnEDPwtnZ/0LvWnWpFQVZn64eYSot5KWAMxkW8303EQeHg/S/t7nFJ3/ym8SMpuboFQ6qdDu32IoTx91o=@vger.kernel.org X-Gm-Message-State: AOJu0YxUo/aZPEKDTfy0VkqvDOHODcv0/DcjLRKeZVm8ajwuGRTu1Qgs ki5L/l9Z0XvswugJCj2NobHUhvvaghEF4bKw2Qrnb7Pepe/aqq1ZbdvHH7TCJ4H5SM3/p578vIs Y1cPfyA== X-Google-Smtp-Source: AGHT+IG1YIW+GqBALCieMnU4BqI9X9ToFAuUlbxFKvAcEIATQsa5h/n36+QHjYaFBr4TgnPvu4HEXBtbRBDi X-Received: from ejcrr23.prod.google.com ([2002:a17:907:8997:b0:abb:9ace:21a3]) (user=qperret job=prod-delivery.src-stubby-dispatcher) by 2002:a17:907:7841:b0:aa6:5eae:7ece with SMTP id a640c23a62f3a-abed10179f1mr945776366b.43.1740616396839; Wed, 26 Feb 2025 16:33:16 -0800 (PST) Date: Thu, 27 Feb 2025 00:33:06 +0000 In-Reply-To: <20250227003310.367350-1-qperret@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250227003310.367350-1-qperret@google.com> X-Mailer: git-send-email 2.48.1.658.g4767266eb4-goog Message-ID: <20250227003310.367350-3-qperret@google.com> Subject: [PATCH 2/6] KVM: arm64: Use 0b11 for encoding PKVM_NOPAGE From: Quentin Perret To: Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon Cc: Vincent Donnefort , Quentin Perret , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The page ownership state encoded as 0b11 is currently considered reserved for future use, and PKVM_NOPAGE uses bit 2. In order to simplify the relocation of the hyp ownership state into the vmemmap in later patches, let's use the 'reserved' encoding for the PKVM_NOPAGE state. The struct hyp_page layout isn't guaranteed stable at all, so there is no real reason to have 'reserved' encodings. No functional changes intended. Signed-off-by: Quentin Perret --- arch/arm64/kvm/hyp/include/nvhe/memory.h | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/arm64/kvm/hyp/include/nvhe/memory.h b/arch/arm64/kvm/hyp/= include/nvhe/memory.h index 34233d586060..642b5e05fe77 100644 --- a/arch/arm64/kvm/hyp/include/nvhe/memory.h +++ b/arch/arm64/kvm/hyp/include/nvhe/memory.h @@ -13,18 +13,15 @@ * 01: The page is owned by the page-table owner, but is shared * with another entity. * 10: The page is shared with, but not owned by the page-table owner. - * 11: Reserved for future use (lending). */ enum pkvm_page_state { PKVM_PAGE_OWNED =3D 0ULL, PKVM_PAGE_SHARED_OWNED =3D BIT(0), PKVM_PAGE_SHARED_BORROWED =3D BIT(1), - __PKVM_PAGE_RESERVED =3D BIT(0) | BIT(1), =20 /* Meta-states which aren't encoded directly in the PTE's SW bits */ - PKVM_NOPAGE =3D BIT(2), + PKVM_NOPAGE =3D BIT(0) | BIT(1), }; -#define PKVM_PAGE_META_STATES_MASK (~__PKVM_PAGE_RESERVED) =20 #define PKVM_PAGE_STATE_PROT_MASK (KVM_PGTABLE_PROT_SW0 | KVM_PGTABLE_PROT= _SW1) static inline enum kvm_pgtable_prot pkvm_mkstate(enum kvm_pgtable_prot pro= t, --=20 2.48.1.658.g4767266eb4-goog