From patchwork Thu Apr 4 16:36:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 13618067 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 C37D112FF71 for ; Thu, 4 Apr 2024 16:37:30 +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=1712248654; cv=none; b=t3uS7em5VNQKRszw+407C8M8fsLxWxnfBgctEDy4U/jLUCC9wnOSL6swajOxD5/OyHD5EkjzdWwklM2huAPXVvBOLxXSQFnTRNTJke55TqhlAlCbATWIY2F4sOtATmSv1QlabuKrewVhMp/qs/mU+38Q28Sqo47U0KHszHl+Vj0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712248654; c=relaxed/simple; bh=aCPNbBl5JKNxYSnh7bsg4bMZsFTro2yxg6Wzh277+Fs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rgQSLMOEmobL3fsShHiXQg7/BDPo9PcEsXLbK4+XNTox2DSpBFB3t1z04qku+tuDdxvkr3gblmu6pqzb39MCom29CvPXxdlaF3XChuOzfp/sFq25t716yP3E2pyYCACEZ74W+vjKhbOAscNMVJcvXRulUO4eIlR6j8vRxco/AKE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none 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=UGhd8cqG; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none 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="UGhd8cqG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1712248650; 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=wn9vbDVG4YtRegf5ZBlenhUihh95CLw8Qi8j4juWPxs=; b=UGhd8cqGvYkjl+9cUHy/iDcIRMaf9+ly1C8qU8LH9Z05MUWB+HI92Frzks38xFjmQvT01j O3KIjnr9w8qV6G7Pae9ieGtlc1SWoBspPXxH+9Xx87h/LzYh5mu61wlCWZ/NrHuX6tH9au 9kDitPKIGgWdTZxNBA/MIqD/fEoUJFE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-546-ZB9ewTULNjmhHBCUXGQC7Q-1; Thu, 04 Apr 2024 12:37:26 -0400 X-MC-Unique: ZB9ewTULNjmhHBCUXGQC7Q-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9D4C688D01A; Thu, 4 Apr 2024 16:37:25 +0000 (UTC) Received: from t14s.fritz.box (unknown [10.39.192.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1ADD23C54; Thu, 4 Apr 2024 16:37:21 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, David Hildenbrand , Matthew Wilcox , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Janosch Frank , Claudio Imbrenda , Gerald Schaefer , Thomas Huth Subject: [PATCH v1 4/5] s390/uv: update PG_arch_1 comment Date: Thu, 4 Apr 2024 18:36:41 +0200 Message-ID: <20240404163642.1125529-5-david@redhat.com> In-Reply-To: <20240404163642.1125529-1-david@redhat.com> References: <20240404163642.1125529-1-david@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.1 We removed the usage of PG_arch_1 for page tables in commit a51324c430db ("s390/cmma: rework no-dat handling"). Let's update the comment in UV to reflect that. Signed-off-by: David Hildenbrand Reviewed-by: Claudio Imbrenda --- arch/s390/kernel/uv.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index 9c0113b26735..76fc61333fae 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -471,13 +471,12 @@ int arch_make_page_accessible(struct page *page) return 0; /* - * PG_arch_1 is used in 3 places: - * 1. for kernel page tables during early boot - * 2. for storage keys of huge pages and KVM - * 3. As an indication that this small folio might be secure. This can + * PG_arch_1 is used in 2 places: + * 1. for storage keys of hugetlb folios and KVM + * 2. As an indication that this small folio might be secure. This can * overindicate, e.g. we set the bit before calling * convert_to_secure. - * As secure pages are never huge, all 3 variants can co-exists. + * As secure pages are never large folios, both variants can co-exists. */ if (!test_bit(PG_arch_1, &folio->flags)) return 0;