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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 5C73FC433EF for ; Tue, 29 Mar 2022 16:50:36 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KSbCt6phPz3c8J for ; Wed, 30 Mar 2022 03:50:34 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=bDVd2P4K; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=M4T5grVH; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=redhat.com (client-ip=170.10.129.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=david@redhat.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=bDVd2P4K; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=M4T5grVH; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KSbBl0cJYz3cFJ for ; Wed, 30 Mar 2022 03:49:34 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1648572571; 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=sC+ymRkt7JVDUa+jsWm6tHAksM2n+k+zaIL6QWBa32I=; b=bDVd2P4KK/C8/LaZVehMbBOmblGR3nNe2vd7tLQVp4WqSwVwUM/C0lFfZtve5pP6WzApPC gbBuh/j7DY3dAMj8ICkiymkVeja5LFZkq7A6C4nuseWAKkSf3HZTRHXDiV0d6dn52ZKCBL juhJZgnW+NweKqSBCR09+hOsjU2aUaM= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1648572572; 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=sC+ymRkt7JVDUa+jsWm6tHAksM2n+k+zaIL6QWBa32I=; b=M4T5grVHXRQLIfoQfkgJMKlwEzp/+gu7RVxvUWWq5QShNSAb7AcG3xF6Grcl7aXi4I6ZNF IkMHJzw1+fHVEzPqpTlAExl/qXTgSw569WObk6KipdDn9UIFpIAWGHgOI4YswMcJJA9UiP QesmmbLu9n5GpHrbB9URgkxcjBNAeP8= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-41-roYzQxbCMv-hrUjMfAj--g-1; Tue, 29 Mar 2022 12:49:29 -0400 X-MC-Unique: roYzQxbCMv-hrUjMfAj--g-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5ED81811E9B; Tue, 29 Mar 2022 16:49:27 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.194.134]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3BA641121314; Tue, 29 Mar 2022 16:48:32 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Subject: [PATCH v2 6/8] s390/pgtable: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE Date: Tue, 29 Mar 2022 18:43:27 +0200 Message-Id: <20220329164329.208407-7-david@redhat.com> In-Reply-To: <20220329164329.208407-1-david@redhat.com> References: <20220329164329.208407-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: x86@kernel.org, Jan Kara , David Hildenbrand , Catalin Marinas , Yang Shi , Dave Hansen , Peter Xu , Michal Hocko , linux-mm@kvack.org, Donald Dutile , Liang Zhang , Borislav Petkov , Alexander Gordeev , Will Deacon , Christoph Hellwig , Paul Mackerras , Andrea Arcangeli , linux-s390@vger.kernel.org, Vasily Gorbik , Rik van Riel , Hugh Dickins , Matthew Wilcox , Mike Rapoport , Ingo Molnar , linux-arm-kernel@lists.infradead.org, Jason Gunthorpe , David Rientjes , Gerald Schaefer , Pedro Gomes , Jann Horn , John Hubbard , Heiko Carstens , Shakeel Butt , Thomas Gleixner , Vlastimil Babka , Oded Gabbay , linuxppc-dev@lists.ozlabs.org, Oleg Nesterov , Nadav Amit , Andrew Morton , Linus Torvalds , Roman Gushchin , "Kirill A . Shutemov" , Mike Kravetz Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Let's use bit 52, which is unused. Signed-off-by: David Hildenbrand --- arch/s390/include/asm/pgtable.h | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 3982575bb586..a397b072a580 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -181,6 +181,8 @@ static inline int is_module_addr(void *addr) #define _PAGE_SOFT_DIRTY 0x000 #endif +#define _PAGE_SWP_EXCLUSIVE _PAGE_LARGE /* SW pte exclusive swap bit */ + /* Set of bits not changed in pte_modify */ #define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_SPECIAL | _PAGE_DIRTY | \ _PAGE_YOUNG | _PAGE_SOFT_DIRTY) @@ -826,6 +828,22 @@ static inline int pmd_protnone(pmd_t pmd) } #endif +#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE +static inline int pte_swp_exclusive(pte_t pte) +{ + return pte_val(pte) & _PAGE_SWP_EXCLUSIVE; +} + +static inline pte_t pte_swp_mkexclusive(pte_t pte) +{ + return set_pte_bit(pte, __pgprot(_PAGE_SWP_EXCLUSIVE)); +} + +static inline pte_t pte_swp_clear_exclusive(pte_t pte) +{ + return clear_pte_bit(pte, __pgprot(_PAGE_SWP_EXCLUSIVE)); +} + static inline int pte_soft_dirty(pte_t pte) { return pte_val(pte) & _PAGE_SOFT_DIRTY; @@ -1715,14 +1733,15 @@ static inline int has_transparent_hugepage(void) * Bits 54 and 63 are used to indicate the page type. Bit 53 marks the pte * as invalid. * A swap pte is indicated by bit pattern (pte & 0x201) == 0x200 - * | offset |X11XX|type |S0| + * | offset |E11XX|type |S0| * |0000000000111111111122222222223333333333444444444455|55555|55566|66| * |0123456789012345678901234567890123456789012345678901|23456|78901|23| * * Bits 0-51 store the offset. + * Bit 52 (E) is used to remember PG_anon_exclusive. * Bits 57-61 store the type. * Bit 62 (S) is used for softdirty tracking. - * Bits 52, 55 and 56 (X) are unused. + * Bits 55 and 56 (X) are unused. */ #define __SWP_OFFSET_MASK ((1UL << 52) - 1) -- 2.35.1