From nobody Tue Feb 10 20:07:01 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org ARC-Seal: i=1; a=rsa-sha256; t=1619381628; cv=none; d=zohomail.com; s=zohoarc; b=H9ojzjEKPia28pO1yfClzCSWgbn10ljhOLu8Nd7cKWltVaI1AOHHogzEhhZt5mflRCcZFuA9JeH9eLXZ6SoQiroKGWwHAW3u1QyKn88s+LXq3uAdjDv60s4AZIS/dWTcEWGysjNGJSrU2L2MAd4xAuiuabhbslOml69hsFJ1xe8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1619381628; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=LKWf7A+MF6uxi0Yzj4E+EHypbxoopwZaOMfIEc68W2U=; b=fgbTKxjCXeWimvNFrbYd3Xti1UBgbccsm/0HS5bkJwsBjz8q+xFA39pU+11p2PO2MLCG51tqlcMbkNwkj/N2XLCz+QCrNPOvBJag3vzY0qI0Ir+bYpUfLBSHqbkGijkx35RWUjo3+S5NVwv9sjJKXNT/0D8ZgpvGIGx6RlMfAic= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1619381628109588.5313211752217; Sun, 25 Apr 2021 13:13:48 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.117302.223114 (Exim 4.92) (envelope-from ) id 1lal8A-0001S6-8J; Sun, 25 Apr 2021 20:13:26 +0000 Received: by outflank-mailman (output) from mailman id 117302.223114; Sun, 25 Apr 2021 20:13:26 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lal8A-0001Rp-23; Sun, 25 Apr 2021 20:13:26 +0000 Received: by outflank-mailman (input) for mailman id 117302; Sun, 25 Apr 2021 20:13:25 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lal89-0001RJ-KT for xen-devel@lists.xenproject.org; Sun, 25 Apr 2021 20:13:25 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lal89-0000o9-9c; Sun, 25 Apr 2021 20:13:25 +0000 Received: from 54-240-197-235.amazon.com ([54.240.197.235] helo=ufe34d9ed68d054.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lal89-0005m7-0v; Sun, 25 Apr 2021 20:13:25 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=LKWf7A+MF6uxi0Yzj4E+EHypbxoopwZaOMfIEc68W2U=; b=1SDMm0QKKs7ZTmqP/oyO5AZh9 0OPJ6JkxMteNKRWqu9oagsX/IqwziRYQxxOGM+zopceh8gifGisQ16kLw7DSM1BBWXXCHBqUL/WzF PG9/sViCrlB0jH55Aa9+Sr5Vu6QiedEczvB96Tb6NYy7xL2yVOyb9zzQBanYC1wVznCQ4=; From: Julien Grall To: xen-devel@lists.xenproject.org Cc: Wei.Chen@arm.com, Henry.Wang@arm.com, Penny.Zheng@arm.com, Bertrand.Marquis@arm.com, Julien Grall , Stefano Stabellini , Julien Grall , Volodymyr Babchuk Subject: [PATCH RFCv2 02/15] xen/arm: lpae: Use the generic helpers to defined the Xen PT helpers Date: Sun, 25 Apr 2021 21:13:05 +0100 Message-Id: <20210425201318.15447-3-julien@xen.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210425201318.15447-1-julien@xen.org> References: <20210425201318.15447-1-julien@xen.org> X-ZohoMail-DKIM: pass (identity @xen.org) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Julien Grall Currently, Xen PT helpers are only working with 4KB page granularity and open-code the generic helpers. To allow more flexibility, we can re-use the generic helpers and pass Xen's page granularity (PAGE_SHIFT). As Xen PT helpers are used in both C and assembly, we need to move the generic helpers definition outside of the !__ASSEMBLY__ section. Note the aliases for each level are still kept for the time being so we can avoid a massive patch to change all the callers. Signed-off-by: Julien Grall --- Changes in v2: - New patch --- xen/include/asm-arm/lpae.h | 71 +++++++++++++++++++++----------------- 1 file changed, 40 insertions(+), 31 deletions(-) diff --git a/xen/include/asm-arm/lpae.h b/xen/include/asm-arm/lpae.h index 4fb9a40a4ca9..310f5225e056 100644 --- a/xen/include/asm-arm/lpae.h +++ b/xen/include/asm-arm/lpae.h @@ -159,6 +159,17 @@ static inline bool lpae_is_superpage(lpae_t pte, unsig= ned int level) #define lpae_get_mfn(pte) (_mfn((pte).walk.base)) #define lpae_set_mfn(pte, mfn) ((pte).walk.base =3D mfn_x(mfn)) =20 +/* Generate an array @var containing the offset for each level from @addr = */ +#define DECLARE_OFFSETS(var, addr) \ + const unsigned int var[4] =3D { \ + zeroeth_table_offset(addr), \ + first_table_offset(addr), \ + second_table_offset(addr), \ + third_table_offset(addr) \ + } + +#endif /* __ASSEMBLY__ */ + /* * AArch64 supports pages with different sizes (4K, 16K, and 64K). * Provide a set of generic helpers that will compute various @@ -190,17 +201,6 @@ static inline bool lpae_is_superpage(lpae_t pte, unsig= ned int level) #define LPAE_TABLE_INDEX_GS(gs, lvl, addr) \ (((addr) >> LEVEL_SHIFT_GS(gs, lvl)) & LPAE_ENTRY_MASK_GS(gs)) =20 -/* Generate an array @var containing the offset for each level from @addr = */ -#define DECLARE_OFFSETS(var, addr) \ - const unsigned int var[4] =3D { \ - zeroeth_table_offset(addr), \ - first_table_offset(addr), \ - second_table_offset(addr), \ - third_table_offset(addr) \ - } - -#endif /* __ASSEMBLY__ */ - /* * These numbers add up to a 48-bit input address space. * @@ -211,26 +211,35 @@ static inline bool lpae_is_superpage(lpae_t pte, unsi= gned int level) * therefore 39-bits are sufficient. */ =20 -#define LPAE_SHIFT 9 -#define LPAE_ENTRIES (_AC(1,U) << LPAE_SHIFT) -#define LPAE_ENTRY_MASK (LPAE_ENTRIES - 1) - -#define THIRD_SHIFT (PAGE_SHIFT) -#define THIRD_ORDER (THIRD_SHIFT - PAGE_SHIFT) -#define THIRD_SIZE (_AT(paddr_t, 1) << THIRD_SHIFT) -#define THIRD_MASK (~(THIRD_SIZE - 1)) -#define SECOND_SHIFT (THIRD_SHIFT + LPAE_SHIFT) -#define SECOND_ORDER (SECOND_SHIFT - PAGE_SHIFT) -#define SECOND_SIZE (_AT(paddr_t, 1) << SECOND_SHIFT) -#define SECOND_MASK (~(SECOND_SIZE - 1)) -#define FIRST_SHIFT (SECOND_SHIFT + LPAE_SHIFT) -#define FIRST_ORDER (FIRST_SHIFT - PAGE_SHIFT) -#define FIRST_SIZE (_AT(paddr_t, 1) << FIRST_SHIFT) -#define FIRST_MASK (~(FIRST_SIZE - 1)) -#define ZEROETH_SHIFT (FIRST_SHIFT + LPAE_SHIFT) -#define ZEROETH_ORDER (ZEROETH_SHIFT - PAGE_SHIFT) -#define ZEROETH_SIZE (_AT(paddr_t, 1) << ZEROETH_SHIFT) -#define ZEROETH_MASK (~(ZEROETH_SIZE - 1)) +#define LPAE_SHIFT LPAE_SHIFT_GS(PAGE_SHIFT) +#define LPAE_ENTRIES LPAE_ENTRIES_GS(PAGE_SHIFT) +#define LPAE_ENTRY_MASK LPAE_ENTRY_MASK_GS(PAGE_SHIFT) + +#define LEVEL_SHIFT(lvl) LEVEL_SHIFT_GS(PAGE_SHIFT, lvl) +#define LEVEL_ORDER(lvl) LEVEL_ORDER_GS(PAGE_SHIFT, lvl) +#define LEVEL_SIZE(lvl) LEVEL_SIZE_GS(PAGE_SHIFT, lvl) +#define LEVEL_MASK(lvl) (~(LEVEL_SIZE(lvl) - 1)) + +/* Convenience aliases */ +#define THIRD_SHIFT LEVEL_SHIFT(3) +#define THIRD_ORDER LEVEL_ORDER(3) +#define THIRD_SIZE LEVEL_SIZE(3) +#define THIRD_MASK LEVEL_MASK(3) + +#define SECOND_SHIFT LEVEL_SHIFT(2) +#define SECOND_ORDER LEVEL_ORDER(2) +#define SECOND_SIZE LEVEL_SIZE(2) +#define SECOND_MASK LEVEL_MASK(2) + +#define FIRST_SHIFT LEVEL_SHIFT(1) +#define FIRST_ORDER LEVEL_ORDER(1) +#define FIRST_SIZE LEVEL_SIZE(1) +#define FIRST_MASK LEVEL_MASK(1) + +#define ZEROETH_SHIFT LEVEL_SHIFT(0) +#define ZEROETH_ORDER LEVEL_ORDER(0) +#define ZEROETH_SIZE LEVEL_SIZE(0) +#define ZEROETH_MASK LEVEL_MASK(0) =20 /* Calculate the offsets into the pagetables for a given VA */ #define zeroeth_linear_offset(va) ((va) >> ZEROETH_SHIFT) --=20 2.17.1