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 X-Spam-Level: X-Spam-Status: No, score=-14.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F33FC43465 for ; Mon, 21 Sep 2020 15:41:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2212720888 for ; Mon, 21 Sep 2020 15:41:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600702898; bh=cD56uCL28utzy8X1gRZgksy9NZmlHrkCFa4SwNHOOqQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ukULS327+hdrpHaJU4sdTMbLWu/l6MGeVPBncHhB8UZ9QRsMS6Lm26Ysd0bQJsfmw ICBf/YaBJUnKanUtBqyRHI31lbKRVl+8n3c5ehKRcOaG5Ak9ucwVWbGlMUki8B7h5J 6mBJfJ4O1KM/7qEnJXki9oLJRvgiL9U6Gim7Gf3c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727397AbgIUPlh (ORCPT ); Mon, 21 Sep 2020 11:41:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:55036 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727231AbgIUPlh (ORCPT ); Mon, 21 Sep 2020 11:41:37 -0400 Received: from e123331-lin.nice.arm.com (lfbn-nic-1-188-42.w2-15.abo.wanadoo.fr [2.15.37.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 88A4620BED; Mon, 21 Sep 2020 15:41:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600702897; bh=cD56uCL28utzy8X1gRZgksy9NZmlHrkCFa4SwNHOOqQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sp1tl5igo7ciag5pmQ9GyBKpwEQK2XfJeH4x+UQgQg11vshTehi2LJ4fsX9VoZaPa hRwlkx0RsZMei5yjDooJc5AWzohmUlYOxLo2xU78W1SwcURN7pBerwce7vYDfYNcMI JAhSbxOrJoWtXAcB3YlZcKcURdaB3qpmuWvxep3Y= From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Cc: linux-efi@vger.kernel.org, Ard Biesheuvel , Zhen Lei , Russell King , Linus Walleij , Nicolas Pitre Subject: [PATCH v2 08/10] ARM: p2v: simplify __fixup_pv_table() Date: Mon, 21 Sep 2020 17:41:15 +0200 Message-Id: <20200921154117.757-9-ardb@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200921154117.757-1-ardb@kernel.org> References: <20200921154117.757-1-ardb@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org Declutter the code in __fixup_pv_table() by using the new adr_l/str_l macros to take PC relative references to external symbols, and by using the value of PHYS_OFFSET passed in r8 to calculate the p2v offset. Signed-off-by: Ard Biesheuvel --- arch/arm/kernel/phys2virt.S | 34 ++++++++------------ 1 file changed, 14 insertions(+), 20 deletions(-) diff --git a/arch/arm/kernel/phys2virt.S b/arch/arm/kernel/phys2virt.S index 8e4be15e1559..be8fb0d89877 100644 --- a/arch/arm/kernel/phys2virt.S +++ b/arch/arm/kernel/phys2virt.S @@ -29,33 +29,27 @@ */ __HEAD ENTRY(__fixup_pv_table) - adr r0, 1f - ldmia r0, {r3-r7} - mvn ip, #0 - subs r3, r0, r3 @ PHYS_OFFSET - PAGE_OFFSET - add r4, r4, r3 @ adjust table start address - add r5, r5, r3 @ adjust table end address - add r6, r6, r3 @ adjust __pv_phys_pfn_offset address - add r7, r7, r3 @ adjust __pv_offset address mov r0, r8, lsr #PAGE_SHIFT @ convert to PFN - str r0, [r6] @ save computed PHYS_OFFSET to __pv_phys_pfn_offset - strcc ip, [r7, #HIGH_OFFSET] @ save to __pv_offset high bits - mov r6, r3, lsr #24 @ constant for add/sub instructions - teq r3, r6, lsl #24 @ must be 16MiB aligned + str_l r0, __pv_phys_pfn_offset, r3 + + adr_l r0, __pv_offset + subs r3, r8, #PAGE_OFFSET @ PHYS_OFFSET - PAGE_OFFSET + mvn ip, #0 + strcc ip, [r0, #HIGH_OFFSET] @ save to __pv_offset high bits + str r3, [r0, #LOW_OFFSET] @ save to __pv_offset low bits + + mov r0, r3, lsr #24 @ constant for add/sub instructions + teq r3, r0, lsl #24 @ must be 16MiB aligned bne 0f - str r3, [r7, #LOW_OFFSET] @ save to __pv_offset low bits + + adr_l r4, __pv_table_begin + adr_l r5, __pv_table_end b __fixup_a_pv_table + 0: mov r0, r0 @ deadloop on error b 0b ENDPROC(__fixup_pv_table) - .align -1: .long . - .long __pv_table_begin - .long __pv_table_end -2: .long __pv_phys_pfn_offset - .long __pv_offset - .text __fixup_a_pv_table: adr_l r6, __pv_offset -- 2.17.1