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=-6.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 7A2F9C4724C for ; Wed, 6 May 2020 16:50:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A253208CA for ; Wed, 6 May 2020 16:50:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730741AbgEFQu0 (ORCPT ); Wed, 6 May 2020 12:50:26 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:53309 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730345AbgEFQsc (ORCPT ); Wed, 6 May 2020 12:48:32 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 49HMws4RYtz9v4kJ; Wed, 6 May 2020 18:48:29 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id nXVKFghiAyqD; Wed, 6 May 2020 18:48:29 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 49HMws3hqxz9v4kD; Wed, 6 May 2020 18:48:29 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 5BD168B7C6; Wed, 6 May 2020 18:48:31 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id PJ2Z2TAv4evS; Wed, 6 May 2020 18:48:31 +0200 (CEST) Received: from localhost.localdomain (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 0241B8B7C5; Wed, 6 May 2020 18:48:31 +0200 (CEST) Received: by localhost.localdomain (Postfix, from userid 0) id C497F65911; Wed, 6 May 2020 16:48:30 +0000 (UTC) Message-Id: <371a89670713061c06b47ca9f5170fed89c5d141.1588783498.git.christophe.leroy@csgroup.eu> In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v2 25/45] powerpc/8xx: Prepare handlers for _PAGE_HUGE for 512k pages. To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Wed, 6 May 2020 16:48:30 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Prepare ITLB handler to handle _PAGE_HUGE when CONFIG_HUGETLBFS is enabled. This means that the L1 entry has to be kept in r11 until L2 entry is read, in order to insert _PAGE_HUGE into it. Also move pgd_offset helpers before pte_update() as they will be needed there in next patch. Signed-off-by: Christophe Leroy --- arch/powerpc/include/asm/nohash/32/pgtable.h | 13 ++++++------- arch/powerpc/kernel/head_8xx.S | 15 +++++++++------ 2 files changed, 15 insertions(+), 13 deletions(-) diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h index dd5835354e33..1a86d20b58f3 100644 --- a/arch/powerpc/include/asm/nohash/32/pgtable.h +++ b/arch/powerpc/include/asm/nohash/32/pgtable.h @@ -206,6 +206,12 @@ static inline void pmd_clear(pmd_t *pmdp) } +/* to find an entry in a kernel page-table-directory */ +#define pgd_offset_k(address) pgd_offset(&init_mm, address) + +/* to find an entry in a page-table-directory */ +#define pgd_index(address) ((address) >> PGDIR_SHIFT) +#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) /* * PTE updates. This function is called whenever an existing @@ -348,13 +354,6 @@ static inline int pte_young(pte_t pte) pfn_to_page((__pa(pmd_val(pmd)) >> PAGE_SHIFT)) #endif -/* to find an entry in a kernel page-table-directory */ -#define pgd_offset_k(address) pgd_offset(&init_mm, address) - -/* to find an entry in a page-table-directory */ -#define pgd_index(address) ((address) >> PGDIR_SHIFT) -#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) - /* Find an entry in the third-level page table.. */ #define pte_index(address) \ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 905205c79a25..adad8baadcf5 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -196,7 +196,7 @@ SystemCall: InstructionTLBMiss: mtspr SPRN_SPRG_SCRATCH0, r10 -#if defined(ITLB_MISS_KERNEL) || defined(CONFIG_SWAP) +#if defined(ITLB_MISS_KERNEL) || defined(CONFIG_SWAP) || defined(CONFIG_HUGETLBFS) mtspr SPRN_SPRG_SCRATCH1, r11 #endif @@ -235,16 +235,19 @@ InstructionTLBMiss: rlwinm r10, r10, 0, 20, 31 oris r10, r10, (swapper_pg_dir - PAGE_OFFSET)@ha 3: + mtcr r11 #endif +#ifdef CONFIG_HUGETLBFS + lwz r11, (swapper_pg_dir-PAGE_OFFSET)@l(r10) /* Get level 1 entry */ + mtspr SPRN_MI_TWC, r11 /* Set segment attributes */ + mtspr SPRN_MD_TWC, r11 +#else lwz r10, (swapper_pg_dir-PAGE_OFFSET)@l(r10) /* Get level 1 entry */ mtspr SPRN_MI_TWC, r10 /* Set segment attributes */ - mtspr SPRN_MD_TWC, r10 +#endif mfspr r10, SPRN_MD_TWC lwz r10, 0(r10) /* Get the pte */ -#ifdef ITLB_MISS_KERNEL - mtcr r11 -#endif #ifdef CONFIG_SWAP rlwinm r11, r10, 32-5, _PAGE_PRESENT and r11, r11, r10 @@ -263,7 +266,7 @@ InstructionTLBMiss: /* Restore registers */ 0: mfspr r10, SPRN_SPRG_SCRATCH0 -#if defined(ITLB_MISS_KERNEL) || defined(CONFIG_SWAP) +#if defined(ITLB_MISS_KERNEL) || defined(CONFIG_SWAP) || defined(CONFIG_HUGETLBFS) mfspr r11, SPRN_SPRG_SCRATCH1 #endif rfi -- 2.25.0