From nobody Fri Dec 19 20:18:29 2025 Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) (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 33CB615F320 for ; Mon, 27 May 2024 13:31:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=93.17.236.30 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716816668; cv=none; b=hCZkLDtSwRc2IsOF8fJhbBHljIj14HVuK7yp6oLeYL1M512N/wpV035n9SeS7JsosOGnTUD5660gj5J76sDxcz8G65aAlH5E62jn0kOnOQIPO2yeBwd882hbT8EbSxL2737Lgdy0bfFuRozf3XhYsxKp5Sdkd7J4+T1jytm5lJI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716816668; c=relaxed/simple; bh=s4/AO36tt/CSDTJwqMkp0Ne29mDvmColJNi/FwYddUk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JwUrRMCHN1tZ3nz2Jl0uKGW9xNt4v0ZdupugTEoDeLwE5wc5WOOp7Tpnq1X+LtCv6U/vhmZqBV1Ygo+qh3l6asPBShBbdjMk4lw257TnXS440Tu+Os8scwfX1uLeqdpntl0J816fGBjCD5WwGB1hn0/n3jGGBXBLt33dIlYM47U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=csgroup.eu; spf=pass smtp.mailfrom=csgroup.eu; arc=none smtp.client-ip=93.17.236.30 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=csgroup.eu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=csgroup.eu Received: from localhost (mailhub3.si.c-s.fr [192.168.12.233]) by localhost (Postfix) with ESMTP id 4VnxNk4s1Bz9tKB; Mon, 27 May 2024 15:30:46 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bSM3peuOfHHq; Mon, 27 May 2024 15:30:46 +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 4VnxNk3yDZz9tC6; Mon, 27 May 2024 15:30:46 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 831688B773; Mon, 27 May 2024 15:30:46 +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 9bEcQ6VFSJHq; Mon, 27 May 2024 15:30:46 +0200 (CEST) Received: from PO20335.idsi0.si.c-s.fr (unknown [192.168.232.49]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 5FECE8B764; Mon, 27 May 2024 15:30:45 +0200 (CEST) From: Christophe Leroy To: Andrew Morton , Jason Gunthorpe , Peter Xu , Oscar Salvador , Michael Ellerman , Nicholas Piggin Cc: Christophe Leroy , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org Subject: [RFC PATCH v4 11/16] powerpc/e500: Switch to 64 bits PGD on 85xx (32 bits) Date: Mon, 27 May 2024 15:30:09 +0200 Message-ID: X-Mailer: git-send-email 2.44.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1716816601; l=2287; i=christophe.leroy@csgroup.eu; s=20211009; h=from:subject:message-id; bh=s4/AO36tt/CSDTJwqMkp0Ne29mDvmColJNi/FwYddUk=; b=GW/J/ozCeLmomfRdNF2QT5Vp07G4D1/PKFAJswCcFhvfLH1zh8aIVIsEC+pF6j8gRlvl1neqN HCa8Ewi63PoBkmQjaHQFXBKtCtXMuU3uUon/bxcwXwl2N2bXYik3NFj X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" At the time being when CONFIG_PTE_64BIT is selected, PTE entries are 64 bits but PGD entries are still 32 bits. In order to allow leaf PMD entries, switch the PGD to 64 bits entries. Signed-off-by: Christophe Leroy --- arch/powerpc/include/asm/pgtable-types.h | 4 ++++ arch/powerpc/kernel/head_85xx.S | 10 ++++++---- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/include/asm/pgtable-types.h b/arch/powerpc/includ= e/asm/pgtable-types.h index 082c85cc09b1..db965d98e0ae 100644 --- a/arch/powerpc/include/asm/pgtable-types.h +++ b/arch/powerpc/include/asm/pgtable-types.h @@ -49,7 +49,11 @@ static inline unsigned long pud_val(pud_t x) #endif /* CONFIG_PPC64 */ =20 /* PGD level */ +#if defined(CONFIG_PPC_E500) && defined(CONFIG_PTE_64BIT) +typedef struct { unsigned long long pgd; } pgd_t; +#else typedef struct { unsigned long pgd; } pgd_t; +#endif #define __pgd(x) ((pgd_t) { (x) }) static inline unsigned long pgd_val(pgd_t x) { diff --git a/arch/powerpc/kernel/head_85xx.S b/arch/powerpc/kernel/head_85x= x.S index 39724ff5ae1f..a305244afc9f 100644 --- a/arch/powerpc/kernel/head_85xx.S +++ b/arch/powerpc/kernel/head_85xx.S @@ -307,8 +307,9 @@ set_ivor: #ifdef CONFIG_PTE_64BIT #ifdef CONFIG_HUGETLB_PAGE #define FIND_PTE \ - rlwinm r12, r10, 13, 19, 29; /* Compute pgdir/pmd offset */ \ - lwzx r11, r12, r11; /* Get pgd/pmd entry */ \ + rlwinm r12, r10, 14, 18, 28; /* Compute pgdir/pmd offset */ \ + add r12, r11, r12; \ + lwz r11, 4(r12); /* Get pgd/pmd entry */ \ rlwinm. r12, r11, 0, 0, 20; /* Extract pt base address */ \ blt 1000f; /* Normal non-huge page */ \ beq 2f; /* Bail if no table */ \ @@ -321,8 +322,9 @@ set_ivor: 1001: lwz r11, 4(r12); /* Get pte entry */ #else #define FIND_PTE \ - rlwinm r12, r10, 13, 19, 29; /* Compute pgdir/pmd offset */ \ - lwzx r11, r12, r11; /* Get pgd/pmd entry */ \ + rlwinm r12, r10, 14, 18, 28; /* Compute pgdir/pmd offset */ \ + add r12, r11, r12; \ + lwz r11, 4(r12); /* Get pgd/pmd entry */ \ rlwinm. r12, r11, 0, 0, 20; /* Extract pt base address */ \ beq 2f; /* Bail if no table */ \ rlwimi r12, r10, 23, 20, 28; /* Compute pte address */ \ --=20 2.44.0