From nobody Tue Dec 16 11:31:24 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 BCD001CAA9 for ; Sun, 26 May 2024 09:23:32 +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=1716715414; cv=none; b=jxVR9x1yJcseoHrNBm5zS5TwAl3StV6mJVPu4lZ76wg+mV5lfdFmR4/vQ5/End51sAAOniauG/d1mWbR2/028MX0TIUHfrPUgzlYVww2xE9P40SwwtEy0dXKGLQFUop+5ND3KGfYmA9sS2dYX5AAZln+YwrrKedf2xLZA8xE8zw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716715414; c=relaxed/simple; bh=PtgaqC65fQs5olNCgwTc/2lsh+SjpBUwpJrqL72cGpo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hhz1HiwP8G9MmlQcqQgKt2ykxJo3DdmfCpUoXacjNYk6mpUmD7/sYGM2ccd1TGKGB/+OC0GZOv7c+WbXpbWP4k7Fdv7Z4v7MI3dd3tjIa4EwZPjcXdUTfkDsm3aKfCXSnwFiQHUBu5Ddaph4ugGWXiTnkMLFaqEnJIGRyesiAJg= 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 4VnCww1GlNz9tMS; Sun, 26 May 2024 11:22:40 +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 YXL8zZbQGbd5; Sun, 26 May 2024 11:22:40 +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 4VnCwq0W0Pz9tKB; Sun, 26 May 2024 11:22:35 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 0C9908B774; Sun, 26 May 2024 11:22:35 +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 QY0C7TY-etEs; Sun, 26 May 2024 11:22:34 +0200 (CEST) Received: from PO20335.idsi0.si.c-s.fr (unknown [192.168.233.45]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 67A9F8B773; Sun, 26 May 2024 11:22:34 +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 v3 13/16] powerpc/e500: Use contiguous PMD instead of hugepd Date: Sun, 26 May 2024 11:22:33 +0200 Message-ID: <804c17e507769dc92f35775ba6d47348f83ae3f4.1716714720.git.christophe.leroy@csgroup.eu> 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=1716715344; l=15695; i=christophe.leroy@csgroup.eu; s=20211009; h=from:subject:message-id; bh=PtgaqC65fQs5olNCgwTc/2lsh+SjpBUwpJrqL72cGpo=; b=tEbuaQYXXgzr3ZHpJaC97Zvq9AW+rfg0w3zOfwauHJkNHkjGD+KRjMOA9mZ7oEwkwURJD60E3 dzjEpSASV12CPf2wQ87LzP9eP18XzyLCiD6itPOI49e+s8q7JU+4co4 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" e500 supports many page sizes among which the following size are implemented in the kernel at the time being: 4M, 16M, 64M, 256M, 1G. On e500, TLB miss for hugepages is exclusively handled by SW even on e6500 which has HW assistance for 4k pages, so there are no constraints like on the 8xx. On e500/32, all are at PGD/PMD level and can be handled as cont-PMD. On e500/64, smaller ones are on PMD while bigger ones are on PUD. Again, they can easily be handled as cont-PMD and cont-PUD instead of hugepd. Signed-off-by: Christophe Leroy --- v3: Add missing pmd_leaf_size() and pud_leaf_size() --- .../powerpc/include/asm/nohash/hugetlb-e500.h | 32 +--------- arch/powerpc/include/asm/nohash/pgalloc.h | 2 - arch/powerpc/include/asm/nohash/pgtable.h | 43 +++++++++---- arch/powerpc/include/asm/nohash/pte-e500.h | 28 +++++++++ arch/powerpc/include/asm/page.h | 15 +---- arch/powerpc/kernel/head_85xx.S | 23 +++---- arch/powerpc/mm/hugetlbpage.c | 2 - arch/powerpc/mm/nohash/tlb_low_64e.S | 63 +++++++++++-------- arch/powerpc/mm/pgtable.c | 31 +++++++++ arch/powerpc/platforms/Kconfig.cputype | 1 - 10 files changed, 144 insertions(+), 96 deletions(-) diff --git a/arch/powerpc/include/asm/nohash/hugetlb-e500.h b/arch/powerpc/= include/asm/nohash/hugetlb-e500.h index d8e51a3f8557..d30e2a3f129d 100644 --- a/arch/powerpc/include/asm/nohash/hugetlb-e500.h +++ b/arch/powerpc/include/asm/nohash/hugetlb-e500.h @@ -2,38 +2,12 @@ #ifndef _ASM_POWERPC_NOHASH_HUGETLB_E500_H #define _ASM_POWERPC_NOHASH_HUGETLB_E500_H =20 -static inline pte_t *hugepd_page(hugepd_t hpd) -{ - if (WARN_ON(!hugepd_ok(hpd))) - return NULL; - - return (pte_t *)((hpd_val(hpd) & ~HUGEPD_SHIFT_MASK) | PD_HUGE); -} - -static inline unsigned int hugepd_shift(hugepd_t hpd) -{ - return hpd_val(hpd) & HUGEPD_SHIFT_MASK; -} - -static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr, - unsigned int pdshift) -{ - /* - * On FSL BookE, we have multiple higher-level table entries that - * point to the same hugepte. Just use the first one since they're all - * identical. So for that case, idx=3D0. - */ - return hugepd_page(hpd); -} +#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT +void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, + pte_t pte, unsigned long sz); =20 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); =20 -static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned in= t pshift) -{ - /* We use the old format for PPC_E500 */ - *hpdp =3D __hugepd(((unsigned long)new & ~PD_HUGE) | pshift); -} - static inline int check_and_get_huge_psize(int shift) { if (shift & 1) /* Not a power of 4 */ diff --git a/arch/powerpc/include/asm/nohash/pgalloc.h b/arch/powerpc/inclu= de/asm/nohash/pgalloc.h index 4b62376318e1..d06efac6d7aa 100644 --- a/arch/powerpc/include/asm/nohash/pgalloc.h +++ b/arch/powerpc/include/asm/nohash/pgalloc.h @@ -44,8 +44,6 @@ static inline void pgtable_free(void *table, int shift) } } =20 -#define get_hugepd_cache_index(x) (x) - static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, i= nt shift) { unsigned long pgf =3D (unsigned long)table; diff --git a/arch/powerpc/include/asm/nohash/pgtable.h b/arch/powerpc/inclu= de/asm/nohash/pgtable.h index c4be7754e96f..28ecb2c8b433 100644 --- a/arch/powerpc/include/asm/nohash/pgtable.h +++ b/arch/powerpc/include/asm/nohash/pgtable.h @@ -52,11 +52,36 @@ static inline pte_basic_t pte_update(struct mm_struct *= mm, unsigned long addr, p { pte_basic_t old =3D pte_val(*p); pte_basic_t new =3D (old & ~(pte_basic_t)clr) | set; + unsigned long sz; + unsigned long pdsize; + int i; =20 if (new =3D=3D old) return old; =20 - *p =3D __pte(new); +#ifdef CONFIG_PPC_E500 + if (huge) + sz =3D 1UL << (((old & _PAGE_HSIZE_MSK) >> _PAGE_HSIZE_SHIFT) + 20); + else +#endif + sz =3D PAGE_SIZE; + + if (!huge || sz < PMD_SIZE) + pdsize =3D PAGE_SIZE; + else if (sz < PUD_SIZE) + pdsize =3D PMD_SIZE; + else if (sz < P4D_SIZE) + pdsize =3D PUD_SIZE; + else if (sz < PGDIR_SIZE) + pdsize =3D P4D_SIZE; + else + pdsize =3D PGDIR_SIZE; + + for (i =3D 0; i < sz / pdsize; i++, p++) { + *p =3D __pte(new); + if (new) + new +=3D (unsigned long long)(pdsize / PAGE_SIZE) << PTE_RPN_SHIFT; + } =20 if (IS_ENABLED(CONFIG_44x) && !is_kernel_addr(addr) && (old & _PAGE_EXEC)) icache_44x_need_flush =3D 1; @@ -340,25 +365,19 @@ static inline void __set_pte_at(struct mm_struct *mm,= unsigned long addr, =20 #define pgprot_writecombine pgprot_noncached_wc =20 -#ifdef CONFIG_ARCH_HAS_HUGEPD -static inline int hugepd_ok(hugepd_t hpd) -{ - /* We clear the top bit to indicate hugepd */ - return (hpd_val(hpd) && (hpd_val(hpd) & PD_HUGE) =3D=3D 0); -} - -#define is_hugepd(hpd) (hugepd_ok(hpd)) -#endif - #ifdef CONFIG_HUGETLB_PAGE static inline int pmd_huge(pmd_t pmd) { +#ifdef pmd_leaf + return pmd_leaf(pmd); +#else return 0; +#endif } =20 static inline int pud_huge(pud_t pud) { - return 0; + return pud_leaf(pud); } #endif =20 diff --git a/arch/powerpc/include/asm/nohash/pte-e500.h b/arch/powerpc/incl= ude/asm/nohash/pte-e500.h index 091e4bff1fba..86e0cd5fcbb4 100644 --- a/arch/powerpc/include/asm/nohash/pte-e500.h +++ b/arch/powerpc/include/asm/nohash/pte-e500.h @@ -67,6 +67,7 @@ #define _PAGE_RWX (_PAGE_READ | _PAGE_WRITE | _PAGE_BAP_UX) =20 #define _PAGE_SPECIAL _PAGE_SW0 +#define _PAGE_PTE _PAGE_PSIZE_4K =20 #define PTE_RPN_SHIFT (24) =20 @@ -106,6 +107,33 @@ static inline pte_t pte_mkexec(pte_t pte) } #define pte_mkexec pte_mkexec =20 +static inline int pmd_leaf(pmd_t pmd) +{ + return pmd_val(pmd) & _PAGE_PTE; +} +#define pmd_leaf pmd_leaf + +static inline unsigned long pmd_leaf_size(pmd_t pmd) +{ + return 1UL << (((pmd_val(pmd) & _PAGE_HSIZE_MSK) >> _PAGE_HSIZE_SHIFT) + = 20); +} +#define pmd_leaf_size pmd_leaf_size + +#ifdef CONFIG_PPC64 +static inline int pud_leaf(pud_t pud) +{ + return pud_val(pud) & _PAGE_PTE; +} +#define pud_leaf pud_leaf + +static inline unsigned long pud_leaf_size(pud_t pud) +{ + return 1UL << (((pud_val(pud) & _PAGE_HSIZE_MSK) >> _PAGE_HSIZE_SHIFT) + = 20); +} +#define pud_leaf_size pud_leaf_size + +#endif + #endif /* __ASSEMBLY__ */ =20 #endif /* __KERNEL__ */ diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/pag= e.h index 018c3d55232c..7d3c3bc40e6a 100644 --- a/arch/powerpc/include/asm/page.h +++ b/arch/powerpc/include/asm/page.h @@ -269,20 +269,7 @@ static inline const void *pfn_to_kaddr(unsigned long p= fn) #define is_kernel_addr(x) ((x) >=3D TASK_SIZE) #endif =20 -#ifndef CONFIG_PPC_BOOK3S_64 -/* - * Use the top bit of the higher-level page table entries to indicate whet= her - * the entries we point to contain hugepages. This works because we know = that - * the page tables live in kernel space. If we ever decide to support hav= ing - * page tables at arbitrary addresses, this breaks and will have to change. - */ -#ifdef CONFIG_PPC64 -#define PD_HUGE 0x8000000000000000UL -#else -#define PD_HUGE 0x80000000 -#endif - -#else /* CONFIG_PPC_BOOK3S_64 */ +#ifdef CONFIG_PPC_BOOK3S_64 /* * Book3S 64 stores real addresses in the hugepd entries to * avoid overlaps with _PAGE_PRESENT and _PAGE_PTE. diff --git a/arch/powerpc/kernel/head_85xx.S b/arch/powerpc/kernel/head_85x= x.S index a305244afc9f..96479a2230ac 100644 --- a/arch/powerpc/kernel/head_85xx.S +++ b/arch/powerpc/kernel/head_85xx.S @@ -310,16 +310,17 @@ set_ivor: 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 */ \ - oris r11, r11, PD_HUGE@h; /* Put back address bit */ \ - andi. r10, r11, HUGEPD_SHIFT_MASK@l; /* extract size field */ \ - xor r12, r10, r11; /* drop size bits from pointer */ \ + rotlwi. r11, r11, 22; /* Leaf entry (_PAGE_PTE set) */\ + bge 1000f; /* Normal non-huge page */ \ + rlwinm r10, r11, 64 - _PAGE_HSIZE_SHIFT - 22, 0xf; \ + rotrwi r11, r11, 22; /* Restore entry */ \ b 1001f; \ -1000: rlwimi r12, r10, 23, 20, 28; /* Compute pte address */ \ +1000: rlwinm. r12, r11, 32 - 22, 0, 20; /* Extract pt base address */ \ + beq 2f; /* Bail if no table */ \ + rlwimi r12, r10, 23, 20, 28; /* Compute pte address */ \ li r10, 0; /* clear r10 */ \ -1001: lwz r11, 4(r12); /* Get pte entry */ + lwz r11, 4(r12); /* Get pte entry */ \ +1001: #else #define FIND_PTE \ rlwinm r12, r10, 14, 18, 28; /* Compute pgdir/pmd offset */ \ @@ -749,16 +750,16 @@ finish_tlb_load: 100: stw r15, 0(r17) =20 /* - * Calc MAS1_TSIZE from r10 (which has pshift encoded) + * Calc MAS1_TSIZE from r10 (which has pshift - 20 encoded) * tlb_enc =3D (pshift - 10). */ - subi r15, r10, 10 + addi r15, r10, 10 mfspr r16, SPRN_MAS1 rlwimi r16, r15, 7, 20, 24 mtspr SPRN_MAS1, r16 =20 /* copy the pshift for use later */ - mr r14, r10 + addi r14, r10, 20 =20 /* fall through */ =20 diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 5193f6845725..ca00dbfe0e50 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -626,8 +626,6 @@ static int __init hugetlbpage_init(void) if (pdshift > shift) { if (!IS_ENABLED(CONFIG_PPC_8xx)) pgtable_cache_add(pdshift - shift); - } else if (IS_ENABLED(CONFIG_PPC_E500)) { - pgtable_cache_add(PTE_T_ORDER); } =20 configured =3D true; diff --git a/arch/powerpc/mm/nohash/tlb_low_64e.S b/arch/powerpc/mm/nohash/= tlb_low_64e.S index a54e7d6c3d0b..5f6154befde3 100644 --- a/arch/powerpc/mm/nohash/tlb_low_64e.S +++ b/arch/powerpc/mm/nohash/tlb_low_64e.S @@ -152,20 +152,26 @@ tlb_miss_common_bolted: =20 rldicl r15,r16,64-PUD_SHIFT+3,64-PUD_INDEX_SIZE-3 clrrdi r15,r15,3 - cmpdi cr0,r14,0 - bge tlb_miss_fault_bolted /* Bad pgd entry or hugepage; bail */ + cmpdi cr3,r14,0 + andi. r10,r14,_PAGE_PTE + beq- cr3,tlb_miss_fault_bolted /* No entry, bail */ + bne tlb_miss_fault_bolted /* Hugepage; bail */ ldx r14,r14,r15 /* grab pud entry */ =20 rldicl r15,r16,64-PMD_SHIFT+3,64-PMD_INDEX_SIZE-3 clrrdi r15,r15,3 - cmpdi cr0,r14,0 - bge tlb_miss_fault_bolted + cmpdi cr3,r14,0 + andi. r10,r14,_PAGE_PTE + beq- cr3,tlb_miss_fault_bolted /* No entry, bail */ + bne tlb_miss_fault_bolted /* Hugepage; bail */ ldx r14,r14,r15 /* Grab pmd entry */ =20 rldicl r15,r16,64-PAGE_SHIFT+3,64-PTE_INDEX_SIZE-3 clrrdi r15,r15,3 - cmpdi cr0,r14,0 - bge tlb_miss_fault_bolted + cmpdi cr3,r14,0 + andi. r10,r14,_PAGE_PTE + beq- cr3,tlb_miss_fault_bolted /* No entry, bail */ + bne tlb_miss_fault_bolted /* Hugepage; bail */ ldx r14,r14,r15 /* Grab PTE, normal (!huge) page */ =20 /* Check if required permissions are met */ @@ -390,19 +396,25 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_SMT) =20 rldicl r15,r16,64-PUD_SHIFT+3,64-PUD_INDEX_SIZE-3 clrrdi r15,r15,3 - cmpdi cr0,r14,0 - bge tlb_miss_huge_e6500 /* Bad pgd entry or hugepage; bail */ + cmpdi cr3,r14,0 + andi. r10,r14,_PAGE_PTE + beq- cr3,tlb_miss_fault_e6500 /* No entry, bail */ + bne tlb_miss_huge_e6500 /* Hugepage; bail */ ldx r14,r14,r15 /* grab pud entry */ =20 rldicl r15,r16,64-PMD_SHIFT+3,64-PMD_INDEX_SIZE-3 clrrdi r15,r15,3 - cmpdi cr0,r14,0 - bge tlb_miss_huge_e6500 + cmpdi cr3,r14,0 + andi. r10,r14,_PAGE_PTE + beq- cr3,tlb_miss_fault_e6500 /* No entry, bail */ + bne tlb_miss_huge_e6500 /* Hugepage; bail */ ldx r14,r14,r15 /* Grab pmd entry */ =20 mfspr r10,SPRN_MAS0 - cmpdi cr0,r14,0 - bge tlb_miss_huge_e6500 + cmpdi cr3,r14,0 + andi. r15,r14,_PAGE_PTE + beq- cr3,tlb_miss_fault_e6500 /* No entry, bail */ + bne tlb_miss_huge_e6500 /* Hugepage; bail */ =20 /* Now we build the MAS for a 2M indirect page: * @@ -449,12 +461,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_SMT) rfi =20 tlb_miss_huge_e6500: - beq tlb_miss_fault_e6500 - li r10,1 - andi. r15,r14,HUGEPD_SHIFT_MASK@l /* r15 =3D psize */ - rldimi r14,r10,63,0 /* Set PD_HUGE */ - xor r14,r14,r15 /* Clear size bits */ - ldx r14,0,r14 + rlwinm r15,r14,32-_PAGE_HSIZE_SHIFT,0xf =20 /* * Now we build the MAS for a huge page. @@ -465,7 +472,7 @@ tlb_miss_huge_e6500: * MAS 2,3+7: Needs to be redone similar to non-tablewalk handler */ =20 - subi r15,r15,10 /* Convert psize to tsize */ + addi r15,r15,10 /* Convert hsize to tsize */ mfspr r10,SPRN_MAS1 rlwinm r10,r10,0,~MAS1_IND rlwimi r10,r15,MAS1_TSIZE_SHIFT,MAS1_TSIZE_MASK @@ -579,22 +586,28 @@ virt_page_table_tlb_miss: rldicl r11,r16,64-VPTE_PGD_SHIFT,64-PGD_INDEX_SIZE-3 clrrdi r10,r11,3 ldx r15,r10,r15 - cmpdi cr0,r15,0 - bge virt_page_table_tlb_miss_fault + cmpdi cr3,r15,0 + andi. r10,r15,_PAGE_PTE + beq- cr3,virt_page_table_tlb_miss_fault /* No entry, bail */ + bne virt_page_table_tlb_miss_fault /* Hugepage; bail */ =20 /* Get to PUD entry */ rldicl r11,r16,64-VPTE_PUD_SHIFT,64-PUD_INDEX_SIZE-3 clrrdi r10,r11,3 ldx r15,r10,r15 - cmpdi cr0,r15,0 - bge virt_page_table_tlb_miss_fault + cmpdi cr3,r15,0 + andi. r10,r15,_PAGE_PTE + beq- cr3,virt_page_table_tlb_miss_fault /* No entry, bail */ + bne virt_page_table_tlb_miss_fault /* Hugepage; bail */ =20 /* Get to PMD entry */ rldicl r11,r16,64-VPTE_PMD_SHIFT,64-PMD_INDEX_SIZE-3 clrrdi r10,r11,3 ldx r15,r10,r15 - cmpdi cr0,r15,0 - bge virt_page_table_tlb_miss_fault + cmpdi cr3,r15,0 + andi. r10,r15,_PAGE_PTE + beq- cr3,virt_page_table_tlb_miss_fault /* No entry, bail */ + bne virt_page_table_tlb_miss_fault /* Hugepage; bail */ =20 /* Ok, we're all right, we can now create a kernel translation for * a 4K or 64K page from r16 -> r15. diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c index 3a393d94cecf..aa1feff218fe 100644 --- a/arch/powerpc/mm/pgtable.c +++ b/arch/powerpc/mm/pgtable.c @@ -331,6 +331,37 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned lo= ng addr, pte_t *ptep, __set_huge_pte_at(pmdp, ptep, pte_val(pte)); } } +#elif defined(CONFIG_PPC_E500) +void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, + pte_t pte, unsigned long sz) +{ + unsigned long pdsize; + int i; + + pte =3D set_pte_filter(pte, addr); + + /* + * Make sure hardware valid bit is not set. We don't do + * tlb flush for this update. + */ + VM_WARN_ON(pte_hw_valid(*ptep) && !pte_protnone(*ptep)); + + if (sz < PMD_SIZE) + pdsize =3D PAGE_SIZE; + else if (sz < PUD_SIZE) + pdsize =3D PMD_SIZE; + else if (sz < P4D_SIZE) + pdsize =3D PUD_SIZE; + else if (sz < PGDIR_SIZE) + pdsize =3D P4D_SIZE; + else + pdsize =3D PGDIR_SIZE; + + for (i =3D 0; i < sz / pdsize; i++, ptep++, addr +=3D pdsize) { + __set_pte_at(mm, addr, ptep, pte, 0); + pte =3D __pte(pte_val(pte) + ((unsigned long long)pdsize / PAGE_SIZE << = PFN_PTE_SHIFT)); + } +} #endif #endif /* CONFIG_HUGETLB_PAGE */ =20 diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platform= s/Kconfig.cputype index fa4bb096b3ae..30a78e99663e 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -291,7 +291,6 @@ config PPC_BOOK3S config PPC_E500 select FSL_EMB_PERFMON bool - select ARCH_HAS_HUGEPD if HUGETLB_PAGE select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64 select PPC_SMP_MUXED_IPI select PPC_DOORBELL --=20 2.44.0