From patchwork Tue Nov 3 09:27:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11879833 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=-6.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 9C8DBC55178 for ; Wed, 4 Nov 2020 08:22:41 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 32EDC20782 for ; Wed, 4 Nov 2020 08:22:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="ZQhpZJ3+"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="+Tr1EUdB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 32EDC20782 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 729C8891D9; Wed, 4 Nov 2020 08:22:14 +0000 (UTC) Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by gabe.freedesktop.org (Postfix) with ESMTPS id 990106EC6F; Tue, 3 Nov 2020 10:33:46 +0000 (UTC) Message-Id: <20201103095858.311016780@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1604399624; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=Cjsm5AI/c+3evBtpF2KjlIuXYCPOCd9e8tBiUfMlUaw=; b=ZQhpZJ3+kLwAZrJXydOt+PuVIPxDpjWDA6FzsVyeE1usg/G1RiAciJ+g/1ozN8xiuc0c17 RaNnUX66QFZ6g+/Md+sO3vjst9IGcsoVU4cMn4smorjv2YRBImN1+rgl0ttOs2hSC2+XZZ G9avgq7GfrZw2d+qivd3YkgN3zLDG+gLAdqZlsS3S5CYxubpcYtuSYKuMNeCyyLY6xUfaB 8CXdUxNwL64hRfu9SIduSwb1Bz7FjieyT0n/nq9XHMdRdrdAtLLKERmntXNNZ9KSP0MqyP J/oz0kwJPhhq7GeT3Gvrytt4up4s+0ead/gIb6+lkesJN+z2l3Xs3f2lPm0k+w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1604399624; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=Cjsm5AI/c+3evBtpF2KjlIuXYCPOCd9e8tBiUfMlUaw=; b=+Tr1EUdBI2nqN/XcIr0/XkDukOyzZt/P5QZvNyJzjJ2uWVy7DSbkYWtDbt8rT4wXfOusfx pgPkyLWSr37o52Bw== Date: Tue, 03 Nov 2020 10:27:29 +0100 From: Thomas Gleixner To: LKML Subject: [patch V3 17/37] xtensa/mm/highmem: Switch to generic kmap atomic References: <20201103092712.714480842@linutronix.de> MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 04 Nov 2020 08:22:13 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juri Lelli , linux-aio@kvack.org, Peter Zijlstra , Sebastian Andrzej Siewior , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, Ben Segall , Chris Mason , Huang Rui , Paul Mackerras , Gerd Hoffmann , Daniel Bristot de Oliveira , sparclinux@vger.kernel.org, Vincent Chen , Christoph Hellwig , Vincent Guittot , Arnd Bergmann , Max Filippov , Michael Ellerman , x86@kernel.org, Russell King , linux-csky@vger.kernel.org, Ingo Molnar , David Airlie , VMware Graphics , Mel Gorman , nouveau@lists.freedesktop.org, Dave Airlie , linux-snps-arc@lists.infradead.org, Ben Skeggs , linux-xtensa@linux-xtensa.org, Paul McKenney , intel-gfx@lists.freedesktop.org, Roland Scheidegger , Josef Bacik , Steven Rostedt , Linus Torvalds , Alexander Viro , spice-devel@lists.freedesktop.org, David Sterba , Rodrigo Vivi , Dietmar Eggemann , linux-arm-kernel@lists.infradead.org, Chris Zankel , Michal Simek , Thomas Bogendoerfer , Nick Hu , linux-mm@kvack.org, Vineet Gupta , linux-mips@vger.kernel.org, Christian Koenig , Benjamin LaHaise , linux-fsdevel@vger.kernel.org, Andrew Morton , linuxppc-dev@lists.ozlabs.org, "David S. Miller" , linux-btrfs@vger.kernel.org, Greentime Hu Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" No reason having the same code in every architecture Signed-off-by: Thomas Gleixner Cc: Chris Zankel Cc: Max Filippov Cc: linux-xtensa@linux-xtensa.org --- V3: Remove the kmap types cruft --- arch/xtensa/Kconfig | 1 arch/xtensa/include/asm/fixmap.h | 4 +-- arch/xtensa/include/asm/highmem.h | 12 ++++++++- arch/xtensa/mm/highmem.c | 46 ++++---------------------------------- 4 files changed, 18 insertions(+), 45 deletions(-) --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -666,6 +666,7 @@ endchoice config HIGHMEM bool "High Memory Support" depends on MMU + select KMAP_LOCAL help Linux can use the full amount of RAM in the system by default. However, the default MMUv2 setup only maps the --- a/arch/xtensa/include/asm/fixmap.h +++ b/arch/xtensa/include/asm/fixmap.h @@ -16,7 +16,7 @@ #ifdef CONFIG_HIGHMEM #include #include -#include +#include #endif /* @@ -39,7 +39,7 @@ enum fixed_addresses { /* reserved pte's for temporary kernel mappings */ FIX_KMAP_BEGIN, FIX_KMAP_END = FIX_KMAP_BEGIN + - (KM_TYPE_NR * NR_CPUS * DCACHE_N_COLORS) - 1, + (KM_MAX_IDX * NR_CPUS * DCACHE_N_COLORS) - 1, #endif __end_of_fixed_addresses }; --- a/arch/xtensa/include/asm/highmem.h +++ b/arch/xtensa/include/asm/highmem.h @@ -16,9 +16,8 @@ #include #include #include -#include -#define PKMAP_BASE ((FIXADDR_START - \ +#define PKMAP_BASE ((FIXADDR_START - \ (LAST_PKMAP + 1) * PAGE_SIZE) & PMD_MASK) #define LAST_PKMAP (PTRS_PER_PTE * DCACHE_N_COLORS) #define LAST_PKMAP_MASK (LAST_PKMAP - 1) @@ -68,6 +67,15 @@ static inline void flush_cache_kmaps(voi flush_cache_all(); } +enum fixed_addresses kmap_local_map_idx(int type, unsigned long pfn); +#define arch_kmap_local_map_idx kmap_local_map_idx + +enum fixed_addresses kmap_local_unmap_idx(int type, unsigned long addr); +#define arch_kmap_local_unmap_idx kmap_local_unmap_idx + +#define arch_kmap_local_post_unmap(vaddr) \ + local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE) + void kmap_init(void); #endif --- a/arch/xtensa/mm/highmem.c +++ b/arch/xtensa/mm/highmem.c @@ -12,8 +12,6 @@ #include #include -static pte_t *kmap_pte; - #if DCACHE_WAY_SIZE > PAGE_SIZE unsigned int last_pkmap_nr_arr[DCACHE_N_COLORS]; wait_queue_head_t pkmap_map_wait_arr[DCACHE_N_COLORS]; @@ -33,59 +31,25 @@ static inline void kmap_waitqueues_init( static inline enum fixed_addresses kmap_idx(int type, unsigned long color) { - return (type + KM_TYPE_NR * smp_processor_id()) * DCACHE_N_COLORS + + return (type + KM_MAX_IDX * smp_processor_id()) * DCACHE_N_COLORS + color; } -void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) +enum fixed_addresses kmap_local_map_idx(int type, unsigned long pfn) { - enum fixed_addresses idx; - unsigned long vaddr; - - idx = kmap_idx(kmap_atomic_idx_push(), - DCACHE_ALIAS(page_to_phys(page))); - vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); -#ifdef CONFIG_DEBUG_HIGHMEM - BUG_ON(!pte_none(*(kmap_pte + idx))); -#endif - set_pte(kmap_pte + idx, mk_pte(page, prot)); - - return (void *)vaddr; + return kmap_idx(type, DCACHE_ALIAS(pfn << PAGE_SHIFT)); } -EXPORT_SYMBOL(kmap_atomic_high_prot); -void kunmap_atomic_high(void *kvaddr) +enum fixed_addresses kmap_local_unmap_idx(int type, unsigned long addr) { - if (kvaddr >= (void *)FIXADDR_START && - kvaddr < (void *)FIXADDR_TOP) { - int idx = kmap_idx(kmap_atomic_idx(), - DCACHE_ALIAS((unsigned long)kvaddr)); - - /* - * Force other mappings to Oops if they'll try to access this - * pte without first remap it. Keeping stale mappings around - * is a bad idea also, in case the page changes cacheability - * attributes or becomes a protected page in a hypervisor. - */ - pte_clear(&init_mm, kvaddr, kmap_pte + idx); - local_flush_tlb_kernel_range((unsigned long)kvaddr, - (unsigned long)kvaddr + PAGE_SIZE); - - kmap_atomic_idx_pop(); - } + return kmap_idx(type, DCACHE_ALIAS(addr)); } -EXPORT_SYMBOL(kunmap_atomic_high); void __init kmap_init(void) { - unsigned long kmap_vstart; - /* Check if this memory layout is broken because PKMAP overlaps * page table. */ BUILD_BUG_ON(PKMAP_BASE < TLBTEMP_BASE_1 + TLBTEMP_SIZE); - /* cache the first kmap pte */ - kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN); - kmap_pte = virt_to_kpte(kmap_vstart); kmap_waitqueues_init(); }