From patchwork Tue Dec 10 02:41:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kalesh Singh X-Patchwork-Id: 13900748 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 122DE21E0AF for ; Tue, 10 Dec 2024 02:41:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733798509; cv=none; b=ccy35jU4sH9bfTaspsELg6YNgiqxRjvm4jIFgQcnvEEJv9yrvAkwdLLy8q79K0R2CD+FYw3VIEYAZz+EP/3xB7rUZkDKWA4CwwsmyXW/6oeMa+9qQ+guAQ9LOu2GsxtfZczrS1b/9JpqtVe9k++RxMMO9nDw6i4BRRdyEmQIS64= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733798509; c=relaxed/simple; bh=R0cSn9KJwbsX+V2mZ7ohQbGUKA5C8mxvYsyv7+LaANE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=nTz4HuW4+Xgi1NSzo1682gTMUs9hZkCAALQyl8QGp7i6XqFVWBaYvvMI7K9fUoLonsvdl++ulGZ8n8+YdwPYt6HJdPJjguPHGdSyhQmiWuaxnvSVMivW7NQN3rBIl4wrVBDEpHWNycwgvWEhQXbe90W+fQdjiHbOs0llvX8x96U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--kaleshsingh.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=W9r8ZX0n; arc=none smtp.client-ip=209.85.216.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--kaleshsingh.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="W9r8ZX0n" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-2eeeb5b7022so4909475a91.0 for ; Mon, 09 Dec 2024 18:41:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1733798505; x=1734403305; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=1BAtlrJSVyRPOsQk5wSikGaGR3zqoYCpGFeQDDyhzvw=; b=W9r8ZX0n/1uvoulO9H5J2y3cMcWOvzkNtmuMCDGcRSadp4LhH1I3loOV1UOpyZDOud 2tVP1opMDrjX7dx3PxYNG1893kRu7DgRNHR59u2gSSZPE9Dd4ck0ahr81PO27zNoicAp TQLFv2ve9IvBT4NiBqM1LpZN49gKWvt8LvLUH5qbhmV71H4Rhpy7IuOddQEOEfHl+fvQ R+DR8E+wohbn+WLC85IoGwksCbv8VH1dgn+7LP0BrW8QLMqEqv+F/fdQ2eMe68sBbtnh gO6kSvm4Cwc30G+Wtv+x9frUuXKVKwWZ8ZpFgrXD5cOq5WY5Qv6YtZ4NxpIV4vBsj0l6 xHvg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733798505; x=1734403305; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=1BAtlrJSVyRPOsQk5wSikGaGR3zqoYCpGFeQDDyhzvw=; b=TG3aEX6Pp9YK6zWOqcowQCKyuFPvkH2oWeqgA5UZ5rP/UCvlc4B1yjQePXRj6sOX4G kqlkwRYiR8gtwIkXTwPWSRJcWIyrNJSPblTLiSg3M+pqK5/pCy/qEeN1AxvRUZMCYv/n GF5uM5mOlzXAqt7jm5J2iGhLS4dUz1hHSHrRby/JkUc/qzIZXQJAcAtSZz/yfIOhSYMj GKs5r+eQJAhYdq0MNK4zDQIy+KEPUglXCABXRRXQGyduu4mOeQGz7ItIFR4ryvDygBuo Hh2cSWHKygrbKyPsPvb3o/NBSpP1NonGXXAYb32l7KzOfEiUR3SnjPbPR1/7DKuImlG3 lRXg== X-Forwarded-Encrypted: i=1; AJvYcCXfA1WRbceaU7sBlsSPTwF8UDWnF8+aR3s6o2Oi2QgPtP+Wng4xzqalDL/YDHLv7Z49WU9qeCJZBQ==@vger.kernel.org X-Gm-Message-State: AOJu0YwqDBUr9RwaKgw6YYQP050FljTBjsoFtLrigrK19udHORNvSqa5 Ncwr3ATSj/2qQCY8mCdHnzmVozdSzosRyaOtAzXYRdNdXeMf+WDEU0DvBbpmsiRcukue6FUKz0C BZkoEhOnXw9k5q4wqTMiVQA== X-Google-Smtp-Source: AGHT+IG3H2VSitmLlBO6Re0RjQMAvCNU6wOeSZb7FxqqgQkEm7xuddsNJr2NEUZE8SQmtflSqHbUwj9vfGvySeSwAw== X-Received: from pjbnr3.prod.google.com ([2002:a17:90b:2403:b0:2ef:6fb0:55fb]) (user=kaleshsingh job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:4a06:b0:2ee:9a82:5a93 with SMTP id 98e67ed59e1d1-2efcf138437mr4485348a91.14.1733798505429; Mon, 09 Dec 2024 18:41:45 -0800 (PST) Date: Mon, 9 Dec 2024 18:41:14 -0800 In-Reply-To: <20241210024119.2488608-1-kaleshsingh@google.com> Precedence: bulk X-Mailing-List: linux-sh@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241210024119.2488608-1-kaleshsingh@google.com> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog Message-ID: <20241210024119.2488608-13-kaleshsingh@google.com> Subject: [PATCH mm-unstable 12/17] mm: sparc32: Introduce arch_mmap_hint() From: Kalesh Singh To: akpm@linux-foundation.org, vbabka@suse.cz, yang@os.amperecomputing.com, riel@surriel.com, david@redhat.com Cc: linux@armlinux.org.uk, tsbogend@alpha.franken.de, James.Bottomley@HansenPartnership.com, ysato@users.sourceforge.jp, dalias@libc.org, glaubitz@physik.fu-berlin.de, davem@davemloft.net, andreas@gaisler.com, tglx@linutronix.de, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com, bhelgaas@google.com, jason.andryuk@amd.com, leitao@debian.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, kernel-team@android.com, android-mm@google.com, Kalesh Singh Introduce sparc32 arch_mmap_hint() and define HAVE_ARCH_MMAP_HINT. If a sufficiently sized hole doesn't exist at the hint address, fallback to searching the entire valid VA space instead of only the VA space above the hint address. Signed-off-by: Kalesh Singh --- arch/sparc/include/asm/pgtable_32.h | 1 + arch/sparc/kernel/sys_sparc_32.c | 21 ++++++++++++++++++--- 2 files changed, 19 insertions(+), 3 deletions(-) diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h index 62bcafe38b1f..95084c4d0b01 100644 --- a/arch/sparc/include/asm/pgtable_32.h +++ b/arch/sparc/include/asm/pgtable_32.h @@ -437,6 +437,7 @@ static inline int io_remap_pfn_range(struct vm_area_struct *vma, /* We provide our own get_unmapped_area to cope with VA holes for userland */ #define HAVE_ARCH_UNMAPPED_AREA +#define HAVE_ARCH_MMAP_HINT #define pmd_pgtable(pmd) ((pgtable_t)__pmd_page(pmd)) diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c index fb31bc0c5b48..2d5065ee1a94 100644 --- a/arch/sparc/kernel/sys_sparc_32.c +++ b/arch/sparc/kernel/sys_sparc_32.c @@ -40,6 +40,19 @@ SYSCALL_DEFINE0(getpagesize) return PAGE_SIZE; /* Possibly older binaries want 8192 on sun4's? */ } +unsigned long arch_mmap_hint(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + if (!addr) + return 0; + + if (len > TASK_SIZE - PAGE_SIZE) + return 0; + + return generic_mmap_hint(filp, addr, len, pgoff, flags); +} + unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags, vm_flags_t vm_flags) { struct vm_unmapped_area_info info = {}; @@ -61,11 +74,13 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi /* See asm-sparc/uaccess.h */ if (len > TASK_SIZE - PAGE_SIZE) return -ENOMEM; - if (!addr) - addr = TASK_UNMAPPED_BASE; + + addr = arch_mmap_hint(filp, addr, len, pgoff, flags); + if (addr) + return addr; info.length = len; - info.low_limit = addr; + info.low_limit = TASK_UNMAPPED_BASE; info.high_limit = TASK_SIZE; if (!file_hugepage) { info.align_mask = (flags & MAP_SHARED) ?