From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x227SBpCr57EHbVLToxDcHQVP2XUkeXdQgg8zVMWLgcfeK5W/5ls4xbJv23Ze7VJhiY51Id7+ ARC-Seal: i=1; a=rsa-sha256; t=1516647311; cv=none; d=google.com; s=arc-20160816; b=ngK9yhwWYlRCRBs5LQpQZV4Ih5LtP0ZGrlagEyNZEh7X0/hHdRKmtgFNSs6qlfBSUI JAcIh7GyT5AY6AJl7nBNZIMgHYPMom4+aQBeHY0oDndVjSnZuSCWofCVcrH/74c5++Xq CHFSj1f3uvzE1RDmRVKitLzM0GjV9xpfhhlAMlHX+5q2XvUEyk31mSUl5+fYL61eELYh RDV9/9ugY+fRcbhFyh/Na3RvRNXoDCH8i4QDcWaqTGBB6Henws4kg8fL4v3Ct3WXsUKc WlCmHg216jzRiyqQt33NY2pD5wh2kbtKQetpn1cR8FM/E6XkYHgyFHByTIw0zsXOgTpU DdTA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=hGUSIUbG1415nxZzlks2jdWoaNEtVVGxaqbb2F5cASE=; b=y51kbQrTISpf/V2WMoK0x9mkKxZROAoXeXLOEA3g81bW3npbR+SLpvsOdcMerYpGx0 FfiZxTBGDWA80ZNb7FUkULlMCUTAPFizZXaqf8ZfGx0bsU1xWT8PNSOON4pEdWVDVKAE ZhUAC9TUPcvaMOZKMZoW/g87yXgAh9gGVpt/ss0ouqVHY0zT49jB6ninBMqw9Kv9aE3d xIdbV8K45/78gergHI21rDR2OI64t8uFYMeCNsn1oFBkEbRR8ZojaNjgVIKz32Nx6tWg hU2sGiQO5FbFhsprVd8qf2J6XXE1JkGI4New2TiyqI8gWWMe8taH4KxPB1cd/oEtds8A CUlQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20161025 header.b=BcN9BBc6; spf=pass (google.com: best guess record for domain of linux-kselftest-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kselftest-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20161025 header.b=BcN9BBc6; spf=pass (google.com: best guess record for domain of linux-kselftest-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kselftest-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751762AbeAVSyy (ORCPT ); Mon, 22 Jan 2018 13:54:54 -0500 Received: from mail-qt0-f194.google.com ([209.85.216.194]:41694 "EHLO mail-qt0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751575AbeAVSxw (ORCPT ); Mon, 22 Jan 2018 13:53:52 -0500 From: Ram Pai To: shuahkh@osg.samsung.com, linux-kselftest@vger.kernel.org Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, x86@kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, akpm@linux-foundation.org, dave.hansen@intel.com, benh@kernel.crashing.org, paulus@samba.org, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, hbabu@us.ibm.com, mhocko@kernel.org, bauerman@linux.vnet.ibm.com, ebiederm@xmission.com, linuxram@us.ibm.com, arnd@arndb.de Subject: [PATCH v10 21/24] selftests/vm: sub-page allocator Date: Mon, 22 Jan 2018 10:52:14 -0800 Message-Id: <1516647137-11174-22-git-send-email-linuxram@us.ibm.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1516647137-11174-1-git-send-email-linuxram@us.ibm.com> References: <1516647137-11174-1-git-send-email-linuxram@us.ibm.com> Sender: linux-kselftest-owner@vger.kernel.org X-Mailing-List: linux-kselftest@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1590319971851934865?= X-GMAIL-MSGID: =?utf-8?q?1590319971851934865?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: introduce a new allocator that allocates 4k hardware-pages to back 64k linux-page. This allocator is only applicable on powerpc. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 30 ++++++++++++++++++++++++++ 1 files changed, 30 insertions(+), 0 deletions(-) diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index 5783587..ae71dad 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -766,6 +766,35 @@ void free_pkey_malloc(void *ptr) return ptr; } +void *malloc_pkey_with_mprotect_subpage(long size, int prot, u16 pkey) +{ +#ifdef __powerpc64__ + void *ptr; + int ret; + + dprintf1("doing %s(size=%ld, prot=0x%x, pkey=%d)\n", __func__, + size, prot, pkey); + pkey_assert(pkey < NR_PKEYS); + ptr = mmap(NULL, size, prot, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); + pkey_assert(ptr != (void *)-1); + + ret = syscall(__NR_subpage_prot, ptr, size, NULL); + if (ret) { + perror("subpage_perm"); + return PTR_ERR_ENOTSUP; + } + + ret = mprotect_pkey((void *)ptr, PAGE_SIZE, prot, pkey); + pkey_assert(!ret); + record_pkey_malloc(ptr, size); + + dprintf1("%s() for pkey %d @ %p\n", __func__, pkey, ptr); + return ptr; +#else /* __powerpc64__ */ + return PTR_ERR_ENOTSUP; +#endif /* __powerpc64__ */ +} + void *malloc_pkey_anon_huge(long size, int prot, u16 pkey) { int ret; @@ -888,6 +917,7 @@ void setup_hugetlbfs(void) void *(*pkey_malloc[])(long size, int prot, u16 pkey) = { malloc_pkey_with_mprotect, + malloc_pkey_with_mprotect_subpage, malloc_pkey_anon_huge, malloc_pkey_hugetlb /* can not do direct with the pkey_mprotect() API: -- 1.7.1