From patchwork Mon May 13 14:38:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Chartre X-Patchwork-Id: 10941143 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 91CE61390 for ; Mon, 13 May 2019 14:42:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8547A27861 for ; Mon, 13 May 2019 14:42:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 79A722832D; Mon, 13 May 2019 14:42:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2666627861 for ; Mon, 13 May 2019 14:42:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730780AbfEMOmg (ORCPT ); Mon, 13 May 2019 10:42:36 -0400 Received: from aserp2130.oracle.com ([141.146.126.79]:36808 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730180AbfEMOji (ORCPT ); Mon, 13 May 2019 10:39:38 -0400 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x4DESwxh183032; Mon, 13 May 2019 14:38:50 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=1/A8dPg6N3BCp1dVVHZldE7IkiS+8kPsjdwBuin2g4s=; b=IIHbvoJP5+K/6hJmjo6mwDCr+XYe5WkcmTj/jZgsHQd++1A3nrRugabuYhfepHXTNKMa V+W5LQ4oABEgMC2/bRAoDFfs1URTJrv1FkjV3nZfJhEh3aTydJM7O9zVMLE+XCLnCNo0 mgaCYQLJsGwxxqQvTsOBwgrZT+TlGys5Y+xXj8Q2b2tjQKrJs5qkBiGxQsdVfxbT4cvm AvsvkAn4MmTs1z4WmXxi/1KuzDaA9HLi5wH7yN5hYhVDuggPf0x5mUO+bX8AKL3WJ1Pd Vh+iMejI0gUwJY+npXZCvzmO6WQnPg//1CrX7b7e8J9CRrNauyV7gxxNmcg6wsYTegjc qw== Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by aserp2130.oracle.com with ESMTP id 2sdkwdfksf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 13 May 2019 14:38:50 +0000 Received: from achartre-desktop.fr.oracle.com (dhcp-10-166-106-34.fr.oracle.com [10.166.106.34]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id x4DEcZQ4022780; Mon, 13 May 2019 14:38:42 GMT From: Alexandre Chartre To: pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, kvm@vger.kernel.org, x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: konrad.wilk@oracle.com, jan.setjeeilers@oracle.com, liran.alon@oracle.com, jwadams@google.com, alexandre.chartre@oracle.com Subject: [RFC KVM 01/27] kernel: Export memory-management symbols required for KVM address space isolation Date: Mon, 13 May 2019 16:38:09 +0200 Message-Id: <1557758315-12667-2-git-send-email-alexandre.chartre@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1557758315-12667-1-git-send-email-alexandre.chartre@oracle.com> References: <1557758315-12667-1-git-send-email-alexandre.chartre@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9255 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1905130102 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Liran Alon Export symbols needed to create, manage, populate and switch a mm from a kernel module (kvm in this case). This is a hacky way for now to start. This should be changed to some suitable memory-management API. Signed-off-by: Liran Alon Signed-off-by: Alexandre Chartre --- arch/x86/kernel/ldt.c | 1 + arch/x86/mm/tlb.c | 3 ++- mm/memory.c | 5 +++++ 3 files changed, 8 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c index b2463fc..19a86e0 100644 --- a/arch/x86/kernel/ldt.c +++ b/arch/x86/kernel/ldt.c @@ -401,6 +401,7 @@ void destroy_context_ldt(struct mm_struct *mm) free_ldt_struct(mm->context.ldt); mm->context.ldt = NULL; } +EXPORT_SYMBOL_GPL(destroy_context_ldt); void ldt_arch_exit_mmap(struct mm_struct *mm) { diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 7f61431..a4db7f5 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -70,7 +70,7 @@ static void clear_asid_other(void) } atomic64_t last_mm_ctx_id = ATOMIC64_INIT(1); - +EXPORT_SYMBOL_GPL(last_mm_ctx_id); static void choose_new_asid(struct mm_struct *next, u64 next_tlb_gen, u16 *new_asid, bool *need_flush) @@ -159,6 +159,7 @@ void switch_mm(struct mm_struct *prev, struct mm_struct *next, switch_mm_irqs_off(prev, next, tsk); local_irq_restore(flags); } +EXPORT_SYMBOL_GPL(switch_mm); static void sync_current_stack_to_mm(struct mm_struct *mm) { diff --git a/mm/memory.c b/mm/memory.c index 36aac68..ede9335 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -434,6 +434,7 @@ int __pte_alloc(struct mm_struct *mm, pmd_t *pmd) pte_free(mm, new); return 0; } +EXPORT_SYMBOL_GPL(__pte_alloc); int __pte_alloc_kernel(pmd_t *pmd) { @@ -453,6 +454,7 @@ int __pte_alloc_kernel(pmd_t *pmd) pte_free_kernel(&init_mm, new); return 0; } +EXPORT_SYMBOL_GPL(__pte_alloc_kernel); static inline void init_rss_vec(int *rss) { @@ -4007,6 +4009,7 @@ int __p4d_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address) spin_unlock(&mm->page_table_lock); return 0; } +EXPORT_SYMBOL_GPL(__p4d_alloc); #endif /* __PAGETABLE_P4D_FOLDED */ #ifndef __PAGETABLE_PUD_FOLDED @@ -4039,6 +4042,7 @@ int __pud_alloc(struct mm_struct *mm, p4d_t *p4d, unsigned long address) spin_unlock(&mm->page_table_lock); return 0; } +EXPORT_SYMBOL_GPL(__pud_alloc); #endif /* __PAGETABLE_PUD_FOLDED */ #ifndef __PAGETABLE_PMD_FOLDED @@ -4072,6 +4076,7 @@ int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address) spin_unlock(ptl); return 0; } +EXPORT_SYMBOL_GPL(__pmd_alloc); #endif /* __PAGETABLE_PMD_FOLDED */ static int __follow_pte_pmd(struct mm_struct *mm, unsigned long address,