From patchwork Mon Nov 2 22:02:30 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 57147 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nA2M2vHE011377 for ; Mon, 2 Nov 2009 22:02:58 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757067AbZKBWCe (ORCPT ); Mon, 2 Nov 2009 17:02:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757048AbZKBWCe (ORCPT ); Mon, 2 Nov 2009 17:02:34 -0500 Received: from cantor.suse.de ([195.135.220.2]:48844 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756875AbZKBWCd (ORCPT ); Mon, 2 Nov 2009 17:02:33 -0500 Received: from relay2.suse.de (mail2.suse.de [195.135.221.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.suse.de (Postfix) with ESMTP id 02AB974609; Mon, 2 Nov 2009 23:02:35 +0100 (CET) From: Alexander Graf To: kvm@vger.kernel.org Cc: Avi Kivity , kvm-ppc , Hollis Blanchard , Arnd Bergmann , Benjamin Herrenschmidt , Kevin Wolf , bphilips@suse.de, Marcelo Tosatti , Olof Johansson , linuxppc-dev@ozlabs.org Subject: [PATCH 20/28] Split init_new_context and destroy_context Date: Mon, 2 Nov 2009 23:02:30 +0100 Message-Id: <1257199351-2238-2-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1257199351-2238-1-git-send-email-agraf@suse.de> References: <1257199351-2238-1-git-send-email-agraf@suse.de> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h index b34e94d..26383e0 100644 --- a/arch/powerpc/include/asm/mmu_context.h +++ b/arch/powerpc/include/asm/mmu_context.h @@ -23,6 +23,8 @@ extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm); extern void set_context(unsigned long id, pgd_t *pgd); #ifdef CONFIG_PPC_BOOK3S_64 +extern int __init_new_context(void); +extern void __destroy_context(int context_id); static inline void mmu_context_init(void) { } #else extern void mmu_context_init(void); diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c index dbeb86a..b9e4cc2 100644 --- a/arch/powerpc/mm/mmu_context_hash64.c +++ b/arch/powerpc/mm/mmu_context_hash64.c @@ -18,6 +18,7 @@ #include #include #include +#include #include @@ -32,7 +33,7 @@ static DEFINE_IDR(mmu_context_idr); #define NO_CONTEXT 0 #define MAX_CONTEXT ((1UL << 19) - 1) -int init_new_context(struct task_struct *tsk, struct mm_struct *mm) +int __init_new_context(void) { int index; int err; @@ -57,6 +58,18 @@ again: return -ENOMEM; } + return index; +} +EXPORT_SYMBOL_GPL(__init_new_context); + +int init_new_context(struct task_struct *tsk, struct mm_struct *mm) +{ + int index; + + index = __init_new_context(); + if (index < 0) + return index; + /* The old code would re-promote on fork, we don't do that * when using slices as it could cause problem promoting slices * that have been forced down to 4K @@ -68,11 +81,16 @@ again: return 0; } -void destroy_context(struct mm_struct *mm) +void __destroy_context(int context_id) { spin_lock(&mmu_context_lock); - idr_remove(&mmu_context_idr, mm->context.id); + idr_remove(&mmu_context_idr, context_id); spin_unlock(&mmu_context_lock); +} +EXPORT_SYMBOL_GPL(__destroy_context); +void destroy_context(struct mm_struct *mm) +{ + __destroy_context(mm->context.id); mm->context.id = NO_CONTEXT; }