From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: [PATCH v10 01/14] ARM: add mem_type prot_pte accessor Date: Thu, 16 Aug 2012 11:28:05 -0400 Message-ID: <20120816152805.21484.59988.stgit@ubuntu> References: <20120816152637.21484.65421.stgit@ubuntu> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Return-path: Received: from mail-qa0-f46.google.com ([209.85.216.46]:42299 "EHLO mail-qa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754354Ab2HPP2I (ORCPT ); Thu, 16 Aug 2012 11:28:08 -0400 Received: by qaas11 with SMTP id s11so661176qaa.19 for ; Thu, 16 Aug 2012 08:28:08 -0700 (PDT) In-Reply-To: <20120816152637.21484.65421.stgit@ubuntu> Sender: kvm-owner@vger.kernel.org List-ID: From: Marc Zyngier The KVM hypervisor mmu code requires access to the mem_type prot_pte field when setting up page tables pointing to a device. Unfortunately, the mem_type structure is opaque. Add an accessor (get_mem_type_prot_pte()) to retrieve the prot_pte value. Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall --- arch/arm/include/asm/mach/map.h | 1 + arch/arm/mm/mmu.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/arch/arm/include/asm/mach/map.h b/arch/arm/include/asm/mach/map.h index a6efcdd..3787c9f 100644 --- a/arch/arm/include/asm/mach/map.h +++ b/arch/arm/include/asm/mach/map.h @@ -37,6 +37,7 @@ extern void iotable_init(struct map_desc *, int); struct mem_type; extern const struct mem_type *get_mem_type(unsigned int type); +extern pteval_t get_mem_type_prot_pte(unsigned int type); /* * external interface to remap single page with appropriate type */ diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 4c2d045..76bf4f5 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -301,6 +301,12 @@ const struct mem_type *get_mem_type(unsigned int type) } EXPORT_SYMBOL(get_mem_type); +pteval_t get_mem_type_prot_pte(unsigned int type) +{ + return get_mem_type(type)->prot_pte; +} +EXPORT_SYMBOL(get_mem_type_prot_pte); + /* * Adjust the PMD section entries according to the CPU in use. */