From mboxrd@z Thu Jan 1 00:00:00 1970 From: c.dall@virtualopensystems.com (Christoffer Dall) Date: Sat, 15 Sep 2012 11:34:36 -0400 Subject: [PATCH 01/15] ARM: add mem_type prot_pte accessor In-Reply-To: <20120915153359.21241.86002.stgit@ubuntu> References: <20120915153359.21241.86002.stgit@ubuntu> Message-ID: <20120915153436.21241.95691.stgit@ubuntu> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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. */