diff mbox

[v9,01/16] ARM: add mem_type prot_pte accessor

Message ID 20120703085920.27746.12269.stgit@ubuntu (mailing list archive)
State New, archived
Headers show

Commit Message

Christoffer Dall July 3, 2012, 8:59 a.m. UTC 
From: Marc Zyngier <marc.zyngier@arm.com>

The KVM hypervisor mmu code requires 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 <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
---
 arch/arm/include/asm/mach/map.h |    1 +
 arch/arm/mm/mmu.c               |    6 ++++++
 2 files changed, 7 insertions(+)


--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Comments

Andreas Färber July 20, 2012, 2:54 p.m. UTC | #1 
Am 03.07.2012 10:59, schrieb Christoffer Dall:
> From: Marc Zyngier <marc.zyngier@arm.com>
> 
> The KVM hypervisor mmu code requires requires access to the

"code requires access"

Andreas

> 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 <marc.zyngier@arm.com>
> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Christoffer Dall July 26, 2012, 9:26 p.m. UTC | #2 
On Fri, Jul 20, 2012 at 4:54 PM, Andreas Färber <afaerber@suse.de> wrote:
> Am 03.07.2012 10:59, schrieb Christoffer Dall:
>> From: Marc Zyngier <marc.zyngier@arm.com>
>>
>> The KVM hypervisor mmu code requires requires access to the
>
> "code requires access"
>

thanks,
-Christoffer
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

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 e5dad60..f7439e7 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.
  */