---
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>
---
v6: We added this patch to our patch series.
---
xen/arch/arm/guestcopy.c | 50 ++++++++++++++++++++++++++++++++++++++
xen/arch/arm/vgic-v3-its.c | 1 +
xen/arch/arm/vgic.c | 49 -------------------------------------
xen/include/asm-arm/guest_access.h | 3 +++
xen/include/asm-arm/vgic.h | 3 ---
5 files changed, 54 insertions(+), 52 deletions(-)
diff --git a/xen/arch/arm/guestcopy.c b/xen/arch/arm/guestcopy.c
index 413125f02b..938ffe2668 100644
--- a/xen/arch/arm/guestcopy.c
+++ b/xen/arch/arm/guestcopy.c
@@ -118,6 +118,56 @@ unsigned long raw_copy_from_guest(void *to, const void
__user *from, unsigned le
}
return 0;
}
+
+/*
+ * Temporarily map one physical guest page and copy data to or from it.
+ * The data to be copied cannot cross a page boundary.
+ */
+int vgic_access_guest_memory(struct domain *d, paddr_t gpa, void *buf,
+ uint32_t size, bool is_write)
+{
+ struct page_info *page;
+ uint64_t offset = gpa & ~PAGE_MASK; /* Offset within the mapped page */
+ p2m_type_t p2mt;
+ void *p;
+
+ /* Do not cross a page boundary. */
+ if ( size > (PAGE_SIZE - offset) )
+ {
+ printk(XENLOG_G_ERR "d%d: vITS: memory access would cross page
boundary\n",
+ d->domain_id);
+ return -EINVAL;
+ }
+
+ page = get_page_from_gfn(d, paddr_to_pfn(gpa), &p2mt, P2M_ALLOC);
+ if ( !page )
+ {
+ printk(XENLOG_G_ERR "d%d: vITS: Failed to get table entry\n",
+ d->domain_id);
+ return -EINVAL;
+ }
+
+ if ( !p2m_is_ram(p2mt) )
+ {
+ put_page(page);
+ printk(XENLOG_G_ERR "d%d: vITS: memory used by the ITS should be RAM.",
+ d->domain_id);
+ return -EINVAL;
+ }
+
+ p = __map_domain_page(page);
+
+ if ( is_write )
+ memcpy(p + offset, buf, size);
+ else
+ memcpy(buf, p + offset, size);
+
+ unmap_domain_page(p);
+ put_page(page);
+
+ return 0;
+}
+
/*
* Local variables:
* mode: C
diff --git a/xen/arch/arm/vgic-v3-its.c b/xen/arch/arm/vgic-v3-its.c
index 9ef792f479..1af6820cab 100644
--- a/xen/arch/arm/vgic-v3-its.c
+++ b/xen/arch/arm/vgic-v3-its.c
@@ -39,6 +39,7 @@
#include <xen/sched.h>
#include <xen/sizes.h>
#include <asm/current.h>
+#include <asm/guest_access.h>
#include <asm/mmio.h>
#include <asm/gic_v3_defs.h>
#include <asm/gic_v3_its.h>
diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 1e5107b9f8..7a4e3cdc88 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -638,55 +638,6 @@ void vgic_free_virq(struct domain *d, unsigned int virq)
}
/*
- * Temporarily map one physical guest page and copy data to or from it.
- * The data to be copied cannot cross a page boundary.
- */
-int vgic_access_guest_memory(struct domain *d, paddr_t gpa, void *buf,
- uint32_t size, bool is_write)
-{
- struct page_info *page;
- uint64_t offset = gpa & ~PAGE_MASK; /* Offset within the mapped page */
- p2m_type_t p2mt;
- void *p;
-
- /* Do not cross a page boundary. */
- if ( size > (PAGE_SIZE - offset) )
- {
- printk(XENLOG_G_ERR "d%d: vITS: memory access would cross page
boundary\n",
- d->domain_id);
- return -EINVAL;
- }
-
- page = get_page_from_gfn(d, paddr_to_pfn(gpa), &p2mt, P2M_ALLOC);
- if ( !page )
- {
- printk(XENLOG_G_ERR "d%d: vITS: Failed to get table entry\n",
- d->domain_id);
- return -EINVAL;
- }
-
- if ( !p2m_is_ram(p2mt) )
- {
- put_page(page);
- printk(XENLOG_G_ERR "d%d: vITS: memory used by the ITS should be RAM.",
- d->domain_id);
- return -EINVAL;
- }
-
- p = __map_domain_page(page);
-
- if ( is_write )
- memcpy(p + offset, buf, size);
- else
- memcpy(buf, p + offset, size);
-
- unmap_domain_page(p);
- put_page(page);
-
- return 0;
-}
-
-/*
* Local variables:
* mode: C
* c-file-style: "BSD"
diff --git a/xen/include/asm-arm/guest_access.h
b/xen/include/asm-arm/guest_access.h
index 251e935597..49716501a4 100644
--- a/xen/include/asm-arm/guest_access.h
+++ b/xen/include/asm-arm/guest_access.h
@@ -10,6 +10,9 @@ unsigned long raw_copy_to_guest_flush_dcache(void *to, const
void *from,
unsigned long raw_copy_from_guest(void *to, const void *from, unsigned len);
unsigned long raw_clear_guest(void *to, unsigned len);
+int vgic_access_guest_memory(struct domain *d, paddr_t gpa, void *buf,
+ uint32_t size, bool_t is_write);
+
#define __raw_copy_to_guest raw_copy_to_guest
#define __raw_copy_from_guest raw_copy_from_guest
#define __raw_clear_guest raw_clear_guest
diff --git a/xen/include/asm-arm/vgic.h b/xen/include/asm-arm/vgic.h
index d4ed23df28..e489d0bf21 100644
--- a/xen/include/asm-arm/vgic.h
+++ b/xen/include/asm-arm/vgic.h
@@ -217,9 +217,6 @@ extern void register_vgic_ops(struct domain *d, const
struct vgic_ops *ops);
int vgic_v2_init(struct domain *d, int *mmio_count);
int vgic_v3_init(struct domain *d, int *mmio_count);
-int vgic_access_guest_memory(struct domain *d, paddr_t gpa, void *buf,
- uint32_t size, bool_t is_write);
-
extern int domain_vgic_register(struct domain *d, int *mmio_count);
extern int vcpu_vgic_free(struct vcpu *v);
extern bool vgic_to_sgi(struct vcpu *v, register_t sgir,
