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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v12 07/14] xen/common: move the memory_mapping DOMCTL hypercall to common code
This commit moves to common code the implementation of the memory_mapping
DOMCTL, currently available only for the x86 architecture. It also adds
a definition for the PADDR_BITS constant for ARM, that is to be used in
common code and currently not available for the ARM architecture.
Signed-off-by: Arianna Avanzini <avanzini.arianna@xxxxxxxxx>
Acked-by: Jan Beulich <JBeulich@xxxxxxxx>
Acked-by: Julien Grall <julien.grall@xxxxxxxxxx>
Tested-by: Julien Grall <julien.grall@xxxxxxxxxx>
Cc: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
Cc: Paolo Valente <paolo.valente@xxxxxxxxxx>
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Cc: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Cc: Keir Fraser <keir@xxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>
Cc: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Eric Trudeau <etrudeau@xxxxxxxxxxxx>
Cc: Viktor Kleinik <viktor.kleinik@xxxxxxxxxxxxxxx>
Cc: Andrii Tseglytskyi <andrii.tseglytskyi@xxxxxxxxxxxxxxx>
---
v9:
- Don't expose the type mfn_t to common code; let the x86-specific map/
unmap functions perform the type cast and use unsigned long in common
code.
v7:
- Change the name of tmp_rc to rc. Also, do not uselessly initialize it.
- ifdef out the invocation of memory_type_changed() to be called only
if the architecture is x86 instead of adding an useless empty stub
for ARM.
v6:
- Add an empty definition of the memory_type_changed() function for ARM.
v5:
- Rename new header to p2m-common.h.
v4:
- Use a define for paddr_bits instead of a new variable.
- Define prototypes for common functions map_mmio_regions() and
unmap_mmio_regions() only once in a common header.
v3:
- Add a paddr_bits variable for ARM.
v2:
- Move code to xen/arm/domctl.c.
---
xen/arch/arm/p2m.c | 8 +++---
xen/arch/x86/domctl.c | 68 --------------------------------------------
xen/common/domctl.c | 68 ++++++++++++++++++++++++++++++++++++++++++++
xen/include/asm-arm/p2m.h | 15 +++-------
xen/include/asm-x86/p2m.h | 13 +--------
xen/include/xen/p2m-common.h | 16 +++++++++++
6 files changed, 93 insertions(+), 95 deletions(-)
create mode 100644 xen/include/xen/p2m-common.h
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 6f32e81..e83fff1 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -883,24 +883,24 @@ int p2m_populate_ram(struct domain *d,
int map_mmio_regions(struct domain *d,
unsigned long start_gfn,
- unsigned long nr_mfns,
+ unsigned long nr,
unsigned long mfn)
{
return apply_p2m_changes(d, INSERT,
pfn_to_paddr(start_gfn),
- pfn_to_paddr(start_gfn + nr_mfns),
+ pfn_to_paddr(start_gfn + nr),
pfn_to_paddr(mfn),
MATTR_DEV, p2m_mmio_direct);
}
int unmap_mmio_regions(struct domain *d,
unsigned long start_gfn,
- unsigned long nr_mfns,
+ unsigned long nr,
unsigned long mfn)
{
return apply_p2m_changes(d, REMOVE,
pfn_to_paddr(start_gfn),
- pfn_to_paddr(start_gfn + nr_mfns),
+ pfn_to_paddr(start_gfn + nr),
pfn_to_paddr(mfn),
MATTR_DEV, p2m_invalid);
}
diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index caa3be6..7a5de43 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -641,74 +641,6 @@ long arch_do_domctl(
}
break;
- case XEN_DOMCTL_memory_mapping:
- {
- unsigned long gfn = domctl->u.memory_mapping.first_gfn;
- unsigned long mfn = domctl->u.memory_mapping.first_mfn;
- unsigned long nr_mfns = domctl->u.memory_mapping.nr_mfns;
- unsigned long mfn_end = mfn + nr_mfns - 1;
- int add = domctl->u.memory_mapping.add_mapping;
-
- ret = -EINVAL;
- if ( mfn_end < mfn || /* wrap? */
- ((mfn | mfn_end) >> (paddr_bits - PAGE_SHIFT)) ||
- (gfn + nr_mfns - 1) < gfn ) /* wrap? */
- break;
-
- ret = -EPERM;
- if ( !iomem_access_permitted(current->domain, mfn, mfn_end) )
- break;
-
- ret = xsm_iomem_mapping(XSM_HOOK, d, mfn, mfn_end, add);
- if ( ret )
- break;
-
- if ( add )
- {
- printk(XENLOG_G_INFO
- "memory_map:add: dom%d gfn=%lx mfn=%lx nr=%lx\n",
- d->domain_id, gfn, mfn, nr_mfns);
-
- ret = iomem_permit_access(d, mfn, mfn_end);
- if ( !ret )
- {
- ret = map_mmio_regions(d, gfn, nr_mfns, mfn);
- if ( ret )
- {
- printk(XENLOG_G_WARNING
- "memory_map:fail: dom%d gfn=%lx mfn=%lx nr=%lx
ret:%ld\n",
- d->domain_id, gfn, mfn, nr_mfns, ret);
- if ( iomem_deny_access(d, mfn, mfn_end) &&
- is_hardware_domain(current->domain) )
- printk(XENLOG_ERR
- "memory_map: failed to deny dom%d access to
[%lx,%lx]\n",
- d->domain_id, mfn, mfn_end);
- }
- }
- }
- else
- {
- int rc = 0;
-
- printk(XENLOG_G_INFO
- "memory_map:remove: dom%d gfn=%lx mfn=%lx nr=%lx\n",
- d->domain_id, gfn, mfn, nr_mfns);
-
- rc = unmap_mmio_regions(d, gfn, nr_mfns, mfn);
- ret = iomem_deny_access(d, mfn, mfn_end);
- if ( !ret )
- ret = rc;
- if ( ret && is_hardware_domain(current->domain) )
- printk(XENLOG_ERR
- "memory_map: error %ld %s dom%d access to [%lx,%lx]\n",
- ret, rc ? "removing" : "denying", d->domain_id,
- mfn, mfn_end);
- }
- /* Do this unconditionally to cover errors on above failure paths. */
- memory_type_changed(d);
- }
- break;
-
case XEN_DOMCTL_ioport_mapping:
{
struct hvm_iommu *hd;
diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index 24102c0..80b7800 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -902,6 +902,74 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t)
u_domctl)
}
break;
+ case XEN_DOMCTL_memory_mapping:
+ {
+ unsigned long gfn = op->u.memory_mapping.first_gfn;
+ unsigned long mfn = op->u.memory_mapping.first_mfn;
+ unsigned long nr_mfns = op->u.memory_mapping.nr_mfns;
+ unsigned long mfn_end = mfn + nr_mfns - 1;
+ int add = op->u.memory_mapping.add_mapping;
+
+ ret = -EINVAL;
+ if ( mfn_end < mfn || /* wrap? */
+ ((mfn | mfn_end) >> (paddr_bits - PAGE_SHIFT)) ||
+ (gfn + nr_mfns - 1) < gfn ) /* wrap? */
+ break;
+
+ ret = -EPERM;
+ if ( !iomem_access_permitted(current->domain, mfn, mfn_end) )
+ break;
+
+ ret = xsm_iomem_mapping(XSM_HOOK, d, mfn, mfn_end, add);
+ if ( ret )
+ break;
+
+ if ( add )
+ {
+ printk(XENLOG_G_INFO
+ "memory_map:add: dom%d gfn=%lx mfn=%lx nr=%lx\n",
+ d->domain_id, gfn, mfn, nr_mfns);
+
+ ret = iomem_permit_access(d, mfn, mfn_end);
+ if ( !ret )
+ {
+ ret = map_mmio_regions(d, gfn, nr_mfns, mfn);
+ if ( ret )
+ {
+ printk(XENLOG_G_WARNING
+ "memory_map:fail: dom%d gfn=%lx mfn=%lx nr=%lx
ret:%ld\n",
+ d->domain_id, gfn, mfn, nr_mfns, ret);
+ if ( iomem_deny_access(d, mfn, mfn_end) &&
+ is_hardware_domain(current->domain) )
+ printk(XENLOG_ERR
+ "memory_map: failed to deny dom%d access to
[%lx,%lx]\n",
+ d->domain_id, mfn, mfn_end);
+ }
+ }
+ }
+ else
+ {
+ int rc = 0;
+
+ printk(XENLOG_G_INFO
+ "memory_map:remove: dom%d gfn=%lx mfn=%lx nr=%lx\n",
+ d->domain_id, gfn, mfn, nr_mfns);
+
+ rc = unmap_mmio_regions(d, gfn, nr_mfns, mfn);
+ ret = iomem_deny_access(d, mfn, mfn_end);
+ if ( !ret )
+ ret = rc;
+ if ( ret && is_hardware_domain(current->domain) )
+ printk(XENLOG_ERR
+ "memory_map: error %ld %s dom%d access to [%lx,%lx]\n",
+ ret, rc ? "removing" : "denying", d->domain_id,
+ mfn, mfn_end);
+ }
+ /* Do this unconditionally to cover errors on above failure paths. */
+ memory_type_changed(d);
+ }
+ break;
+
case XEN_DOMCTL_settimeoffset:
{
domain_set_time_offset(d, op->u.settimeoffset.time_offset_seconds);
diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
index 648144f..08ce07b 100644
--- a/xen/include/asm-arm/p2m.h
+++ b/xen/include/asm-arm/p2m.h
@@ -3,6 +3,10 @@
#include <xen/mm.h>
+#include <xen/p2m-common.h>
+
+#define paddr_bits PADDR_BITS
+
struct domain;
extern void memory_type_changed(struct domain *);
@@ -101,17 +105,6 @@ int p2m_cache_flush(struct domain *d, xen_pfn_t start_mfn,
xen_pfn_t end_mfn);
/* Setup p2m RAM mapping for domain d from start-end. */
int p2m_populate_ram(struct domain *d, paddr_t start, paddr_t end);
-/* Map MMIO regions in the p2m: start_gfn and nr_mfns describe the range
- * in the guest physical address space to map, starting from the machine
- * frame number mfn. */
-int map_mmio_regions(struct domain *d,
- unsigned long start_gfn,
- unsigned long nr_mfns,
- unsigned long mfn);
-int unmap_mmio_regions(struct domain *d,
- unsigned long start_gfn,
- unsigned long nr_mfns,
- unsigned long mfn);
int guest_physmap_add_entry(struct domain *d,
unsigned long gfn,
diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h
index 2a128ed..39f235d 100644
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -29,21 +29,10 @@
#include <xen/config.h>
#include <xen/paging.h>
+#include <xen/p2m-common.h>
#include <asm/mem_sharing.h>
#include <asm/page.h> /* for pagetable_t */
-/* Map MMIO regions in the p2m: start_gfn and nr describe the range in
- * the guest physical address space to map, starting from the machine
- * frame number mfn. */
-int map_mmio_regions(struct domain *d,
- unsigned long start_gfn,
- unsigned long nr,
- unsigned long mfn);
-int unmap_mmio_regions(struct domain *d,
- unsigned long start_gfn,
- unsigned long nr,
- unsigned long mfn);
-
extern bool_t opt_hap_1gb, opt_hap_2mb;
/*
diff --git a/xen/include/xen/p2m-common.h b/xen/include/xen/p2m-common.h
new file mode 100644
index 0000000..9f1b771
--- /dev/null
+++ b/xen/include/xen/p2m-common.h
@@ -0,0 +1,16 @@
+#ifndef _XEN_P2M_COMMON_H
+#define _XEN_P2M_COMMON_H
+
+/* Map MMIO regions in the p2m: start_gfn and nr describe the range in
+ * * the guest physical address space to map, starting from the machine
+ * * frame number mfn. */
+int map_mmio_regions(struct domain *d,
+ unsigned long start_gfn,
+ unsigned long nr,
+ unsigned long mfn);
+int unmap_mmio_regions(struct domain *d,
+ unsigned long start_gfn,
+ unsigned long nr,
+ unsigned long mfn);
+
+#endif /* _XEN_P2M_COMMON_H */
--
2.1.0
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