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authorPaul Durrant <paul.durrant@citrix.com>2017-11-03 20:04:11 +0300
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-11-03 23:53:53 +0300
commitec4001c3f29ebb3d4147aaec7be9c687ddadb7c8 (patch)
tree4f7120b9788e6830cb4bc70b0079ebf5bec46b34 /include/xen
parent773aaadcd474d0a4f85915787118891d47b60983 (diff)
downloadlinux-ec4001c3f29ebb3d4147aaec7be9c687ddadb7c8.tar.xz
xen: support priv-mapping in an HVM tools domain
If the domain has XENFEAT_auto_translated_physmap then use of the PV- specific HYPERVISOR_mmu_update hypercall is clearly incorrect. This patch adds checks in xen_remap_domain_gfn_array() and xen_unmap_domain_gfn_array() which call through to the approprate xlate_mmu function if the feature is present. A check is also added to xen_remap_domain_gfn_range() to fail with -EOPNOTSUPP since this should not be used in an HVM tools domain. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'include/xen')
-rw-r--r--include/xen/xen-ops.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index 09072271f122..c278b21cad39 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -104,6 +104,8 @@ int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
struct page **pages);
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
int numpgs, struct page **pages);
+
+#ifdef CONFIG_XEN_AUTO_XLATE
int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
@@ -112,6 +114,28 @@ int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
struct page **pages);
int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
int nr, struct page **pages);
+#else
+/*
+ * These two functions are called from arch/x86/xen/mmu.c and so stubs
+ * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
+ */
+static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
+ unsigned long addr,
+ xen_pfn_t *gfn, int nr,
+ int *err_ptr, pgprot_t prot,
+ unsigned int domid,
+ struct page **pages)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
+ int nr, struct page **pages)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
unsigned long nr_grant_frames);