From: Ian Campbell <ian.campbell@citrix.com>
Date: Wed, 17 Oct 2012 20:37:49 +0000 (-0700)
Subject: xen: add pages parameter to xen_remap_domain_mfn_range
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9a032e393a8bc888a9b0c898cbdb9db2cee7b536;p=linux-beck.git

xen: add pages parameter to xen_remap_domain_mfn_range

Also introduce xen_unmap_domain_mfn_range. These are the parts of
Mukesh's "xen/pvh: Implement MMU changes for PVH" which are also
needed as a baseline for ARM privcmd support.

The original patch was:

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

This derivative is also:

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 6226c99729b9..0f6386a5b437 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2479,7 +2479,9 @@ static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token,
 int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
 			       unsigned long addr,
 			       unsigned long mfn, int nr,
-			       pgprot_t prot, unsigned domid)
+			       pgprot_t prot, unsigned domid,
+			       struct page **pages)
+
 {
 	struct remap_data rmd;
 	struct mmu_update mmu_update[REMAP_BATCH_SIZE];
@@ -2523,3 +2525,14 @@ out:
 	return err;
 }
 EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);
+
+/* Returns: 0 success */
+int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
+			       int numpgs, struct page **pages)
+{
+	if (!pages || !xen_feature(XENFEAT_auto_translated_physmap))
+		return 0;
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range);
diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c
index 8adb9cc267f9..b612267a8cb6 100644
--- a/drivers/xen/privcmd.c
+++ b/drivers/xen/privcmd.c
@@ -178,7 +178,7 @@ static int mmap_mfn_range(void *data, void *state)
 					msg->va & PAGE_MASK,
 					msg->mfn, msg->npages,
 					vma->vm_page_prot,
-					st->domain);
+					st->domain, NULL);
 	if (rc < 0)
 		return rc;
 
@@ -267,7 +267,8 @@ static int mmap_batch_fn(void *data, void *state)
 	int ret;
 
 	ret = xen_remap_domain_mfn_range(st->vma, st->va & PAGE_MASK, *mfnp, 1,
-					 st->vma->vm_page_prot, st->domain);
+					 st->vma->vm_page_prot, st->domain,
+					 NULL);
 
 	/* Store error code for second pass. */
 	*(st->err++) = ret;
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index 6a198e46ab6e..990b43e441e6 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -27,6 +27,9 @@ struct vm_area_struct;
 int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
 			       unsigned long addr,
 			       unsigned long mfn, int nr,
-			       pgprot_t prot, unsigned domid);
+			       pgprot_t prot, unsigned domid,
+			       struct page **pages);
+int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
+			       int numpgs, struct page **pages);
 
 #endif /* INCLUDE_XEN_OPS_H */