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# HG changeset patch
# User awilliam@xenbuild.aw
# Node ID 5674e4fe8f0225eece0770b5af334795ba1924e0
# Parent 40959bc0a269ee71ba2378e7ffbff31c187a78d2
[IA64] GNTMAP_readonly support linux part

add read only mapping support.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
---
linux-2.6-xen-sparse/arch/ia64/xen/hypervisor.c | 14 ++++++--------
linux-2.6-xen-sparse/include/asm-ia64/hypercall.h | 4 ++--
2 files changed, 8 insertions(+), 10 deletions(-)

diff -r 40959bc0a269 -r 5674e4fe8f02 linux-2.6-xen-sparse/arch/ia64/xen/hypervisor.c
--- a/linux-2.6-xen-sparse/arch/ia64/xen/hypervisor.c Wed May 24 10:56:47 2006 -0600
+++ b/linux-2.6-xen-sparse/arch/ia64/xen/hypervisor.c Wed May 24 10:59:28 2006 -0600
@@ -314,12 +314,6 @@ gnttab_map_grant_ref_pre(struct gnttab_m
uint32_t flags;

flags = uop->flags;
- if (flags & GNTMAP_readonly) {
-#if 0
- xprintd("GNTMAP_readonly is not supported yet\n");
-#endif
- flags &= ~GNTMAP_readonly;
- }

if (flags & GNTMAP_host_map) {
if (flags & GNTMAP_application_map) {
@@ -517,6 +511,7 @@ xen_ia64_privcmd_entry_mmap(struct vm_ar
int error = 0;
struct xen_ia64_privcmd_entry* entry = &privcmd_range->entries[i];
unsigned long gpfn;
+ unsigned long flags;

BUG_ON((addr & ~PAGE_MASK) != 0);
BUG_ON(mfn == INVALID_MFN);
@@ -527,8 +522,11 @@ xen_ia64_privcmd_entry_mmap(struct vm_ar
}
gpfn = (privcmd_range->res->start >> PAGE_SHIFT) + i;

- error = HYPERVISOR_add_physmap(gpfn, mfn, 0/* prot:XXX */,
- domid);
+ flags = ASSIGN_writable;
+ if (pgprot_val(prot) == PROT_READ) {
+ flags = ASSIGN_readonly;
+ }
+ error = HYPERVISOR_add_physmap(gpfn, mfn, flags, domid);
if (error != 0) {
goto out;
}
diff -r 40959bc0a269 -r 5674e4fe8f02 linux-2.6-xen-sparse/include/asm-ia64/hypercall.h
--- a/linux-2.6-xen-sparse/include/asm-ia64/hypercall.h Wed May 24 10:56:47 2006 -0600
+++ b/linux-2.6-xen-sparse/include/asm-ia64/hypercall.h Wed May 24 10:59:28 2006 -0600
@@ -494,7 +494,7 @@ HYPERVISOR_zap_physmap(unsigned long gpf

static inline unsigned long
__HYPERVISOR_add_physmap(unsigned long gpfn, unsigned long mfn,
- unsigned int flags, domid_t domid)
+ unsigned long flags, domid_t domid)
{
return _hypercall_imm4(unsigned long, ia64_dom0vp_op,
IA64_DOM0VP_add_physmap, gpfn, mfn, flags,
@@ -503,7 +503,7 @@ __HYPERVISOR_add_physmap(unsigned long g

static inline unsigned long
HYPERVISOR_add_physmap(unsigned long gpfn, unsigned long mfn,
- unsigned int flags, domid_t domid)
+ unsigned long flags, domid_t domid)
{
unsigned long ret = 0;
BUG_ON(!running_on_xen);//XXX

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