# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID 2a9c6a23cd1292e9ed361e33d640ce84a6fbdb53
# Parent f4d382795e57b926cd82256bcb3a74c539731796
[XEN] The VIO rewrite
Once you figure it all out, its time to do a rewrite, lots of code I
thougth I needed is now removed and less PPC specific code now exists.
This patch uses the MEMORY_HOTPLUG system to add a region to the
Kernel Linear Mapping that will be used exclusively to map in
Granted/Foreign pages. This creates "struct page" objects in Linux
which are necessary to perform VIO operations. When one of these
pages are grant_mapped the pfn2mfn() translation in Xen is updated to
reflect the association and the subsequent H_ENTER() from the domain
will contain the correct mapping.
Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
---
arch/powerpc/platforms/xen/balloon.c | 20 +--
arch/powerpc/platforms/xen/gnttab.c | 186 +++++++++++++++++++++++--------
arch/powerpc/platforms/xen/setup.h | 4
arch/powerpc/platforms/xen/util.c | 18 +--
drivers/xen/blkback/blkback.c | 18 ---
drivers/xen/blkback/interface.c | 1
drivers/xen/netback/interface.c | 3
drivers/xen/netback/netback.c | 45 -------
drivers/xen/netfront/netfront.c | 7 +
drivers/xen/tpmback/interface.c | 1
include/asm-powerpc/xen/asm/hypervisor.h | 2
include/xen/driver_util.h | 5
include/xen/gnttab.h | 4
13 files changed, 173 insertions(+), 141 deletions(-)
diff -r f4d382795e57 -r 2a9c6a23cd12 arch/powerpc/platforms/xen/balloon.c
--- a/arch/powerpc/platforms/xen/balloon.c Wed Oct 25 17:22:54 2006 -0400
+++ b/arch/powerpc/platforms/xen/balloon.c Fri Nov 03 16:50:22 2006 -0500
@@ -1,6 +1,7 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <asm/hypervisor.h>
+#include "setup.h"
/*
* FIXME: Port balloon driver, if ever
@@ -9,18 +10,23 @@ struct page **alloc_empty_pages_and_page
struct page **alloc_empty_pages_and_pagevec(int nr_pages)
{
struct page *page, **pagevec;
- void *vaddr;
int i;
+ int scrub = 0;
pagevec = kmalloc(sizeof(*pagevec) * nr_pages, GFP_KERNEL);
if (pagevec == NULL)
return NULL;
for (i = 0; i < nr_pages; i++) {
- page = alloc_page(GFP_KERNEL);
+ page = alloc_grant_page();
pagevec[i] = page;
- vaddr = page_address(page);
- scrub_pages(vaddr, 1);
+
+ if (scrub) {
+ void *vaddr;
+
+ vaddr = page_address(page);
+ scrub_pages(vaddr, 1);
+ }
}
return pagevec;
@@ -28,17 +34,13 @@ struct page **alloc_empty_pages_and_page
void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages)
{
- int arch_is_foreign_page(struct page *page);
- struct page *page;
int i;
if (pagevec == NULL)
return;
for (i = 0; i < nr_pages; i++) {
- page = pagevec[i];
- if (!arch_is_foreign_page(page))
- __free_page(page);
+ free_grant_page(pagevec[i]);
}
kfree(pagevec);
diff -r f4d382795e57 -r 2a9c6a23cd12 arch/powerpc/platforms/xen/gnttab.c
--- a/arch/powerpc/platforms/xen/gnttab.c Wed Oct 25 17:22:54 2006 -0400
+++ b/arch/powerpc/platforms/xen/gnttab.c Fri Nov 03 16:50:22 2006 -0500
@@ -2,6 +2,7 @@
#include <linux/config.h>
#include <linux/vmalloc.h>
#include <linux/memory_hotplug.h>
+#include <linux/mempool.h>
#include <xen/gnttab.h>
#include <asm/hypervisor.h>
#include <xen/interface/grant_table.h>
@@ -22,8 +23,37 @@
#define DBG(fmt...)
#endif
+struct address_space xen_foreign_dummy_mapping;
+
static ulong foreign_map_base;
static ulong foreign_map_end;
+
+
+/* hijack _mapcount */
+static inline int gnt_mapcount(struct page *page)
+{
+ return atomic_read(&(page)->_mapcount) + 1;
+}
+
+static inline int gnt_map(struct page *page)
+{
+ /* return true is transition from -1 to 0 */
+ return atomic_inc_and_test(&page->_mapcount);
+}
+
+static inline int gnt_unmap(struct page *page)
+{
+ int val;
+
+ val = atomic_dec_return(&page->_mapcount);
+ if (val < -1) {
+ atomic_inc(&page->_mapcount);
+ printk(KERN_EMERG "%s: %d\n", __func__, val);
+ }
+
+ return (val == -1);
+}
+
static long map_to_linear(ulong paddr)
{
@@ -136,21 +166,20 @@ static void gnttab_pre_unmap_grant_ref(
int i;
ulong ea;
unsigned long dummy1, dummy2;
+ ulong flags;
+
+ /* paranoia */
+ local_irq_save(flags);
for (i = 0 ; i < count; i++) {
struct page *page;
- ea = unmap[i].host_addr;
+ ea = (ulong)__va(unmap[i].host_addr);
page = virt_to_page(ea);
-
- /* Unfortunately, there is no put_page_testone() like
- * put_page_testzero(). The Linear Map starts all
- * pages with a count of 1, so there may be SMP issues
- * here. */
-
- put_page(page);
- if (page_count(page) > 1) {
- DBG("%s: skip: 0x%lx\n", __func__, ea);
+
+ if (!gnt_unmap(page)) {
+ DBG("%s[0x%x]: skip: 0x%lx, mapcount 0x%x\n",
+ __func__, i, ea, gnt_mapcount(page));
continue;
}
slot = find_map_slot(ea);
@@ -160,10 +189,11 @@ static void gnttab_pre_unmap_grant_ref(
continue;
}
- DBG("%s: 0x%lx: page count: 0x%x\n",
- __func__, ea, page_count(virt_to_page(ea)));
+ DBG("%s[0x%x]: 0x%lx: mapcount: 0x%x\n",
+ __func__, i, ea, gnt_mapcount(page));
plpar_pte_remove(0, slot, 0, &dummy1, &dummy2);
}
+ local_irq_restore(flags);
}
static void gnttab_post_map_grant_ref(
@@ -171,21 +201,25 @@ static void gnttab_post_map_grant_ref(
{
int i;
long slot;
+ ulong flags;
+
+ /* paranoia */
+ local_irq_save(flags);
for (i = 0 ; i < count; i++) {
- ulong pa = map[i].dev_bus_addr;
+ ulong pa = map[i].host_addr;
struct page *page;
+ if (map[i].status != GNTST_okay) {
+ printk(KERN_EMERG "%s: status, skip\n", __func__);
+ continue;
+ }
+
BUG_ON(pa < foreign_map_base || pa >= foreign_map_end);
- /* ??? store the slot somewhere ??? */
- map[i].host_addr = (ulong)__va(pa);
- page = virt_to_page(map[i].host_addr);
-
- DBG("%s: 0x%lx: 0x%x\n",
- __func__, pa, page_count(page));
-
- if (page_count(page) == 1) {
+ page = virt_to_page(__va(pa));
+
+ if (gnt_map(page)) {
#ifdef DEBUG
/* we need to get smarted than this */
slot = find_map_slot((ulong)__va(pa));
@@ -195,11 +229,15 @@ static void gnttab_post_map_grant_ref(
}
#endif
slot = map_to_linear(pa);
+ DBG("%s[0x%x]: 0x%lx, mapcount:0x%x\n",
+ __func__, i, pa, gnt_mapcount(page));
+
} else {
- DBG("%s: skip 0x%lx\n", __func__, pa);
- }
- get_page(page);
- }
+ DBG("%s[0x%x] skip 0x%lx, mapcount:0x%x\n",
+ __func__, i, pa, gnt_mapcount(page));
+ }
+ }
+ local_irq_restore(flags);
}
int HYPERVISOR_grant_table_op(unsigned int cmd, void *op, unsigned int count)
@@ -257,7 +295,7 @@ int HYPERVISOR_grant_table_op(unsigned i
}
EXPORT_SYMBOL(HYPERVISOR_grant_table_op);
-static ulong setup_grant_maps(void)
+static ulong find_grant_maps(void)
{
struct device_node *xen;
u64 *gm;
@@ -282,7 +320,7 @@ static ulong setup_grant_maps(void)
if (!is_initial_xendomain()) {
printk("OF: /xen/foreign-map not present\n");
_gm[0] = expect;
- _gm[1] = 1UL << expect;
+ _gm[1] = 1024;
gm = _gm;
} else
panic("OF: /xen/foreign-map must be present\n");
@@ -298,11 +336,8 @@ static ulong setup_grant_maps(void)
return gm[1];
}
-static int add_grant_pages(ulong pfn, ulong pgs)
-{
- struct zone *zone;
- struct pglist_data *pgdata;
- int nid;
+static void setup_foreign_segment(void)
+{
extern int *slb_miss_kernel_load_xen_nop;
ulong iaddr = (ulong)slb_miss_kernel_load_xen_nop;
@@ -310,36 +345,97 @@ static int add_grant_pages(ulong pfn, ul
* the branch with a NOP to turn the logic on */
*slb_miss_kernel_load_xen_nop = 0x60000000;
flush_icache_range(iaddr, iaddr + 4);
+}
+
+int arch_gnttab_suspend(volatile void __iomem *shared)
+{
+ iounmap(shared);
+ return 0;
+}
+
+static mempool_t *grant_pool;
+struct page *alloc_grant_page(void)
+{
+ void *va;
+
+ va = mempool_alloc(grant_pool, GFP_KERNEL);
+
+ return virt_to_page(va);
+}
+
+void free_grant_page(struct page *page)
+{
+ mempool_free(pfn_to_kaddr(page_to_pfn(page)), grant_pool);
+}
+
+static void *gp_alloc(gfp_t gfp_mask, void *pool_data)
+{
+ static ulong count;
+ ulong max = (ulong)pool_data;
+ void *ret = NULL;
+
+ if (count < max) {
+ ulong pfn;
+
+ pfn = (foreign_map_base >> PAGE_SHIFT) + count;
+ ret = pfn_to_kaddr(pfn);
+ ++count;
+ }
+ return ret;
+}
+
+static void gp_free(void *element, void *pool_data)
+{
+ BUG();
+}
+
+static void setup_grant_area(void)
+{
+ ulong pgs;
+ int err;
+ struct zone *zone;
+ struct pglist_data *pgdata;
+ int nid;
+
+ pgs = find_grant_maps();
+ setup_foreign_segment();
/* add pages to the zone */
nid = 0;
pgdata = NODE_DATA(nid);
zone = pgdata->node_zones;
- /* add pages to the zone */
- return __add_pages(zone, pfn, pgs);
-}
-
-int arch_gnttab_suspend(volatile void __iomem *shared)
-{
- iounmap(shared);
- return 0;
+ err = __add_pages(zone, foreign_map_base >> PAGE_SHIFT, pgs);
+
+ if (err < 0) {
+ printk(KERN_EMERG "%s: add_pages(0x%lx, 0x%lx) = %d\n",
+ __func__, foreign_map_base >> PAGE_SHIFT, pgs, err);
+ BUG();
+ }
+
+ /* create a memory pool to manage these pages */
+ grant_pool = mempool_create(pgs, gp_alloc, gp_free, (void *)pgs);
+ if (grant_pool == NULL) {
+ printk(KERN_EMERG "%s: mempool_create(): failed\n", __func__);
+ BUG();
+ }
}
void *arch_gnttab_map(unsigned long *frames)
{
void *shared;
ulong pa = frames[0] << PAGE_SHIFT;
- ulong pgs;
+ static int resume;
shared = ioremap(pa, PAGE_SIZE * NR_GRANT_FRAMES);
BUG_ON(shared == NULL);
printk("%s: grant table at %p\n", __func__, shared);
- pgs = setup_grant_maps();
-
- if (is_initial_xendomain())
- add_grant_pages(foreign_map_base >> PAGE_SHIFT, pgs);
+ /* no need to do the rest of this if we are resuming */
+ if (!resume)
+ setup_grant_area();
+
+ resume = 1;
return shared;
}
diff -r f4d382795e57 -r 2a9c6a23cd12 arch/powerpc/platforms/xen/setup.h
--- a/arch/powerpc/platforms/xen/setup.h Wed Oct 25 17:22:54 2006 -0400
+++ b/arch/powerpc/platforms/xen/setup.h Fri Nov 03 16:50:22 2006 -0500
@@ -21,3 +21,7 @@ static inline u64 jiffies_to_ns(unsigned
}
#define xen_guest_handle(hnd) ((hnd).p)
+
+extern struct page *alloc_grant_page(void);
+extern void free_grant_page(struct page *page);
+
diff -r f4d382795e57 -r 2a9c6a23cd12 arch/powerpc/platforms/xen/util.c
--- a/arch/powerpc/platforms/xen/util.c Wed Oct 25 17:22:54 2006 -0400
+++ b/arch/powerpc/platforms/xen/util.c Fri Nov 03 16:50:22 2006 -0500
@@ -5,16 +5,23 @@
#include <linux/vmalloc.h>
#include <asm/uaccess.h>
#include <xen/driver_util.h>
-
+#include "setup.h"
struct vm_struct *alloc_vm_area(unsigned long size)
{
struct vm_struct *area;
+ struct page *page;
+
+ page = alloc_grant_page();
+ if (page == NULL) {
+ BUG();
+ return NULL;
+ }
area = kmalloc(sizeof(*area), GFP_KERNEL);
if (area != NULL) {
area->flags = VM_MAP;//XXX
- area->addr = (void *)0xdeadcab4beeff00dULL;
+ area->addr = pfn_to_kaddr(page_to_pfn(page));
area->size = size;
area->pages = NULL; //XXX
area->nr_pages = size >> PAGE_SHIFT;
@@ -40,10 +47,3 @@ void unlock_vm_area(struct vm_struct *ar
preempt_enable();
}
EXPORT_SYMBOL_GPL(unlock_vm_area);
-
-void update_vm_area(struct vm_struct *area, struct gnttab_map_grant_ref *op)
-{
- area->phys_addr = op->dev_bus_addr;
- area->addr = __va(op->dev_bus_addr);
-}
-EXPORT_SYMBOL_GPL(update_vm_area);
diff -r f4d382795e57 -r 2a9c6a23cd12 drivers/xen/blkback/blkback.c
--- a/drivers/xen/blkback/blkback.c Wed Oct 25 17:22:54 2006 -0400
+++ b/drivers/xen/blkback/blkback.c Fri Nov 03 16:50:22 2006 -0500
@@ -98,20 +98,6 @@ static inline unsigned long vaddr(pendin
unsigned long pfn = page_to_pfn(pending_pages[vaddr_pagenr(req, seg)]);
return (unsigned long)pfn_to_kaddr(pfn);
}
-
-#ifdef CONFIG_PPC_XEN
-static inline void update_pending_pages(
- unsigned int idx, gnttab_map_grant_ref_t *mop)
-{
-#ifdef PPC_NOT_YET
- extern int arch_is_foreign_page(struct page *page);
-
- if (!arch_is_foreign_page(pending_pages[idx]))
- __free_page(pending_pages[idx]);
-#endif
- pending_pages[idx] = pfn_to_page(mop->dev_bus_addr >> PAGE_SHIFT);
-}
-#endif
#define pending_handle(_req, _seg) \
(pending_grant_handles[vaddr_pagenr(_req, _seg)])
@@ -410,13 +396,9 @@ static void dispatch_rw_block_io(blkif_t
}
pending_handle(pending_req, i) = map[i].handle;
-#ifdef CONFIG_PPC_XEN
- update_pending_pages(vaddr_pagenr(pending_req, i), &map[i]);
-#else
set_phys_to_machine(__pa(vaddr(
pending_req, i)) >> PAGE_SHIFT,
FOREIGN_FRAME(map[i].dev_bus_addr >> PAGE_SHIFT));
-#endif
seg[i].buf = map[i].dev_bus_addr |
(req->seg[i].first_sect << 9);
}
diff -r f4d382795e57 -r 2a9c6a23cd12 drivers/xen/blkback/interface.c
--- a/drivers/xen/blkback/interface.c Wed Oct 25 17:22:54 2006 -0400
+++ b/drivers/xen/blkback/interface.c Fri Nov 03 16:50:22 2006 -0500
@@ -65,7 +65,6 @@ static int map_frontend_page(blkif_t *bl
lock_vm_area(blkif->blk_ring_area);
ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1);
- update_vm_area(blkif->blk_ring_area, &op);
unlock_vm_area(blkif->blk_ring_area);
BUG_ON(ret);
diff -r f4d382795e57 -r 2a9c6a23cd12 drivers/xen/netback/interface.c
--- a/drivers/xen/netback/interface.c Wed Oct 25 17:22:54 2006 -0400
+++ b/drivers/xen/netback/interface.c Fri Nov 03 16:50:22 2006 -0500
@@ -209,7 +209,6 @@ static int map_frontend_pages(
lock_vm_area(netif->tx_comms_area);
ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1);
- update_vm_area(netif->tx_comms_area, &op);
unlock_vm_area(netif->tx_comms_area);
BUG_ON(ret);
@@ -226,8 +225,6 @@ static int map_frontend_pages(
lock_vm_area(netif->rx_comms_area);
ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1);
- update_vm_area(netif->rx_comms_area, &op);
- unlock_vm_area(netif->rx_comms_area);
BUG_ON(ret);
if (op.status) {
diff -r f4d382795e57 -r 2a9c6a23cd12 drivers/xen/netback/netback.c
--- a/drivers/xen/netback/netback.c Wed Oct 25 17:22:54 2006 -0400
+++ b/drivers/xen/netback/netback.c Fri Nov 03 16:50:22 2006 -0500
@@ -76,39 +76,6 @@ static inline unsigned long idx_to_kaddr
return (unsigned long)pfn_to_kaddr(page_to_pfn(mmap_pages[idx]));
}
-#ifdef CONFIG_PPC_XEN
-
-struct address_space xen_foreign_dummy_mapping;
-
-static inline void update_mmap_pages(
- unsigned int idx, gnttab_map_grant_ref_t *mop)
-{
- struct page *p;
-#ifdef PPC_NOT_YET
- struct page *cp = mmap_pages[idx];
- extern int arch_is_foreign_page(struct page *page);
-
- if (arch_is_foreign_page(cp)) {
- printk(KERN_EMERG "%s foreign: %p, 0x%x\n",
- __func__, page_address(cp), page_count(cp));
- } else {
- printk(KERN_EMERG "%s local: %p, 0x%x\n",
- __func__, page_address(cp), page_count(cp));
- // __free_page(mmap_pages[idx]);
- }
-
-#endif
- p = pfn_to_page(mop->dev_bus_addr >> PAGE_SHIFT);
-
- DPRINTK(KERN_EMERG "%s insert[%d]: 0x%lx, 0x%x\n",
- __func__, idx, __va(mop->dev_bus_addr), page_count(p));
-
- SetPageForeign(p, netif_page_release);
- p->index = idx;
- mmap_pages[idx] = p;
-}
-#endif
-
#define PKT_PROT_LEN 64
static struct {
@@ -990,13 +957,9 @@ static int netbk_tx_check_mop(struct sk_
pending_ring[MASK_PEND_IDX(pending_prod++)] = pending_idx;
netif_put(netif);
} else {
-#ifdef CONFIG_PPC_XEN
- update_mmap_pages(pending_idx, mop);
-#else
set_phys_to_machine(
__pa(idx_to_kaddr(pending_idx)) >> PAGE_SHIFT,
FOREIGN_FRAME(mop->dev_bus_addr >> PAGE_SHIFT));
-#endif
grant_tx_handle[pending_idx] = mop->handle;
}
@@ -1011,13 +974,9 @@ static int netbk_tx_check_mop(struct sk_
/* Check error status: if okay then remember grant handle. */
newerr = (++mop)->status;
if (likely(!newerr)) {
-#ifdef CONFIG_PPC_XEN
- update_mmap_pages(pending_idx, mop);
-#else
set_phys_to_machine(
__pa(idx_to_kaddr(pending_idx))>>PAGE_SHIFT,
FOREIGN_FRAME(mop->dev_bus_addr>>PAGE_SHIFT));
-#endif
grant_tx_handle[pending_idx] = mop->handle;
/* Had a previous error? Invalidate this fragment. */
if (unlikely(err))
@@ -1379,10 +1338,6 @@ static void netif_page_release(struct pa
{
/* Ready for next use. */
init_page_count(page);
-#ifdef CONFIG_PPC_XEN
- /* we need the count to be 2 so the unmap occurs */
- get_page(page);
-#endif
netif_idx_release(page->index);
}
diff -r f4d382795e57 -r 2a9c6a23cd12 drivers/xen/netfront/netfront.c
--- a/drivers/xen/netfront/netfront.c Wed Oct 25 17:22:54 2006 -0400
+++ b/drivers/xen/netfront/netfront.c Fri Nov 03 16:50:22 2006 -0500
@@ -655,6 +655,13 @@ static void network_tx_buf_gc(struct net
"domain.\n");
BUG();
}
+ if ((ulong)skb < 0xc000000000000000ULL) {
+ printk(KERN_EMERG "%s: bad skb: %p id: %d "
+ "status: 0x%x\n", __func__,
+ skb, id, txrsp->status);
+ continue;
+// asm volatile(".long 0x200;nop");
+ }
gnttab_end_foreign_access_ref(
np->grant_tx_ref[id], GNTMAP_readonly);
gnttab_release_grant_reference(
diff -r f4d382795e57 -r 2a9c6a23cd12 drivers/xen/tpmback/interface.c
--- a/drivers/xen/tpmback/interface.c Wed Oct 25 17:22:54 2006 -0400
+++ b/drivers/xen/tpmback/interface.c Fri Nov 03 16:50:22 2006 -0500
@@ -82,7 +82,6 @@ static int map_frontend_page(tpmif_t *tp
lock_vm_area(tpmif->tx_area);
ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1);
- update_vm_area(tpmif->tx_area, op);
unlock_vm_area(tpmif->tx_area);
BUG_ON(ret);
diff -r f4d382795e57 -r 2a9c6a23cd12 include/asm-powerpc/xen/asm/hypervisor.h
--- a/include/asm-powerpc/xen/asm/hypervisor.h Wed Oct 25 17:22:54 2006 -0400
+++ b/include/asm-powerpc/xen/asm/hypervisor.h Fri Nov 03 16:50:22 2006 -0500
@@ -226,7 +226,7 @@ MULTI_update_va_mapping_otherdomain(
}
#define INVALID_P2M_ENTRY (~0UL)
-#define FOREIGN_FRAME(m) (m)
+#define FOREIGN_FRAME(m) (INVALID_P2M_ENTRY)
static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
{
if (pfn != mfn && mfn != INVALID_P2M_ENTRY)
diff -r f4d382795e57 -r 2a9c6a23cd12 include/xen/driver_util.h
--- a/include/xen/driver_util.h Wed Oct 25 17:22:54 2006 -0400
+++ b/include/xen/driver_util.h Fri Nov 03 16:50:22 2006 -0500
@@ -10,11 +10,6 @@
/* Allocate/destroy a 'vmalloc' VM area. */
extern struct vm_struct *alloc_vm_area(unsigned long size);
extern void free_vm_area(struct vm_struct *area);
-#ifdef CONFIG_PPC_XEN
-extern void update_vm_area(struct vm_struct *area, struct gnttab_map_grant_ref
*op);
-#else
-#define update_vm_area(a,o)
-#endif
/* Lock an area so that PTEs are accessible in the current address space. */
extern void lock_vm_area(struct vm_struct *area);
diff -r f4d382795e57 -r 2a9c6a23cd12 include/xen/gnttab.h
--- a/include/xen/gnttab.h Wed Oct 25 17:22:54 2006 -0400
+++ b/include/xen/gnttab.h Fri Nov 03 16:50:22 2006 -0500
@@ -123,10 +123,8 @@ gnttab_set_map_op(struct gnttab_map_gran
{
if (flags & GNTMAP_contains_pte)
map->host_addr = addr;
-#ifndef CONFIG_PPC_XEN
else if (xen_feature(XENFEAT_auto_translated_physmap))
map->host_addr = __pa(addr);
-#endif
else
map->host_addr = addr;
@@ -141,10 +139,8 @@ gnttab_set_unmap_op(struct gnttab_unmap_
{
if (flags & GNTMAP_contains_pte)
unmap->host_addr = addr;
-#ifndef CONFIG_PPC_XEN
else if (xen_feature(XENFEAT_auto_translated_physmap))
unmap->host_addr = __pa(addr);
-#endif
else
unmap->host_addr = addr;
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