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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [IA64] Widen page counts and domain pointer
# HG changeset patch
# User Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
# Date 1233281564 -32400
# Node ID 971d2d5cb5cb32b958530f5e43cca221883af0b2
# Parent 77393d4de7773dac5cc189fd396a71a8fc265978
[IA64] Widen page counts and domain pointer
This is ia64 counter part of 19089:39517e863cc8.
This patch is preliminary for removing xenheap.
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
xen/arch/ia64/xen/machine_kexec.c | 1
xen/arch/ia64/xen/mm.c | 36 +++++++--------
xen/arch/ia64/xen/xensetup.c | 13 -----
xen/include/asm-ia64/mm.h | 87 ++++++++++++++++++--------------------
4 files changed, 61 insertions(+), 76 deletions(-)
diff -r 77393d4de777 -r 971d2d5cb5cb xen/arch/ia64/xen/machine_kexec.c
--- a/xen/arch/ia64/xen/machine_kexec.c Fri Jan 30 11:12:29 2009 +0900
+++ b/xen/arch/ia64/xen/machine_kexec.c Fri Jan 30 11:12:44 2009 +0900
@@ -200,7 +200,6 @@ void arch_crash_save_vmcoreinfo(void)
VMCOREINFO_SYMBOL(dom_io);
VMCOREINFO_SYMBOL(xen_pstart);
VMCOREINFO_SYMBOL(frametable_pg_dir);
- VMCOREINFO_SYMBOL_ALIAS(xen_heap_start, xen_pickle_offset);
}
/*
diff -r 77393d4de777 -r 971d2d5cb5cb xen/arch/ia64/xen/mm.c
--- a/xen/arch/ia64/xen/mm.c Fri Jan 30 11:12:29 2009 +0900
+++ b/xen/arch/ia64/xen/mm.c Fri Jan 30 11:12:44 2009 +0900
@@ -1261,17 +1261,18 @@ adjust_page_count_info(struct page_info*
int ret = get_page(page, d);
BUG_ON(ret == 0);
} else {
- u64 x, nx, y;
-
- y = *((u64*)&page->count_info);
+ unsigned long x, nx, y;
+
+ y = page->count_info;
do {
x = y;
nx = x + 1;
BUG_ON((x >> 32) != 0);
BUG_ON((nx & PGC_count_mask) != 2);
- y = cmpxchg((u64*)&page->count_info, x, nx);
+ y = cmpxchg(&page->count_info, x, nx);
} while (unlikely(y != x));
+ BUG_ON(page_get_owner(page) != NULL);
}
}
@@ -2748,7 +2749,7 @@ steal_page(struct domain *d, struct page
#if 0 /* if big endian */
# error "implement big endian version of steal_page()"
#endif
- u32 x, y;
+ unsigned long x, y;
if (page_get_owner(page) != d) {
gdprintk(XENLOG_INFO, "%s d 0x%p owner 0x%p\n",
@@ -2808,7 +2809,6 @@ steal_page(struct domain *d, struct page
y = page->count_info;
do {
x = y;
- // page->count_info: untouched
if (unlikely(((x & (PGC_count_mask | PGC_allocated)) !=
(1 | PGC_allocated)))) {
@@ -2817,7 +2817,7 @@ steal_page(struct domain *d, struct page
gdprintk(XENLOG_INFO, "gnttab_transfer: "
"Bad page %p: ed=%p(%u), "
"sd=%p,"
- " caf=%016x, taf=%" PRtype_info
+ " caf=%016lx, taf=%" PRtype_info
" memflags 0x%x\n",
(void *) page_to_mfn(page),
d, d->domain_id,
@@ -2829,7 +2829,7 @@ steal_page(struct domain *d, struct page
gdprintk(XENLOG_WARNING, "gnttab_transfer: "
"Bad page %p: ed=%p(%u), "
"sd=%p(%u),"
- " caf=%016x, taf=%" PRtype_info
+ " caf=%016lx, taf=%" PRtype_info
" memflags 0x%x\n",
(void *) page_to_mfn(page),
d, d->domain_id,
@@ -2864,7 +2864,7 @@ steal_page(struct domain *d, struct page
fail:
spin_unlock(&d->page_alloc_lock);
- MEM_LOG("Bad page %p: ed=%p(%u), sd=%p, caf=%08x, taf=%" PRtype_info,
+ MEM_LOG("Bad page %p: ed=%p(%u), sd=%p, caf=%016lx, taf=%" PRtype_info,
(void *)page_to_mfn(page), d, d->domain_id,
page_get_owner(page), page->count_info, page->u.inuse.type_info);
return -1;
@@ -3055,11 +3055,11 @@ void domain_cache_flush (struct domain *
//printk ("domain_cache_flush: %d %d pages\n", d->domain_id, nbr_page);
}
-static void free_page_type(struct page_info *page, u32 type)
-{
-}
-
-static int alloc_page_type(struct page_info *page, u32 type)
+static void free_page_type(struct page_info *page, unsigned long type)
+{
+}
+
+static int alloc_page_type(struct page_info *page, unsigned long type)
{
return 1;
}
@@ -3150,7 +3150,7 @@ static int get_page_from_pagenr(unsigned
}
-int get_page_type(struct page_info *page, u32 type)
+int get_page_type(struct page_info *page, unsigned long type)
{
u64 nx, x, y = page->u.inuse.type_info;
@@ -3198,7 +3198,7 @@ int get_page_type(struct page_info *page
{
if ( ((x & PGT_type_mask) != PGT_l2_page_table) ||
(type != PGT_l1_page_table) )
- MEM_LOG("Bad type (saw %08lx != exp %08x) "
+ MEM_LOG("Bad type (saw %08lx != exp %08lx) "
"for mfn %016lx (pfn %016lx)",
x, type, page_to_mfn(page),
get_gpfn_from_mfn(page_to_mfn(page)));
@@ -3219,8 +3219,8 @@ int get_page_type(struct page_info *page
/* Try to validate page type; drop the new reference on failure. */
if ( unlikely(!alloc_page_type(page, type)) )
{
- MEM_LOG("Error while validating mfn %lx (pfn %lx) for type %08x"
- ": caf=%08x taf=%" PRtype_info,
+ MEM_LOG("Error while validating mfn %lx (pfn %lx) for type %08lx"
+ ": caf=%016lx taf=%" PRtype_info,
page_to_mfn(page), get_gpfn_from_mfn(page_to_mfn(page)),
type, page->count_info, page->u.inuse.type_info);
/* Noone else can get a reference. We hold the only ref. */
diff -r 77393d4de777 -r 971d2d5cb5cb xen/arch/ia64/xen/xensetup.c
--- a/xen/arch/ia64/xen/xensetup.c Fri Jan 30 11:12:29 2009 +0900
+++ b/xen/arch/ia64/xen/xensetup.c Fri Jan 30 11:12:44 2009 +0900
@@ -74,7 +74,6 @@ boolean_param("xencons_poll", opt_xencon
unsigned long xenheap_size = XENHEAP_DEFAULT_SIZE;
unsigned long xen_pstart;
-void *xen_pickle_offset __read_mostly;
static void __init parse_xenheap_megabytes(char *s)
{
@@ -84,9 +83,7 @@ static void __init parse_xenheap_megabyt
if (megabytes < XENHEAP_MEGABYTES_MIN)
megabytes = XENHEAP_MEGABYTES_MIN;
-#define XENHEAP_MEGABYTES_MAX 4096UL /* need more? If so,
- __pickle()/__unpickle() must be
- revised. */
+#define XENHEAP_MEGABYTES_MAX 4096UL /* need more? */
if (megabytes > XENHEAP_MEGABYTES_MAX)
megabytes = XENHEAP_MEGABYTES_MAX;
@@ -530,14 +527,6 @@ skip_move:
printk("find_memory: efi_memmap_walk returns max_page=%lx\n",max_page);
efi_print();
- /*
- * later [__init_begin, __init_end) will be freed up as xen heap
- * so that struct domain might be allocated from the init area
- * which is < xen_heap_start. so we can't simply set
- * xen_pickle_offset = xen_heap_start.
- */
- xen_pickle_offset = ia64_imva(__init_begin);
-
xen_heap_start = memguard_init(ia64_imva(&_end));
printk("Before xen_heap_start: %p\n", xen_heap_start);
xen_heap_start = __va(init_boot_allocator(__pa(xen_heap_start)));
diff -r 77393d4de777 -r 971d2d5cb5cb xen/include/asm-ia64/mm.h
--- a/xen/include/asm-ia64/mm.h Fri Jan 30 11:12:29 2009 +0900
+++ b/xen/include/asm-ia64/mm.h Fri Jan 30 11:12:44 2009 +0900
@@ -46,7 +46,7 @@ struct page_info
struct list_head list;
/* Reference count and various PGC_xxx flags and fields. */
- u32 count_info;
+ unsigned long count_info;
/* Context-dependent fields follow... */
union {
@@ -54,10 +54,10 @@ struct page_info
/* Page is in use: ((count_info & PGC_count_mask) != 0). */
struct {
/* Owner of this page (NULL if page is anonymous). */
- u32 _domain; /* pickled format */
+ unsigned long _domain; /* pickled format */
/* Type reference count and various PGT_xxx flags and fields. */
unsigned long type_info;
- } __attribute__ ((packed)) inuse;
+ } inuse;
/* Page is on a free list: ((count_info & PGC_count_mask) == 0). */
struct {
@@ -65,7 +65,7 @@ struct page_info
u32 order;
/* Mask of possibly-tainted TLBs. */
cpumask_t cpumask;
- } __attribute__ ((packed)) free;
+ } free;
} u;
@@ -86,50 +86,47 @@ struct page_info
* Still small set of flags defined by far on IA-64.
* IA-64 should make it a definition same as x86_64.
*/
+#define PG_shift(idx) (BITS_PER_LONG - (idx))
+#define PG_mask(x, idx) (x ## UL << PG_shift(idx))
+
/* The following page types are MUTUALLY EXCLUSIVE. */
-#define PGT_none (0UL<<29) /* no special uses of this page */
-#define PGT_l1_page_table (1UL<<29) /* using this page as an L1 page table?
*/
-#define PGT_l2_page_table (2UL<<29) /* using this page as an L2 page table?
*/
-#define PGT_l3_page_table (3UL<<29) /* using this page as an L3 page table?
*/
-#define PGT_l4_page_table (4UL<<29) /* using this page as an L4 page table?
*/
+#define PGT_none PG_mask(0, 3) /* no special uses of this page */
+#define PGT_l1_page_table PG_mask(1, 3) /* using as an L1 page table? */
+#define PGT_l2_page_table PG_mask(2, 3) /* using as an L2 page table? */
+#define PGT_l3_page_table PG_mask(3, 3) /* using as an L3 page table? */
+#define PGT_l4_page_table PG_mask(4, 3) /* using as an L4 page table? */
/* Value 5 reserved. See asm-x86/mm.h */
/* Value 6 reserved. See asm-x86/mm.h */
-#define PGT_writable_page (7UL<<29) /* has writable mappings of this page? */
-#define PGT_type_mask (7UL<<29) /* Bits 29-31. */
-
+#define PGT_writable_page PG_mask(7, 3) /* has writable mappings? */
+#define PGT_type_mask PG_mask(7, 3) /* Bits 29-31. */
+
+ /* Owning guest has pinned this page to its current type? */
+#define _PGT_pinned PG_shift(4)
+#define PGT_pinned PG_mask(1, 4)
/* Has this page been validated for use as its current type? */
-#define _PGT_validated 28
-#define PGT_validated (1UL<<_PGT_validated)
- /* Owning guest has pinned this page to its current type? */
-#define _PGT_pinned 27
-#define PGT_pinned (1UL<<_PGT_pinned)
-
- /* 16-bit count of uses of this frame as its current type. */
-#define PGT_count_mask ((1UL<<16)-1)
+#define _PGT_validated PG_shift(5)
+#define PGT_validated PG_mask(1, 5)
+
+ /* Count of uses of this frame as its current type. */
+#define PGT_count_width PG_shift(7)
+#define PGT_count_mask ((1UL<<PGT_count_width)-1)
/* Cleared when the owning guest 'frees' this page. */
-#define _PGC_allocated 31
-#define PGC_allocated (1UL<<_PGC_allocated)
- /* Bit 30 reserved. See asm-x86/mm.h */
- /* Bit 29 reserved. See asm-x86/mm.h */
- /* 29-bit count of references to this frame. */
-#define PGC_count_mask ((1UL<<29)-1)
+#define _PGC_allocated PG_shift(1)
+#define PGC_allocated PG_mask(1, 1)
+ /* bit PG_shift(2) reserved. See asm-x86/mm.h */
+ /* bit PG_shift(3) reserved. See asm-x86/mm.h */
+ /* PG_mask(7, 6) reserved. See asm-x86/mm.h*/
+ /* Count of references to this frame. */
+#define PGC_count_width PG_shift(6)
+#define PGC_count_mask ((1UL<<PGC_count_width)-1)
#define is_xen_heap_mfn(mfn) (((mfn) < paddr_to_pfn(xenheap_phys_end)) \
&& ((mfn) >= paddr_to_pfn(xen_pstart)))
#define is_xen_heap_page(page) is_xen_heap_mfn(page_to_mfn(page))
-extern void* xen_pickle_offset;
-#define __pickle(a) ((unsigned long)a - (unsigned long)xen_pickle_offset)
-#define __unpickle(a) (void *)(a + xen_pickle_offset)
-
-static inline struct domain *unpickle_domptr(u64 _d)
-{ return (_d == 0) ? NULL : __unpickle(_d); }
-static inline u32 pickle_domptr(struct domain *_d)
-{ return (_d == NULL) ? 0 : (u32)__pickle(_d); }
-
-#define page_get_owner(_p) (unpickle_domptr((_p)->u.inuse._domain))
-#define page_set_owner(_p, _d) ((_p)->u.inuse._domain = pickle_domptr(_d))
+#define page_get_owner(_p) ((struct domain *)(_p)->u.inuse._domain)
+#define page_set_owner(_p, _d) ((_p)->u.inuse._domain = (unsigned long)(_d))
#define XENSHARE_writable 0
#define XENSHARE_readonly 1
@@ -151,23 +148,23 @@ void add_to_domain_alloc_list(unsigned l
static inline void put_page(struct page_info *page)
{
- u32 nx, x, y = page->count_info;
+ unsigned long nx, x, y = page->count_info;
do {
- x = y;
- nx = x - 1;
+ x = y;
+ nx = x - 1;
}
while (unlikely((y = cmpxchg_rel(&page->count_info, x, nx)) != x));
if (unlikely((nx & PGC_count_mask) == 0))
- free_domheap_page(page);
+ free_domheap_page(page);
}
/* count_info and ownership are checked atomically. */
static inline int get_page(struct page_info *page,
struct domain *domain)
{
- u32 x, y = page->count_info;
+ unsigned long x, y = page->count_info;
do {
x = y;
@@ -185,7 +182,7 @@ fail:
fail:
/* if (!domain->is_dying) */ /* XXX: header inclusion hell */
gdprintk(XENLOG_INFO,
- "Error pfn %lx: rd=%p, od=%p, caf=%016x, taf=%" PRtype_info "\n",
+ "Error pfn %lx: rd=%p, od=%p, caf=%016lx, taf=%" PRtype_info "\n",
page_to_mfn(page), domain,
page_get_owner(page), y, page->u.inuse.type_info);
return 0;
@@ -194,7 +191,7 @@ int is_iomem_page(unsigned long mfn);
int is_iomem_page(unsigned long mfn);
extern void put_page_type(struct page_info *page);
-extern int get_page_type(struct page_info *page, u32 type);
+extern int get_page_type(struct page_info *page, unsigned long type);
static inline void put_page_and_type(struct page_info *page)
{
@@ -205,7 +202,7 @@ static inline void put_page_and_type(str
static inline int get_page_and_type(struct page_info *page,
struct domain *domain,
- u32 type)
+ unsigned long type)
{
int rc = get_page(page, domain);
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