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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [XEN][POWERPC] Lots of domain page managment cleanups.
# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID 43ec7afa5734a8c2d8840c01e50255d7c96f5abd
# Parent 7825169895d0652dd16f10a9186cba5b84b6933e
[XEN][POWERPC] Lots of domain page managment cleanups.
Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
Signed-off-by: Hollis Blanchard <hollisb@xxxxxxxxxx>
---
xen/arch/powerpc/domain.c | 10 +
xen/arch/powerpc/domain_build.c | 32 +++--
xen/arch/powerpc/iommu.c | 17 +--
xen/arch/powerpc/mm.c | 200 +++++++++++++++++++++++++++++-------
xen/arch/powerpc/papr/xlate.c | 4
xen/arch/powerpc/powerpc64/ppc970.c | 11 +
xen/include/asm-powerpc/domain.h | 6 -
xen/include/asm-powerpc/mm.h | 179 +++++++++++++++++++-------------
xen/include/asm-powerpc/processor.h | 3
9 files changed, 321 insertions(+), 141 deletions(-)
diff -r 7825169895d0 -r 43ec7afa5734 xen/arch/powerpc/domain.c
--- a/xen/arch/powerpc/domain.c Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/arch/powerpc/domain.c Fri Aug 25 15:28:48 2006 -0400
@@ -27,6 +27,7 @@
#include <xen/domain.h>
#include <xen/console.h>
#include <xen/shutdown.h>
+#include <xen/mm.h>
#include <asm/htab.h>
#include <asm/current.h>
#include <asm/hcalls.h>
@@ -76,6 +77,7 @@ int arch_domain_create(struct domain *d)
unsigned long rma_base;
unsigned long rma_sz;
uint htab_order;
+ uint nr_pages;
if (d->domain_id == IDLE_DOMAIN_ID) {
d->shared_info = (void *)alloc_xenheap_page();
@@ -88,11 +90,13 @@ int arch_domain_create(struct domain *d)
rma_sz = rma_size(d->arch.rma_order);
/* allocate the real mode area */
- d->max_pages = 1UL << d->arch.rma_order;
+ nr_pages = 1UL << d->arch.rma_order;
+ d->max_pages = nr_pages;
d->tot_pages = 0;
d->arch.rma_page = alloc_domheap_pages(d, d->arch.rma_order, 0);
if (NULL == d->arch.rma_page)
return 1;
+
rma_base = page_to_maddr(d->arch.rma_page);
BUG_ON(rma_base & (rma_sz - 1)); /* check alignment */
@@ -103,8 +107,8 @@ int arch_domain_create(struct domain *d)
d->shared_info = (shared_info_t *)
(rma_addr(&d->arch, RMA_SHARED_INFO) + rma_base);
- d->arch.large_page_sizes = 1;
- d->arch.large_page_shift[0] = 24; /* 16 M for 970s */
+ d->arch.large_page_sizes = cpu_large_page_orders(
+ d->arch.large_page_order, ARRAY_SIZE(d->arch.large_page_order));
/* FIXME: we need to the the maximum addressible memory for this
* domain to calculate this correctly. It should probably be set
diff -r 7825169895d0 -r 43ec7afa5734 xen/arch/powerpc/domain_build.c
--- a/xen/arch/powerpc/domain_build.c Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/arch/powerpc/domain_build.c Fri Aug 25 15:28:48 2006 -0400
@@ -34,17 +34,21 @@ extern int loadelfimage_32(struct domain
extern int loadelfimage_32(struct domain_setup_info *dsi);
/* opt_dom0_mem: memory allocated to domain 0. */
-static unsigned int opt_dom0_mem;
+static unsigned int dom0_nrpages;
static void parse_dom0_mem(char *s)
{
- unsigned long long bytes = parse_size_and_unit(s);
- /* If no unit is specified we default to kB units, not bytes. */
- if (isdigit(s[strlen(s)-1]))
- opt_dom0_mem = (unsigned int)bytes;
- else
- opt_dom0_mem = (unsigned int)(bytes >> 10);
+ unsigned long long bytes;
+
+ bytes = parse_size_and_unit(s);
+ dom0_nrpages = bytes >> PAGE_SHIFT;
}
custom_param("dom0_mem", parse_dom0_mem);
+
+static unsigned int opt_dom0_max_vcpus;
+integer_param("dom0_max_vcpus", opt_dom0_max_vcpus);
+
+static unsigned int opt_dom0_shadow;
+boolean_param("dom0_shadow", opt_dom0_shadow);
int elf_sanity_check(Elf_Ehdr *ehdr)
{
@@ -146,8 +150,14 @@ int construct_dom0(struct domain *d,
/* By default DOM0 is allocated all available memory. */
d->max_pages = ~0U;
- d->tot_pages = 1UL << d->arch.rma_order;
-
+
+ if (dom0_nrpages == 0) {
+ dom0_nrpages = 1UL << d->arch.rma_order;
+ }
+
+ d->tot_pages = dom0_nrpages;
+ ASSERT(d->tot_pages > 0);
+
ASSERT( image_len < rma_sz );
si = (start_info_t *)(rma_addr(&d->arch, RMA_START_INFO) + rma);
@@ -161,10 +171,6 @@ int construct_dom0(struct domain *d,
printk("shared_info: 0x%lx,%p\n", si->shared_info, d->shared_info);
eomem = si->shared_info;
-
- /* allow dom0 to access all of system RAM */
- d->arch.logical_base_pfn = 128 << (20 - PAGE_SHIFT); /* 128 MB */
- d->arch.logical_end_pfn = max_page;
/* number of pages accessible */
si->nr_pages = rma_sz >> PAGE_SHIFT;
diff -r 7825169895d0 -r 43ec7afa5734 xen/arch/powerpc/iommu.c
--- a/xen/arch/powerpc/iommu.c Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/arch/powerpc/iommu.c Fri Aug 25 15:28:48 2006 -0400
@@ -52,17 +52,14 @@ int iommu_put(u32 buid, ulong ioba, unio
pfn = tce.tce_bits.tce_rpn;
mfn = pfn2mfn(d, pfn, &mtype);
- if (mtype != 0) {
- panic("we don't do non-RMO memory yet\n");
+ if (mfn > 0) {
+#ifdef DEBUG
+ printk("%s: ioba=0x%lx pfn=0x%lx mfn=0x%lx\n", __func__,
+ ioba, pfn, mfn);
+#endif
+ tce.tce_bits.tce_rpn = mfn;
+ return iommu_phbs[buid].iommu_put(ioba, tce);
}
-
-#ifdef DEBUG
- printk("%s: ioba=0x%lx pfn=0x%lx mfn=0x%lx\n", __func__,
- ioba, pfn, mfn);
-#endif
- tce.tce_bits.tce_rpn = mfn;
-
- return iommu_phbs[buid].iommu_put(ioba, tce);
}
return -1;
}
diff -r 7825169895d0 -r 43ec7afa5734 xen/arch/powerpc/mm.c
--- a/xen/arch/powerpc/mm.c Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/arch/powerpc/mm.c Fri Aug 25 15:28:48 2006 -0400
@@ -13,9 +13,10 @@
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
- * Copyright (C) IBM Corp. 2005
+ * Copyright (C) IBM Corp. 2005, 2006
*
* Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
+ * Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
*/
#include <xen/config.h>
@@ -23,9 +24,18 @@
#include <xen/shadow.h>
#include <xen/kernel.h>
#include <xen/sched.h>
+#include <xen/perfc.h>
#include <asm/misc.h>
#include <asm/init.h>
#include <asm/page.h>
+
+#ifdef VERBOSE
+#define MEM_LOG(_f, _a...) \
+ printk("DOM%u: (file=mm.c, line=%d) " _f "\n", \
+ current->domain->domain_id , __LINE__ , ## _a )
+#else
+#define MEM_LOG(_f, _a...) ((void)0)
+#endif
/* Frame table and its size in pages. */
struct page_info *frame_table;
@@ -53,16 +63,128 @@ int steal_page(struct domain *d, struct
return 1;
}
-
-int get_page_type(struct page_info *page, u32 type)
-{
- panic("%s called\n", __func__);
- return 1;
-}
-
void put_page_type(struct page_info *page)
{
- panic("%s called\n", __func__);
+ unsigned long nx, x, y = page->u.inuse.type_info;
+
+ do {
+ x = y;
+ nx = x - 1;
+
+ ASSERT((x & PGT_count_mask) != 0);
+
+ /*
+ * The page should always be validated while a reference is held. The
+ * exception is during domain destruction, when we forcibly invalidate
+ * page-table pages if we detect a referential loop.
+ * See domain.c:relinquish_list().
+ */
+ ASSERT((x & PGT_validated) ||
+ test_bit(_DOMF_dying, &page_get_owner(page)->domain_flags));
+
+ if ( unlikely((nx & PGT_count_mask) == 0) )
+ {
+ /* Record TLB information for flush later. */
+ page->tlbflush_timestamp = tlbflush_current_time();
+ }
+ else if ( unlikely((nx & (PGT_pinned|PGT_type_mask|PGT_count_mask)) ==
+ (PGT_pinned | 1)) )
+ {
+ /* Page is now only pinned. Make the back pointer mutable again. */
+ nx |= PGT_va_mutable;
+ }
+ }
+ while ( unlikely((y = cmpxchg(&page->u.inuse.type_info, x, nx)) != x) );
+}
+
+
+int get_page_type(struct page_info *page, unsigned long type)
+{
+ unsigned long nx, x, y = page->u.inuse.type_info;
+
+ again:
+ do {
+ x = y;
+ nx = x + 1;
+ if ( unlikely((nx & PGT_count_mask) == 0) )
+ {
+ MEM_LOG("Type count overflow on pfn %lx", page_to_mfn(page));
+ return 0;
+ }
+ else if ( unlikely((x & PGT_count_mask) == 0) )
+ {
+ if ( (x & (PGT_type_mask|PGT_va_mask)) != type )
+ {
+ if ( (x & PGT_type_mask) != (type & PGT_type_mask) )
+ {
+ /*
+ * On type change we check to flush stale TLB
+ * entries. This may be unnecessary (e.g., page
+ * was GDT/LDT) but those circumstances should be
+ * very rare.
+ */
+ cpumask_t mask =
+ page_get_owner(page)->domain_dirty_cpumask;
+ tlbflush_filter(mask, page->tlbflush_timestamp);
+
+ if ( unlikely(!cpus_empty(mask)) )
+ {
+ perfc_incrc(need_flush_tlb_flush);
+ flush_tlb_mask(mask);
+ }
+ }
+
+ /* We lose existing type, back pointer, and validity. */
+ nx &= ~(PGT_type_mask | PGT_va_mask | PGT_validated);
+ nx |= type;
+
+ /* No special validation needed for writable pages. */
+ /* Page tables and GDT/LDT need to be scanned for validity. */
+ if ( type == PGT_writable_page )
+ nx |= PGT_validated;
+ }
+ }
+ else
+ {
+ if ( unlikely((x & (PGT_type_mask|PGT_va_mask)) != type) )
+ {
+ if ( unlikely((x & PGT_type_mask) != (type & PGT_type_mask) ) )
+ {
+ return 0;
+ }
+ else if ( (x & PGT_va_mask) == PGT_va_mutable )
+ {
+ /* The va backpointer is mutable, hence we update it. */
+ nx &= ~PGT_va_mask;
+ nx |= type; /* we know the actual type is correct */
+ }
+ else if ( (type & PGT_va_mask) != PGT_va_mutable )
+ {
+ ASSERT((type & PGT_va_mask) != (x & PGT_va_mask));
+
+ /* This table is possibly mapped at multiple locations. */
+ nx &= ~PGT_va_mask;
+ nx |= PGT_va_unknown;
+ }
+ }
+ if ( unlikely(!(x & PGT_validated)) )
+ {
+ /* Someone else is updating validation of this page. Wait... */
+ while ( (y = page->u.inuse.type_info) == x )
+ cpu_relax();
+ goto again;
+ }
+ }
+ }
+ while ( unlikely((y = cmpxchg(&page->u.inuse.type_info, x, nx)) != x) );
+
+ if ( unlikely(!(nx & PGT_validated)) )
+ {
+ /* Noone else is updating simultaneously. */
+ __set_bit(_PGT_validated, &page->u.inuse.type_info);
+ }
+
+ return 1;
}
void __init init_frametable(void)
@@ -107,44 +229,50 @@ extern void copy_page(void *dp, void *sp
}
}
+static int mfn_in_hole(ulong mfn)
+{
+ /* totally cheating */
+ if (mfn >= (0xf0000000UL >> PAGE_SHIFT) &&
+ mfn < (((1UL << 32) - 1) >> PAGE_SHIFT))
+ return 1;
+
+ return 0;
+}
+
ulong pfn2mfn(struct domain *d, long pfn, int *type)
{
ulong rma_base_mfn = page_to_mfn(d->arch.rma_page);
ulong rma_size_mfn = 1UL << d->arch.rma_order;
- ulong mfn;
- int t;
if (pfn < rma_size_mfn) {
- mfn = pfn + rma_base_mfn;
- t = PFN_TYPE_RMA;
- } else if (pfn >= d->arch.logical_base_pfn &&
- pfn < d->arch.logical_end_pfn) {
- if (test_bit(_DOMF_privileged, &d->domain_flags)) {
- /* This hack allows dom0 to map all memory, necessary to
- * initialize domU state. */
- mfn = pfn;
- } else {
- panic("we do not handle the logical area yet\n");
- mfn = 0;
- }
-
- t = PFN_TYPE_LOGICAL;
- } else {
- /* don't know */
- mfn = pfn;
- t = PFN_TYPE_IO;
- }
-
- if (type != NULL)
- *type = t;
-
- return mfn;
+ if (type)
+ *type = PFN_TYPE_RMA;
+ return pfn + rma_base_mfn;
+ }
+
+ if (test_bit(_DOMF_privileged, &d->domain_flags) &&
+ mfn_in_hole(pfn)) {
+ if (type)
+ *type = PFN_TYPE_IO;
+ return pfn;
+ }
+
+ /* This hack allows dom0 to map all memory, necessary to
+ * initialize domU state. */
+ if (test_bit(_DOMF_privileged, &d->domain_flags)) {
+ if (type)
+ *type = PFN_TYPE_REMOTE;
+ return pfn;
+ }
+
+ BUG();
+ return 0;
}
void guest_physmap_add_page(
struct domain *d, unsigned long gpfn, unsigned long mfn)
{
- panic("%s\n", __func__);
+ printk("%s(%d, 0x%lx, 0x%lx)\n", __func__, d->domain_id, gpfn, mfn);
}
void guest_physmap_remove_page(
struct domain *d, unsigned long gpfn, unsigned long mfn)
diff -r 7825169895d0 -r 43ec7afa5734 xen/arch/powerpc/papr/xlate.c
--- a/xen/arch/powerpc/papr/xlate.c Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/arch/powerpc/papr/xlate.c Fri Aug 25 15:28:48 2006 -0400
@@ -154,13 +154,13 @@ static void h_enter(struct cpu_user_regs
}
/* get correct pgshift value */
- pgshift = d->arch.large_page_shift[lp_size];
+ pgshift = d->arch.large_page_order[lp_size] + PAGE_SHIFT;
}
/* get the correct logical RPN in terms of 4K pages need to mask
* off lp bits and unused arpn bits if this is a large page */
- lpn = ~0ULL << (pgshift - 12);
+ lpn = ~0ULL << (pgshift - PAGE_SHIFT);
lpn = pte.bits.rpn & lpn;
rpn = pfn2mfn(d, lpn, &mtype);
diff -r 7825169895d0 -r 43ec7afa5734 xen/arch/powerpc/powerpc64/ppc970.c
--- a/xen/arch/powerpc/powerpc64/ppc970.c Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/arch/powerpc/powerpc64/ppc970.c Fri Aug 25 15:28:48 2006 -0400
@@ -40,6 +40,17 @@ unsigned int cpu_rma_order(void)
uint rma_log_size = 6 + 20; /* (1 << 6) == 64 */
return rma_log_size - PAGE_SHIFT;
}
+
+unsigned int cpu_large_page_orders(uint *sizes, uint max)
+{
+ uint lp_log_size = 4 + 20; /* (1 << 4) == 16M */
+ if (max < 1)
+ return 0;
+
+ sizes[0] = lp_log_size - PAGE_SHIFT;
+
+ return 1;
+}
void cpu_initialize(int cpuid)
{
diff -r 7825169895d0 -r 43ec7afa5734 xen/include/asm-powerpc/domain.h
--- a/xen/include/asm-powerpc/domain.h Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/include/asm-powerpc/domain.h Fri Aug 25 15:28:48 2006 -0400
@@ -38,15 +38,11 @@ struct arch_domain {
struct page_info *rma_page;
uint rma_order;
- /* This is regular memory, only available thru translataion */
- ulong logical_base_pfn;
- ulong logical_end_pfn;
-
/* I/O-port access bitmap mask. */
u8 *iobmp_mask; /* Address of IO bitmap mask, or NULL. */
uint large_page_sizes;
- char large_page_shift[4];
+ uint large_page_order[4];
} __cacheline_aligned;
struct slb_entry {
diff -r 7825169895d0 -r 43ec7afa5734 xen/include/asm-powerpc/mm.h
--- a/xen/include/asm-powerpc/mm.h Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/include/asm-powerpc/mm.h Fri Aug 25 15:28:48 2006 -0400
@@ -24,6 +24,7 @@
#include <public/xen.h>
#include <xen/list.h>
#include <xen/types.h>
+#include <xen/mm.h>
#include <asm/misc.h>
#include <asm/system.h>
#include <asm/flushtlb.h>
@@ -33,7 +34,6 @@
#define memguard_unguard_range(_p,_l) ((void)0)
extern unsigned long xenheap_phys_end;
-#define IS_XEN_HEAP_FRAME(_pfn) (page_to_maddr(_pfn) < xenheap_phys_end)
/*
* Per-page-frame information.
@@ -43,7 +43,6 @@ extern unsigned long xenheap_phys_end;
* 2. Provide a PFN_ORDER() macro for accessing the order of a free page.
*/
#define PFN_ORDER(_pfn) ((_pfn)->u.free.order)
-#define PRtype_info "016lx"
/* XXX copy-and-paste job; re-examine me */
struct page_info
@@ -63,7 +62,7 @@ struct page_info
/* Page is in use: ((count_info & PGC_count_mask) != 0). */
struct {
/* Owner of this page (NULL if page is anonymous). */
- struct domain *_domain;
+ u32 _domain;
/* Type reference count and various PGT_xxx flags and fields. */
unsigned long type_info;
} inuse;
@@ -80,80 +79,132 @@ struct page_info
};
+struct page_extents {
+ /* Each frame can be threaded onto a doubly-linked list. */
+ struct list_head pe_list;
+
+ /* page extent */
+ struct page_info *pg;
+ uint order;
+ ulong pfn;
+};
+
/* The following page types are MUTUALLY EXCLUSIVE. */
#define PGT_none (0<<29) /* no special uses of this page */
-#define PGT_l1_page_table (1<<29) /* using this page as an L1 page table? */
-#define PGT_l2_page_table (2<<29) /* using this page as an L2 page table? */
-#define PGT_l3_page_table (3<<29) /* using this page as an L3 page table? */
-#define PGT_l4_page_table (4<<29) /* using this page as an L4 page table? */
-#define PGT_gdt_page (5<<29) /* using this page in a GDT? */
-#define PGT_ldt_page (6<<29) /* using this page in an LDT? */
+#define PGT_RMA (1<<29) /* This page is an RMA page? */
#define PGT_writable_page (7<<29) /* has writable mappings of this page? */
#define PGT_type_mask (7<<29) /* Bits 29-31. */
+
+ /* Owning guest has pinned this page to its current type? */
+#define _PGT_pinned 28
+#define PGT_pinned (1U<<_PGT_pinned)
/* Has this page been validated for use as its current type? */
-#define _PGT_validated 28
+#define _PGT_validated 27
#define PGT_validated (1U<<_PGT_validated)
- /* Owning guest has pinned this page to its current type? */
-#define _PGT_pinned 27
-#define PGT_pinned (1U<<_PGT_pinned)
- /* The 10 most significant bits of virt address if this is a page table. */
-#define PGT_va_shift 17
-#define PGT_va_mask (((1U<<10)-1)<<PGT_va_shift)
+
+ /* The 27 most significant bits of virt address if this is a page table. */
+#define PGT_va_shift 32
+#define PGT_va_mask ((unsigned long)((1U<<28)-1)<<PGT_va_shift)
/* Is the back pointer still mutable (i.e. not fixed yet)? */
-#define PGT_va_mutable (((1U<<10)-1)<<PGT_va_shift)
+#define PGT_va_mutable ((unsigned long)((1U<<28)-1)<<PGT_va_shift)
/* Is the back pointer unknown (e.g., p.t. is mapped at multiple VAs)? */
-#define PGT_va_unknown (((1U<<10)-2)<<PGT_va_shift)
- /* 17-bit count of uses of this frame as its current type. */
-#define PGT_count_mask ((1U<<17)-1)
+#define PGT_va_unknown ((unsigned long)((1U<<28)-2)<<PGT_va_shift)
+
+ /* 16-bit count of uses of this frame as its current type. */
+#define PGT_count_mask ((1U<<16)-1)
/* Cleared when the owning guest 'frees' this page. */
#define _PGC_allocated 31
#define PGC_allocated (1U<<_PGC_allocated)
- /* 31-bit count of references to this frame. */
-#define PGC_count_mask ((1U<<31)-1)
+ /* Set on a *guest* page to mark it out-of-sync with its shadow */
+#define _PGC_out_of_sync 30
+#define PGC_out_of_sync (1U<<_PGC_out_of_sync)
+ /* Set when is using a page as a page table */
+#define _PGC_page_table 29
+#define PGC_page_table (1U<<_PGC_page_table)
+ /* 29-bit count of references to this frame. */
+#define PGC_count_mask ((1U<<29)-1)
+
+#define IS_XEN_HEAP_FRAME(_pfn) (page_to_maddr(_pfn) < xenheap_phys_end)
+
+static inline struct domain *unpickle_domptr(u32 _domain)
+{ return ((_domain == 0) || (_domain & 1)) ? NULL : __va(_domain); }
+
+static inline u32 pickle_domptr(struct domain *domain)
+{ return (domain == NULL) ? 0 : (u32)__pa(domain); }
+
+#define PRtype_info "016lx"/* should only be used for printk's */
+
+#define page_get_owner(_p) (unpickle_domptr((_p)->u.inuse._domain))
+#define page_set_owner(_p,_d) ((_p)->u.inuse._domain = pickle_domptr(_d))
+
+extern struct page_info *frame_table;
+extern unsigned long max_page;
+extern unsigned long total_pages;
+void init_frametable(void);
static inline void put_page(struct page_info *page)
{
-#if 0
- int count;
-
- count = atomic_dec_return(&page->count_info);
-
- if ( unlikely((count & PGC_count_mask) == 0) )
+ u32 nx, x, y = page->count_info;
+
+ do {
+ x = y;
+ nx = x - 1;
+ }
+ while ( unlikely((y = cmpxchg(&page->count_info, x, nx)) != x) );
+
+ if ( unlikely((nx & PGC_count_mask) == 0) ) {
+ panic("about to free page\n");
free_domheap_page(page);
-#else
- trap();
-#endif
+ }
}
static inline int get_page(struct page_info *page,
struct domain *domain)
{
-#if 0
- int count;
-
- count = atomic_inc_return(&page->count_info);
-
- if (((count & PGC_count_mask) == 0) || /* Count overflow? */
- ((count & PGC_count_mask) == 1) || /* Wasn't allocated? */
- ((page->domain != domain))) /* Wrong owner? */
- {
- atomic_dec(&page->count_info);
- return 0;
- }
-
-#else
- trap();
-#endif
+ u32 x, nx, y = page->count_info;
+ u32 d, nd = page->u.inuse._domain;
+ u32 _domain = pickle_domptr(domain);
+
+ do {
+ x = y;
+ nx = x + 1;
+ d = nd;
+ if ( unlikely((x & PGC_count_mask) == 0) || /* Not allocated? */
+ unlikely((nx & PGC_count_mask) == 0) || /* Count overflow? */
+ unlikely(d != _domain) ) /* Wrong owner? */
+ {
+ return 0;
+ }
+ y = cmpxchg(&page->count_info, x, nx);
+ }
+ while ( unlikely(y != x) );
+
return 1;
+}
+
+extern void put_page_type(struct page_info *page);
+extern int get_page_type(struct page_info *page, unsigned long type);
+
+static inline void put_page_and_type(struct page_info *page)
+{
+ put_page_type(page);
+ put_page(page);
}
static inline int get_page_and_type(struct page_info *page,
struct domain *domain,
- u32 type)
-{
- trap();
- return 1;
+ unsigned long type)
+{
+ int rc = get_page(page, domain);
+
+ if ( likely(rc) && unlikely(!get_page_type(page, type)) )
+ {
+ put_page(page);
+ rc = 0;
+ }
+
+ return rc;
}
static inline int page_is_removable(struct page_info *page)
@@ -161,16 +212,9 @@ static inline int page_is_removable(stru
return ((page->count_info & PGC_count_mask) == 1);
}
-int get_page_type(struct page_info *page, u32 type);
-
#define set_machinetophys(_mfn, _pfn) (trap(), 0)
extern void synchronise_pagetables(unsigned long cpu_mask);
-
-static inline void put_page_and_type(struct page_info *page)
-{
- trap();
-}
/* XXX don't know what this is for */
typedef struct {
@@ -179,17 +223,10 @@ typedef struct {
} vm_assist_info_t;
extern vm_assist_info_t vm_assist_info[];
-#define page_get_owner(_p) ((_p)->u.inuse._domain)
-#define page_set_owner(_p,_d) ((_p)->u.inuse._domain = _d)
-
#define share_xen_page_with_guest(p, d, r) do { } while (0)
#define share_xen_page_with_privileged_guests(p, r) do { } while (0)
-extern struct page_info *frame_table;
extern unsigned long frame_table_size;
-extern unsigned long max_page;
-extern unsigned long total_pages;
-void init_frametable(void);
/* hope that accesses to this will fail spectacularly */
#define machine_to_phys_mapping ((u32 *)-1UL)
@@ -199,12 +236,12 @@ extern int update_grant_va_mapping(unsig
struct domain *,
struct vcpu *);
-extern void put_page_type(struct page_info *page);
-
-#define PFN_TYPE_RMA 0
-#define PFN_TYPE_LOGICAL 1
-#define PFN_TYPE_IO 2
-extern ulong pfn2mfn(struct domain *d, long mfn, int *type);
+#define PFN_TYPE_RMA 1
+#define PFN_TYPE_LOGICAL 2
+#define PFN_TYPE_IO 3
+#define PFN_TYPE_REMOTE 4
+
+extern ulong pfn2mfn(struct domain *d, long pfn, int *type);
/* Arch-specific portion of memory_op hypercall. */
long arch_memory_op(int op, XEN_GUEST_HANDLE(void) arg);
diff -r 7825169895d0 -r 43ec7afa5734 xen/include/asm-powerpc/processor.h
--- a/xen/include/asm-powerpc/processor.h Fri Aug 25 14:34:51 2006 -0400
+++ b/xen/include/asm-powerpc/processor.h Fri Aug 25 15:28:48 2006 -0400
@@ -40,7 +40,8 @@ extern void show_registers(struct cpu_us
extern void show_registers(struct cpu_user_regs *);
extern void show_execution_state(struct cpu_user_regs *);
extern void show_backtrace(ulong sp, ulong lr, ulong pc);
-extern unsigned int cpu_rma_order(void);
+extern uint cpu_rma_order(void);
+extern uint cpu_large_page_orders(uint *sizes, uint max);
extern void cpu_initialize(int cpuid);
extern void cpu_init_vcpu(struct vcpu *);
extern void save_cpu_sprs(struct vcpu *);
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