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-rw-r--r--arch/x86/xen/enlighten.c3
-rw-r--r--arch/x86/xen/mmu.c5
-rw-r--r--arch/x86/xen/p2m.c65
3 files changed, 18 insertions, 55 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 1a3f0445432a..fac5e4f9607c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1636,9 +1636,6 @@ asmlinkage __visible void __init xen_start_kernel(void)
xen_raw_console_write("mapping kernel into physical memory\n");
xen_setup_kernel_pagetable((pgd_t *)xen_start_info->pt_base, xen_start_info->nr_pages);
- /* Allocate and initialize top and mid mfn levels for p2m structure */
- xen_build_mfn_list_list();
-
/* keep using Xen gdt for now; no urgent need to change it */
#ifdef CONFIG_X86_32
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index f62af7647ec9..a8a1a3d08d4d 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1217,10 +1217,13 @@ static void __init xen_pagetable_p2m_copy(void)
static void __init xen_pagetable_init(void)
{
paging_init();
- xen_setup_shared_info();
#ifdef CONFIG_X86_64
xen_pagetable_p2m_copy();
#endif
+ /* Allocate and initialize top and mid mfn levels for p2m structure */
+ xen_build_mfn_list_list();
+
+ xen_setup_shared_info();
xen_post_allocator_init();
}
static void xen_write_cr2(unsigned long cr2)
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 4534320e66e4..d1b3da2960ab 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -163,6 +163,7 @@
#include <linux/hash.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
+#include <linux/bootmem.h>
#include <asm/cache.h>
#include <asm/setup.h>
@@ -181,21 +182,20 @@ static void __init m2p_override_init(void);
unsigned long xen_max_p2m_pfn __read_mostly;
+static unsigned long *p2m_mid_missing_mfn;
+static unsigned long *p2m_top_mfn;
+static unsigned long **p2m_top_mfn_p;
+
/* Placeholders for holes in the address space */
static RESERVE_BRK_ARRAY(unsigned long, p2m_missing, P2M_PER_PAGE);
static RESERVE_BRK_ARRAY(unsigned long *, p2m_mid_missing, P2M_MID_PER_PAGE);
-static RESERVE_BRK_ARRAY(unsigned long, p2m_mid_missing_mfn, P2M_MID_PER_PAGE);
static RESERVE_BRK_ARRAY(unsigned long **, p2m_top, P2M_TOP_PER_PAGE);
-static RESERVE_BRK_ARRAY(unsigned long, p2m_top_mfn, P2M_TOP_PER_PAGE);
-static RESERVE_BRK_ARRAY(unsigned long *, p2m_top_mfn_p, P2M_TOP_PER_PAGE);
static RESERVE_BRK_ARRAY(unsigned long, p2m_identity, P2M_PER_PAGE);
static RESERVE_BRK_ARRAY(unsigned long *, p2m_mid_identity, P2M_MID_PER_PAGE);
-static RESERVE_BRK_ARRAY(unsigned long, p2m_mid_identity_mfn, P2M_MID_PER_PAGE);
RESERVE_BRK(p2m_mid, PAGE_SIZE * (MAX_DOMAIN_PAGES / (P2M_PER_PAGE * P2M_MID_PER_PAGE)));
-RESERVE_BRK(p2m_mid_mfn, PAGE_SIZE * (MAX_DOMAIN_PAGES / (P2M_PER_PAGE * P2M_MID_PER_PAGE)));
/* For each I/O range remapped we may lose up to two leaf pages for the boundary
* violations and three mid pages to cover up to 3GB. With
@@ -272,11 +272,11 @@ static void p2m_init(unsigned long *p2m)
* Build the parallel p2m_top_mfn and p2m_mid_mfn structures
*
* This is called both at boot time, and after resuming from suspend:
- * - At boot time we're called very early, and must use extend_brk()
+ * - At boot time we're called rather early, and must use alloc_bootmem*()
* to allocate memory.
*
* - After resume we're called from within stop_machine, but the mfn
- * tree should alreay be completely allocated.
+ * tree should already be completely allocated.
*/
void __ref xen_build_mfn_list_list(void)
{
@@ -287,20 +287,17 @@ void __ref xen_build_mfn_list_list(void)
/* Pre-initialize p2m_top_mfn to be completely missing */
if (p2m_top_mfn == NULL) {
- p2m_mid_missing_mfn = extend_brk(PAGE_SIZE, PAGE_SIZE);
+ p2m_mid_missing_mfn = alloc_bootmem_align(PAGE_SIZE, PAGE_SIZE);
p2m_mid_mfn_init(p2m_mid_missing_mfn, p2m_missing);
- p2m_mid_identity_mfn = extend_brk(PAGE_SIZE, PAGE_SIZE);
- p2m_mid_mfn_init(p2m_mid_identity_mfn, p2m_identity);
- p2m_top_mfn_p = extend_brk(PAGE_SIZE, PAGE_SIZE);
+ p2m_top_mfn_p = alloc_bootmem_align(PAGE_SIZE, PAGE_SIZE);
p2m_top_mfn_p_init(p2m_top_mfn_p);
- p2m_top_mfn = extend_brk(PAGE_SIZE, PAGE_SIZE);
+ p2m_top_mfn = alloc_bootmem_align(PAGE_SIZE, PAGE_SIZE);
p2m_top_mfn_init(p2m_top_mfn);
} else {
/* Reinitialise, mfn's all change after migration */
p2m_mid_mfn_init(p2m_mid_missing_mfn, p2m_missing);
- p2m_mid_mfn_init(p2m_mid_identity_mfn, p2m_identity);
}
for (pfn = 0; pfn < xen_max_p2m_pfn; pfn += P2M_PER_PAGE) {
@@ -328,10 +325,9 @@ void __ref xen_build_mfn_list_list(void)
/*
* XXX boot-time only! We should never find
* missing parts of the mfn tree after
- * runtime. extend_brk() will BUG if we call
- * it too late.
+ * runtime.
*/
- mid_mfn_p = extend_brk(PAGE_SIZE, PAGE_SIZE);
+ mid_mfn_p = alloc_bootmem_align(PAGE_SIZE, PAGE_SIZE);
p2m_mid_mfn_init(mid_mfn_p, p2m_missing);
p2m_top_mfn_p[topidx] = mid_mfn_p;
@@ -415,7 +411,6 @@ void __init xen_build_dynamic_phys_to_machine(void)
m2p_override_init();
}
#ifdef CONFIG_X86_64
-#include <linux/bootmem.h>
unsigned long __init xen_revector_p2m_tree(void)
{
unsigned long va_start;
@@ -477,7 +472,6 @@ unsigned long __init xen_revector_p2m_tree(void)
copy_page(new, mid_p);
p2m_top[topidx][mididx] = &mfn_list[pfn_free];
- p2m_top_mfn_p[topidx][mididx] = virt_to_mfn(&mfn_list[pfn_free]);
pfn_free += P2M_PER_PAGE;
@@ -610,7 +604,6 @@ static bool __init early_alloc_p2m(unsigned long pfn, bool check_boundary)
{
unsigned topidx, mididx, idx;
unsigned long *p2m;
- unsigned long *mid_mfn_p;
topidx = p2m_top_index(pfn);
mididx = p2m_mid_index(pfn);
@@ -637,43 +630,21 @@ static bool __init early_alloc_p2m(unsigned long pfn, bool check_boundary)
p2m_top[topidx][mididx] = p2m;
- /* For save/restore we need to MFN of the P2M saved */
-
- mid_mfn_p = p2m_top_mfn_p[topidx];
- WARN(mid_mfn_p[mididx] != virt_to_mfn(p2m_missing),
- "P2M_TOP_P[%d][%d] != MFN of p2m_missing!\n",
- topidx, mididx);
- mid_mfn_p[mididx] = virt_to_mfn(p2m);
-
return true;
}
static bool __init early_alloc_p2m_middle(unsigned long pfn)
{
unsigned topidx = p2m_top_index(pfn);
- unsigned long *mid_mfn_p;
unsigned long **mid;
mid = p2m_top[topidx];
- mid_mfn_p = p2m_top_mfn_p[topidx];
if (mid == p2m_mid_missing) {
mid = extend_brk(PAGE_SIZE, PAGE_SIZE);
p2m_mid_init(mid, p2m_missing);
p2m_top[topidx] = mid;
-
- BUG_ON(mid_mfn_p != p2m_mid_missing_mfn);
- }
- /* And the save/restore P2M tables.. */
- if (mid_mfn_p == p2m_mid_missing_mfn) {
- mid_mfn_p = extend_brk(PAGE_SIZE, PAGE_SIZE);
- p2m_mid_mfn_init(mid_mfn_p, p2m_missing);
-
- p2m_top_mfn_p[topidx] = mid_mfn_p;
- p2m_top_mfn[topidx] = virt_to_mfn(mid_mfn_p);
- /* Note: we don't set mid_mfn_p[midix] here,
- * look in early_alloc_p2m() */
}
return true;
}
@@ -684,14 +655,13 @@ static bool __init early_alloc_p2m_middle(unsigned long pfn)
* replace the P2M leaf with a p2m_missing or p2m_identity.
* Stick the old page in the new P2M tree location.
*/
-bool __init early_can_reuse_p2m_middle(unsigned long set_pfn, unsigned long set_mfn)
+static bool __init early_can_reuse_p2m_middle(unsigned long set_pfn)
{
unsigned topidx;
unsigned mididx;
unsigned ident_pfns;
unsigned inv_pfns;
unsigned long *p2m;
- unsigned long *mid_mfn_p;
unsigned idx;
unsigned long pfn;
@@ -737,11 +707,6 @@ bool __init early_can_reuse_p2m_middle(unsigned long set_pfn, unsigned long set_
found:
/* Found one, replace old with p2m_identity or p2m_missing */
p2m_top[topidx][mididx] = (ident_pfns ? p2m_identity : p2m_missing);
- /* And the other for save/restore.. */
- mid_mfn_p = p2m_top_mfn_p[topidx];
- /* NOTE: Even if it is a p2m_identity it should still be point to
- * a page filled with INVALID_P2M_ENTRY entries. */
- mid_mfn_p[mididx] = virt_to_mfn(p2m_missing);
/* Reset where we want to stick the old page in. */
topidx = p2m_top_index(set_pfn);
@@ -756,8 +721,6 @@ found:
p2m_init(p2m);
p2m_top[topidx][mididx] = p2m;
- mid_mfn_p = p2m_top_mfn_p[topidx];
- mid_mfn_p[mididx] = virt_to_mfn(p2m);
return true;
}
@@ -767,7 +730,7 @@ bool __init early_set_phys_to_machine(unsigned long pfn, unsigned long mfn)
if (!early_alloc_p2m_middle(pfn))
return false;
- if (early_can_reuse_p2m_middle(pfn, mfn))
+ if (early_can_reuse_p2m_middle(pfn))
return __set_phys_to_machine(pfn, mfn);
if (!early_alloc_p2m(pfn, false /* boundary crossover OK!*/))
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-26 22:39:40 +0000