While shuffling quite a few things around, this gets us closer to native,
which clearly had a reason to do the DMI scan early.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
Index: head-2007-02-08/arch/i386/mm/ioremap-xen.c
===================================================================
--- head-2007-02-08.orig/arch/i386/mm/ioremap-xen.c 2007-02-08
17:07:13.000000000 +0100
+++ head-2007-02-08/arch/i386/mm/ioremap-xen.c 2007-02-08 17:09:47.000000000
+0100
@@ -374,8 +374,6 @@ void iounmap(volatile void __iomem *addr
}
EXPORT_SYMBOL(iounmap);
-#ifdef __i386__
-
void __init *bt_ioremap(unsigned long phys_addr, unsigned long size)
{
unsigned long offset, last_addr;
@@ -443,5 +441,3 @@ void __init bt_iounmap(void *addr, unsig
--nrpages;
}
}
-
-#endif /* __i386__ */
Index: head-2007-02-08/arch/x86_64/kernel/setup-xen.c
===================================================================
--- head-2007-02-08.orig/arch/x86_64/kernel/setup-xen.c 2007-02-08
17:07:13.000000000 +0100
+++ head-2007-02-08/arch/x86_64/kernel/setup-xen.c 2007-02-08
17:09:47.000000000 +0100
@@ -681,7 +681,8 @@ void __init setup_arch(char **cmdline_p)
init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
- /* dmi_scan_machine(); */
+ if (is_initial_xendomain())
+ dmi_scan_machine();
#ifdef CONFIG_ACPI_NUMA
/*
@@ -1630,13 +1629,6 @@ struct seq_operations cpuinfo_op = {
.show = show_cpuinfo,
};
-static int __init run_dmi_scan(void)
-{
- dmi_scan_machine();
- return 0;
-}
-core_initcall(run_dmi_scan);
-
#if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
#include <linux/platform_device.h>
static __init int add_pcspkr(void)
Index: head-2007-02-08/arch/x86_64/mm/init-xen.c
===================================================================
--- head-2007-02-08.orig/arch/x86_64/mm/init-xen.c 2007-02-08
17:07:13.000000000 +0100
+++ head-2007-02-08/arch/x86_64/mm/init-xen.c 2007-02-08 17:09:47.000000000
+0100
@@ -208,7 +208,11 @@ static __init void *spp_getpage(void)
void *ptr;
if (after_bootmem)
ptr = (void *) get_zeroed_page(GFP_ATOMIC);
- else
+ else if (start_pfn < table_end) {
+ ptr = __va(start_pfn << PAGE_SHIFT);
+ start_pfn++;
+ memset(ptr, 0, PAGE_SIZE);
+ } else
ptr = alloc_bootmem_pages(PAGE_SIZE);
if (!ptr || ((unsigned long)ptr & ~PAGE_MASK))
panic("set_pte_phys: cannot allocate page data %s\n",
after_bootmem?"after bootmem":"");
@@ -436,17 +441,34 @@ static inline int make_readonly(unsigned
return readonly;
}
+#ifndef CONFIG_XEN
/* Must run before zap_low_mappings */
__init void *early_ioremap(unsigned long addr, unsigned long size)
{
- return ioremap(addr, size);
+ unsigned long map = round_down(addr, LARGE_PAGE_SIZE);
+
+ /* actually usually some more */
+ if (size >= LARGE_PAGE_SIZE) {
+ printk("SMBIOS area too long %lu\n", size);
+ return NULL;
+ }
+ set_pmd(temp_mappings[0].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
+ map += LARGE_PAGE_SIZE;
+ set_pmd(temp_mappings[1].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
+ __flush_tlb();
+ return temp_mappings[0].address + (addr & (LARGE_PAGE_SIZE-1));
}
/* To avoid virtual aliases later */
__init void early_iounmap(void *addr, unsigned long size)
{
- iounmap(addr);
+ if ((void *)round_down((unsigned long)addr, LARGE_PAGE_SIZE) !=
temp_mappings[0].address)
+ printk("early_iounmap: bad address %p\n", addr);
+ set_pmd(temp_mappings[0].pmd, __pmd(0));
+ set_pmd(temp_mappings[1].pmd, __pmd(0));
+ __flush_tlb();
}
+#endif
static void __meminit
phys_pmd_init(pmd_t *pmd, unsigned long address, unsigned long end)
@@ -648,9 +670,9 @@ void __init extend_init_mapping(unsigned
}
}
-static void __init find_early_table_space(unsigned long end)
+static unsigned long __init find_early_table_space(unsigned long end)
{
- unsigned long puds, pmds, ptes, tables;
+ unsigned long puds, pmds, ptes, tables, fixmap_tables;
puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
@@ -660,7 +682,16 @@ static void __init find_early_table_spac
round_up(pmds * 8, PAGE_SIZE) +
round_up(ptes * 8, PAGE_SIZE);
- extend_init_mapping(tables);
+ /* Also reserve pages for fixmaps that need to be set up early.
+ * Their pud is shared with the kernel pud.
+ */
+ pmds = (PMD_SIZE - 1 - FIXADDR_START) >> PMD_SHIFT;
+ ptes = (PTE_SIZE - 1 - FIXADDR_START) >> PAGE_SHIFT;
+
+ fixmap_tables = round_up(pmds * 8, PAGE_SIZE) +
+ round_up(ptes * 8, PAGE_SIZE);
+
+ extend_init_mapping(tables + fixmap_tables);
table_start = start_pfn;
table_end = table_start + (tables>>PAGE_SHIFT);
@@ -668,6 +699,8 @@ static void __init find_early_table_spac
early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n",
end, table_start << PAGE_SHIFT,
(table_start << PAGE_SHIFT) + tables);
+
+ return table_end + (fixmap_tables>>PAGE_SHIFT);
}
/* Setup the direct mapping of the physical memory at PAGE_OFFSET.
@@ -675,7 +708,7 @@ static void __init find_early_table_spac
physical memory. To access them they are temporarily mapped. */
void __meminit init_memory_mapping(unsigned long start, unsigned long end)
{
- unsigned long next;
+ unsigned long next, table_rsrv_end = 0;
Dprintk("init_memory_mapping\n");
@@ -686,7 +719,7 @@ void __meminit init_memory_mapping(unsig
* discovered.
*/
if (!after_bootmem)
- find_early_table_space(end);
+ table_rsrv_end = find_early_table_space(end);
start = (unsigned long)__va(start);
end = (unsigned long)__va(end);
@@ -714,6 +747,7 @@ void __meminit init_memory_mapping(unsig
if (!after_bootmem) {
BUG_ON(start_pfn != table_end);
+ table_end = table_rsrv_end;
/* Re-vector virtual addresses pointing into the initial
mapping to the just-established permanent ones. */
@@ -739,6 +773,24 @@ void __meminit init_memory_mapping(unsig
for (; start < end; start += PAGE_SIZE)
WARN_ON(HYPERVISOR_update_va_mapping(
start, __pte_ma(0), 0));
+
+ /* Switch to the real shared_info page, and clear the
+ * dummy page. */
+ set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info);
+ HYPERVISOR_shared_info = (shared_info_t
*)fix_to_virt(FIX_SHARED_INFO);
+ memset(empty_zero_page, 0, sizeof(empty_zero_page));
+
+ /* Setup mapping of lower 1st MB */
+ for (next = 0; next < NR_FIX_ISAMAPS; next++)
+ if (is_initial_xendomain())
+ set_fixmap(FIX_ISAMAP_BEGIN - next, next *
PAGE_SIZE);
+ else
+ __set_fixmap(FIX_ISAMAP_BEGIN - next,
+ virt_to_mfn(empty_zero_page) <<
PAGE_SHIFT,
+ PAGE_KERNEL_RO);
+
+ BUG_ON(start_pfn > table_end);
+ table_end = start_pfn;
}
__flush_tlb_all();
@@ -817,7 +869,6 @@ size_zones(unsigned long *z, unsigned lo
void __init paging_init(void)
{
unsigned long zones[MAX_NR_ZONES], holes[MAX_NR_ZONES];
- int i;
memory_present(0, 0, end_pfn);
sparse_init();
@@ -825,22 +876,7 @@ void __init paging_init(void)
free_area_init_node(0, NODE_DATA(0), zones,
__pa(PAGE_OFFSET) >> PAGE_SHIFT, holes);
- /* Switch to the real shared_info page, and clear the
- * dummy page. */
- set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info);
- HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
- memset(empty_zero_page, 0, sizeof(empty_zero_page));
-
init_mm.context.pinned = 1;
-
- /* Setup mapping of lower 1st MB */
- for (i = 0; i < NR_FIX_ISAMAPS; i++)
- if (is_initial_xendomain())
- set_fixmap(FIX_ISAMAP_BEGIN - i, i * PAGE_SIZE);
- else
- __set_fixmap(FIX_ISAMAP_BEGIN - i,
- virt_to_mfn(empty_zero_page) << PAGE_SHIFT,
- PAGE_KERNEL_RO);
}
#endif
Index: head-2007-02-08/include/asm-x86_64/mach-xen/asm/io.h
===================================================================
--- head-2007-02-08.orig/include/asm-x86_64/mach-xen/asm/io.h 2007-02-08
17:07:13.000000000 +0100
+++ head-2007-02-08/include/asm-x86_64/mach-xen/asm/io.h 2007-02-08
17:09:47.000000000 +0100
@@ -150,8 +150,10 @@ static inline void __iomem * ioremap (un
return __ioremap(offset, size, 0);
}
-extern void *early_ioremap(unsigned long addr, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
+extern void *bt_ioremap(unsigned long addr, unsigned long size);
+extern void bt_iounmap(void *addr, unsigned long size);
+#define early_ioremap bt_ioremap
+#define early_iounmap bt_iounmap
/*
* This one maps high address device memory and turns off caching for that
area.
Index: head-2007-02-08/include/asm-x86_64/mach-xen/asm/fixmap.h
===================================================================
--- head-2007-02-08.orig/include/asm-x86_64/mach-xen/asm/fixmap.h
2007-02-08 17:07:13.000000000 +0100
+++ head-2007-02-08/include/asm-x86_64/mach-xen/asm/fixmap.h 2007-02-08
17:09:47.000000000 +0100
@@ -53,6 +53,11 @@ enum fixed_addresses {
#define NR_FIX_ISAMAPS 256
FIX_ISAMAP_END,
FIX_ISAMAP_BEGIN = FIX_ISAMAP_END + NR_FIX_ISAMAPS - 1,
+ __end_of_permanent_fixed_addresses,
+ /* temporary boot-time mappings, used before ioremap() is functional */
+#define NR_FIX_BTMAPS 16
+ FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS - 1,
__end_of_fixed_addresses
};
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