.. to make clear that no relevant state is actually maintained in there and
that, as a consequence, adjustments to
native Linux code in this area aren't applicable to the Xen kernels.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
------------------------------------------------------------------------
Index: head-2006-05-03/arch/i386/kernel/setup-xen.c
===================================================================
--- head-2006-05-03.orig/arch/i386/kernel/setup-xen.c 2006-05-08
16:04:28.000000000 +0200
+++ head-2006-05-03/arch/i386/kernel/setup-xen.c 2006-05-08
16:09:21.000000000 +0200
@@ -157,7 +157,9 @@ struct ist_info ist_info;
defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
EXPORT_SYMBOL(ist_info);
#endif
+#ifndef CONFIG_XEN
struct e820map e820;
+#endif
extern void early_cpu_init(void);
extern void generic_apic_probe(char *);
@@ -399,6 +401,7 @@ EXPORT_SYMBOL(phys_to_machine_mapping);
start_info_t *xen_start_info;
EXPORT_SYMBOL(xen_start_info);
+#ifndef CONFIG_XEN
static void __init limit_regions(unsigned long long size)
{
unsigned long long current_addr = 0;
@@ -492,7 +495,6 @@ static void __init print_memory_map(char
}
}
-#if 0
/*
* Sanitize the BIOS e820 map.
*
@@ -747,7 +749,9 @@ static void __init parse_cmdline_early (
{
char c = ' ', *to = command_line, *from = saved_command_line;
int len = 0, max_cmdline;
+#ifndef CONFIG_XEN
int userdef = 0;
+#endif
if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
max_cmdline = COMMAND_LINE_SIZE;
@@ -795,6 +799,7 @@ static void __init parse_cmdline_early (
}
}
+#ifndef CONFIG_XEN
else if (!memcmp(from, "memmap=", 7)) {
if (to != command_line)
to--;
@@ -836,6 +841,7 @@ static void __init parse_cmdline_early (
}
}
}
+#endif
else if (!memcmp(from, "noexec=", 7))
noexec_setup(from + 7);
@@ -978,10 +984,12 @@ static void __init parse_cmdline_early (
}
*to = '\0';
*cmdline_p = command_line;
+#ifndef CONFIG_XEN
if (userdef) {
printk(KERN_INFO "user-defined physical RAM map:\n");
print_memory_map("user");
}
+#endif
}
#if 0 /* !XEN */
@@ -1111,6 +1119,7 @@ unsigned long __init find_max_low_pfn(vo
return max_low_pfn;
}
+#ifndef CONFIG_XEN
/*
* Free all available memory for boot time allocation. Used
* as a callback function by efi_memory_walk()
@@ -1129,11 +1138,14 @@ free_available_memory(unsigned long star
return 0;
}
+#endif
+
/*
* Register fully available low RAM pages with the bootmem allocator.
*/
static void __init register_bootmem_low_pages(unsigned long max_low_pfn)
{
+#ifndef CONFIG_XEN
int i;
if (efi_enabled) {
@@ -1171,6 +1183,13 @@ static void __init register_bootmem_low_
size = last_pfn - curr_pfn;
free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
}
+#else
+ unsigned long size = xen_start_info->nr_pages;
+
+ if (size > max_low_pfn)
+ size = max_low_pfn;
+ free_bootmem(0, PFN_PHYS(size));
+#endif
}
#ifndef CONFIG_XEN
@@ -1699,12 +1718,14 @@ void __init setup_arch(char **cmdline_p)
setup_xen_features();
ARCH_SETUP
+#ifndef CONFIG_XEN
if (efi_enabled)
efi_init();
else {
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
print_memory_map(machine_specific_memory_setup());
}
+#endif
copy_edd();
Index: head-2006-05-03/arch/x86_64/kernel/e820-xen.c
===================================================================
--- head-2006-05-03.orig/arch/x86_64/kernel/e820-xen.c 2006-05-03
09:39:54.000000000 +0200
+++ head-2006-05-03/arch/x86_64/kernel/e820-xen.c 2006-05-08
16:04:28.000000000 +0200
@@ -36,6 +36,7 @@ EXPORT_SYMBOL(end_pfn);
unsigned long end_user_pfn = MAXMEM>>PAGE_SHIFT;
unsigned long end_pfn_map;
+#ifndef CONFIG_XEN
/*
* Add a memory region to the kernel e820 map.
*/
@@ -54,8 +55,6 @@ void __init add_memory_region(unsigned l
e820.nr_map++;
}
-#ifndef CONFIG_XEN
-
/*
* end_pfn only includes RAM, while end_pfn_map includes all e820 entries.
* The direct mapping extends to end_pfn_map, so that we can directly access
@@ -278,6 +279,7 @@ int __init e820_all_mapped(unsigned long
}
#endif /* CONFIG_XEN */
+#ifndef CONFIG_XEN
void __init e820_print_map(char *who)
{
int i;
@@ -304,7 +304,6 @@ void __init e820_print_map(char *who)
}
}
-#ifndef CONFIG_XEN
/*
* Sanitize the BIOS e820 map.
*
@@ -562,7 +561,8 @@ void __init setup_memory_region(void)
#else /* CONFIG_XEN */
-extern unsigned long xen_override_max_pfn;
+/* Allows setting of maximum possible memory size */
+static unsigned long xen_override_max_pfn;
extern union xen_start_info_union xen_start_info_union;
unsigned long __init e820_end_of_ram(void)
@@ -662,6 +662,7 @@ void __init parse_memopt(char *p, char *
xen_override_max_pfn = (unsigned long) end_user_pfn;
}
+#ifndef CONFIG_XEN
void __init parse_memmapopt(char *p, char **from)
{
unsigned long long start_at, mem_size;
@@ -682,6 +683,7 @@ void __init parse_memmapopt(char *p, cha
}
p = *from;
}
+#endif
/*
* Search for the biggest gap in the low 32 bits of the e820
Index: head-2006-05-03/arch/x86_64/kernel/setup-xen.c
===================================================================
--- head-2006-05-03.orig/arch/x86_64/kernel/setup-xen.c 2006-05-08
16:04:28.000000000 +0200
+++ head-2006-05-03/arch/x86_64/kernel/setup-xen.c 2006-05-08
16:11:01.000000000 +0200
@@ -88,9 +88,6 @@ EXPORT_SYMBOL(HYPERVISOR_shared_info);
extern char hypercall_page[PAGE_SIZE];
EXPORT_SYMBOL(hypercall_page);
-/* Allows setting of maximum possible memory size */
-unsigned long xen_override_max_pfn;
-
static int xen_panic_event(struct notifier_block *, unsigned long, void *);
static struct notifier_block xen_panic_block = {
xen_panic_event, NULL, 0 /* try to go last */
@@ -142,7 +139,9 @@ struct sys_desc_table_struct {
};
struct edid_info edid_info;
+#ifndef CONFIG_XEN
struct e820map e820;
+#endif
extern int root_mountflags;
@@ -321,7 +320,9 @@ static __init void parse_cmdline_early (
{
char c = ' ', *to = command_line, *from = COMMAND_LINE;
int len = 0;
+#ifndef CONFIG_XEN
int userdef = 0;
+#endif
for (;;) {
if (c != ' ')
@@ -401,6 +402,7 @@ static __init void parse_cmdline_early (
if (!memcmp(from, "mem=", 4))
parse_memopt(from+4, &from);
+#ifndef CONFIG_XEN
if (!memcmp(from, "memmap=", 7)) {
/* exactmap option is for used defined memory */
if (!memcmp(from+7, "exactmap", 8)) {
@@ -422,6 +424,7 @@ static __init void parse_cmdline_early (
userdef = 1;
}
}
+#endif
#ifdef CONFIG_NUMA
if (!memcmp(from, "numa=", 5))
@@ -481,10 +484,12 @@ static __init void parse_cmdline_early (
break;
*(to++) = c;
}
+#ifndef CONFIG_XEN
if (userdef) {
printk(KERN_INFO "user-defined physical RAM map:\n");
e820_print_map("user");
}
+#endif
*to = '\0';
*cmdline_p = command_line;
}
Index: head-2006-05-03/include/asm-i386/mach-xen/setup_arch_post.h
===================================================================
--- head-2006-05-03.orig/include/asm-i386/mach-xen/setup_arch_post.h
2006-04-24 11:43:43.000000000 +0200
+++ head-2006-05-03/include/asm-i386/mach-xen/setup_arch_post.h 2006-05-08
16:04:28.000000000 +0200
@@ -1,6 +1,4 @@
/**
- * machine_specific_memory_setup - Hook for machine specific memory setup.
- *
* Description:
* This is included late in kernel/setup.c so that it can make
* use of all of the static functions.
@@ -8,16 +8,6 @@
#include <xen/interface/callback.h>
-static char * __init machine_specific_memory_setup(void)
-{
- unsigned long max_pfn = xen_start_info->nr_pages;
-
- e820.nr_map = 0;
- add_memory_region(0, PFN_PHYS(max_pfn), E820_RAM);
-
- return "Xen";
-}
-
extern void hypervisor_callback(void);
extern void failsafe_callback(void);
extern void nmi(void);
Index: head-2006-05-03/include/asm-i386/mach-xen/setup_arch_pre.h
===================================================================
--- head-2006-05-03.orig/include/asm-i386/mach-xen/setup_arch_pre.h
2006-04-24 11:43:43.000000000 +0200
+++ head-2006-05-03/include/asm-i386/mach-xen/setup_arch_pre.h 2006-05-08
16:04:28.000000000 +0200
@@ -3,3 +3,9 @@
#define ARCH_SETUP machine_specific_arch_setup();
static void __init machine_specific_arch_setup(void);
+
+static inline char * machine_specific_memory_setup(void)
+{
+ return "Xen";
+}
+
------------------------------------------------------------------------
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