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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Fix SMP booting: x86/64 startup initialisation fixes and so on.
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 8d31f9a9c4232b8f9d0200d0a3d312170c197f63
# Parent e26f574eac9afa1196b1721a30f551e9fe745a3e
Fix SMP booting: x86/64 startup initialisation fixes and so on.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/i386/kernel/cpu/common.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/cpu/common.c Thu Aug 25
13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/cpu/common.c Thu Aug 25
13:27:10 2005
@@ -19,11 +19,13 @@
#include "cpu.h"
+#ifndef CONFIG_XEN
DEFINE_PER_CPU(struct desc_struct, cpu_gdt_table[GDT_ENTRIES]);
EXPORT_PER_CPU_SYMBOL(cpu_gdt_table);
DEFINE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
EXPORT_PER_CPU_SYMBOL(cpu_16bit_stack);
+#endif
static int cachesize_override __initdata = -1;
static int disable_x86_fxsr __initdata = 0;
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c Thu Aug 25
13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/smpboot.c Thu Aug 25
13:27:10 2005
@@ -131,15 +131,7 @@
*/
void __init smp_alloc_memory(void)
{
-#if 1
- int cpu;
-
- for (cpu = 1; cpu < NR_CPUS; cpu++) {
- cpu_gdt_descr[cpu].address = (unsigned long)
- alloc_bootmem_low_pages(PAGE_SIZE);
- /* XXX free unused pages later */
- }
-#else
+#if 0
trampoline_base = (void *) alloc_bootmem_low_pages(PAGE_SIZE);
/*
* Has to be in very low memory so we can execute
@@ -861,8 +853,8 @@
atomic_set(&init_deasserted, 0);
#if 1
- if (cpu_gdt_descr[0].size > PAGE_SIZE)
- BUG();
+ cpu_gdt_descr[cpu].address = __get_free_page(GFP_KERNEL);
+ BUG_ON(cpu_gdt_descr[0].size > PAGE_SIZE);
cpu_gdt_descr[cpu].size = cpu_gdt_descr[0].size;
printk("GDT: copying %d bytes from %lx to %lx\n",
cpu_gdt_descr[0].size, cpu_gdt_descr[0].address,
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/i386/kernel/traps.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/traps.c Thu Aug 25 13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/traps.c Thu Aug 25 13:27:10 2005
@@ -871,6 +871,7 @@
}
}
+#ifndef CONFIG_XEN
fastcall void setup_x86_bogus_stack(unsigned char * stk)
{
unsigned long *switch16_ptr, *switch32_ptr;
@@ -915,6 +916,7 @@
memcpy(stack32, stack16, len);
return stack32;
}
+#endif
/*
* 'math_state_restore()' saves the current math information in the
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/x86_64/kernel/early_printk.c
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/early_printk.c Thu Aug
25 13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/early_printk.c Thu Aug
25 13:27:10 2005
@@ -5,6 +5,8 @@
#include <linux/string.h>
#include <asm/io.h>
#include <asm/processor.h>
+
+#ifndef CONFIG_XEN
/* Simple VGA output */
@@ -59,7 +61,6 @@
.index = -1,
};
-#ifndef CONFIG_XEN
/* Serial functions loosely based on a similar package from Klaus P. Gerlicher
*/
static int early_serial_base = 0x3f8; /* ttyS0 */
@@ -148,7 +149,8 @@
outb((divisor >> 8) & 0xff, early_serial_base + DLH);
outb(c & ~DLAB, early_serial_base + LCR);
}
-#else
+
+#else /* CONFIG_XEN */
static void
early_serial_write(struct console *con, const char *s, unsigned count)
@@ -167,6 +169,13 @@
static __init void early_serial_init(char *s)
{
}
+
+/*
+ * No early VGA console on Xen, as we do not have convenient ISA-space
+ * mappings. Someone should fix this for domain 0. For now, use fake serial.
+ */
+#define early_vga_console early_serial_console
+
#endif
static struct console early_serial_console = {
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/x86_64/kernel/head.S
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/head.S Thu Aug 25
13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/head.S Thu Aug 25
13:27:10 2005
@@ -206,11 +206,13 @@
.quad 0,0,0 /* three TLS descriptors */
.quad 0 /* unused now? __KERNEL16_CS - 16bit
PM for S3 wakeup. */
-gdt_end:
+gdt_end:
+#if 0
/* asm/segment.h:GDT_ENTRIES must match this */
/* This should be a multiple of the cache line size */
/* GDTs of other CPUs: */
.fill (GDT_SIZE * NR_CPUS) - (gdt_end - cpu_gdt_table)
+#endif
.org 0x8000
ENTRY(empty_zero_page)
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c Thu Aug 25
13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c Thu Aug 25
13:27:10 2005
@@ -536,48 +536,7 @@
}
#endif
-#ifdef CONFIG_XEN
-#define reserve_ebda_region() void(0)
-
-static void __init print_memory_map(char *who)
-{
- int i;
-
- for (i = 0; i < e820.nr_map; i++) {
- early_printk(" %s: %016Lx - %016Lx ", who,
- e820.map[i].addr,
- e820.map[i].addr + e820.map[i].size);
- switch (e820.map[i].type) {
- case E820_RAM: early_printk("(usable)\n");
- break;
- case E820_RESERVED:
- early_printk("(reserved)\n");
- break;
- case E820_ACPI:
- early_printk("(ACPI data)\n");
- break;
- case E820_NVS:
- early_printk("(ACPI NVS)\n");
- break;
- default: early_printk("type %u\n", e820.map[i].type);
- break;
- }
- }
-}
-
-void __init smp_alloc_memory(void)
-{
- int cpu;
-
- for (cpu = 1; cpu < NR_CPUS; cpu++) {
- cpu_gdt_descr[cpu].address = (unsigned long)
- alloc_bootmem_low_pages(PAGE_SIZE);
- /* XXX free unused pages later */
- }
-}
-
-
-#else
+#ifndef CONFIG_XEN
#define EBDA_ADDR_POINTER 0x40E
static void __init reserve_ebda_region(void)
{
@@ -628,7 +587,6 @@
VMASST_TYPE_writable_pagetables);
ARCH_SETUP
- print_memory_map(machine_specific_memory_setup());
#else
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
drive_info = DRIVE_INFO;
@@ -743,9 +701,6 @@
initrd_start = 0;
}
}
-#endif
-#ifdef CONFIG_SMP
- smp_alloc_memory();
#endif
#else /* CONFIG_XEN */
#ifdef CONFIG_BLK_DEV_INITRD
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup64.c
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup64.c Thu Aug 25
13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup64.c Thu Aug 25
13:27:10 2005
@@ -286,10 +286,10 @@
memcpy(me->thread.tls_array, cpu_gdt_table[cpu], GDT_ENTRY_TLS_ENTRIES
* 8);
#else
- memcpy(me->thread.tls_array, &get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN],
+ memcpy(me->thread.tls_array, &get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN],
GDT_ENTRY_TLS_ENTRIES * 8);
- cpu_gdt_init(&cpu_gdt_descr[cpu]);
+ cpu_gdt_init(&cpu_gdt_descr[cpu]);
#endif
/*
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/x86_64/kernel/smpboot.c
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/smpboot.c Thu Aug 25
13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/smpboot.c Thu Aug 25
13:27:10 2005
@@ -739,8 +739,8 @@
atomic_set(&init_deasserted, 0);
#ifdef CONFIG_XEN
- if (cpu_gdt_descr[0].size > PAGE_SIZE)
- BUG();
+ cpu_gdt_descr[cpu].address = __get_free_page(GFP_KERNEL);
+ BUG_ON(cpu_gdt_descr[0].size > PAGE_SIZE);
cpu_gdt_descr[cpu].size = cpu_gdt_descr[0].size;
memcpy((void *)cpu_gdt_descr[cpu].address,
(void *)cpu_gdt_descr[0].address, cpu_gdt_descr[0].size);
@@ -798,6 +798,8 @@
ctxt.ctrlreg[3] = virt_to_mfn(init_level4_pgt) << PAGE_SHIFT;
boot_error = HYPERVISOR_boot_vcpu(cpu, &ctxt);
+ if (boot_error)
+ printk("boot error: %ld\n", boot_error);
if (!boot_error) {
/*
diff -r e26f574eac9a -r 8d31f9a9c423
linux-2.6-xen-sparse/arch/xen/x86_64/mm/init.c
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/mm/init.c Thu Aug 25 13:26:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/mm/init.c Thu Aug 25 13:27:10 2005
@@ -536,70 +536,38 @@
round_up(ptes * 8, PAGE_SIZE);
}
-static void xen_copy_pt(void)
-{
- unsigned long va = __START_KERNEL_map;
- unsigned long addr, *pte_page;
+void __init xen_init_pt(void)
+{
+ unsigned long addr, *page;
int i;
- pud_t *pud; pmd_t *pmd; pte_t *pte;
- unsigned long *page = (unsigned long *) init_level4_pgt;
-
- addr = (unsigned long) page[pgd_index(va)];
+
+ for (i = 0; i < NR_CPUS; i++)
+ per_cpu(cur_pgd, i) = init_mm.pgd;
+
+ memset((void *)init_level4_pgt, 0, PAGE_SIZE);
+ memset((void *)level3_kernel_pgt, 0, PAGE_SIZE);
+ memset((void *)level2_kernel_pgt, 0, PAGE_SIZE);
+
+ /* Find the initial pte page that was built for us. */
+ page = (unsigned long *)xen_start_info.pt_base;
+ addr = page[pgd_index(__START_KERNEL_map)];
addr_to_page(addr, page);
-
- pud = (pud_t *) &page[pud_index(va)];
- addr = page[pud_index(va)];
+ addr = page[pud_index(__START_KERNEL_map)];
addr_to_page(addr, page);
- level3_kernel_pgt[pud_index(va)] =
- __pud(__pa_symbol(level2_kernel_pgt) | _KERNPG_TABLE |
_PAGE_USER);
-
- for (;;) {
- pmd = (pmd_t *) &page[pmd_index(va)];
- if (pmd_present(*pmd)) {
- level2_kernel_pgt[pmd_index(va)] = *pmd;
- /*
- * if pmd is valid, check pte.
- */
- addr = page[pmd_index(va)];
- addr_to_page(addr, pte_page);
-
- for (i = 0; i < PTRS_PER_PTE; i++) {
- pte = (pte_t *) &pte_page[pte_index(va)];
- if (pte_present(*pte))
- va += PAGE_SIZE;
- else
- break;
- }
-
- } else
- break;
- }
-
+ /* Construct mapping of initial pte page in our own directories. */
init_level4_pgt[pgd_index(__START_KERNEL_map)] =
mk_kernel_pgd(__pa_symbol(level3_kernel_pgt));
-}
-
-void __init xen_init_pt(void)
-{
- int i;
-
- for (i = 0; i < NR_CPUS; i++)
- per_cpu(cur_pgd, i) = init_mm.pgd;
-
- memcpy((void *)init_level4_pgt,
- (void *)xen_start_info.pt_base, PAGE_SIZE);
-
- memset((void *)level3_kernel_pgt, 0, PAGE_SIZE);
- memset((void *)level2_kernel_pgt, 0, PAGE_SIZE);
-
- xen_copy_pt();
+ level3_kernel_pgt[pud_index(__START_KERNEL_map)] =
+ __pud(__pa_symbol(level2_kernel_pgt) |
+ _KERNPG_TABLE | _PAGE_USER);
+ memcpy((void *)level2_kernel_pgt, page, PAGE_SIZE);
make_page_readonly(init_level4_pgt);
+ make_page_readonly(init_level4_user_pgt);
make_page_readonly(level3_kernel_pgt);
+ make_page_readonly(level3_user_pgt);
make_page_readonly(level2_kernel_pgt);
- make_page_readonly(init_level4_user_pgt);
- make_page_readonly(level3_user_pgt); /* for vsyscall stuff */
xen_pgd_pin(__pa_symbol(init_level4_pgt));
xen_pgd_pin(__pa_symbol(init_level4_user_pgt));
@@ -609,7 +577,6 @@
set_pgd((pgd_t *)(init_level4_user_pgt + 511),
mk_kernel_pgd(__pa_symbol(level3_user_pgt)));
-
}
/*
@@ -617,69 +584,58 @@
* mapping done by Xen is minimal (e.g. 8MB) and we need to extend the
* mapping for early initialization.
*/
-
-#define MIN_INIT_SIZE 0x800000
static unsigned long current_size, extended_size;
void __init extend_init_mapping(void)
{
unsigned long va = __START_KERNEL_map;
- unsigned long addr, *pte_page;
-
- unsigned long phys;
+ unsigned long phys, addr, *pte_page;
pmd_t *pmd;
pte_t *pte, new_pte;
unsigned long *page = (unsigned long *) init_level4_pgt;
int i;
- addr = (unsigned long) page[pgd_index(va)];
+ addr = page[pgd_index(va)];
addr_to_page(addr, page);
-
addr = page[pud_index(va)];
addr_to_page(addr, page);
for (;;) {
+ pmd = (pmd_t *)&page[pmd_index(va)];
+ if (!pmd_present(*pmd))
+ break;
+ addr = page[pmd_index(va)];
+ addr_to_page(addr, pte_page);
+ for (i = 0; i < PTRS_PER_PTE; i++) {
+ pte = (pte_t *) &pte_page[pte_index(va)];
+ if (!pte_present(*pte))
+ break;
+ va += PAGE_SIZE;
+ current_size += PAGE_SIZE;
+ }
+ }
+
+ while (va < __START_KERNEL_map + current_size + tables_space) {
pmd = (pmd_t *) &page[pmd_index(va)];
- if (pmd_present(*pmd)) {
- /*
- * if pmd is valid, check pte.
- */
- addr = page[pmd_index(va)];
- addr_to_page(addr, pte_page);
-
- for (i = 0; i < PTRS_PER_PTE; i++) {
- pte = (pte_t *) &pte_page[pte_index(va)];
-
- if (pte_present(*pte)) {
- va += PAGE_SIZE;
- current_size += PAGE_SIZE;
- } else
- break;
- }
-
- } else
- break;
- }
-
- for (; va < __START_KERNEL_map + current_size + tables_space; ) {
- pmd = (pmd_t *) &page[pmd_index(va)];
-
- if (pmd_none(*pmd)) {
- pte_page = (unsigned long *) alloc_static_page(&phys);
- make_page_readonly(pte_page);
- xen_pte_pin(phys);
- set_pmd(pmd, __pmd(phys | _KERNPG_TABLE | _PAGE_USER));
-
- for (i = 0; i < PTRS_PER_PTE; i++, va += PAGE_SIZE) {
- new_pte = pfn_pte((va - __START_KERNEL_map) >>
PAGE_SHIFT,
- __pgprot(_KERNPG_TABLE |
_PAGE_USER));
-
- pte = (pte_t *) &pte_page[pte_index(va)];
- xen_l1_entry_update(pte, new_pte);
- extended_size += PAGE_SIZE;
- }
- }
- }
+ if (!pmd_none(*pmd))
+ continue;
+ pte_page = (unsigned long *) alloc_static_page(&phys);
+ make_page_readonly(pte_page);
+ xen_pte_pin(phys);
+ set_pmd(pmd, __pmd(phys | _KERNPG_TABLE | _PAGE_USER));
+ for (i = 0; i < PTRS_PER_PTE; i++, va += PAGE_SIZE) {
+ new_pte = pfn_pte(
+ (va - __START_KERNEL_map) >> PAGE_SHIFT,
+ __pgprot(_KERNPG_TABLE | _PAGE_USER));
+ pte = (pte_t *)&pte_page[pte_index(va)];
+ xen_l1_entry_update(pte, new_pte);
+ extended_size += PAGE_SIZE;
+ }
+ }
+
+ /* Kill mapping of low 1MB. */
+ for (va = __START_KERNEL_map; va < (unsigned long)&_text; va +=
PAGE_SIZE)
+ HYPERVISOR_update_va_mapping(va, __pte_ma(0), 0);
}
@@ -719,10 +675,6 @@
table_end<<PAGE_SHIFT);
start_pfn = ((current_size + extended_size) >> PAGE_SHIFT);
-
- /*
- * TBD: Need to calculate at runtime
- */
__flush_tlb_all();
init_mapping_done = 1;
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