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Actually create the double fault stack page for AP cpus so that we have a

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chance of getting a working double fault instead of converting it to an
instant triple fault reset.
This commit is contained in:
Peter Wemm 2005-07-21 21:46:09 +00:00
parent e58d779daa
commit 84d7e08229
1 changed files with 6 additions and 1 deletions
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7
sys/amd64/amd64/mp_machdep.c
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@ -95,6 +95,9 @@ static int bootAP;
/* Free these after use */ /* Free these after use */
void *bootstacks[MAXCPU]; void *bootstacks[MAXCPU];
/* Temporary holder for double fault stack */
char *doublefault_stack;
/* Hotwire a 0->4MB V==P mapping */ /* Hotwire a 0->4MB V==P mapping */
extern pt_entry_t *KPTphys; extern pt_entry_t *KPTphys;
@ -432,6 +435,7 @@ init_secondary(void)
common_tss[cpu] = common_tss[0]; common_tss[cpu] = common_tss[0];
common_tss[cpu].tss_rsp0 = 0; /* not used until after switch */ common_tss[cpu].tss_rsp0 = 0; /* not used until after switch */
common_tss[cpu].tss_iobase = sizeof(struct amd64tss); common_tss[cpu].tss_iobase = sizeof(struct amd64tss);
common_tss[cpu].tss_ist1 = (long)&doublefault_stack[PAGE_SIZE];
gdt_segs[GPROC0_SEL].ssd_base = (long) &common_tss[cpu]; gdt_segs[GPROC0_SEL].ssd_base = (long) &common_tss[cpu];
ssdtosyssd(&gdt_segs[GPROC0_SEL], ssdtosyssd(&gdt_segs[GPROC0_SEL],
@ -679,7 +683,8 @@ start_all_aps(void)
cpu_apic_ids[cpu] = apic_id; cpu_apic_ids[cpu] = apic_id;
/* allocate and set up an idle stack data page */ /* allocate and set up an idle stack data page */
bootstacks[cpu] = (char *)kmem_alloc(kernel_map, KSTACK_PAGES * PAGE_SIZE); bootstacks[cpu] = (void *)kmem_alloc(kernel_map, KSTACK_PAGES * PAGE_SIZE);
doublefault_stack = (char *)kmem_alloc(kernel_map, PAGE_SIZE);
bootSTK = (char *)bootstacks[cpu] + KSTACK_PAGES * PAGE_SIZE - 8; bootSTK = (char *)bootstacks[cpu] + KSTACK_PAGES * PAGE_SIZE - 8;
bootAP = cpu; bootAP = cpu;