* Chris Wright (chrisw@xxxxxxxx) wrote:
> * Nakajima, Jun (jun.nakajima@xxxxxxxxx) wrote:
> > Good progress and good start, i.e. we have at least one virutal
> > processor there :-).
> >
> > We'll look at the problem too.
>
> Great, thanks. I'm pretty suspect of the gdt, but only on a hunch.
> Any clues why the copy is faulting might be useful.
Here's an updated patch that fixes that faulting. It uses gdt per page
like i386 is doing, still crashing upon schedule. Why does each gdt
entry need it's own page?
thanks,
-chris
--
===== linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/Makefile 1.5 vs edited
=====
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/Makefile
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/Makefile
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/Makefile
@@ -25,7 +25,7 @@ obj-$(CONFIG_ACPI_BOOT) += acpi/
obj-$(CONFIG_X86_MSR) += msr.o
obj-$(CONFIG_MICROCODE) += microcode.o
obj-$(CONFIG_X86_CPUID) += cpuid.o
-#obj-$(CONFIG_SMP) += smp.o smpboot.o trampoline.o
+obj-$(CONFIG_SMP) += smp.o smpboot.o trampoline.o
obj-$(CONFIG_X86_LOCAL_APIC) += apic.o
c-obj-$(CONFIG_X86_LOCAL_APIC) += nmi.o
obj-$(CONFIG_X86_IO_APIC) += io_apic.o mpparse.o
@@ -53,7 +53,7 @@ intel_cacheinfo-y += ../../../i386/kern
quirks-y += ../../../i386/kernel/quirks.o
c-link := init_task.o
-s-link := vsyscall.o
+s-link := vsyscall.o trampoline.o
$(patsubst %.o,$(obj)/%.c,$(c-obj-y) $(c-link)) $(patsubst
%.o,$(obj)/%.S,$(s-obj-y) $(s-link)):
ln -fsn $(srctree)/arch/x86_64/kernel/$(notdir $@) $@
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/smp.c
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/smp.c
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/smp.c
@@ -24,8 +24,13 @@
#include <asm/mtrr.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
+#if 1 /* Xen */
#include <asm/mach_apic.h>
+#endif
#include <asm/proto.h>
+#include <asm-xen/evtchn.h>
+
+#define xxprint(msg) HYPERVISOR_console_io(CONSOLEIO_write, strlen(msg), msg)
/*
* Smarter SMP flushing macros.
@@ -101,6 +106,7 @@ static inline void leave_mm (unsigned lo
* 2) Leave the mm if we are in the lazy tlb mode.
*/
+#if 0 /* Xen */
asmlinkage void smp_invalidate_interrupt (void)
{
unsigned long cpu;
@@ -249,6 +255,20 @@ void flush_tlb_all(void)
on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
}
+#else
+asmlinkage void smp_invalidate_interrupt (void)
+{ return; }
+void flush_tlb_current_task(void)
+{ xen_tlb_flush_mask(¤t->mm->cpu_vm_mask); }
+void flush_tlb_mm (struct mm_struct * mm)
+{ xen_tlb_flush_mask(&mm->cpu_vm_mask); }
+void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
+{ xen_invlpg_mask(&vma->vm_mm->cpu_vm_mask, va); }
+void flush_tlb_all(void)
+{ xen_tlb_flush_all(); }
+#endif /* Xen */
+
+
void smp_kdb_stop(void)
{
send_IPI_allbutself(KDB_VECTOR);
@@ -308,13 +328,13 @@ static void __smp_call_function (void (*
/* Wait for response */
while (atomic_read(&data.started) != cpus)
- cpu_relax();
+ barrier();
if (!wait)
return;
while (atomic_read(&data.finished) != cpus)
- cpu_relax();
+ barrier();
}
/*
@@ -348,7 +368,11 @@ void smp_stop_cpu(void)
*/
cpu_clear(smp_processor_id(), cpu_online_map);
local_irq_disable();
+#if 1
+ xxprint("stop_this_cpu disable_local_APIC\n");
+#else
disable_local_APIC();
+#endif
local_irq_enable();
}
@@ -362,8 +386,10 @@ static void smp_really_stop_cpu(void *du
void smp_send_stop(void)
{
int nolock = 0;
+#if 0
if (reboot_force)
return;
+#endif
/* Don't deadlock on the call lock in panic */
if (!spin_trylock(&call_lock)) {
/* ignore locking because we have paniced anyways */
@@ -380,18 +406,17 @@ void smp_send_stop(void)
* all the work is done automatically when
* we return from the interrupt.
*/
-asmlinkage void smp_reschedule_interrupt(void)
+asmlinkage irqreturn_t smp_reschedule_interrupt(void)
{
- ack_APIC_irq();
+ return IRQ_HANDLED;
}
-asmlinkage void smp_call_function_interrupt(void)
+asmlinkage irqreturn_t smp_call_function_interrupt(void)
{
void (*func) (void *info) = call_data->func;
void *info = call_data->info;
int wait = call_data->wait;
- ack_APIC_irq();
/*
* Notify initiating CPU that I've grabbed the data and am
* about to execute the function
@@ -408,4 +433,6 @@ asmlinkage void smp_call_function_interr
mb();
atomic_inc(&call_data->finished);
}
+
+ return IRQ_HANDLED;
}
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/smpboot.c
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/smpboot.c
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/smpboot.c
@@ -53,6 +53,7 @@
#include <asm/kdebug.h>
#include <asm/tlbflush.h>
#include <asm/proto.h>
+#include <asm/arch_hooks.h>
/* Number of siblings per CPU package */
int smp_num_siblings = 1;
@@ -75,6 +76,7 @@ int smp_threads_ready;
cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
+#if 0
/*
* Trampoline 80x86 program as an array.
*/
@@ -96,6 +98,7 @@ static unsigned long __init setup_trampo
memcpy(tramp, trampoline_data, trampoline_end - trampoline_data);
return virt_to_phys(tramp);
}
+#endif
/*
* The bootstrap kernel entry code has set these up. Save them for
@@ -110,6 +113,7 @@ static void __init smp_store_cpu_info(in
identify_cpu(c);
}
+#if 0
/*
* TSC synchronization.
*
@@ -246,6 +250,7 @@ static void __init synchronize_tsc_ap (v
}
}
#undef NR_LOOPS
+#endif
static atomic_t init_deasserted;
@@ -254,6 +259,7 @@ void __init smp_callin(void)
int cpuid, phys_id;
unsigned long timeout;
+#if 0
/*
* If waken up by an INIT in an 82489DX configuration
* we may get here before an INIT-deassert IPI reaches
@@ -261,11 +267,12 @@ void __init smp_callin(void)
* lock up on an APIC access.
*/
while (!atomic_read(&init_deasserted));
+#endif
/*
* (This works even if the APIC is not enabled.)
*/
- phys_id = GET_APIC_ID(apic_read(APIC_ID));
+ phys_id = smp_processor_id();
cpuid = smp_processor_id();
if (cpu_isset(cpuid, cpu_callin_map)) {
panic("smp_callin: phys CPU#%d, CPU#%d already present??\n",
@@ -299,6 +306,7 @@ void __init smp_callin(void)
cpuid);
}
+#if 0
/*
* the boot CPU has finished the init stage and is spinning
* on callin_map until we finish. We are free to set up this
@@ -308,6 +316,7 @@ void __init smp_callin(void)
Dprintk("CALLIN, before setup_local_APIC().\n");
setup_local_APIC();
+#endif
local_irq_enable();
@@ -317,7 +326,9 @@ void __init smp_callin(void)
calibrate_delay();
Dprintk("Stack at about %p\n",&cpuid);
+#if 0
disable_APIC_timer();
+#endif
/*
* Save our processor parameters
@@ -331,15 +342,39 @@ void __init smp_callin(void)
*/
cpu_set(cpuid, cpu_callin_map);
+#if 0
/*
* Synchronize the TSC with the BP
*/
if (cpu_has_tsc)
synchronize_tsc_ap();
+#endif
}
int cpucount;
+#include <linux/interrupt.h>
+static irqreturn_t ldebug_interrupt(
+ int irq, void *dev_id, struct pt_regs *regs)
+{
+ return IRQ_HANDLED;
+}
+
+static DEFINE_PER_CPU(int, ldebug_irq);
+static char ldebug_name[NR_CPUS][15];
+
+void ldebug_setup(void)
+{
+ int cpu = smp_processor_id();
+
+ per_cpu(ldebug_irq, cpu) = bind_virq_to_irq(VIRQ_DEBUG);
+ sprintf(ldebug_name[cpu], "ldebug%d", cpu);
+ BUG_ON(request_irq(per_cpu(ldebug_irq, cpu), ldebug_interrupt,
+ SA_INTERRUPT, ldebug_name[cpu], NULL));
+}
+
+extern void local_setup_timer(void);
+
/*
* Activate a secondary processor.
*/
@@ -360,6 +395,7 @@ void __init start_secondary(void)
while (!cpu_isset(smp_processor_id(), smp_commenced_mask))
rep_nop();
+#if 0
Dprintk("cpu %d: setting up apic clock\n", smp_processor_id());
setup_secondary_APIC_clock();
@@ -373,6 +409,12 @@ void __init start_secondary(void)
enable_APIC_timer();
+#else
+ local_setup_timer();
+ ldebug_setup();
+ smp_intr_init();
+ local_irq_enable();
+#endif
/*
* low-memory mappings have been cleared, flush them from
@@ -428,6 +470,7 @@ static inline void inquire_remote_apic(i
}
#endif
+#if 0
static int __init wakeup_secondary_via_INIT(int phys_apicid, unsigned int
start_rip)
{
unsigned long send_status = 0, accept_status = 0;
@@ -550,6 +593,7 @@ static int __init wakeup_secondary_via_I
return (send_status | accept_status);
}
+#endif
static void __init do_boot_cpu (int apicid)
{
@@ -557,6 +601,14 @@ static void __init do_boot_cpu (int apic
unsigned long boot_error;
int timeout, cpu;
unsigned long start_rip;
+#if 1
+ vcpu_guest_context_t ctxt;
+ extern void startup_64_smp(void);
+ extern void hypervisor_callback(void);
+ extern void failsafe_callback(void);
+ extern void smp_trap_init(trap_info_t *);
+ int i;
+#endif
cpu = ++cpucount;
/*
@@ -570,7 +622,7 @@ static void __init do_boot_cpu (int apic
cpu_pda[cpu].pcurrent = idle;
- start_rip = setup_trampoline();
+ start_rip = (unsigned long)startup_64_smp;
init_rsp = idle->thread.rsp;
per_cpu(init_tss,cpu).rsp0 = init_rsp;
@@ -587,6 +639,94 @@ static void __init do_boot_cpu (int apic
atomic_set(&init_deasserted, 0);
+#if 1
+ if (cpu_gdt_descr[0].size > PAGE_SIZE)
+ BUG();
+ 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);
+
+ memset(&ctxt, 0, sizeof(ctxt));
+
+ ctxt.flags = VGCF_IN_KERNEL;
+ ctxt.user_regs.ds = __USER_DS;
+ ctxt.user_regs.es = __USER_DS;
+ ctxt.user_regs.fs = 0;
+ ctxt.user_regs.gs = 0;
+ ctxt.user_regs.ss = __KERNEL_DS|0x3;
+ ctxt.user_regs.cs = __KERNEL_CS|0x3;
+ ctxt.user_regs.rip = start_rip;
+ ctxt.user_regs.rsp = idle->thread.rsp;
+ ctxt.user_regs.eflags = (1<<9) | (1<<2) | (idle->thread.io_pl<<12);
+
+ /* FPU is set up to default initial state. */
+ memset(&ctxt.fpu_ctxt, 0, sizeof(ctxt.fpu_ctxt));
+
+ /* Virtual IDT is empty at start-of-day. */
+ for ( i = 0; i < 256; i++ )
+ {
+ ctxt.trap_ctxt[i].vector = i;
+ ctxt.trap_ctxt[i].cs = FLAT_KERNEL_CS;
+ }
+ smp_trap_init(ctxt.trap_ctxt);
+
+ /* No LDT. */
+ ctxt.ldt_ents = 0;
+
+ {
+ unsigned long va;
+ int f;
+
+ for (va = cpu_gdt_descr[cpu].address, f = 0;
+ va < cpu_gdt_descr[cpu].address + cpu_gdt_descr[cpu].size;
+ va += PAGE_SIZE, f++) {
+ ctxt.gdt_frames[f] = virt_to_machine(va) >> PAGE_SHIFT;
+ make_page_readonly((void *)va);
+ }
+ ctxt.gdt_ents = GDT_ENTRIES;
+ }
+
+ /* Ring 1 stack is the initial stack. */
+ ctxt.kernel_ss = __KERNEL_DS;
+ ctxt.kernel_sp = idle->thread.rsp;
+
+ /* Callback handlers. */
+ ctxt.event_callback_eip = (unsigned long)hypervisor_callback;
+ ctxt.failsafe_callback_eip = (unsigned long)failsafe_callback;
+
+ ctxt.ctrlreg[3] = (unsigned long)virt_to_machine(init_level4_pgt);
+
+ boot_error = HYPERVISOR_boot_vcpu(cpu, &ctxt);
+
+ if (!boot_error) {
+ /*
+ * allow APs to start initializing.
+ */
+ Dprintk("Before Callout %d.\n", cpu);
+ cpu_set(cpu, cpu_callout_map);
+ Dprintk("After Callout %d.\n", cpu);
+
+ /*
+ * Wait 5s total for a response
+ */
+ for (timeout = 0; timeout < 50000; timeout++) {
+ if (cpu_isset(cpu, cpu_callin_map))
+ break; /* It has booted */
+ udelay(100);
+ }
+
+ if (cpu_isset(cpu, cpu_callin_map)) {
+ /* number CPUs logically, starting from 1 (BSP is 0) */
+ Dprintk("OK.\n");
+ printk("CPU%d: ", cpu);
+ print_cpu_info(&cpu_data[cpu]);
+ Dprintk("CPU has booted.\n");
+ } else {
+ boot_error= 1;
+ }
+ }
+ x86_cpu_to_apicid[cpu] = apicid;
+#else
Dprintk("Setting warm reset code and vector.\n");
CMOS_WRITE(0xa, 0xf);
@@ -652,6 +792,7 @@ static void __init do_boot_cpu (int apic
#endif
}
}
+#endif
if (boot_error) {
cpu_clear(cpu, cpu_callout_map); /* was set here
(do_boot_cpu()) */
clear_bit(cpu, &cpu_initialized); /* was set by cpu_init() */
@@ -709,9 +850,15 @@ static void smp_tune_scheduling (void)
* Cycle through the processors sending APIC IPIs to boot each.
*/
+/* XXX fix me */
+#define time_init_smp()
+
static void __init smp_boot_cpus(unsigned int max_cpus)
{
- unsigned apicid, cpu, bit, kicked;
+ unsigned cpu, kicked;
+#if 0
+ unsigned apicid, bit;
+#endif
nmi_watchdog_default();
@@ -725,11 +872,13 @@ static void __init smp_boot_cpus(unsigne
current_thread_info()->cpu = 0;
smp_tune_scheduling();
+#if 0
if (!physid_isset(hard_smp_processor_id(), phys_cpu_present_map)) {
printk("weird, boot CPU (#%d) not listed by the BIOS.\n",
hard_smp_processor_id());
physid_set(hard_smp_processor_id(), phys_cpu_present_map);
}
+#endif
/*
* If we couldn't find an SMP configuration at boot time,
@@ -739,13 +888,16 @@ static void __init smp_boot_cpus(unsigne
printk(KERN_NOTICE "SMP motherboard not detected.\n");
io_apic_irqs = 0;
cpu_online_map = cpumask_of_cpu(0);
+#if 0
phys_cpu_present_map = physid_mask_of_physid(0);
+#endif
if (APIC_init_uniprocessor())
printk(KERN_NOTICE "Local APIC not detected."
" Using dummy APIC emulation.\n");
goto smp_done;
}
+#if 0
/*
* Should not be necessary because the MP table should list the boot
* CPU too, but we do it for the sake of robustness anyway.
@@ -771,51 +923,50 @@ static void __init smp_boot_cpus(unsigne
}
verify_local_APIC();
+#endif
/*
* If SMP should be disabled, then really disable it!
*/
if (!max_cpus) {
- smp_found_config = 0;
+ HYPERVISOR_shared_info->n_vcpu = 1;
printk(KERN_INFO "SMP mode deactivated, forcing use of dummy
APIC emulation.\n");
io_apic_irqs = 0;
cpu_online_map = cpumask_of_cpu(0);
+#if 0
phys_cpu_present_map = physid_mask_of_physid(0);
+#endif
disable_apic = 1;
goto smp_done;
}
+ smp_intr_init();
+
+#if 0
connect_bsp_APIC();
setup_local_APIC();
if (GET_APIC_ID(apic_read(APIC_ID)) != boot_cpu_id)
BUG();
+#endif
x86_cpu_to_apicid[0] = boot_cpu_id;
/*
* Now scan the CPU present map and fire up the other CPUs.
*/
- Dprintk("CPU present map: %lx\n", physids_coerce(phys_cpu_present_map));
+ Dprintk("CPU present map: %lx\n", HYPERVISOR_shared_info->n_vcpu)
kicked = 1;
- for (bit = 0; kicked < NR_CPUS && bit < MAX_APICS; bit++) {
- apicid = cpu_present_to_apicid(bit);
- /*
- * Don't even attempt to start the boot CPU!
- */
- if (apicid == boot_cpu_id || (apicid == BAD_APICID))
- continue;
-
- if (!physid_isset(apicid, phys_cpu_present_map))
+ for (cpu = 1; kicked < NR_CPUS &&
+ cpu < HYPERVISOR_shared_info->n_vcpu; cpu++) {
+ if (max_cpus <= cpucount+1)
continue;
- if ((max_cpus >= 0) && (max_cpus <= cpucount+1))
- continue;
-
- do_boot_cpu(apicid);
+ do_boot_cpu(cpu);
++kicked;
}
+#if 0
/*
* Cleanup possible dangling ends...
*/
@@ -833,6 +984,7 @@ static void __init smp_boot_cpus(unsigne
*((volatile int *) phys_to_virt(0x467)) = 0;
}
+#endif
/*
* Allow the user to impress friends.
@@ -899,6 +1051,7 @@ static void __init smp_boot_cpus(unsigne
else
nr_ioapics = 0;
+#if 0
setup_boot_APIC_clock();
/*
@@ -906,6 +1059,7 @@ static void __init smp_boot_cpus(unsigne
*/
if (cpu_has_tsc && cpucount)
synchronize_tsc_bp();
+#endif
smp_done:
time_init_smp();
@@ -950,9 +1104,36 @@ int __devinit __cpu_up(unsigned int cpu)
void __init smp_cpus_done(unsigned int max_cpus)
{
+#if 0
#ifdef CONFIG_X86_IO_APIC
setup_ioapic_dest();
#endif
zap_low_mappings();
+#endif
}
+extern irqreturn_t smp_reschedule_interrupt(int, void *, struct pt_regs *);
+extern irqreturn_t smp_call_function_interrupt(int, void *, struct pt_regs *);
+
+static DEFINE_PER_CPU(int, resched_irq);
+static DEFINE_PER_CPU(int, callfunc_irq);
+static char resched_name[NR_CPUS][15];
+static char callfunc_name[NR_CPUS][15];
+
+void __init smp_intr_init(void)
+{
+ int cpu = smp_processor_id();
+
+ per_cpu(resched_irq, cpu) =
+ bind_ipi_on_cpu_to_irq(cpu, RESCHEDULE_VECTOR);
+ sprintf(resched_name[cpu], "resched%d", cpu);
+ BUG_ON(request_irq(per_cpu(resched_irq, cpu), smp_reschedule_interrupt,
+ SA_INTERRUPT, resched_name[cpu], NULL));
+
+ per_cpu(callfunc_irq, cpu) =
+ bind_ipi_on_cpu_to_irq(cpu, CALL_FUNCTION_VECTOR);
+ sprintf(callfunc_name[cpu], "callfunc%d", cpu);
+ BUG_ON(request_irq(per_cpu(callfunc_irq, cpu),
+ smp_call_function_interrupt,
+ SA_INTERRUPT, callfunc_name[cpu], NULL));
+}
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/traps.c
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/traps.c
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/traps.c
@@ -957,6 +957,17 @@ void __init trap_init(void)
cpu_init();
}
+void smp_trap_init(trap_info_t *trap_ctxt)
+{
+ trap_info_t *t = trap_table;
+
+ for (t = trap_table; t->address; t++) {
+ trap_ctxt[t->vector].flags = t->flags;
+ trap_ctxt[t->vector].cs = t->cs;
+ trap_ctxt[t->vector].address = t->address;
+ }
+}
+
/* Actual parsing is done early in setup.c. */
static int __init oops_dummy(char *s)
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/xen_entry.S
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/xen_entry.S
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/xen_entry.S
@@ -8,11 +8,14 @@
#define sizeof_vcpu_shift 3
#ifdef CONFIG_SMP
-#define preempt_disable(reg) incl threadinfo_preempt_count(reg)
-#define preempt_enable(reg) decl threadinfo_preempt_count(reg)
+//#define preempt_disable(reg) incl threadinfo_preempt_count(reg)
+//#define preempt_enable(reg) decl threadinfo_preempt_count(reg)
+#define preempt_disable(reg)
+#define preempt_enable(reg)
#define XEN_GET_VCPU_INFO(reg) preempt_disable(%rbp) ; \
movq %gs:pda_cpunumber,reg ; \
- shl $sizeof_vcpu_shift,reg ; \
+ shl $32, reg ; \
+ shr $32-sizeof_vcpu_shift,reg ; \
addq HYPERVISOR_shared_info,reg
#define XEN_PUT_VCPU_INFO(reg) preempt_enable(%rbp) ; \
#define XEN_PUT_VCPU_INFO_fixup .byte 0xff,0xff,0xff
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/irq.c
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/irq.c
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/irq.c
@@ -20,7 +20,11 @@
*/
atomic_t irq_err_count;
-
+#ifdef CONFIG_X86_IO_APIC
+#ifdef APIC_MISMATCH_DEBUG
+atomic_t irq_mis_count;
+#endif
+#endif
/*
* Generic, controller-independent functions:
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/head.S
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/head.S
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/head.S
@@ -41,7 +41,6 @@
.code64
ENTRY(_start)
cld
- movq init_rsp(%rip),%rsp
/* Copy the necessary stuff from xen_start_info structure. */
movq $xen_start_info_union,%rdi
movq $64,%rcx /* sizeof (union xen_start_info_union) / sizeof
(long) */
@@ -52,6 +51,7 @@ ENTRY(_start)
cld
#endif /* CONFIG_SMP */
+ movq init_rsp(%rip),%rsp
/* zero EFLAGS after setting rsp */
pushq $0
popfq
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/setup.c
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/setup.c
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/setup.c
@@ -601,6 +601,17 @@ static void __init print_memory_map(char
}
}
+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 */
+ }
+}
+
void __init setup_arch(char **cmdline_p)
{
unsigned long low_mem_size;
@@ -742,6 +753,9 @@ void __init setup_arch(char **cmdline_p)
}
}
#endif
+#ifdef CONFIG_SMP
+ smp_alloc_memory();
+#endif
paging_init();
#ifdef CONFIG_X86_LOCAL_APIC
/*
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