* Li, Xin B (xin.b.li@xxxxxxxxx) wrote:
> Chris, I'm here working on x86_64 SMP support too, can you send me your
> patch?
> I'm using your previous patch, and get some page faults while boot the
> secondary CPU.
Yes, here it is, there's only one line change (sorry, I thought this
change was in the last one). This should get you to faulting on the
first CPU (which is actually progress ;-). I think the second CPU is
happliy idling in cpu_idle, and the first one is back to finishing up
booting when it dies.
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
/*
Index: xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/setup64.c
===================================================================
--- xen-unstable.orig/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/setup64.c
+++ xen-unstable/linux-2.6.11-xen-sparse/arch/xen/x86_64/kernel/setup64.c
@@ -264,13 +264,13 @@ void __init cpu_init (void)
* Initialize the per-CPU GDT with the boot GDT,
* and set up the GDT descriptor:
*/
+#if 0
if (cpu) {
memcpy(cpu_gdt_table[cpu], cpu_gdt_table[0], GDT_SIZE);
}
cpu_gdt_descr[cpu].size = GDT_SIZE;
cpu_gdt_descr[cpu].address = (unsigned long)cpu_gdt_table[cpu];
-#if 0
asm volatile("lgdt %0" :: "m" (cpu_gdt_descr[cpu]));
asm volatile("lidt %0" :: "m" (idt_descr));
#endif
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