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fc5fee86bd
It turns out that a PV domU also requires the "Xen PV" APIC driver. Otherwise, the flat driver is used and we get stuck in busy loops that never exit, such as in this stack trace: (gdb) target remote localhost:9999 Remote debugging using localhost:9999 __xapic_wait_icr_idle () at ./arch/x86/include/asm/ipi.h:56 56 while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY) (gdb) bt #0 __xapic_wait_icr_idle () at ./arch/x86/include/asm/ipi.h:56 #1 __default_send_IPI_shortcut (shortcut=<optimized out>, dest=<optimized out>, vector=<optimized out>) at ./arch/x86/include/asm/ipi.h:75 #2 apic_send_IPI_self (vector=246) at arch/x86/kernel/apic/probe_64.c:54 #3 0xffffffff81011336 in arch_irq_work_raise () at arch/x86/kernel/irq_work.c:47 #4 0xffffffff8114990c in irq_work_queue (work=0xffff88000fc0e400) at kernel/irq_work.c:100 #5 0xffffffff8110c29d in wake_up_klogd () at kernel/printk/printk.c:2633 #6 0xffffffff8110ca60 in vprintk_emit (facility=0, level=<optimized out>, dict=0x0 <irq_stack_union>, dictlen=<optimized out>, fmt=<optimized out>, args=<optimized out>) at kernel/printk/printk.c:1778 #7 0xffffffff816010c8 in printk (fmt=<optimized out>) at kernel/printk/printk.c:1868 #8 0xffffffffc00013ea in ?? () #9 0x0000000000000000 in ?? () Mailing-list-thread: https://lkml.org/lkml/2015/8/4/755 Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Cc: <stable@vger.kernel.org> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
26 lines
760 B
Makefile
26 lines
760 B
Makefile
ifdef CONFIG_FUNCTION_TRACER
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# Do not profile debug and lowlevel utilities
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CFLAGS_REMOVE_spinlock.o = -pg
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CFLAGS_REMOVE_time.o = -pg
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CFLAGS_REMOVE_irq.o = -pg
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endif
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# Make sure early boot has no stackprotector
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nostackp := $(call cc-option, -fno-stack-protector)
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CFLAGS_enlighten.o := $(nostackp)
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CFLAGS_mmu.o := $(nostackp)
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obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
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time.o xen-asm.o xen-asm_$(BITS).o \
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grant-table.o suspend.o platform-pci-unplug.o \
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p2m.o apic.o
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obj-$(CONFIG_EVENT_TRACING) += trace.o
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obj-$(CONFIG_SMP) += smp.o
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obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
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obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
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obj-$(CONFIG_XEN_DOM0) += vga.o
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obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o
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obj-$(CONFIG_XEN_EFI) += efi.o
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