On 06/08/15 16:58, Jason A. Donenfeld wrote:
> On Thu, Aug 6, 2015 at 12:02 PM, David Vrabel <david.vra...@citrix.com> wrote:
>> Linux PV guests must use the "Xen PV" APIC driver. You need to
>> investigate why your PV guest is not using this (although I'm surprised
>> it works at all with the wrong one).
>
> Actually it appears this PV Guest is using the "flat" APIC driver
> instead of the Xen APIC driver.
>
> But upon further investigation into why:
>
> arch/x86/xen/Makefile:
> obj-$(CONFIG_XEN_DOM0) += apic.o vga.o
>
> It would appear that only dom0 gets to use the Xen APIC driver.
>
> What gives?
Looks like the Makefile is wrong.
Try this:
8<------------------
x86/xen: build "Xen PV" APIC driver for domU as well
A PV domU also needs the Xen PV APIC driver but it was only built for
CONFIG_XEN_DOM0=y.
Signed-off-by: David Vrabel <david.vra...@citrix.com>
Cc: <sta...@vger.kernel.org>
---
arch/x86/xen/Makefile | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 7322755..4b6e29a 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -13,13 +13,13 @@ CFLAGS_mmu.o := $(nostackp)
obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
time.o xen-asm.o xen-asm_$(BITS).o \
grant-table.o suspend.o platform-pci-unplug.o \
- p2m.o
+ p2m.o apic.o
obj-$(CONFIG_EVENT_TRACING) += trace.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
-obj-$(CONFIG_XEN_DOM0) += apic.o vga.o
+obj-$(CONFIG_XEN_DOM0) += vga.o
obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o
obj-$(CONFIG_XEN_EFI) += efi.o
--
2.1.4
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