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xen: fixes for 4.15-rc4

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Merge tag 'for-linus-4.15-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:
 "Two minor fixes for running as Xen dom0:

   - when built as 32 bit kernel on large machines the Xen LAPIC
     emulation should report a rather modern LAPIC in order to support
     enough APIC-Ids

   - The Xen LAPIC emulation is needed for dom0 only, so build it only
     for kernels supporting to run as Xen dom0"

* tag 'for-linus-4.15-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: XEN_ACPI_PROCESSOR is Dom0-only
  x86/Xen: don't report ancient LAPIC version
This commit is contained in:
Linus Torvalds 2017-12-15 11:32:09 -08:00
commit bde6b37e49
2 changed files with 2 additions and 2 deletions
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2
arch/x86/xen/apic.c
View File

@ -57,7 +57,7 @@ static u32 xen_apic_read(u32 reg)
return 0;
if (reg == APIC_LVR)
return 0x10;
return 0x14;
#ifdef CONFIG_X86_32
if (reg == APIC_LDR)
return SET_APIC_LOGICAL_ID(1UL << smp_processor_id());

2
drivers/xen/Kconfig
View File

@ -269,7 +269,7 @@ config XEN_ACPI_HOTPLUG_CPU
config XEN_ACPI_PROCESSOR
tristate "Xen ACPI processor"
depends on XEN && X86 && ACPI_PROCESSOR && CPU_FREQ
depends on XEN && XEN_DOM0 && X86 && ACPI_PROCESSOR && CPU_FREQ
default m
help
This ACPI processor uploads Power Management information to the Xen