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xen: branch for v6.12-rc3

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Merge tag 'for-linus-6.12a-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fix from Juergen Gross:
 "A fix for topology information of Xen PV guests"

* tag 'for-linus-6.12a-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  x86/xen: mark boot CPU of PV guest in MSR_IA32_APICBASE
This commit is contained in:
Linus Torvalds 2024-10-11 14:34:18 -07:00
commit d947d6848a
1 changed files with 4 additions and 0 deletions
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4
arch/x86/xen/enlighten_pv.c
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@ -1032,6 +1032,10 @@ static u64 xen_do_read_msr(unsigned int msr, int *err)
switch (msr) {
case MSR_IA32_APICBASE:
val &= ~X2APIC_ENABLE;
if (smp_processor_id() == 0)
val |= MSR_IA32_APICBASE_BSP;
else
val &= ~MSR_IA32_APICBASE_BSP;
break;
}
return val;