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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2016-06-30 17:56:38 +0200 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2016-07-25 13:32:34 +0100 |
| commit | ad5475f9faf5186b7f59de2c6481ee3e211f1ed7 (patch) | |
| tree | dc9c373319bc1f1927ce10d8937292c17af217ed /arch/arm | |
| parent | 88e957d6e47f1232ad15b21e54a44f1147ea8c1b (diff) | |
| download | linux-ad5475f9faf5186b7f59de2c6481ee3e211f1ed7.tar.gz linux-ad5475f9faf5186b7f59de2c6481ee3e211f1ed7.tar.xz | |
x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op
HYPERVISOR_vcpu_op() passes Linux's idea of vCPU id as a parameter
while Xen's idea is expected. In some cases these ideas diverge so we
need to do remapping.
Convert all callers of HYPERVISOR_vcpu_op() to use xen_vcpu_nr().
Leave xen_fill_possible_map() and xen_filter_cpu_maps() intact as
they're only being called by PV guests before perpu areas are
initialized. While the issue could be solved by switching to
early_percpu for xen_vcpu_id I think it's not worth it: PV guests will
probably never get to the point where their idea of vCPU id diverges
from Xen's.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/xen/enlighten.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 72cf06bf43f2..0bea3d271f6e 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -177,7 +177,8 @@ static void xen_percpu_init(void) info.mfn = virt_to_gfn(vcpup); info.offset = xen_offset_in_page(vcpup); - err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info); + err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, xen_vcpu_nr(cpu), + &info); BUG_ON(err); per_cpu(xen_vcpu, cpu) = vcpup; |