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x86/pvclock: add setter for pvclock_pvti_cpu0_va

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Right now there is only a pvclock_pvti_cpu0_va() which is defined
on kvmclock since:

commit dac16fba6f
("x86/vdso: Get pvclock data from the vvar VMA instead of the fixmap")

The only user of this interface so far is kvm. This commit adds a
setter function for the pvti page and moves pvclock_pvti_cpu0_va
to pvclock, which is a more generic place to have it; and would
allow other PV clocksources to use it, such as Xen.

While moving pvclock_pvti_cpu0_va into pvclock, rename also this
function to pvclock_get_pvti_cpu0_va (including its call sites)
to be symmetric with the setter (pvclock_set_pvti_cpu0_va).

Signed-off-by: Joao Martins <[email protected]>
Acked-by: Andy Lutomirski <[email protected]>
Acked-by: Paolo Bonzini <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Signed-off-by: Boris Ostrovsky <[email protected]>
This commit is contained in:
Joao Martins 2017-11-08 17:19:55 +00:00 • committed by Boris Ostrovsky
commit 9f08890ab9
5 changed files with 27 additions and 17 deletions
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2
drivers/ptp/ptp_kvm.c
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@ -182,7 +182,7 @@ static int __init ptp_kvm_init(void)
return -ENODEV;
clock_pair_gpa = slow_virt_to_phys(&clock_pair);
hv_clock = pvclock_pvti_cpu0_va();
hv_clock = pvclock_get_pvti_cpu0_va();
if (!hv_clock)
return -ENODEV;