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 <joao.m.martins@oracle.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

...

This commit is contained in:

Joao Martins 2017-11-08 17:19:55 +00:00 • committed by Boris Ostrovsky

parent 001f60e1f6

commit 9f08890ab9

5 changed files with 27 additions and 17 deletions

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2

arch/x86/entry/vdso/vma.c

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19

arch/x86/include/asm/pvclock.h

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7

arch/x86/kernel/kvmclock.c

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14

arch/x86/kernel/pvclock.c

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2

drivers/ptp/ptp_kvm.c

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