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Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. Implement the required support by adding hvclock_page VVAR. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: devel@linuxdriverproject.org Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: virtualization@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20170303132142.25595-4-vkuznets@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
16 lines
449 B
C
16 lines
449 B
C
/* x86-specific clocksource additions */
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#ifndef _ASM_X86_CLOCKSOURCE_H
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#define _ASM_X86_CLOCKSOURCE_H
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#define VCLOCK_NONE 0 /* No vDSO clock available. */
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#define VCLOCK_TSC 1 /* vDSO should use vread_tsc. */
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#define VCLOCK_PVCLOCK 2 /* vDSO should use vread_pvclock. */
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#define VCLOCK_HVCLOCK 3 /* vDSO should use vread_hvclock. */
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#define VCLOCK_MAX 3
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struct arch_clocksource_data {
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int vclock_mode;
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};
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#endif /* _ASM_X86_CLOCKSOURCE_H */
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