x86/vdso: Enforce 64bit clocksource
All VDSO clock sources are TSC based and use CLOCKSOURCE_MASK(64). There is no point in masking with all FF. Get rid of it and enforce the mask in the sanity checker. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Andy Lutomirski <luto@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Matt Rickard <matt@softrans.com.au> Cc: Stephen Boyd <sboyd@kernel.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Florian Weimer <fweimer@redhat.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: devel@linuxdriverproject.org Cc: virtualization@lists.linux-foundation.org Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Juergen Gross <jgross@suse.com> Link: https://lkml.kernel.org/r/20180917130707.151963007@linutronix.de
This commit is contained in:
parent
2a21ad571b
commit
a51e996d48
|
@ -201,7 +201,7 @@ notrace static inline u64 vgetsns(int *mode)
|
|||
#endif
|
||||
else
|
||||
return 0;
|
||||
v = (cycles - gtod->cycle_last) & gtod->mask;
|
||||
v = cycles - gtod->cycle_last;
|
||||
return v * gtod->mult;
|
||||
}
|
||||
|
||||
|
|
|
@ -120,4 +120,10 @@ void clocksource_arch_init(struct clocksource *cs)
|
|||
cs->name, cs->archdata.vclock_mode);
|
||||
cs->archdata.vclock_mode = VCLOCK_NONE;
|
||||
}
|
||||
|
||||
if (cs->mask != CLOCKSOURCE_MASK(64)) {
|
||||
pr_warn("clocksource %s registered with invalid mask %016llx. Disabling vclock.\n",
|
||||
cs->name, cs->mask);
|
||||
cs->archdata.vclock_mode = VCLOCK_NONE;
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue