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Mark Rutland 0d651e4e65 clocksource: arch_timer: use virtual counters ... Switching between reading the virtual or physical counters is problematic, as some core code wants a view of time before we're fully set up. Using a function pointer and switching the source after the first read can make time appear to go backwards, and having a check in the read function is an unfortunate block on what we want to be a fast path. Instead, this patch makes us always use the virtual counters. If we're a guest, or don't have hyp mode, we'll use the virtual timers, and as such don't care about CNTVOFF as long as it doesn't change in such a way as to make time appear to travel backwards. As the guest will use the virtual timers, a (potential) KVM host must use the physical timers (which can wake up the host even if they fire while a guest is executing), and hence a host must have CNTVOFF set to zero so as to have a consistent view of time between the physical timers and virtual counters. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Rob Herring <rob.herring@calxeda.com>		12 years ago
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acpi	ACPI / PM: Allow device power states to be used for CONFIG_PM unset	12 years ago
asm-generic	Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	12 years ago
clocksource	clocksource: arch_timer: use virtual counters	12 years ago
crypto	crypto: sha512 - Expose generic sha512 routine to be callable from other modules	12 years ago
drm	Merge branch 'drm-radeon-sun-hainan' of git://people.freedesktop.org/~airlied/linux	12 years ago
dt-bindings	…
keys	…
linux	Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma	12 years ago
math-emu	…
media	Merge branch 'topic/omap3isp' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	12 years ago
memory	…
misc	…
net	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem	12 years ago
pcmcia	…
ras	…
rdma	…
rxrpc	…
scsi	Merge branch 'postmerge' into for-linus	12 years ago
sound	sound fixes for v3.10-rc1	12 years ago
target	target: removed unused transport_state flag	12 years ago
trace	Fixed regressions (two stability regressions and a performance	12 years ago
uapi	virtio_console: fix uapi header	12 years ago
video	Merge branch 'late/clksrc' into late/cleanup	12 years ago
xen	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	12 years ago
Kbuild	UAPI: remove empty Kbuild files	12 years ago