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Subject[PATCH 0/4] MIPS: Guest timekeeping improvements
Date
These patches improve timekeeping of MIPS/Malta kernels running in a KVM
guest.

Patch 2 fixes malta frequency calculation under virtualisation,
especially on very slow targets (FPGA / emulators). Patch 1 is a minor
fix for something I noticed while writing patch 2.

Patch 3 drops the use of the PIT timer for Malta, which is slow to
emulate with KVM + QEMU.

Finally patch 4 calculates min_delta_ns of cevt-r4k dynamically to
handle virtualised environments with software emulated Count/Compare,
and where Count frequency may not be directly related to actual CPU
speed (and so the static value of 0x300 may be no good).

James Hogan (4):
MIPS: malta-time: Start GIC count before syncing to RTC
MIPS: malta-time: Take seconds into account
MIPS: malta-time: Don't use PIT timer for cevt/csrc
MIPS: cevt-r4k: Dynamically calculate min_delta_ns

arch/mips/Kconfig | 1 -
arch/mips/kernel/cevt-r4k.c | 82 +++++++++++++++++++++++++++++++++++++++-
arch/mips/mti-malta/malta-time.c | 50 +++++++++++++++---------
3 files changed, 113 insertions(+), 20 deletions(-)

Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
--
2.4.10

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