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| author | James Hogan <james.hogan@imgtec.com> | 2014-05-29 11:16:36 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-05-30 13:02:23 +0200 |
| commit | eda3d33c685ff62524500681249e4c8e2e8dbb8c (patch) | |
| tree | 179621cdccda7d859e99c37e469cb939dc22e453 /arch/mips/mti-malta | |
| parent | MIPS: KVM: Rewrite count/compare timer emulation (diff) | |
| download | linux-eda3d33c685ff62524500681249e4c8e2e8dbb8c.tar.xz linux-eda3d33c685ff62524500681249e4c8e2e8dbb8c.zip | |
MIPS: KVM: Override guest kernel timer frequency directly
The KVM_HOST_FREQ Kconfig symbol was used by KVM guest kernels to
override the timer frequency calculation to a value based on the host
frequency. Now that the KVM timer emulation is implemented independent
of the host timer frequency and defaults to 100MHz, adjust the working
of CONFIG_KVM_HOST_FREQ to match.
The Kconfig symbol now specifies the guest timer frequency directly, and
has been renamed accordingly to KVM_GUEST_TIMER_FREQ. It now defaults to
100MHz too and the help text is updated to make it clear that a zero
value will allow the normal timer frequency calculation to take place
(based on the emulated RTC).
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: Sanjay Lal <sanjayl@kymasys.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/mips/mti-malta')
| -rw-r--r-- | arch/mips/mti-malta/malta-time.c | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/arch/mips/mti-malta/malta-time.c b/arch/mips/mti-malta/malta-time.c index 319009912142..3778a359f3ad 100644 --- a/arch/mips/mti-malta/malta-time.c +++ b/arch/mips/mti-malta/malta-time.c @@ -74,18 +74,8 @@ static void __init estimate_frequencies(void) unsigned int giccount = 0, gicstart = 0; #endif -#if defined (CONFIG_KVM_GUEST) && defined (CONFIG_KVM_HOST_FREQ) - unsigned int prid = read_c0_prid() & (PRID_COMP_MASK | PRID_IMP_MASK); - - /* - * XXXKYMA: hardwire the CPU frequency to Host Freq/4 - */ - count = (CONFIG_KVM_HOST_FREQ * 1000000) >> 3; - if ((prid != (PRID_COMP_MIPS | PRID_IMP_20KC)) && - (prid != (PRID_COMP_MIPS | PRID_IMP_25KF))) - count *= 2; - - mips_hpt_frequency = count; +#if defined(CONFIG_KVM_GUEST) && CONFIG_KVM_GUEST_TIMER_FREQ + mips_hpt_frequency = CONFIG_KVM_GUEST_TIMER_FREQ * 1000000; return; #endif |