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>

1 files changed, 6 insertions, 6 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 5cd695f..5e0014e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1756,14 +1756,14 @@ config KVM_GUEST
 	help
 	  Select this option if building a guest kernel for KVM (Trap & Emulate) mode
 
-config KVM_HOST_FREQ
-	int "KVM Host Processor Frequency (MHz)"
+config KVM_GUEST_TIMER_FREQ
+	int "Count/Compare Timer Frequency (MHz)"
 	depends on KVM_GUEST
-	default 500
+	default 100
 	help
-	  Select this option if building a guest kernel for KVM to skip
-	  RTC emulation when determining guest CPU Frequency.  Instead, the guest
-	  processor frequency is automatically derived from the host frequency.
+	  Set this to non-zero if building a guest kernel for KVM to skip RTC
+	  emulation when determining guest CPU Frequency. Instead, the guest's
+	  timer frequency is specified directly.
 
 choice
 	prompt "Kernel page size"