Currently the software emulated timer is initialised to a frequency of
100MHz by kvm_mips_init_count(), but this isn't suitable for VZ where
the frequency of the guest timer matches that of the host.
Add a count_hz argument so the caller can specify the default frequency,
and move the call from kvm_arch_vcpu_create() to the implementation
specific vcpu_setup() callback, so that VZ can specify a different
frequency.
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: "Radim Krčmář" <rkrcmar@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: kvm@xxxxxxxxxxxxxxx
---
arch/mips/include/asm/kvm_host.h | 2 +-
arch/mips/kvm/emulate.c | 13 ++++++-------
arch/mips/kvm/mips.c | 3 ---
arch/mips/kvm/trap_emul.c | 3 +++
4 files changed, 10 insertions(+), 11 deletions(-)
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index f2b0b07fd3d1..d92275e8524c 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -809,7 +809,7 @@ extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
u32 kvm_mips_read_count(struct kvm_vcpu *vcpu);
void kvm_mips_write_count(struct kvm_vcpu *vcpu, u32 count);
void kvm_mips_write_compare(struct kvm_vcpu *vcpu, u32 compare, bool ack);
-void kvm_mips_init_count(struct kvm_vcpu *vcpu);
+void kvm_mips_init_count(struct kvm_vcpu *vcpu, unsigned long count_hz);
int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl);
int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume);
int kvm_mips_set_count_hz(struct kvm_vcpu *vcpu, s64 count_hz);
diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c
index d75ab8940e1f..f09a161926e7 100644
--- a/arch/mips/kvm/emulate.c
+++ b/arch/mips/kvm/emulate.c
@@ -543,16 +543,15 @@ void kvm_mips_write_count(struct kvm_vcpu *vcpu, u32 count)
/**
* kvm_mips_init_count() - Initialise timer.
* @vcpu: Virtual CPU.
+ * @count_hz: Frequency of timer.
*
- * Initialise the timer to a sensible frequency, namely 100MHz, zero it, and set
- * it going if it's enabled.
+ * Initialise the timer to the specified frequency, zero it, and set it going if
+ * it's enabled.
*/
-void kvm_mips_init_count(struct kvm_vcpu *vcpu)
+void kvm_mips_init_count(struct kvm_vcpu *vcpu, unsigned long count_hz)
{
- /* 100 MHz */
- vcpu->arch.count_hz = 100*1000*1000;
- vcpu->arch.count_period = div_u64((u64)NSEC_PER_SEC << 32,
- vcpu->arch.count_hz);
+ vcpu->arch.count_hz = count_hz;
+ vcpu->arch.count_period = div_u64((u64)NSEC_PER_SEC << 32, count_hz);
vcpu->arch.count_dyn_bias = 0;
/* Starting at 0 */
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index cd07ea27f336..272c660a6cd3 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -371,9 +371,6 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
/* Init */
vcpu->arch.last_sched_cpu = -1;
- /* Start off the timer */
- kvm_mips_init_count(vcpu);
-
return vcpu;
out_free_gebase:
diff --git a/arch/mips/kvm/trap_emul.c b/arch/mips/kvm/trap_emul.c
index 3a854bb9e606..0e3d260aafcb 100644
--- a/arch/mips/kvm/trap_emul.c
+++ b/arch/mips/kvm/trap_emul.c
@@ -565,6 +565,9 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu)
u32 config, config1;
int vcpu_id = vcpu->vcpu_id;
+ /* Start off the timer at 100 MHz */
+ kvm_mips_init_count(vcpu, 100*1000*1000);
+
/*
* Arch specific stuff, set up config registers properly so that the
* guest will come up as expected
--
git-series 0.8.10
