[...]
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index f56bb699506e..57c1085fd6ab 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -404,8 +404,15 @@ struct kvm_vcpu_arch {
u32 io_gpr; /* GPR used as IO source/target */
- /* Used to calibrate the virutal count register for the guest */
- int32_t host_cp0_count;
+ struct hrtimer comparecount_timer;
+ /* Count bias from the raw time */
+ uint32_t count_bias;
+ /* Frequency of timer in Hz */
+ uint32_t count_hz;
We are currently running with timer frequencies of over 2GHz, so the
width of this variable is close to the limit.
Your follow-on patch exports this to user-space as part of the KVM ABI.
I would suggest, at least for the user-space ABI, to make this a 64-bit
wide value.
+ /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */
+ s64 count_dyn_bias;
+ /* Period of timer tick in ns */
+ u64 count_period;
/* Bitmask of exceptions that are pending */
[...]
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