Re: [PATCH v4 24/46] KVM: PPC: Book3S HV P9: Use large decrementer for HDEC

On 23/03/2021 12:02, Nicholas Piggin wrote:

quoted

On processors that don't suppress the HDEC exceptions when LPCR[HDICE]=0,
this could help reduce needless guest exits due to leftover exceptions on
entering the guest.

Reviewed-by: Alexey Kardashevskiy <redacted>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

ERROR: modpost: "decrementer_max" [arch/powerpc/kvm/kvm-hv.ko] undefined!


need this:

--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c

@@ -89,6 +89,7 @@ static struct clocksource clocksource_timebase = {

  #define DECREMENTER_DEFAULT_MAX 0x7FFFFFFF
  u64 decrementer_max = DECREMENTER_DEFAULT_MAX;
+EXPORT_SYMBOL_GPL(decrementer_max);