On Wed, Jul 01, 2020 at 03:53:06PM -0600, Rob Herring wrote: > If guests don't have certain CPU erratum work-arounds implemented, then > there is a possibility a guest can deadlock the system. IOW, only trusted > guests should be used on systems with the erratum. > > This is the case for Cortex-A57 erratum 832075. > > Cc: Marc Zyngier <m...@kernel.org> > Cc: James Morse <james.mo...@arm.com> > Cc: Julien Thierry <julien.thierry.k...@gmail.com> > Cc: Suzuki K Poulose <suzuki.poul...@arm.com> > Cc: Catalin Marinas <catalin.mari...@arm.com> > Cc: Will Deacon <w...@kernel.org> > Cc: kvmarm@lists.cs.columbia.edu > Signed-off-by: Rob Herring <r...@kernel.org> > --- > arch/arm64/kvm/arm.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c > index 90cb90561446..e2f50fa4d825 100644 > --- a/arch/arm64/kvm/arm.c > +++ b/arch/arm64/kvm/arm.c > @@ -1653,6 +1653,10 @@ int kvm_arch_init(void *opaque) > return -ENODEV; > } > > + if (cpus_have_const_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE)) > + kvm_info("Guests without required CPU erratum work-arounds can > deadlock system!\n" \
work-arounds => workarounds (mainly for consistency, I have no clue if this is a real word or not!). I'd also probably do erratum => errata given that you're about to add a second one. Will _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm