diff options
Diffstat (limited to 'arch/arm/kvm/coproc.c')
| -rw-r--r-- | arch/arm/kvm/coproc.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/arm/kvm/coproc.c b/arch/arm/kvm/coproc.c index a629f2c1d0f9..78c0885d6501 100644 --- a/arch/arm/kvm/coproc.c +++ b/arch/arm/kvm/coproc.c @@ -74,11 +74,13 @@ int kvm_handle_cp14_access(struct kvm_vcpu *vcpu, struct kvm_run *run) static void reset_mpidr(struct kvm_vcpu *vcpu, const struct coproc_reg *r) { /* - * Compute guest MPIDR. No need to mess around with different clusters - * but we read the 'U' bit from the underlying hardware directly. + * Compute guest MPIDR. We build a virtual cluster out of the + * vcpu_id, but we read the 'U' bit from the underlying + * hardware directly. */ - vcpu->arch.cp15[c0_MPIDR] = (read_cpuid_mpidr() & MPIDR_SMP_BITMASK) - | vcpu->vcpu_id; + vcpu->arch.cp15[c0_MPIDR] = ((read_cpuid_mpidr() & MPIDR_SMP_BITMASK) | + ((vcpu->vcpu_id >> 2) << MPIDR_LEVEL_BITS) | + (vcpu->vcpu_id & 3)); } /* TRM entries A7:4.3.31 A15:4.3.28 - RO WI */ @@ -122,6 +124,10 @@ static void reset_l2ctlr(struct kvm_vcpu *vcpu, const struct coproc_reg *r) asm volatile("mrc p15, 1, %0, c9, c0, 2\n" : "=r" (l2ctlr)); l2ctlr &= ~(3 << 24); ncores = atomic_read(&vcpu->kvm->online_vcpus) - 1; + /* How many cores in the current cluster and the next ones */ + ncores -= (vcpu->vcpu_id & ~3); + /* Cap it to the maximum number of cores in a single cluster */ + ncores = min(ncores, 3U); l2ctlr |= (ncores & 3) << 24; vcpu->arch.cp15[c9_L2CTLR] = l2ctlr; |
