On 2025/7/3 21:57, Ben Horgan wrote:

Previously, u64_replace_bits() was used to no effect as the return value was ignored. Convert to u64p_replace_bits() so the value is updated in place.

Signed-off-by: Ben Horgan ben.horgan@arm.com Fixes: efff9dd2fee7 ("KVM: arm64: Handle out-of-bound write to MDCR_EL2.HPMN") Cc: Marc Zyngier maz@kernel.org Cc: stable@vger.kernel.org

---

arch/arm64/kvm/sys_regs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 76c2f0da821f..c20bd6f21e60 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2624,7 +2624,7 @@ static bool access_mdcr(struct kvm_vcpu *vcpu, */ if (hpmn > vcpu->kvm->arch.nr_pmu_counters) { hpmn = vcpu->kvm->arch.nr_pmu_counters;

• u64_replace_bits(val, hpmn, MDCR_EL2_HPMN);
  

• u64p_replace_bits(&val, hpmn, MDCR_EL2_HPMN);
  

  }

__vcpu_assign_sys_reg(vcpu, MDCR_EL2, val);

Reviewed-by: Zenghui Yu yuzenghui@huawei.com

Thanks!