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authorYury Norov <yury.norov@gmail.com>2022-05-10 04:54:23 +0300
committerYury Norov <yury.norov@gmail.com>2022-06-03 16:52:58 +0300
commitd603fd8dd35f6028bb09cd2e9ec6557c4bc0dd95 (patch)
tree5d7edcbea05827bd1852cedc90a8d6efbaf4dd60
parenta7ef9b455c7ca8f07a5b4bd967a3c39c7434d43f (diff)
downloadlinux-d603fd8dd35f6028bb09cd2e9ec6557c4bc0dd95.tar.xz
KVM: x86: hyper-v: replace bitmap_weight() with hweight64()
kvm_hv_flush_tlb() applies bitmap API to a u64 variable valid_bank_mask. Since valid_bank_mask has a fixed size, we can use hweight64() and avoid excessive bloating. CC: Borislav Petkov <bp@alien8.de> CC: Dave Hansen <dave.hansen@linux.intel.com> CC: H. Peter Anvin <hpa@zytor.com> CC: Ingo Molnar <mingo@redhat.com> CC: Jim Mattson <jmattson@google.com> CC: Joerg Roedel <joro@8bytes.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Sean Christopherson <seanjc@google.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Wanpeng Li <wanpengli@tencent.com> CC: kvm@vger.kernel.org CC: linux-kernel@vger.kernel.org CC: x86@kernel.org Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Yury Norov <yury.norov@gmail.com>
-rw-r--r--arch/x86/kvm/hyperv.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 18325e0ae7bc..c8ca95d4e4e9 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1879,7 +1879,7 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
all_cpus = flush_ex.hv_vp_set.format !=
HV_GENERIC_SET_SPARSE_4K;
- if (hc->var_cnt != bitmap_weight((unsigned long *)&valid_bank_mask, 64))
+ if (hc->var_cnt != hweight64(valid_bank_mask))
return HV_STATUS_INVALID_HYPERCALL_INPUT;
if (all_cpus)
@@ -1980,7 +1980,7 @@ static u64 kvm_hv_send_ipi(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
valid_bank_mask = send_ipi_ex.vp_set.valid_bank_mask;
all_cpus = send_ipi_ex.vp_set.format == HV_GENERIC_SET_ALL;
- if (hc->var_cnt != bitmap_weight((unsigned long *)&valid_bank_mask, 64))
+ if (hc->var_cnt != hweight64(valid_bank_mask))
return HV_STATUS_INVALID_HYPERCALL_INPUT;
if (all_cpus)