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| author | Yury Norov <yury.norov@gmail.com> | 2022-05-09 18:54:23 -0700 |
|---|---|---|
| committer | Yury Norov <yury.norov@gmail.com> | 2022-06-03 06:52:58 -0700 |
| commit | d603fd8dd35f6028bb09cd2e9ec6557c4bc0dd95 (patch) | |
| tree | 5d7edcbea05827bd1852cedc90a8d6efbaf4dd60 /arch/x86/kvm/hyperv.c | |
| parent | a7ef9b455c7ca8f07a5b4bd967a3c39c7434d43f (diff) | |
| download | linux-d603fd8dd35f6028bb09cd2e9ec6557c4bc0dd95.tar.bz2 | |
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>
Diffstat (limited to 'arch/x86/kvm/hyperv.c')
| -rw-r--r-- | arch/x86/kvm/hyperv.c | 4 |
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) |