diff options
author | Sean Christopherson <seanjc@google.com> | 2023-04-05 03:31:33 +0300 |
---|---|---|
committer | Sean Christopherson <seanjc@google.com> | 2023-04-11 01:17:29 +0300 |
commit | 9ed3bf411226f446a9795f2b49a15b9df98d7cf5 (patch) | |
tree | dfbe8e6c2ec072d9d97120f4c79d18074b37e110 /arch/x86/kvm/kvm_onhyperv.c | |
parent | 8a1300ff95185b23baff9c226a001c269108f9ea (diff) | |
download | linux-9ed3bf411226f446a9795f2b49a15b9df98d7cf5.tar.xz |
KVM: x86/mmu: Move filling of Hyper-V's TLB range struct into Hyper-V code
Refactor Hyper-V's range-based TLB flushing API to take a gfn+nr_pages
pair instead of a struct, and bury said struct in Hyper-V specific code.
Passing along two params generates much better code for the common case
where KVM is _not_ running on Hyper-V, as forwarding the flush on to
Hyper-V's hv_flush_remote_tlbs_range() from kvm_flush_remote_tlbs_range()
becomes a tail call.
Cc: David Matlack <dmatlack@google.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20230405003133.419177-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/kvm_onhyperv.c')
-rw-r--r-- | arch/x86/kvm/kvm_onhyperv.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/arch/x86/kvm/kvm_onhyperv.c b/arch/x86/kvm/kvm_onhyperv.c index 2e2d08da8a3f..ded0bd688c65 100644 --- a/arch/x86/kvm/kvm_onhyperv.c +++ b/arch/x86/kvm/kvm_onhyperv.c @@ -10,17 +10,22 @@ #include "hyperv.h" #include "kvm_onhyperv.h" +struct kvm_hv_tlb_range { + u64 start_gfn; + u64 pages; +}; + static int kvm_fill_hv_flush_list_func(struct hv_guest_mapping_flush_list *flush, void *data) { - struct kvm_tlb_range *range = data; + struct kvm_hv_tlb_range *range = data; return hyperv_fill_flush_guest_mapping_list(flush, range->start_gfn, range->pages); } static inline int hv_remote_flush_root_tdp(hpa_t root_tdp, - struct kvm_tlb_range *range) + struct kvm_hv_tlb_range *range) { if (range) return hyperv_flush_guest_mapping_range(root_tdp, @@ -29,7 +34,8 @@ static inline int hv_remote_flush_root_tdp(hpa_t root_tdp, return hyperv_flush_guest_mapping(root_tdp); } -int hv_flush_remote_tlbs_range(struct kvm *kvm, struct kvm_tlb_range *range) +static int __hv_flush_remote_tlbs_range(struct kvm *kvm, + struct kvm_hv_tlb_range *range) { struct kvm_arch *kvm_arch = &kvm->arch; struct kvm_vcpu *vcpu; @@ -85,11 +91,21 @@ int hv_flush_remote_tlbs_range(struct kvm *kvm, struct kvm_tlb_range *range) spin_unlock(&kvm_arch->hv_root_tdp_lock); return ret; } + +int hv_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, gfn_t nr_pages) +{ + struct kvm_hv_tlb_range range = { + .start_gfn = start_gfn, + .pages = nr_pages, + }; + + return __hv_flush_remote_tlbs_range(kvm, &range); +} EXPORT_SYMBOL_GPL(hv_flush_remote_tlbs_range); int hv_flush_remote_tlbs(struct kvm *kvm) { - return hv_flush_remote_tlbs_range(kvm, NULL); + return __hv_flush_remote_tlbs_range(kvm, NULL); } EXPORT_SYMBOL_GPL(hv_flush_remote_tlbs); |