mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-05 20:33:49 -04:00
Code Issues Packages Projects Releases Wiki Activity

KVM: x86/mmu: Add a helper to walk and zap rmaps for a memslot

Browse Source 
Add a dedicated helper to walk and zap rmaps for a given memslot so that
the code can be shared between KVM-initiated zaps and mmu_notifier
invalidations.

No functional change intended.

Link: https://lore.kernel.org/r/20240809194335.1726916-13-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2024-08-09 12:43:24 -07:00
parent 5b1fb116e1
commit dd9eaad744
1 changed files with 12 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
arch/x86/kvm/mmu/mmu.c
View File

@@ -1573,6 +1573,16 @@ static __always_inline bool walk_slot_rmaps_4k(struct kvm *kvm,
return walk_slot_rmaps(kvm, slot, fn, PG_LEVEL_4K, PG_LEVEL_4K, flush_on_yield);
}
static bool __kvm_rmap_zap_gfn_range(struct kvm *kvm,
const struct kvm_memory_slot *slot,
gfn_t start, gfn_t end, bool can_yield,
bool flush)
{
return __walk_slot_rmaps(kvm, slot, __kvm_zap_rmap,
PG_LEVEL_4K, KVM_MAX_HUGEPAGE_LEVEL,
start, end - 1, can_yield, true, flush);
}
typedef bool (*rmap_handler_t)(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
struct kvm_memory_slot *slot, gfn_t gfn,
int level);
@@ -6602,9 +6612,8 @@ static bool kvm_rmap_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_e
if (WARN_ON_ONCE(start >= end))
continue;
flush = __walk_slot_rmaps(kvm, memslot, __kvm_zap_rmap,
PG_LEVEL_4K, KVM_MAX_HUGEPAGE_LEVEL,
start, end - 1, true, true, flush);
flush = __kvm_rmap_zap_gfn_range(kvm, memslot, start,
end, true, flush);
}
}