On 01/04/21 00:29, Sean Christopherson wrote:
+ if (is_tdp_mmu_enabled(kvm)) {
+ read_lock(>mmu_lock);
+ kvm_tdp_mmu_zap_all_fast(kvm);
Purely because it exists first, I think we should follow the legacy MMU's
terminology, i.e. kvm_tdp_mmu_zap_obsolete_pages().
On 31/03/21 23:08, Ben Gardon wrote:
+/*
+ * Since kvm_tdp_mmu_invalidate_roots has acquired a reference to each
+ * invalidated root, they will not be freed until this function drops the
+ * reference. Before dropping that reference, tear down the paging
+ * structure so that whichever thread
On Wed, Mar 31, 2021, Ben Gardon wrote:
> ---
> arch/x86/kvm/mmu/mmu.c | 6
> arch/x86/kvm/mmu/tdp_mmu.c | 74 +-
> arch/x86/kvm/mmu/tdp_mmu.h | 1 +
> 3 files changed, 80 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/mmu/mmu.c
To avoid saddling a vCPU thread with the work of tearing down an entire
paging structure, take a reference on each root before they become
obsolete, so that the thread initiating the fast invalidation can tear
down the paging structure and (most likely) release the last reference.
As a bonus, this
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