diff options
| author | Sean Christopherson <seanjc@google.com> | 2026-02-19 00:08:20 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-03-03 23:16:27 +0300 |
| commit | ecb80629321306547f7ad13b0ca5ef9cf8cdbb77 (patch) | |
| tree | 4d0fdf99d290ea82b080f6606b58e447b05a0a74 | |
| parent | 1450ab08108ccd825c8f9362475fadfc187942fc (diff) | |
| download | linux-ecb80629321306547f7ad13b0ca5ef9cf8cdbb77.tar.xz | |
KVM: x86/mmu: Don't zero-allocate page table used for splitting a hugepage
When splitting hugepages in the TDP MMU, don't zero the new page table on
allocation since tdp_mmu_split_huge_page() is guaranteed to write every
entry and thus every byte.
Unless someone peeks at the memory between allocating the page table and
writing the child SPTEs, no functional change intended.
Cc: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: Kai Huang <kai.huang@intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Link: https://patch.msgid.link/20260218210820.2828896-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | arch/x86/kvm/mmu/tdp_mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 9c26038f6b77..7b1102d26f9c 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -1507,7 +1507,7 @@ static struct kvm_mmu_page *tdp_mmu_alloc_sp_for_split(void) if (!sp) return NULL; - sp->spt = (void *)get_zeroed_page(GFP_KERNEL_ACCOUNT); + sp->spt = (void *)__get_free_page(GFP_KERNEL_ACCOUNT); if (!sp->spt) { kmem_cache_free(mmu_page_header_cache, sp); return NULL; |