[PATCH 0/3] KVM: x86: Dynamically allocate hashed page list

From: Sean Christopherson
Date: Fri Mar 14 2025 - 22:40:21 EST


Allocate the hashed list of shadow pages dynamically (separate from
struct kvm), and on-demand. The hashed list is 32KiB, i.e. absolutely
belongs in a separate allocation, and is worth skipping if KVM isn't
shadowing guest PTEs for the VM.

Sean Christopherson (3):
KVM: x86/mmu: Dynamically allocate shadow MMU's hashed page list
KVM: x86: Allocate kvm_vmx/kvm_svm structures using kzalloc()
KVM: x86/mmu: Defer allocation of shadow MMU's hashed page list

arch/x86/include/asm/kvm_host.h | 6 ++---
arch/x86/kvm/mmu/mmu.c | 48 +++++++++++++++++++++++++++++----
arch/x86/kvm/svm/svm.c | 1 +
arch/x86/kvm/vmx/vmx.c | 1 +
arch/x86/kvm/x86.c | 5 +++-
5 files changed, 52 insertions(+), 9 deletions(-)


base-commit: 7d2154117a02832ab3643fe2da4cdc9d2090dcb2
--
2.49.0.rc1.451.g8f38331e32-goog