diff mbox series

[v8,14/14] KVM: TDX: Allow 2MB large page for TD GUEST

Message ID 2f5ea6d9ae5ce86c7eebd52de4a061ffb05eb420.1708933625.git.isaku.yamahata@intel.com (mailing list archive)
State New, archived
Headers show
Series KVM TDX: TDP MMU: large page support | expand

Commit Message

Isaku Yamahata Feb. 26, 2024, 8:29 a.m. UTC 
From: Xiaoyao Li <xiaoyao.li@intel.com>

Now that everything is there to support 2MB page for TD guest.  Because TDX
module TDH.MEM.PAGE.AUG supports 4KB page and 2MB page, set struct
kvm_arch.tdp_max_page_level to 2MB page level.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
---
 arch/x86/kvm/mmu/tdp_mmu.c | 9 ++-------
 arch/x86/kvm/vmx/tdx.c     | 7 +++++--
 2 files changed, 7 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index d6ce8496803f..8663e163427c 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -1544,14 +1544,9 @@  int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
 
 		sp->nx_huge_page_disallowed = fault->huge_page_disallowed;
 
-		if (is_shadow_present_pte(iter.old_spte)) {
-			/*
-			 * TODO: large page support.
-			 * Doesn't support large page for TDX now
-			 */
-			KVM_BUG_ON(is_private_sptep(iter.sptep), vcpu->kvm);
+		if (is_shadow_present_pte(iter.old_spte))
 			r = tdp_mmu_split_huge_page(kvm, &iter, sp, true);
-		} else
+		else
 			r = tdp_mmu_link_sp(kvm, &iter, sp, true);
 
 		/*
diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index 5b4d94a6c6e2..1a94b1072068 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -3109,8 +3109,11 @@  int tdx_gmem_max_level(struct kvm *kvm, kvm_pfn_t pfn, gfn_t gfn,
 	if (!is_private)
 		return 0;
 
-	/* TODO: Enable 2mb and 1gb large page support. */
-	*max_level = min(*max_level, PG_LEVEL_4K);
+	/*
+	 * TDH.MEM.PAGE.AUG supports up to 2MB page.
+	 * TODO: Enable 1gb large page support.
+	 */
+	*max_level = min(*max_level, PG_LEVEL_2M);
 	return 0;
 }