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Message-Id: <b263e32affd62ddd675ae50981a4ae3ef7b3c607.1690323516.git.isaku.yamahata@intel.com>
Date: Tue, 25 Jul 2023 15:23:47 -0700
From: isaku.yamahata@...el.com
To: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: isaku.yamahata@...el.com, isaku.yamahata@...il.com,
Paolo Bonzini <pbonzini@...hat.com>, erdemaktas@...gle.com,
Sean Christopherson <seanjc@...gle.com>,
Sagi Shahar <sagis@...gle.com>,
David Matlack <dmatlack@...gle.com>,
Kai Huang <kai.huang@...el.com>,
Zhi Wang <zhi.wang.linux@...il.com>, chen.bo@...el.com,
hang.yuan@...el.com, tina.zhang@...el.com,
Xiaoyao Li <xiaoyao.li@...el.com>
Subject: [RFC PATCH v4 01/16] KVM: TDP_MMU: Go to next level if smaller private mapping exists
From: Xiaoyao Li <xiaoyao.li@...el.com>
Cannot map a private page as large page if any smaller mapping exists.
It has to wait for all the not-mapped smaller page to be mapped and
promote it to larger mapping.
Signed-off-by: Xiaoyao Li <xiaoyao.li@...el.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
---
arch/x86/kvm/mmu/tdp_mmu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 95ba78944712..a9f0f4ade2d0 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -1293,7 +1293,8 @@ int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
tdp_mmu_for_each_pte(iter, mmu, is_private, raw_gfn, raw_gfn + 1) {
int r;
- if (fault->nx_huge_page_workaround_enabled)
+ if (fault->nx_huge_page_workaround_enabled ||
+ kvm_gfn_shared_mask(vcpu->kvm))
disallowed_hugepage_adjust(fault, iter.old_spte, iter.level);
/*
--
2.25.1
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