From: lantianyu1986@gmail.com
To: unlisted-recipients:; (no To-header on input)
Cc: Lan Tianyu <Tianyu.Lan@microsoft.com>,
christoffer.dall@arm.com, marc.zyngier@arm.com,
linux@armlinux.org.uk, catalin.marinas@arm.com,
will.deacon@arm.com, jhogan@kernel.org, ralf@linux-mips.org,
paul.burton@mips.com, paulus@ozlabs.org,
benh@kernel.crashing.org, mpe@ellerman.id.au,
pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org,
linux-mips@vger.kernel.org, kvm-ppc@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
michael.h.kelley@microsoft.com, kys@microsoft.com,
vkuznets@redhat.com
Subject: [PATCH 3/11] KVM: Add spte's point in the struct kvm_mmu_page
Date: Fri, 4 Jan 2019 16:53:57 +0800 [thread overview]
Message-ID: <20190104085405.40356-4-Tianyu.Lan@microsoft.com> (raw)
In-Reply-To: <20190104085405.40356-1-Tianyu.Lan@microsoft.com>
From: Lan Tianyu <Tianyu.Lan@microsoft.com>
It's necessary to check whether mmu page is last or large page when add
mmu page into flush list. "spte" is needed for such check and so add
spte point in the struct kvm_mmu_page.
Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/mmu.c | 5 +++++
arch/x86/kvm/paging_tmpl.h | 2 ++
3 files changed, 8 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 4660ce90de7f..78d2a6714c3b 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -332,6 +332,7 @@ struct kvm_mmu_page {
int root_count; /* Currently serving as active root */
unsigned int unsync_children;
struct kvm_rmap_head parent_ptes; /* rmap pointers to parent sptes */
+ u64 *sptep;
/* The page is obsolete if mmu_valid_gen != kvm->arch.mmu_valid_gen. */
unsigned long mmu_valid_gen;
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index ce770b446238..068694fa2371 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3160,6 +3160,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, int write, int map_writable,
pseudo_gfn = base_addr >> PAGE_SHIFT;
sp = kvm_mmu_get_page(vcpu, pseudo_gfn, iterator.addr,
iterator.level - 1, 1, ACC_ALL);
+ sp->sptep = iterator.sptep;
link_shadow_page(vcpu, iterator.sptep, sp);
}
@@ -3588,6 +3589,7 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
sp = kvm_mmu_get_page(vcpu, 0, 0,
vcpu->arch.mmu->shadow_root_level, 1, ACC_ALL);
++sp->root_count;
+ sp->sptep = NULL;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu->root_hpa = __pa(sp->spt);
} else if (vcpu->arch.mmu->shadow_root_level == PT32E_ROOT_LEVEL) {
@@ -3604,6 +3606,7 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
i << 30, PT32_ROOT_LEVEL, 1, ACC_ALL);
root = __pa(sp->spt);
++sp->root_count;
+ sp->sptep = NULL;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu->pae_root[i] = root | PT_PRESENT_MASK;
}
@@ -3644,6 +3647,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
vcpu->arch.mmu->shadow_root_level, 0, ACC_ALL);
root = __pa(sp->spt);
++sp->root_count;
+ sp->sptep = NULL;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu->root_hpa = root;
return 0;
@@ -3681,6 +3685,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
0, ACC_ALL);
root = __pa(sp->spt);
++sp->root_count;
+ sp->sptep = NULL;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu->pae_root[i] = root | pm_mask;
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 6bdca39829bc..833e8855bbc9 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -633,6 +633,7 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
table_gfn = gw->table_gfn[it.level - 2];
sp = kvm_mmu_get_page(vcpu, table_gfn, addr, it.level-1,
false, access);
+ sp->sptep = it.sptep;
}
/*
@@ -663,6 +664,7 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
sp = kvm_mmu_get_page(vcpu, direct_gfn, addr, it.level-1,
true, direct_access);
+ sp->sptep = it.sptep;
link_shadow_page(vcpu, it.sptep, sp);
}
--
2.14.4
next prev parent reply other threads:[~2019-01-04 8:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-04 8:53 [PATCH 00/11] X86/KVM/Hyper-V: Add HV ept tlb range list flush support in KVM lantianyu1986
2019-01-04 8:53 ` [PATCH 1/11] X86/Hyper-V: Add parameter offset for hyperv_fill_flush_guest_mapping_list() lantianyu1986
2019-01-04 8:53 ` [PATCH 2/11] KVM/VMX: Fill range list in kvm_fill_hv_flush_list_func() lantianyu1986
2019-01-04 8:53 ` lantianyu1986 [this message]
2019-01-07 16:34 ` [PATCH 3/11] KVM: Add spte's point in the struct kvm_mmu_page Paolo Bonzini
2019-01-04 8:53 ` [PATCH 4/11] KVM/MMU: Introduce tlb flush with range list lantianyu1986
2019-01-07 16:39 ` Paolo Bonzini
2019-01-04 8:53 ` [PATCH 5/11] KVM/MMU: Flush tlb directly in the kvm_mmu_slot_gfn_write_protect() lantianyu1986
2019-01-04 8:54 ` [PATCH 6/11] KVM/MMU: Flush tlb with range list in sync_page() lantianyu1986
[not found] ` <20190104163035.GC11288@linux.intel.com>
2019-01-07 5:13 ` Tianyu Lan
2019-01-07 16:07 ` Paolo Bonzini
2019-01-04 8:54 ` [PATCH 7/11] KVM: Remove redundant check in the kvm_get_dirty_log_protect() lantianyu1986
[not found] ` <20190104155036.GA11288@linux.intel.com>
2019-01-04 21:27 ` Sean Christopherson
2019-01-07 16:20 ` Paolo Bonzini
2019-01-04 8:54 ` [PATCH 8/11] KVM: Make kvm_arch_mmu_enable_log_dirty_pt_masked() return value lantianyu1986
2019-01-04 8:54 ` [PATCH 9/11] KVM/MMU: Flush tlb in the kvm_mmu_write_protect_pt_masked() lantianyu1986
2019-01-07 16:26 ` Paolo Bonzini
2019-01-10 9:06 ` Tianyu Lan
2019-01-04 8:54 ` [PATCH 10/11] KVM: Add flush parameter for kvm_age_hva() lantianyu1986
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