From: David Matlack <dmatlack@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Marc Zyngier <maz@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
Anup Patel <anup@brainfault.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Sean Christopherson <seanjc@google.com>,
Andrew Jones <drjones@redhat.com>,
Ben Gardon <bgardon@google.com>, Peter Xu <peterx@redhat.com>,
maciej.szmigiero@oracle.com,
"moderated list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)"
<kvmarm@lists.cs.columbia.edu>,
"open list:KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)"
<linux-mips@vger.kernel.org>,
"open list:KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)"
<kvm@vger.kernel.org>,
"open list:KERNEL VIRTUAL MACHINE FOR RISC-V (KVM/riscv)"
<kvm-riscv@lists.infradead.org>,
Peter Feiner <pfeiner@google.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
David Matlack <dmatlack@google.com>
Subject: [PATCH v5 06/21] KVM: x86/mmu: Consolidate shadow page allocation and initialization
Date: Fri, 13 May 2022 20:28:04 +0000 [thread overview]
Message-ID: <20220513202819.829591-7-dmatlack@google.com> (raw)
In-Reply-To: <20220513202819.829591-1-dmatlack@google.com>
Consolidate kvm_mmu_alloc_page() and kvm_mmu_alloc_shadow_page() under
the latter so that all shadow page allocation and initialization happens
in one place.
No functional change intended.
Signed-off-by: David Matlack <dmatlack@google.com>
---
arch/x86/kvm/mmu/mmu.c | 39 +++++++++++++++++----------------------
1 file changed, 17 insertions(+), 22 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index ce334eaeef22..fd749748b280 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1690,27 +1690,6 @@ static void drop_parent_pte(struct kvm_mmu_page *sp,
mmu_spte_clear_no_track(parent_pte);
}
-static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, bool direct)
-{
- struct kvm_mmu_page *sp;
-
- sp = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_page_header_cache);
- sp->spt = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_shadow_page_cache);
- if (!direct)
- sp->gfns = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_gfn_array_cache);
- set_page_private(virt_to_page(sp->spt), (unsigned long)sp);
-
- /*
- * active_mmu_pages must be a FIFO list, as kvm_zap_obsolete_pages()
- * depends on valid pages being added to the head of the list. See
- * comments in kvm_zap_obsolete_pages().
- */
- sp->mmu_valid_gen = vcpu->kvm->arch.mmu_valid_gen;
- list_add(&sp->link, &vcpu->kvm->arch.active_mmu_pages);
- kvm_mod_used_mmu_pages(vcpu->kvm, +1);
- return sp;
-}
-
static void mark_unsync(u64 *spte);
static void kvm_mmu_mark_parents_unsync(struct kvm_mmu_page *sp)
{
@@ -2098,7 +2077,23 @@ static struct kvm_mmu_page *kvm_mmu_alloc_shadow_page(struct kvm_vcpu *vcpu,
struct hlist_head *sp_list,
union kvm_mmu_page_role role)
{
- struct kvm_mmu_page *sp = kvm_mmu_alloc_page(vcpu, role.direct);
+ struct kvm_mmu_page *sp;
+
+ sp = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_page_header_cache);
+ sp->spt = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_shadow_page_cache);
+ if (!role.direct)
+ sp->gfns = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_gfn_array_cache);
+
+ set_page_private(virt_to_page(sp->spt), (unsigned long)sp);
+
+ /*
+ * active_mmu_pages must be a FIFO list, as kvm_zap_obsolete_pages()
+ * depends on valid pages being added to the head of the list. See
+ * comments in kvm_zap_obsolete_pages().
+ */
+ sp->mmu_valid_gen = vcpu->kvm->arch.mmu_valid_gen;
+ list_add(&sp->link, &vcpu->kvm->arch.active_mmu_pages);
+ kvm_mod_used_mmu_pages(vcpu->kvm, +1);
sp->gfn = gfn;
sp->role = role;
--
2.36.0.550.gb090851708-goog
next prev parent reply other threads:[~2022-05-13 20:28 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-13 20:27 [PATCH v5 00/21] KVM: Extend Eager Page Splitting to the shadow MMU David Matlack
2022-05-13 20:27 ` [PATCH v5 01/21] KVM: x86/mmu: Optimize MMU page cache lookup for all direct SPs David Matlack
2022-05-13 20:28 ` [PATCH v5 02/21] KVM: x86/mmu: Use a bool for direct David Matlack
2022-05-13 20:28 ` [PATCH v5 03/21] KVM: x86/mmu: Derive shadow MMU page role from parent David Matlack
2022-05-16 6:54 ` Lai Jiangshan
2022-05-16 21:38 ` David Matlack
2022-05-13 20:28 ` [PATCH v5 04/21] KVM: x86/mmu: Always pass 0 for @quadrant when gptes are 8 bytes David Matlack
2022-05-13 20:28 ` [PATCH v5 05/21] KVM: x86/mmu: Decompose kvm_mmu_get_page() into separate functions David Matlack
2022-05-13 20:28 ` David Matlack [this message]
2022-05-13 20:28 ` [PATCH v5 07/21] KVM: x86/mmu: Rename shadow MMU functions that deal with shadow pages David Matlack
2022-05-13 20:28 ` [PATCH v5 08/21] KVM: x86/mmu: Move guest PT write-protection to account_shadowed() David Matlack
2022-05-13 20:28 ` [PATCH v5 09/21] KVM: x86/mmu: Pass memory caches to allocate SPs separately David Matlack
2022-05-13 20:28 ` [PATCH v5 10/21] KVM: x86/mmu: Replace vcpu with kvm in kvm_mmu_alloc_shadow_page() David Matlack
2022-05-13 20:28 ` [PATCH v5 11/21] KVM: x86/mmu: Pass kvm pointer separately from vcpu to kvm_mmu_find_shadow_page() David Matlack
2022-05-13 20:28 ` [PATCH v5 12/21] KVM: x86/mmu: Allow NULL @vcpu in kvm_mmu_find_shadow_page() David Matlack
2022-05-13 20:28 ` [PATCH v5 13/21] KVM: x86/mmu: Pass const memslot to rmap_add() David Matlack
2022-05-13 20:28 ` [PATCH v5 14/21] KVM: x86/mmu: Decouple rmap_add() and link_shadow_page() from kvm_vcpu David Matlack
2022-05-13 20:28 ` [PATCH v5 15/21] KVM: x86/mmu: Update page stats in __rmap_add() David Matlack
2022-05-13 20:28 ` [PATCH v5 16/21] KVM: x86/mmu: Cache the access bits of shadowed translations David Matlack
2022-05-13 20:28 ` [PATCH v5 17/21] KVM: x86/mmu: Extend make_huge_page_split_spte() for the shadow MMU David Matlack
2022-05-13 20:28 ` [PATCH v5 18/21] KVM: x86/mmu: Zap collapsible SPTEs in shadow MMU at all possible levels David Matlack
2022-05-13 20:28 ` [PATCH v5 19/21] KVM: x86/mmu: Refactor drop_large_spte() David Matlack
2022-05-13 20:28 ` [PATCH v5 20/21] KVM: Allow for different capacities in kvm_mmu_memory_cache structs David Matlack
2022-05-15 11:42 ` Marc Zyngier
2022-05-16 3:31 ` Anup Patel
2022-05-16 23:23 ` David Matlack
2022-05-16 14:49 ` Sean Christopherson
2022-05-16 16:39 ` David Matlack
2022-05-16 17:53 ` Sean Christopherson
2022-05-13 20:28 ` [PATCH v5 21/21] KVM: x86/mmu: Extend Eager Page Splitting to nested MMUs David Matlack
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