From: Ben Gardon <bgardon@google.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Cannon Matthews <cannonmatthews@google.com>,
Paolo Bonzini <pbonzini@redhat.com>, Peter Xu <peterx@redhat.com>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Peter Shier <pshier@google.com>,
Peter Feiner <pfeiner@google.com>,
Junaid Shahid <junaids@google.com>,
Jim Mattson <jmattson@google.com>,
Yulei Zhang <yulei.kernel@gmail.com>,
Wanpeng Li <kernellwp@gmail.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Xiao Guangrong <xiaoguangrong.eric@gmail.com>,
Ben Gardon <bgardon@google.com>
Subject: [PATCH 11/22] kvm: mmu: Factor out allocating a new tdp_mmu_page
Date: Fri, 25 Sep 2020 14:22:51 -0700 [thread overview]
Message-ID: <20200925212302.3979661-12-bgardon@google.com> (raw)
In-Reply-To: <20200925212302.3979661-1-bgardon@google.com>
Move the code to allocate a struct kvm_mmu_page for the TDP MMU out of the
root allocation code to support allocating a struct kvm_mmu_page for every
page of page table memory used by the TDP MMU, in the next commit.
Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell
machine. This series introduced no new failures.
This series can be viewed in Gerrit at:
https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538
Signed-off-by: Ben Gardon <bgardon@google.com>
---
arch/x86/kvm/mmu/tdp_mmu.c | 59 ++++++++++++++++++++++++--------------
1 file changed, 38 insertions(+), 21 deletions(-)
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 37bdebc2592ea..a3bcee6bf30e8 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -123,27 +123,50 @@ static struct kvm_mmu_page *find_tdp_mmu_root_with_role(
return NULL;
}
-static struct kvm_mmu_page *alloc_tdp_mmu_root(struct kvm_vcpu *vcpu,
- union kvm_mmu_page_role role)
+static union kvm_mmu_page_role page_role_for_level(struct kvm_vcpu *vcpu,
+ int level)
+{
+ union kvm_mmu_page_role role;
+
+ role = vcpu->arch.mmu->mmu_role.base;
+ role.level = vcpu->arch.mmu->shadow_root_level;
+ role.direct = true;
+ role.gpte_is_8_bytes = true;
+ role.access = ACC_ALL;
+
+ return role;
+}
+
+static struct kvm_mmu_page *alloc_tdp_mmu_page(struct kvm_vcpu *vcpu, gfn_t gfn,
+ int level)
+{
+ 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);
+ set_page_private(virt_to_page(sp->spt), (unsigned long)sp);
+
+ sp->role.word = page_role_for_level(vcpu, level).word;
+ sp->gfn = gfn;
+ sp->tdp_mmu_page = true;
+
+ return sp;
+}
+
+static struct kvm_mmu_page *alloc_tdp_mmu_root(struct kvm_vcpu *vcpu)
{
struct kvm_mmu_page *new_root;
struct kvm_mmu_page *root;
- new_root = kvm_mmu_memory_cache_alloc(
- &vcpu->arch.mmu_page_header_cache);
- new_root->spt = kvm_mmu_memory_cache_alloc(
- &vcpu->arch.mmu_shadow_page_cache);
- set_page_private(virt_to_page(new_root->spt), (unsigned long)new_root);
-
- new_root->role.word = role.word;
+ new_root = alloc_tdp_mmu_page(vcpu, 0,
+ vcpu->arch.mmu->shadow_root_level);
new_root->root_count = 1;
- new_root->gfn = 0;
- new_root->tdp_mmu_page = true;
spin_lock(&vcpu->kvm->mmu_lock);
/* Check that no matching root exists before adding this one. */
- root = find_tdp_mmu_root_with_role(vcpu->kvm, role);
+ root = find_tdp_mmu_root_with_role(vcpu->kvm,
+ page_role_for_level(vcpu, vcpu->arch.mmu->shadow_root_level));
if (root) {
get_tdp_mmu_root(vcpu->kvm, root);
spin_unlock(&vcpu->kvm->mmu_lock);
@@ -161,18 +184,12 @@ static struct kvm_mmu_page *alloc_tdp_mmu_root(struct kvm_vcpu *vcpu,
static struct kvm_mmu_page *get_tdp_mmu_vcpu_root(struct kvm_vcpu *vcpu)
{
struct kvm_mmu_page *root;
- union kvm_mmu_page_role role;
-
- role = vcpu->arch.mmu->mmu_role.base;
- role.level = vcpu->arch.mmu->shadow_root_level;
- role.direct = true;
- role.gpte_is_8_bytes = true;
- role.access = ACC_ALL;
spin_lock(&vcpu->kvm->mmu_lock);
/* Search for an already allocated root with the same role. */
- root = find_tdp_mmu_root_with_role(vcpu->kvm, role);
+ root = find_tdp_mmu_root_with_role(vcpu->kvm,
+ page_role_for_level(vcpu, vcpu->arch.mmu->shadow_root_level));
if (root) {
get_tdp_mmu_root(vcpu->kvm, root);
spin_unlock(&vcpu->kvm->mmu_lock);
@@ -182,7 +199,7 @@ static struct kvm_mmu_page *get_tdp_mmu_vcpu_root(struct kvm_vcpu *vcpu)
spin_unlock(&vcpu->kvm->mmu_lock);
/* If there is no appropriate root, allocate one. */
- root = alloc_tdp_mmu_root(vcpu, role);
+ root = alloc_tdp_mmu_root(vcpu);
return root;
}
--
2.28.0.709.gb0816b6eb0-goog
next prev parent reply other threads:[~2020-09-25 21:24 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-25 21:22 [PATCH 00/22] Introduce the TDP MMU Ben Gardon
2020-09-25 21:22 ` [PATCH 01/22] kvm: mmu: Separate making SPTEs from set_spte Ben Gardon
2020-09-30 4:55 ` Sean Christopherson
2020-09-30 23:03 ` Ben Gardon
2020-09-25 21:22 ` [PATCH 02/22] kvm: mmu: Introduce tdp_iter Ben Gardon
2020-09-26 0:04 ` Paolo Bonzini
2020-09-30 5:06 ` Sean Christopherson
2020-09-26 0:54 ` Paolo Bonzini
2020-09-30 5:08 ` Sean Christopherson
2020-09-30 5:24 ` Sean Christopherson
2020-09-30 6:24 ` Paolo Bonzini
2020-09-30 23:20 ` Eric van Tassell
2020-09-30 23:34 ` Paolo Bonzini
2020-10-01 0:07 ` Sean Christopherson
2020-09-25 21:22 ` [PATCH 03/22] kvm: mmu: Init / Uninit the TDP MMU Ben Gardon
2020-09-26 0:06 ` Paolo Bonzini
2020-09-30 5:34 ` Sean Christopherson
2020-09-30 18:36 ` Ben Gardon
2020-09-30 16:57 ` Sean Christopherson
2020-09-30 17:39 ` Paolo Bonzini
2020-09-30 18:42 ` Ben Gardon
2020-09-25 21:22 ` [PATCH 04/22] kvm: mmu: Allocate and free TDP MMU roots Ben Gardon
2020-09-30 6:06 ` Sean Christopherson
2020-09-30 6:26 ` Paolo Bonzini
2020-09-30 15:38 ` Sean Christopherson
2020-10-12 22:59 ` Ben Gardon
2020-10-12 23:59 ` Sean Christopherson
2020-09-25 21:22 ` [PATCH 05/22] kvm: mmu: Add functions to handle changed TDP SPTEs Ben Gardon
2020-09-26 0:39 ` Paolo Bonzini
2020-09-28 17:23 ` Paolo Bonzini
2020-09-25 21:22 ` [PATCH 06/22] kvm: mmu: Make address space ID a property of memslots Ben Gardon
2020-09-30 6:10 ` Sean Christopherson
2020-09-30 23:11 ` Ben Gardon
2020-09-25 21:22 ` [PATCH 07/22] kvm: mmu: Support zapping SPTEs in the TDP MMU Ben Gardon
2020-09-26 0:14 ` Paolo Bonzini
2020-09-30 6:15 ` Sean Christopherson
2020-09-30 6:28 ` Paolo Bonzini
2020-09-25 21:22 ` [PATCH 08/22] kvm: mmu: Separate making non-leaf sptes from link_shadow_page Ben Gardon
2020-09-25 21:22 ` [PATCH 09/22] kvm: mmu: Remove disallowed_hugepage_adjust shadow_walk_iterator arg Ben Gardon
2020-09-30 16:19 ` Sean Christopherson
2020-09-25 21:22 ` [PATCH 10/22] kvm: mmu: Add TDP MMU PF handler Ben Gardon
2020-09-26 0:24 ` Paolo Bonzini
2020-09-30 16:37 ` Sean Christopherson
2020-09-30 16:55 ` Paolo Bonzini
2020-09-30 17:37 ` Paolo Bonzini
2020-10-06 22:35 ` Ben Gardon
2020-10-06 22:33 ` Ben Gardon
2020-10-07 20:55 ` Sean Christopherson
2020-09-25 21:22 ` Ben Gardon [this message]
2020-09-26 0:22 ` [PATCH 11/22] kvm: mmu: Factor out allocating a new tdp_mmu_page Paolo Bonzini
2020-09-30 18:53 ` Ben Gardon
2020-09-25 21:22 ` [PATCH 12/22] kvm: mmu: Allocate struct kvm_mmu_pages for all pages in TDP MMU Ben Gardon
2020-09-25 21:22 ` [PATCH 13/22] kvm: mmu: Support invalidate range MMU notifier for " Ben Gardon
2020-09-30 17:03 ` Sean Christopherson
2020-09-30 23:15 ` Ben Gardon
2020-09-30 23:24 ` Sean Christopherson
2020-09-30 23:27 ` Ben Gardon
2020-09-25 21:22 ` [PATCH 14/22] kvm: mmu: Add access tracking for tdp_mmu Ben Gardon
2020-09-26 0:32 ` Paolo Bonzini
2020-09-30 17:48 ` Sean Christopherson
2020-10-06 23:38 ` Ben Gardon
2020-09-25 21:22 ` [PATCH 15/22] kvm: mmu: Support changed pte notifier in tdp MMU Ben Gardon
2020-09-26 0:33 ` Paolo Bonzini
2020-09-28 15:11 ` Paolo Bonzini
2020-10-07 16:53 ` Ben Gardon
2020-10-07 17:18 ` Paolo Bonzini
2020-10-07 17:30 ` Ben Gardon
2020-10-07 17:54 ` Paolo Bonzini
2020-09-25 21:22 ` [PATCH 16/22] kvm: mmu: Add dirty logging handler for changed sptes Ben Gardon
2020-09-26 0:45 ` Paolo Bonzini
2020-09-25 21:22 ` [PATCH 17/22] kvm: mmu: Support dirty logging for the TDP MMU Ben Gardon
2020-09-26 1:04 ` Paolo Bonzini
2020-10-08 18:27 ` Ben Gardon
2020-09-29 15:07 ` Paolo Bonzini
2020-09-30 18:04 ` Sean Christopherson
2020-09-30 18:08 ` Paolo Bonzini
2020-09-25 21:22 ` [PATCH 18/22] kvm: mmu: Support disabling dirty logging for the tdp MMU Ben Gardon
2020-09-26 1:09 ` Paolo Bonzini
2020-10-07 16:30 ` Ben Gardon
2020-10-07 17:21 ` Paolo Bonzini
2020-10-07 17:28 ` Ben Gardon
2020-10-07 17:53 ` Paolo Bonzini
2020-09-25 21:22 ` [PATCH 19/22] kvm: mmu: Support write protection for nesting in " Ben Gardon
2020-09-30 18:06 ` Sean Christopherson
2020-09-25 21:23 ` [PATCH 20/22] kvm: mmu: NX largepage recovery for TDP MMU Ben Gardon
2020-09-26 1:14 ` Paolo Bonzini
2020-09-30 22:23 ` Ben Gardon
2020-09-29 18:24 ` Paolo Bonzini
2020-09-30 18:15 ` Sean Christopherson
2020-09-30 19:56 ` Paolo Bonzini
2020-09-30 22:33 ` Ben Gardon
2020-09-30 22:27 ` Ben Gardon
2020-09-25 21:23 ` [PATCH 21/22] kvm: mmu: Support MMIO in the " Ben Gardon
2020-09-30 18:19 ` Sean Christopherson
2020-09-25 21:23 ` [PATCH 22/22] kvm: mmu: Don't clear write flooding count for direct roots Ben Gardon
2020-09-26 1:25 ` Paolo Bonzini
2020-10-05 22:48 ` Ben Gardon
2020-10-05 23:44 ` Sean Christopherson
2020-10-06 16:19 ` Ben Gardon
2020-09-26 1:14 ` [PATCH 00/22] Introduce the TDP MMU Paolo Bonzini
2020-09-28 17:31 ` Paolo Bonzini
2020-09-29 17:40 ` Ben Gardon
2020-09-29 18:10 ` Paolo Bonzini
2020-09-30 6:19 ` Sean Christopherson
2020-09-30 6:30 ` Paolo Bonzini
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