From: Ben Gardon <bgardon@google.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>, Peter Xu <peterx@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Peter Shier <pshier@google.com>,
David Matlack <dmatlack@google.com>,
Mingwei Zhang <mizhang@google.com>,
Yulei Zhang <yulei.kernel@gmail.com>,
Wanpeng Li <kernellwp@gmail.com>,
Xiao Guangrong <xiaoguangrong.eric@gmail.com>,
Kai Huang <kai.huang@intel.com>,
Keqian Zhu <zhukeqian1@huawei.com>,
David Hildenbrand <david@redhat.com>,
Ben Gardon <bgardon@google.com>
Subject: [RFC 10/19] KVM: x86/mmu: Remove need for a vcpu from mmu_try_to_unsync_pages
Date: Wed, 10 Nov 2021 14:30:01 -0800 [thread overview]
Message-ID: <20211110223010.1392399-11-bgardon@google.com> (raw)
In-Reply-To: <20211110223010.1392399-1-bgardon@google.com>
The vCPU argument to mmu_try_to_unsync_pages is now only used to get a
pointer to the associated struct kvm, so pass in the kvm pointer from
the beginning to remove the need for a vCPU when calling the function.
Signed-off-by: Ben Gardon <bgardon@google.com>
---
arch/x86/kvm/mmu/mmu.c | 16 ++++++++--------
arch/x86/kvm/mmu/mmu_internal.h | 2 +-
arch/x86/kvm/mmu/spte.c | 2 +-
3 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 7d0da79668c0..1e890509b93f 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2561,10 +2561,10 @@ static int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva)
return r;
}
-static void kvm_unsync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
+static void kvm_unsync_page(struct kvm *kvm, struct kvm_mmu_page *sp)
{
trace_kvm_mmu_unsync_page(sp);
- ++vcpu->kvm->stat.mmu_unsync;
+ ++kvm->stat.mmu_unsync;
sp->unsync = 1;
kvm_mmu_mark_parents_unsync(sp);
@@ -2576,7 +2576,7 @@ static void kvm_unsync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
* were marked unsync (or if there is no shadow page), -EPERM if the SPTE must
* be write-protected.
*/
-int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
+int mmu_try_to_unsync_pages(struct kvm *kvm, struct kvm_memory_slot *slot,
gfn_t gfn, bool can_unsync, bool prefetch)
{
struct kvm_mmu_page *sp;
@@ -2587,7 +2587,7 @@ int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
* track machinery is used to write-protect upper-level shadow pages,
* i.e. this guards the role.level == 4K assertion below!
*/
- if (kvm_slot_page_track_is_active(vcpu->kvm, slot, gfn, KVM_PAGE_TRACK_WRITE))
+ if (kvm_slot_page_track_is_active(kvm, slot, gfn, KVM_PAGE_TRACK_WRITE))
return -EPERM;
/*
@@ -2596,7 +2596,7 @@ int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
* that case, KVM must complete emulation of the guest TLB flush before
* allowing shadow pages to become unsync (writable by the guest).
*/
- for_each_gfn_indirect_valid_sp(vcpu->kvm, sp, gfn) {
+ for_each_gfn_indirect_valid_sp(kvm, sp, gfn) {
if (!can_unsync)
return -EPERM;
@@ -2615,7 +2615,7 @@ int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
*/
if (!locked) {
locked = true;
- spin_lock(&vcpu->kvm->arch.mmu_unsync_pages_lock);
+ spin_lock(&kvm->arch.mmu_unsync_pages_lock);
/*
* Recheck after taking the spinlock, a different vCPU
@@ -2630,10 +2630,10 @@ int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
}
WARN_ON(sp->role.level != PG_LEVEL_4K);
- kvm_unsync_page(vcpu, sp);
+ kvm_unsync_page(kvm, sp);
}
if (locked)
- spin_unlock(&vcpu->kvm->arch.mmu_unsync_pages_lock);
+ spin_unlock(&kvm->arch.mmu_unsync_pages_lock);
/*
* We need to ensure that the marking of unsync pages is visible
diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h
index 52c6527b1a06..1073d10cce91 100644
--- a/arch/x86/kvm/mmu/mmu_internal.h
+++ b/arch/x86/kvm/mmu/mmu_internal.h
@@ -118,7 +118,7 @@ static inline bool kvm_vcpu_ad_need_write_protect(struct kvm_vcpu *vcpu)
kvm_x86_ops.cpu_dirty_log_size;
}
-int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
+int mmu_try_to_unsync_pages(struct kvm *kvm, struct kvm_memory_slot *slot,
gfn_t gfn, bool can_unsync, bool prefetch);
void kvm_mmu_gfn_disallow_lpage(const struct kvm_memory_slot *slot, gfn_t gfn);
diff --git a/arch/x86/kvm/mmu/spte.c b/arch/x86/kvm/mmu/spte.c
index 75c666d3e7f1..b7271daa06c5 100644
--- a/arch/x86/kvm/mmu/spte.c
+++ b/arch/x86/kvm/mmu/spte.c
@@ -160,7 +160,7 @@ bool make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
* e.g. it's write-tracked (upper-level SPs) or has one or more
* shadow pages and unsync'ing pages is not allowed.
*/
- if (mmu_try_to_unsync_pages(vcpu, slot, gfn, can_unsync, prefetch)) {
+ if (mmu_try_to_unsync_pages(vcpu->kvm, slot, gfn, can_unsync, prefetch)) {
pgprintk("%s: found shadow page for %llx, marking ro\n",
__func__, gfn);
wrprot = true;
--
2.34.0.rc0.344.g81b53c2807-goog
next prev parent reply other threads:[~2021-11-10 22:31 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-10 22:29 [RFC 00/19] KVM: x86/mmu: Optimize disabling dirty logging Ben Gardon
2021-11-10 22:29 ` [RFC 01/19] KVM: x86/mmu: Fix TLB flush range when handling disconnected pt Ben Gardon
2021-11-11 17:44 ` David Matlack
2021-11-10 22:29 ` [RFC 02/19] KVM: x86/mmu: Batch TLB flushes for a single zap Ben Gardon
2021-11-11 18:06 ` David Matlack
2021-11-12 23:53 ` Sean Christopherson
2021-11-10 22:29 ` [RFC 03/19] KVM: x86/mmu: Factor flush and free up when zapping under MMU write lock Ben Gardon
2021-11-11 18:31 ` David Matlack
2021-11-10 22:29 ` [RFC 04/19] KVM: x86/mmu: Yield while processing disconnected_sps Ben Gardon
2021-11-11 18:50 ` David Matlack
2021-11-10 22:29 ` [RFC 05/19] KVM: x86/mmu: Remove redundant flushes when disabling dirty logging Ben Gardon
2021-11-11 18:55 ` David Matlack
2021-11-10 22:29 ` [RFC 06/19] KVM: x86/mmu: Introduce vcpu_make_spte Ben Gardon
2021-11-10 22:29 ` [RFC 07/19] KVM: x86/mmu: Factor wrprot for nested PML out of make_spte Ben Gardon
2021-11-18 2:12 ` Sean Christopherson
2021-11-18 17:43 ` Ben Gardon
2021-11-18 18:04 ` Paolo Bonzini
2021-11-10 22:29 ` [RFC 08/19] KVM: x86/mmu: Factor mt_mask " Ben Gardon
2021-11-10 22:30 ` [RFC 09/19] KVM: x86/mmu: Remove need for a vcpu from kvm_slot_page_track_is_active Ben Gardon
2021-11-10 22:30 ` Ben Gardon [this message]
2021-11-10 22:30 ` [RFC 11/19] KVM: x86/mmu: Factor shadow_zero_check out of make_spte Ben Gardon
2021-11-10 22:44 ` Paolo Bonzini
2021-11-10 23:49 ` Ben Gardon
2021-11-11 1:18 ` Sean Christopherson
2021-11-11 1:44 ` Sean Christopherson
2021-11-11 7:06 ` Paolo Bonzini
2021-11-18 2:05 ` Sean Christopherson
2021-11-18 3:29 ` Sean Christopherson
2021-11-18 16:37 ` Sean Christopherson
2021-11-18 17:19 ` Paolo Bonzini
2021-11-18 18:02 ` Sean Christopherson
2021-11-18 18:07 ` Paolo Bonzini
2021-11-18 18:14 ` Sean Christopherson
2021-11-10 22:30 ` [RFC 12/19] KVM: x86/mmu: Replace vcpu argument with kvm pointer in make_spte Ben Gardon
2021-11-10 22:30 ` [RFC 13/19] KVM: x86/mmu: Factor out the meat of reset_tdp_shadow_zero_bits_mask Ben Gardon
2021-11-10 22:30 ` [RFC 14/19] KVM: x86/mmu: Propagate memslot const qualifier Ben Gardon
2021-11-10 22:30 ` [RFC 15/19] KVM: x86/MMU: Refactor vmx_get_mt_mask Ben Gardon
2021-11-10 22:30 ` [RFC 16/19] KVM: x86/mmu: Factor out part of vmx_get_mt_mask which does not depend on vcpu Ben Gardon
2021-11-10 22:30 ` [RFC 17/19] KVM: x86/mmu: Add try_get_mt_mask to x86_ops Ben Gardon
2021-11-10 22:30 ` [RFC 18/19] KVM: x86/mmu: Make kvm_is_mmio_pfn usable outside of spte.c Ben Gardon
2021-11-10 22:30 ` [RFC 19/19] KVM: x86/mmu: Promote pages in-place when disabling dirty logging Ben Gardon
2021-11-15 21:24 ` [RFC 00/19] KVM: x86/mmu: Optimize " Ben Gardon
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