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kvm: x86/mmu: Add existing trace points to TDP MMU

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The TDP MMU was initially implemented without some of the usual
tracepoints found in mmu.c. Correct this discrepancy by adding the
missing trace points to the TDP MMU.

Tested: ran the demand paging selftest on an Intel Skylake machine with
	all the trace points used by the TDP MMU enabled and observed
	them firing with expected values.

This patch can be viewed in Gerrit at:
https://linux-review.googlesource.com/c/virt/kvm/kvm/+/3812

Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20201027175944.1183301-1-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Ben Gardon 2020-10-27 10:59:43 -07:00 committed by Paolo Bonzini
parent dc924b0624
commit 33dd3574f5
1 changed files with 11 additions and 1 deletions
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12
arch/x86/kvm/mmu/tdp_mmu.c
View File

@ -7,6 +7,8 @@
#include "tdp_mmu.h"
#include "spte.h"
#include <trace/events/kvm.h>
#ifdef CONFIG_X86_64
static bool __read_mostly tdp_mmu_enabled = false;
module_param_named(tdp_mmu, tdp_mmu_enabled, bool, 0644);
@ -108,6 +110,8 @@ static struct kvm_mmu_page *alloc_tdp_mmu_page(struct kvm_vcpu *vcpu, gfn_t gfn,
sp->gfn = gfn;
sp->tdp_mmu_page = true;
trace_kvm_mmu_get_page(sp, true);
return sp;
}
@ -278,6 +282,8 @@ static void __handle_changed_spte(struct kvm *kvm, int as_id, gfn_t gfn,
pt = spte_to_child_pt(old_spte, level);
sp = sptep_to_sp(pt);
trace_kvm_mmu_prepare_zap_page(sp);
list_del(&sp->link);
if (sp->lpage_disallowed)
@ -480,11 +486,13 @@ static int tdp_mmu_map_handle_target_level(struct kvm_vcpu *vcpu, int write,
if (unlikely(is_noslot_pfn(pfn))) {
new_spte = make_mmio_spte(vcpu, iter->gfn, ACC_ALL);
trace_mark_mmio_spte(iter->sptep, iter->gfn, new_spte);
} else
} else {
make_spte_ret = make_spte(vcpu, ACC_ALL, iter->level, iter->gfn,
pfn, iter->old_spte, prefault, true,
map_writable, !shadow_accessed_mask,
&new_spte);
trace_kvm_mmu_set_spte(iter->level, iter->gfn, iter->sptep);
}
if (new_spte == iter->old_spte)
ret = RET_PF_SPURIOUS;
@ -698,6 +706,8 @@ static int age_gfn_range(struct kvm *kvm, struct kvm_memory_slot *slot,
tdp_mmu_set_spte_no_acc_track(kvm, &iter, new_spte);
young = 1;
trace_kvm_age_page(iter.gfn, iter.level, slot, young);
}
return young;