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Subject[RFC PATCH 3/6] KVM: X86: Add arguement gfn and role to kvm_mmu_alloc_page()
Date
From: Lai Jiangshan <laijs@linux.alibaba.com>

kvm_mmu_alloc_page() will access to more bits of the role.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
arch/x86/kvm/mmu/mmu.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 846a2e426e0b..54e7cbc15380 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1734,13 +1734,13 @@ 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, int direct)
+static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, gfn_t gfn, union kvm_mmu_page_role role)
{
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)
+ 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);

@@ -1752,6 +1752,8 @@ static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, int direct
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;
return sp;
}

@@ -2138,10 +2140,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,

++vcpu->kvm->stat.mmu_cache_miss;

- sp = kvm_mmu_alloc_page(vcpu, direct);
-
- sp->gfn = gfn;
- sp->role = role;
+ sp = kvm_mmu_alloc_page(vcpu, gfn, role);
hlist_add_head(&sp->hash_link, sp_list);
if (!direct) {
account_shadowed(vcpu->kvm, sp);
--
2.19.1.6.gb485710b
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