On 04/22/2010 09:12 AM, Xiao Guangrong wrote:
Using '!sp->role.cr4_pae' replaces 'PTTYPE == 32' and using
'pte_size = sp->role.cr4_pae ? 8 : 4' replaces sizeof(pt_element_t)
Then no need compile twice for this code
Signed-off-by: Xiao Guangrong<[email protected]>
---
arch/x86/kvm/mmu.c | 60 ++++++++++++++++++++++++++++++++++++++++++-
arch/x86/kvm/paging_tmpl.h | 56 -----------------------------------------
2 files changed, 58 insertions(+), 58 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index abf8bd4..fac7c09 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2256,6 +2256,62 @@ static bool is_rsvd_bits_set(struct kvm_vcpu *vcpu, u64
gpte, int level)
return (gpte& vcpu->arch.mmu.rsvd_bits_mask[bit7][level-1]) != 0;
}
+static void paging_invlpg(struct kvm_vcpu *vcpu, gva_t gva)
+{
+ struct kvm_shadow_walk_iterator iterator;
+ gpa_t pte_gpa = -1;
+ int level;
+ u64 *sptep;
+ int need_flush = 0;
+ unsigned pte_size = 0;
+
+ spin_lock(&vcpu->kvm->mmu_lock);
+
+ for_each_shadow_entry(vcpu, gva, iterator) {
+ level = iterator.level;
+ sptep = iterator.sptep;
+
+ if (level == PT_PAGE_TABLE_LEVEL ||
+ ((level == PT_DIRECTORY_LEVEL&& is_large_pte(*sptep))) ||
+ ((level == PT_PDPE_LEVEL&& is_large_pte(*sptep)))) {
+ struct kvm_mmu_page *sp = page_header(__pa(sptep));
+ int offset = 0;
+
+ if (!sp->role.cr4_pae)
+ offset = sp->role.quadrant<< PT64_LEVEL_BITS;;
+ pte_size = sp->role.cr4_pae ? 8 : 4;
+ pte_gpa = (sp->gfn<< PAGE_SHIFT);
+ pte_gpa += (sptep - sp->spt + offset) * pte_size;
+
+ if (is_shadow_present_pte(*sptep)) {
+ rmap_remove(vcpu->kvm, sptep);
+ if (is_large_pte(*sptep))
+ --vcpu->kvm->stat.lpages;
+ need_flush = 1;
+ }
+ __set_spte(sptep, shadow_trap_nonpresent_pte);
+ break;
+ }
+
+ if (!is_shadow_present_pte(*sptep))
+ break;
+ }
+
+ if (need_flush)
+ kvm_flush_remote_tlbs(vcpu->kvm);
+
+ atomic_inc(&vcpu->kvm->arch.invlpg_counter);
+
+ spin_unlock(&vcpu->kvm->mmu_lock);
+
+ if (pte_gpa == -1)
+ return;
+
+ if (mmu_topup_memory_caches(vcpu))
+ return;
+ kvm_mmu_pte_write(vcpu, pte_gpa, NULL, pte_size, 0);
+}
+
I think we should keep it in - kvm_mmu_pte_write() calls back to
FNAME(update_pte), we could make the call directly from here speed
things up, since we already have the spte and don't need to look it up.
--
Do not meddle in the internals of kernels, for they are subtle and quick to
panic.
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