Move "tdp_mmu_page" into the 1-byte void left by the recently removed
"mmio_cached" so that it resides in the first 64 bytes of kvm_mmu_page,
i.e. in the same cache line as the most commonly accessed fields.
Don't bother wrapping tdp_mmu_page in CONFIG_X86_64, including the field in
32-bit builds doesn't affect the size of kvm_mmu_page, and a future patch
can always wrap the field in the unlikely event KVM gains a 1-byte flag
that is 32-bit specific.
Note, the size of kvm_mmu_page is also unchanged on CONFIG_X86_64=y due
to it previously sharing an 8-byte chunk with write_flooding_count.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
arch/x86/kvm/mmu/mmu_internal.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h
index 9bfa46b35201..4b06e6040e90 100644
--- a/arch/x86/kvm/mmu/mmu_internal.h
+++ b/arch/x86/kvm/mmu/mmu_internal.h
@@ -35,6 +35,7 @@ struct kvm_mmu_page {
struct hlist_node hash_link;
struct list_head lpage_disallowed_link;
+ bool tdp_mmu_page;
bool unsync;
u8 mmu_valid_gen;
bool lpage_disallowed; /* Can't be replaced by an equiv large page */
@@ -70,8 +71,6 @@ struct kvm_mmu_page {
atomic_t write_flooding_count;
#ifdef CONFIG_X86_64
- bool tdp_mmu_page;
-
/* Used for freeing the page asynchronously if it is a TDP MMU page. */
struct rcu_head rcu_head;
#endif
--
2.33.0.153.gba50c8fa24-goog
