Commit 81764725 authored by Peng Hao's avatar Peng Hao Committed by Paolo Bonzini
Browse files

kvm: x86: Adjust the location of pkru_mask of kvm_mmu to reduce memory 



Adjust the field pkru_mask to the back of direct_map to make up 8-byte
alignment.This reduces the size of kvm_mmu by 8 bytes.

Signed-off-by: default avatarPeng Hao <flyingpeng@tencent.com>
Message-Id: <20220228030749.88353-1-flyingpeng@tencent.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 42c35fdc

arch/x86/include/asm/kvm_host.h

+9 −8
Original line number Diff line number Diff line
@@ -443,14 +443,6 @@ struct kvm_mmu { 
	u8 shadow_root_level;

	u8 ept_ad;

	bool direct_map;

	struct kvm_mmu_root_info prev_roots[KVM_MMU_NUM_PREV_ROOTS];



	/*

	 * Bitmap; bit set = permission fault

	 * Byte index: page fault error code [4:1]

	 * Bit index: pte permissions in ACC_* format

	 */

	u8 permissions[16];



	/*

	* The pkru_mask indicates if protection key checks are needed.  It
@@ -460,6 +452,15 @@ struct kvm_mmu { 
	*/

	u32 pkru_mask;



	struct kvm_mmu_root_info prev_roots[KVM_MMU_NUM_PREV_ROOTS];



	/*

	 * Bitmap; bit set = permission fault

	 * Byte index: page fault error code [4:1]

	 * Bit index: pte permissions in ACC_* format

	 */

	u8 permissions[16];



	u64 *pae_root;

	u64 *pml4_root;

	u64 *pml5_root;