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

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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: Peng Hao <flyingpeng@tencent.com>
Message-Id: <20220228030749.88353-1-flyingpeng@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peng Hao
2022-02-28 11:07:49 +08:00
committed by Paolo Bonzini
parent 42c35fdc34
commit 8176472563
1 changed files with 9 additions and 8 deletions
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17
arch/x86/include/asm/kvm_host.h
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@@ -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;