Lines Matching +full:tlb +full:- +full:split

1 /* SPDX-License-Identifier: GPL-2.0 */
40 	(((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)
52 	return ((2ULL << (e - s)) - 1) << s;  in rsvd_bits()
71 	if (likely(vcpu->arch.mmu->root_hpa != INVALID_PAGE))  in kvm_mmu_reload()
93 	u64 root_hpa = vcpu->arch.mmu->root_hpa;  in kvm_mmu_load_pgd()
99 				 vcpu->arch.mmu->shadow_root_level);  in kvm_mmu_load_pgd()
109 	if (likely(vcpu->arch.mmu->page_fault == kvm_tdp_page_fault))  in kvm_mmu_do_page_fault()
112 	return vcpu->arch.mmu->page_fault(vcpu, cr2_or_gpa, err, prefault);  in kvm_mmu_do_page_fault()
116  * Currently, we have two sorts of write-protection, a) the first one
117  * write-protects guest page to sync the guest modification, b) another one is
121  * 2) the first case requires flushing tlb immediately avoiding corrupting
123  *    mmu-lock. And the another case does not need to flush tlb until returning
124  *    the dirty bitmap to userspace since it only write-protects the page
126  *    missed, so it can flush tlb out of mmu-lock.
128  * So, there is the problem: the first case can meet the corrupted tlb caused
129  * by another case which write-protects pages but without flush tlb
131  * it flush tlb if we try to write-protect a spte whose SPTE_MMU_WRITEABLE bit
136  * readonly, if that happens, we need to flush tlb. Fortunately,
140  * - if we want to see if it has writable tlb entry or if the spte can be
143  * - if we fix page fault on the spte or do write-protection by dirty logging,
146  * TODO: introduce APIs to split these two cases.
176 	 * If CPL = 3, SMAP applies to all supervisor-mode data accesses  in permission_fault()
186 	unsigned long smap = (cpl - 3) & (rflags & X86_EFLAGS_AC);  in permission_fault()
188 		    (smap >> (X86_EFLAGS_AC_BIT - PFERR_RSVD_BIT + 1));  in permission_fault()
189 	bool fault = (mmu->permissions[index] >> pte_access) & 1;  in permission_fault()
193 	if (unlikely(mmu->pkru_mask)) {  in permission_fault()
202 		pkru_bits = (vcpu->arch.pkru >> (pte_pkey * 2)) & 3;  in permission_fault()
206 			((pte_access & PT_USER_MASK) << (PFERR_RSVD_BIT - PT_USER_SHIFT));  in permission_fault()
208 		pkru_bits &= mmu->pkru_mask >> offset;  in permission_fault()
209 		errcode |= -pkru_bits & PFERR_PK_MASK;  in permission_fault()
213 	return -(u32)fault & errcode;  in permission_fault()