kvm-unit-tests/x86/access.c

6 #include "access.h"
34  * Page table access check tests.  Each number/bit represent an individual
875 		      "unexpected access");  in ac_test_do_access()
984  * If the write-fault access is from supervisor and CR0.WP is not set on the
985  * vcpu, kvm will fix it by adjusting pte access - it sets the W bit on pte
986  * and clears U bit. This is the chance that kvm can change pte access from
989  * Unfortunately, the pte access is the access of 'direct' shadow page table,
990  * means direct sp.role.access = pte_access, then we will create a writable
1100 	 * the access test and toggle EFER.NX to coerce KVM into rebuilding  in do_cr0_wp_access()
1181 		printf("%s: read access at1 fail\n", __FUNCTION__);  in check_effective_sp_permissions()
1187 		printf("%s: write access at2 fail\n", __FUNCTION__);  in check_effective_sp_permissions()
1193 		printf("%s: read access at3 fail\n", __FUNCTION__);  in check_effective_sp_permissions()
1199 		printf("%s: write access at4 should fail\n", __FUNCTION__);  in check_effective_sp_permissions()