helper.c (ff7de2fc2c994030bfb83af9ddc9a3cd70ce3e88) helper.c (ce3125bed935a12e619a8253c19340ecaa899347)
1/*
2 * ARM generic helpers.
3 *
4 * This code is licensed under the GNU GPL v2 or later.
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 */
8

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9903{
9904 return simple_ap_to_rw_prot_is_user(ap, regime_is_user(env, mmu_idx));
9905}
9906
9907/* Translate S2 section/page access permissions to protection flags
9908 *
9909 * @env: CPUARMState
9910 * @s2ap: The 2-bit stage2 access permissions (S2AP)
1/*
2 * ARM generic helpers.
3 *
4 * This code is licensed under the GNU GPL v2 or later.
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 */
8

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9903{
9904 return simple_ap_to_rw_prot_is_user(ap, regime_is_user(env, mmu_idx));
9905}
9906
9907/* Translate S2 section/page access permissions to protection flags
9908 *
9909 * @env: CPUARMState
9910 * @s2ap: The 2-bit stage2 access permissions (S2AP)
9911 * @xn: XN (execute-never) bit
9911 * @xn: XN (execute-never) bits
9912 * @s1_is_el0: true if this is S2 of an S1+2 walk for EL0
9912 */
9913 */
9913static int get_S2prot(CPUARMState *env, int s2ap, int xn)
9914static int get_S2prot(CPUARMState *env, int s2ap, int xn, bool s1_is_el0)
9914{
9915 int prot = 0;
9916
9917 if (s2ap & 1) {
9918 prot |= PAGE_READ;
9919 }
9920 if (s2ap & 2) {
9921 prot |= PAGE_WRITE;
9922 }
9915{
9916 int prot = 0;
9917
9918 if (s2ap & 1) {
9919 prot |= PAGE_READ;
9920 }
9921 if (s2ap & 2) {
9922 prot |= PAGE_WRITE;
9923 }
9923 if (!xn) {
9924 if (arm_el_is_aa64(env, 2) || prot & PAGE_READ) {
9924
9925 if (cpu_isar_feature(any_tts2uxn, env_archcpu(env))) {
9926 switch (xn) {
9927 case 0:
9925 prot |= PAGE_EXEC;
9928 prot |= PAGE_EXEC;
9929 break;
9930 case 1:
9931 if (s1_is_el0) {
9932 prot |= PAGE_EXEC;
9933 }
9934 break;
9935 case 2:
9936 break;
9937 case 3:
9938 if (!s1_is_el0) {
9939 prot |= PAGE_EXEC;
9940 }
9941 break;
9942 default:
9943 g_assert_not_reached();
9926 }
9944 }
9945 } else {
9946 if (!extract32(xn, 1, 1)) {
9947 if (arm_el_is_aa64(env, 2) || prot & PAGE_READ) {
9948 prot |= PAGE_EXEC;
9949 }
9950 }
9927 }
9928 return prot;
9929}
9930
9931/* Translate section/page access permissions to protection flags
9932 *
9933 * @env: CPUARMState
9934 * @mmu_idx: MMU index indicating required translation regime

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10896 */
10897 fault_type = ARMFault_AccessFlag;
10898 if ((attrs & (1 << 8)) == 0) {
10899 /* Access flag */
10900 goto do_fault;
10901 }
10902
10903 ap = extract32(attrs, 4, 2);
9951 }
9952 return prot;
9953}
9954
9955/* Translate section/page access permissions to protection flags
9956 *
9957 * @env: CPUARMState
9958 * @mmu_idx: MMU index indicating required translation regime

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10920 */
10921 fault_type = ARMFault_AccessFlag;
10922 if ((attrs & (1 << 8)) == 0) {
10923 /* Access flag */
10924 goto do_fault;
10925 }
10926
10927 ap = extract32(attrs, 4, 2);
10904 xn = extract32(attrs, 12, 1);
10905
10906 if (mmu_idx == ARMMMUIdx_Stage2) {
10907 ns = true;
10928
10929 if (mmu_idx == ARMMMUIdx_Stage2) {
10930 ns = true;
10908 *prot = get_S2prot(env, ap, xn);
10931 xn = extract32(attrs, 11, 2);
10932 *prot = get_S2prot(env, ap, xn, s1_is_el0);
10909 } else {
10910 ns = extract32(attrs, 3, 1);
10933 } else {
10934 ns = extract32(attrs, 3, 1);
10935 xn = extract32(attrs, 12, 1);
10911 pxn = extract32(attrs, 11, 1);
10912 *prot = get_S1prot(env, mmu_idx, aarch64, ap, ns, xn, pxn);
10913 }
10914
10915 fault_type = ARMFault_Permission;
10916 if (!(*prot & (1 << access_type))) {
10917 goto do_fault;
10918 }

--- 1893 unchanged lines hidden --- 		10936 pxn = extract32(attrs, 11, 1);
10937 *prot = get_S1prot(env, mmu_idx, aarch64, ap, ns, xn, pxn);
10938 }
10939
10940 fault_type = ARMFault_Permission;
10941 if (!(*prot & (1 << access_type))) {
10942 goto do_fault;
10943 }

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