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caab277b | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
9cce7a43 CM |
2 | /* |
3 | * Based on arch/arm/mm/proc.S | |
4 | * | |
5 | * Copyright (C) 2001 Deep Blue Solutions Ltd. | |
6 | * Copyright (C) 2012 ARM Ltd. | |
7 | * Author: Catalin Marinas <catalin.marinas@arm.com> | |
9cce7a43 CM |
8 | */ |
9 | ||
10 | #include <linux/init.h> | |
11 | #include <linux/linkage.h> | |
65fddcfc | 12 | #include <linux/pgtable.h> |
9cce7a43 CM |
13 | #include <asm/assembler.h> |
14 | #include <asm/asm-offsets.h> | |
e51f5f56 | 15 | #include <asm/asm_pointer_auth.h> |
9cce7a43 | 16 | #include <asm/hwcap.h> |
cabe1c81 | 17 | #include <asm/pgtable-hwdef.h> |
104a0c02 AP |
18 | #include <asm/cpufeature.h> |
19 | #include <asm/alternative.h> | |
6982934e | 20 | #include <asm/smp.h> |
3b714d24 | 21 | #include <asm/sysreg.h> |
9cce7a43 | 22 | |
35a86976 CM |
23 | #ifdef CONFIG_ARM64_64K_PAGES |
24 | #define TCR_TG_FLAGS TCR_TG0_64K | TCR_TG1_64K | |
44eaacf1 SP |
25 | #elif defined(CONFIG_ARM64_16K_PAGES) |
26 | #define TCR_TG_FLAGS TCR_TG0_16K | TCR_TG1_16K | |
27 | #else /* CONFIG_ARM64_4K_PAGES */ | |
35a86976 CM |
28 | #define TCR_TG_FLAGS TCR_TG0_4K | TCR_TG1_4K |
29 | #endif | |
30 | ||
e03e61c3 WD |
31 | #ifdef CONFIG_RANDOMIZE_BASE |
32 | #define TCR_KASLR_FLAGS TCR_NFD1 | |
33 | #else | |
34 | #define TCR_KASLR_FLAGS 0 | |
35 | #endif | |
36 | ||
35a86976 | 37 | #define TCR_SMP_FLAGS TCR_SHARED |
9cce7a43 | 38 | |
35a86976 CM |
39 | /* PTWs cacheable, inner/outer WBWA */ |
40 | #define TCR_CACHE_FLAGS TCR_IRGN_WBWA | TCR_ORGN_WBWA | |
41 | ||
21696c16 | 42 | #ifdef CONFIG_KASAN_SW_TAGS |
bfc62c59 | 43 | #define TCR_KASAN_SW_FLAGS TCR_TBI1 | TCR_TBID1 |
21696c16 | 44 | #else |
bfc62c59 VF |
45 | #define TCR_KASAN_SW_FLAGS 0 |
46 | #endif | |
47 | ||
48 | #ifdef CONFIG_KASAN_HW_TAGS | |
f34d93f3 | 49 | #define TCR_KASAN_HW_FLAGS SYS_TCR_EL1_TCMA1 | TCR_TBI1 | TCR_TBID1 |
bfc62c59 VF |
50 | #else |
51 | #define TCR_KASAN_HW_FLAGS 0 | |
21696c16 AK |
52 | #endif |
53 | ||
0178dc76 CM |
54 | /* |
55 | * Default MAIR_EL1. MT_NORMAL_TAGGED is initially mapped as Normal memory and | |
56 | * changed during __cpu_setup to Normal Tagged if the system supports MTE. | |
57 | */ | |
95b3f74b CM |
58 | #define MAIR_EL1_SET \ |
59 | (MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRnE, MT_DEVICE_nGnRnE) | \ | |
60 | MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRE, MT_DEVICE_nGnRE) | \ | |
95b3f74b CM |
61 | MAIR_ATTRIDX(MAIR_ATTR_NORMAL_NC, MT_NORMAL_NC) | \ |
62 | MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL) | \ | |
0178dc76 | 63 | MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL_TAGGED)) |
9cce7a43 | 64 | |
af3cfdbf | 65 | #ifdef CONFIG_CPU_PM |
6732bc65 LP |
66 | /** |
67 | * cpu_do_suspend - save CPU registers context | |
68 | * | |
69 | * x0: virtual address of context pointer | |
6d37d81f ST |
70 | * |
71 | * This must be kept in sync with struct cpu_suspend_ctx in <asm/suspend.h>. | |
6732bc65 | 72 | */ |
f4659254 | 73 | SYM_FUNC_START(cpu_do_suspend) |
6732bc65 LP |
74 | mrs x2, tpidr_el0 |
75 | mrs x3, tpidrro_el0 | |
76 | mrs x4, contextidr_el1 | |
827a108e JPB |
77 | mrs x5, osdlr_el1 |
78 | mrs x6, cpacr_el1 | |
79 | mrs x7, tcr_el1 | |
80 | mrs x8, vbar_el1 | |
81 | mrs x9, mdscr_el1 | |
82 | mrs x10, oslsr_el1 | |
83 | mrs x11, sctlr_el1 | |
6d99b689 | 84 | alternative_if_not ARM64_HAS_VIRT_HOST_EXTN |
827a108e | 85 | mrs x12, tpidr_el1 |
6d99b689 | 86 | alternative_else |
827a108e | 87 | mrs x12, tpidr_el2 |
6d99b689 | 88 | alternative_endif |
827a108e | 89 | mrs x13, sp_el0 |
6732bc65 | 90 | stp x2, x3, [x0] |
827a108e JPB |
91 | stp x4, x5, [x0, #16] |
92 | stp x6, x7, [x0, #32] | |
93 | stp x8, x9, [x0, #48] | |
94 | stp x10, x11, [x0, #64] | |
95 | stp x12, x13, [x0, #80] | |
6d37d81f ST |
96 | /* |
97 | * Save x18 as it may be used as a platform register, e.g. by shadow | |
98 | * call stack. | |
99 | */ | |
100 | str x18, [x0, #96] | |
6732bc65 | 101 | ret |
f4659254 | 102 | SYM_FUNC_END(cpu_do_suspend) |
6732bc65 LP |
103 | |
104 | /** | |
105 | * cpu_do_resume - restore CPU register context | |
106 | * | |
cabe1c81 | 107 | * x0: Address of context pointer |
6732bc65 | 108 | */ |
439e70e2 | 109 | .pushsection ".idmap.text", "awx" |
f4659254 | 110 | SYM_FUNC_START(cpu_do_resume) |
6732bc65 LP |
111 | ldp x2, x3, [x0] |
112 | ldp x4, x5, [x0, #16] | |
cabe1c81 JM |
113 | ldp x6, x8, [x0, #32] |
114 | ldp x9, x10, [x0, #48] | |
115 | ldp x11, x12, [x0, #64] | |
623b476f | 116 | ldp x13, x14, [x0, #80] |
6d37d81f ST |
117 | /* |
118 | * Restore x18, as it may be used as a platform register, and clear | |
119 | * the buffer to minimize the risk of exposure when used for shadow | |
120 | * call stack. | |
121 | */ | |
122 | ldr x18, [x0, #96] | |
123 | str xzr, [x0, #96] | |
6732bc65 LP |
124 | msr tpidr_el0, x2 |
125 | msr tpidrro_el0, x3 | |
126 | msr contextidr_el1, x4 | |
6732bc65 | 127 | msr cpacr_el1, x6 |
cabe1c81 JM |
128 | |
129 | /* Don't change t0sz here, mask those bits when restoring */ | |
827a108e JPB |
130 | mrs x7, tcr_el1 |
131 | bfi x8, x7, TCR_T0SZ_OFFSET, TCR_TxSZ_WIDTH | |
cabe1c81 | 132 | |
6732bc65 LP |
133 | msr tcr_el1, x8 |
134 | msr vbar_el1, x9 | |
744c6c37 JM |
135 | |
136 | /* | |
137 | * __cpu_setup() cleared MDSCR_EL1.MDE and friends, before unmasking | |
138 | * debug exceptions. By restoring MDSCR_EL1 here, we may take a debug | |
0fbeb318 | 139 | * exception. Mask them until local_daif_restore() in cpu_suspend() |
744c6c37 JM |
140 | * resets them. |
141 | */ | |
0fbeb318 | 142 | disable_daif |
6732bc65 | 143 | msr mdscr_el1, x10 |
744c6c37 | 144 | |
cabe1c81 | 145 | msr sctlr_el1, x12 |
6d99b689 | 146 | alternative_if_not ARM64_HAS_VIRT_HOST_EXTN |
623b476f | 147 | msr tpidr_el1, x13 |
6d99b689 JM |
148 | alternative_else |
149 | msr tpidr_el2, x13 | |
150 | alternative_endif | |
623b476f | 151 | msr sp_el0, x14 |
6732bc65 LP |
152 | /* |
153 | * Restore oslsr_el1 by writing oslar_el1 | |
154 | */ | |
827a108e | 155 | msr osdlr_el1, x5 |
6732bc65 LP |
156 | ubfx x11, x11, #1, #1 |
157 | msr oslar_el1, x11 | |
f436b2ac | 158 | reset_pmuserenr_el0 x0 // Disable PMU access from EL0 |
87a1f063 | 159 | reset_amuserenr_el0 x0 // Disable AMU access from EL0 |
68ddbf09 JM |
160 | |
161 | alternative_if ARM64_HAS_RAS_EXTN | |
162 | msr_s SYS_DISR_EL1, xzr | |
163 | alternative_else_nop_endif | |
164 | ||
d0055da5 | 165 | ptrauth_keys_install_kernel_nosync x14, x1, x2, x3 |
6732bc65 LP |
166 | isb |
167 | ret | |
f4659254 | 168 | SYM_FUNC_END(cpu_do_resume) |
b6113038 | 169 | .popsection |
6732bc65 LP |
170 | #endif |
171 | ||
439e70e2 | 172 | .pushsection ".idmap.text", "awx" |
f992b4df WD |
173 | |
174 | .macro __idmap_cpu_set_reserved_ttbr1, tmp1, tmp2 | |
833be850 | 175 | adrp \tmp1, reserved_pg_dir |
fa0465fc | 176 | phys_to_ttbr \tmp2, \tmp1 |
c812026c | 177 | offset_ttbr1 \tmp2, \tmp1 |
f992b4df WD |
178 | msr ttbr1_el1, \tmp2 |
179 | isb | |
180 | tlbi vmalle1 | |
181 | dsb nsh | |
182 | isb | |
183 | .endm | |
184 | ||
50e1881d | 185 | /* |
5ffdfaed | 186 | * void idmap_cpu_replace_ttbr1(phys_addr_t ttbr1) |
50e1881d MR |
187 | * |
188 | * This is the low-level counterpart to cpu_replace_ttbr1, and should not be | |
189 | * called by anything else. It can only be executed from a TTBR0 mapping. | |
190 | */ | |
f4659254 | 191 | SYM_FUNC_START(idmap_cpu_replace_ttbr1) |
0fbeb318 | 192 | save_and_disable_daif flags=x2 |
50e1881d | 193 | |
f992b4df | 194 | __idmap_cpu_set_reserved_ttbr1 x1, x3 |
50e1881d | 195 | |
c812026c | 196 | offset_ttbr1 x0, x3 |
5ffdfaed | 197 | msr ttbr1_el1, x0 |
50e1881d MR |
198 | isb |
199 | ||
0fbeb318 | 200 | restore_daif x2 |
50e1881d MR |
201 | |
202 | ret | |
f4659254 | 203 | SYM_FUNC_END(idmap_cpu_replace_ttbr1) |
50e1881d MR |
204 | .popsection |
205 | ||
f992b4df | 206 | #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 |
439e70e2 | 207 | .pushsection ".idmap.text", "awx" |
f992b4df WD |
208 | |
209 | .macro __idmap_kpti_get_pgtable_ent, type | |
210 | dc cvac, cur_\()\type\()p // Ensure any existing dirty | |
211 | dmb sy // lines are written back before | |
212 | ldr \type, [cur_\()\type\()p] // loading the entry | |
2ce77f6d WD |
213 | tbz \type, #0, skip_\()\type // Skip invalid and |
214 | tbnz \type, #11, skip_\()\type // non-global entries | |
f992b4df WD |
215 | .endm |
216 | ||
217 | .macro __idmap_kpti_put_pgtable_ent_ng, type | |
218 | orr \type, \type, #PTE_NG // Same bit for blocks and pages | |
71c8fc0c WD |
219 | str \type, [cur_\()\type\()p] // Update the entry and ensure |
220 | dmb sy // that it is visible to all | |
221 | dc civac, cur_\()\type\()p // CPUs. | |
f992b4df WD |
222 | .endm |
223 | ||
224 | /* | |
225 | * void __kpti_install_ng_mappings(int cpu, int num_cpus, phys_addr_t swapper) | |
226 | * | |
227 | * Called exactly once from stop_machine context by each CPU found during boot. | |
228 | */ | |
229 | __idmap_kpti_flag: | |
230 | .long 1 | |
f4659254 | 231 | SYM_FUNC_START(idmap_kpti_install_ng_mappings) |
f992b4df WD |
232 | cpu .req w0 |
233 | num_cpus .req w1 | |
234 | swapper_pa .req x2 | |
235 | swapper_ttb .req x3 | |
236 | flag_ptr .req x4 | |
237 | cur_pgdp .req x5 | |
238 | end_pgdp .req x6 | |
239 | pgd .req x7 | |
240 | cur_pudp .req x8 | |
241 | end_pudp .req x9 | |
242 | pud .req x10 | |
243 | cur_pmdp .req x11 | |
244 | end_pmdp .req x12 | |
245 | pmd .req x13 | |
246 | cur_ptep .req x14 | |
247 | end_ptep .req x15 | |
248 | pte .req x16 | |
249 | ||
250 | mrs swapper_ttb, ttbr1_el1 | |
e842dfb5 | 251 | restore_ttbr1 swapper_ttb |
f992b4df WD |
252 | adr flag_ptr, __idmap_kpti_flag |
253 | ||
254 | cbnz cpu, __idmap_kpti_secondary | |
255 | ||
256 | /* We're the boot CPU. Wait for the others to catch up */ | |
257 | sevl | |
258 | 1: wfe | |
e3ec6582 ST |
259 | ldaxr w17, [flag_ptr] |
260 | eor w17, w17, num_cpus | |
261 | cbnz w17, 1b | |
f992b4df WD |
262 | |
263 | /* We need to walk swapper, so turn off the MMU. */ | |
264 | pre_disable_mmu_workaround | |
e3ec6582 ST |
265 | mrs x17, sctlr_el1 |
266 | bic x17, x17, #SCTLR_ELx_M | |
267 | msr sctlr_el1, x17 | |
f992b4df WD |
268 | isb |
269 | ||
270 | /* Everybody is enjoying the idmap, so we can rewrite swapper. */ | |
271 | /* PGD */ | |
272 | mov cur_pgdp, swapper_pa | |
273 | add end_pgdp, cur_pgdp, #(PTRS_PER_PGD * 8) | |
274 | do_pgd: __idmap_kpti_get_pgtable_ent pgd | |
275 | tbnz pgd, #1, walk_puds | |
f992b4df | 276 | next_pgd: |
2ce77f6d WD |
277 | __idmap_kpti_put_pgtable_ent_ng pgd |
278 | skip_pgd: | |
f992b4df WD |
279 | add cur_pgdp, cur_pgdp, #8 |
280 | cmp cur_pgdp, end_pgdp | |
281 | b.ne do_pgd | |
282 | ||
283 | /* Publish the updated tables and nuke all the TLBs */ | |
284 | dsb sy | |
285 | tlbi vmalle1is | |
286 | dsb ish | |
287 | isb | |
288 | ||
289 | /* We're done: fire up the MMU again */ | |
e3ec6582 ST |
290 | mrs x17, sctlr_el1 |
291 | orr x17, x17, #SCTLR_ELx_M | |
8cc8a324 | 292 | set_sctlr_el1 x17 |
f32c7a8e | 293 | |
f992b4df WD |
294 | /* Set the flag to zero to indicate that we're all done */ |
295 | str wzr, [flag_ptr] | |
296 | ret | |
297 | ||
298 | /* PUD */ | |
299 | walk_puds: | |
300 | .if CONFIG_PGTABLE_LEVELS > 3 | |
301 | pte_to_phys cur_pudp, pgd | |
302 | add end_pudp, cur_pudp, #(PTRS_PER_PUD * 8) | |
303 | do_pud: __idmap_kpti_get_pgtable_ent pud | |
304 | tbnz pud, #1, walk_pmds | |
f992b4df | 305 | next_pud: |
2ce77f6d WD |
306 | __idmap_kpti_put_pgtable_ent_ng pud |
307 | skip_pud: | |
f992b4df WD |
308 | add cur_pudp, cur_pudp, 8 |
309 | cmp cur_pudp, end_pudp | |
310 | b.ne do_pud | |
311 | b next_pgd | |
312 | .else /* CONFIG_PGTABLE_LEVELS <= 3 */ | |
313 | mov pud, pgd | |
314 | b walk_pmds | |
315 | next_pud: | |
316 | b next_pgd | |
317 | .endif | |
318 | ||
319 | /* PMD */ | |
320 | walk_pmds: | |
321 | .if CONFIG_PGTABLE_LEVELS > 2 | |
322 | pte_to_phys cur_pmdp, pud | |
323 | add end_pmdp, cur_pmdp, #(PTRS_PER_PMD * 8) | |
324 | do_pmd: __idmap_kpti_get_pgtable_ent pmd | |
325 | tbnz pmd, #1, walk_ptes | |
f992b4df | 326 | next_pmd: |
2ce77f6d WD |
327 | __idmap_kpti_put_pgtable_ent_ng pmd |
328 | skip_pmd: | |
f992b4df WD |
329 | add cur_pmdp, cur_pmdp, #8 |
330 | cmp cur_pmdp, end_pmdp | |
331 | b.ne do_pmd | |
332 | b next_pud | |
333 | .else /* CONFIG_PGTABLE_LEVELS <= 2 */ | |
334 | mov pmd, pud | |
335 | b walk_ptes | |
336 | next_pmd: | |
337 | b next_pud | |
338 | .endif | |
339 | ||
340 | /* PTE */ | |
341 | walk_ptes: | |
342 | pte_to_phys cur_ptep, pmd | |
343 | add end_ptep, cur_ptep, #(PTRS_PER_PTE * 8) | |
344 | do_pte: __idmap_kpti_get_pgtable_ent pte | |
345 | __idmap_kpti_put_pgtable_ent_ng pte | |
2ce77f6d | 346 | skip_pte: |
f992b4df WD |
347 | add cur_ptep, cur_ptep, #8 |
348 | cmp cur_ptep, end_ptep | |
349 | b.ne do_pte | |
350 | b next_pmd | |
351 | ||
e3ec6582 ST |
352 | .unreq cpu |
353 | .unreq num_cpus | |
354 | .unreq swapper_pa | |
355 | .unreq cur_pgdp | |
356 | .unreq end_pgdp | |
357 | .unreq pgd | |
358 | .unreq cur_pudp | |
359 | .unreq end_pudp | |
360 | .unreq pud | |
361 | .unreq cur_pmdp | |
362 | .unreq end_pmdp | |
363 | .unreq pmd | |
364 | .unreq cur_ptep | |
365 | .unreq end_ptep | |
366 | .unreq pte | |
367 | ||
f992b4df WD |
368 | /* Secondary CPUs end up here */ |
369 | __idmap_kpti_secondary: | |
370 | /* Uninstall swapper before surgery begins */ | |
e3ec6582 | 371 | __idmap_cpu_set_reserved_ttbr1 x16, x17 |
f992b4df WD |
372 | |
373 | /* Increment the flag to let the boot CPU we're ready */ | |
e3ec6582 ST |
374 | 1: ldxr w16, [flag_ptr] |
375 | add w16, w16, #1 | |
376 | stxr w17, w16, [flag_ptr] | |
f992b4df WD |
377 | cbnz w17, 1b |
378 | ||
379 | /* Wait for the boot CPU to finish messing around with swapper */ | |
380 | sevl | |
381 | 1: wfe | |
e3ec6582 ST |
382 | ldxr w16, [flag_ptr] |
383 | cbnz w16, 1b | |
f992b4df WD |
384 | |
385 | /* All done, act like nothing happened */ | |
e3ec6582 | 386 | offset_ttbr1 swapper_ttb, x16 |
f992b4df WD |
387 | msr ttbr1_el1, swapper_ttb |
388 | isb | |
389 | ret | |
390 | ||
f992b4df WD |
391 | .unreq swapper_ttb |
392 | .unreq flag_ptr | |
f4659254 | 393 | SYM_FUNC_END(idmap_kpti_install_ng_mappings) |
f992b4df WD |
394 | .popsection |
395 | #endif | |
396 | ||
9cce7a43 CM |
397 | /* |
398 | * __cpu_setup | |
399 | * | |
df355101 ADK |
400 | * Initialise the processor for turning the MMU on. |
401 | * | |
df355101 ADK |
402 | * Output: |
403 | * Return in x0 the value of the SCTLR_EL1 register. | |
9cce7a43 | 404 | */ |
439e70e2 | 405 | .pushsection ".idmap.text", "awx" |
f4659254 | 406 | SYM_FUNC_START(__cpu_setup) |
fa7aae8a WD |
407 | tlbi vmalle1 // Invalidate local TLB |
408 | dsb nsh | |
9cce7a43 | 409 | |
df355101 ADK |
410 | mov x1, #3 << 20 |
411 | msr cpacr_el1, x1 // Enable FP/ASIMD | |
412 | mov x1, #1 << 12 // Reset mdscr_el1 and disable | |
413 | msr mdscr_el1, x1 // access to the DCC from EL0 | |
2ce39ad1 WD |
414 | isb // Unmask debug exceptions now, |
415 | enable_dbg // since this is per-cpu | |
df355101 | 416 | reset_pmuserenr_el0 x1 // Disable PMU access from EL0 |
44ca0e00 | 417 | reset_amuserenr_el0 x1 // Disable AMU access from EL0 |
87a1f063 | 418 | |
9cce7a43 | 419 | /* |
5cd6fa6d MR |
420 | * Default values for VMSA control registers. These will be adjusted |
421 | * below depending on detected CPU features. | |
9cce7a43 | 422 | */ |
776e49af | 423 | mair .req x17 |
5cd6fa6d | 424 | tcr .req x16 |
776e49af | 425 | mov_q mair, MAIR_EL1_SET |
5cd6fa6d MR |
426 | mov_q tcr, TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \ |
427 | TCR_TG_FLAGS | TCR_KASLR_FLAGS | TCR_ASID16 | \ | |
428 | TCR_TBI0 | TCR_A1 | TCR_KASAN_SW_FLAGS | |
bfc62c59 | 429 | |
5cd6fa6d | 430 | #ifdef CONFIG_ARM64_MTE |
3b714d24 VF |
431 | /* |
432 | * Update MAIR_EL1, GCR_EL1 and TFSR*_EL1 if MTE is supported | |
433 | * (ID_AA64PFR1_EL1[11:8] > 1). | |
434 | */ | |
435 | mrs x10, ID_AA64PFR1_EL1 | |
436 | ubfx x10, x10, #ID_AA64PFR1_MTE_SHIFT, #4 | |
437 | cmp x10, #ID_AA64PFR1_MTE | |
438 | b.lt 1f | |
439 | ||
440 | /* Normal Tagged memory type at the corresponding MAIR index */ | |
441 | mov x10, #MAIR_ATTR_NORMAL_TAGGED | |
776e49af | 442 | bfi mair, x10, #(8 * MT_NORMAL_TAGGED), #8 |
3b714d24 VF |
443 | |
444 | /* initialize GCR_EL1: all non-zero tags excluded by default */ | |
445 | mov x10, #(SYS_GCR_EL1_RRND | SYS_GCR_EL1_EXCL_MASK) | |
446 | msr_s SYS_GCR_EL1, x10 | |
447 | ||
37a8024d PC |
448 | /* |
449 | * If GCR_EL1.RRND=1 is implemented the same way as RRND=0, then | |
450 | * RGSR_EL1.SEED must be non-zero for IRG to produce | |
451 | * pseudorandom numbers. As RGSR_EL1 is UNKNOWN out of reset, we | |
452 | * must initialize it. | |
453 | */ | |
454 | mrs x10, CNTVCT_EL0 | |
455 | ands x10, x10, #SYS_RGSR_EL1_SEED_MASK | |
456 | csinc x10, x10, xzr, ne | |
457 | lsl x10, x10, #SYS_RGSR_EL1_SEED_SHIFT | |
458 | msr_s SYS_RGSR_EL1, x10 | |
459 | ||
3b714d24 VF |
460 | /* clear any pending tag check faults in TFSR*_EL1 */ |
461 | msr_s SYS_TFSR_EL1, xzr | |
462 | msr_s SYS_TFSRE0_EL1, xzr | |
bfc62c59 VF |
463 | |
464 | /* set the TCR_EL1 bits */ | |
5cd6fa6d MR |
465 | mov_q x10, TCR_KASAN_HW_FLAGS |
466 | orr tcr, tcr, x10 | |
3b714d24 VF |
467 | 1: |
468 | #endif | |
5cd6fa6d | 469 | tcr_clear_errata_bits tcr, x9, x5 |
67e7fdfc | 470 | |
b6d00d47 | 471 | #ifdef CONFIG_ARM64_VA_BITS_52 |
2c624fe6 | 472 | ldr_l x9, vabits_actual |
67e7fdfc SC |
473 | sub x9, xzr, x9 |
474 | add x9, x9, #64 | |
5cd6fa6d | 475 | tcr_set_t1sz tcr, x9 |
67e7fdfc SC |
476 | #else |
477 | ldr_l x9, idmap_t0sz | |
478 | #endif | |
5cd6fa6d | 479 | tcr_set_t0sz tcr, x9 |
dd006da2 | 480 | |
87366d8c | 481 | /* |
787fd1d0 | 482 | * Set the IPS bits in TCR_EL1. |
87366d8c | 483 | */ |
5cd6fa6d | 484 | tcr_compute_pa_size tcr, #TCR_IPS_SHIFT, x5, x6 |
2f4b829c CM |
485 | #ifdef CONFIG_ARM64_HW_AFDBM |
486 | /* | |
05abb595 SP |
487 | * Enable hardware update of the Access Flags bit. |
488 | * Hardware dirty bit management is enabled later, | |
489 | * via capabilities. | |
2f4b829c CM |
490 | */ |
491 | mrs x9, ID_AA64MMFR1_EL1 | |
492 | and x9, x9, #0xf | |
05abb595 | 493 | cbz x9, 1f |
5cd6fa6d | 494 | orr tcr, tcr, #TCR_HA // hardware Access flag update |
05abb595 | 495 | 1: |
2f4b829c | 496 | #endif /* CONFIG_ARM64_HW_AFDBM */ |
776e49af | 497 | msr mair_el1, mair |
5cd6fa6d | 498 | msr tcr_el1, tcr |
df355101 ADK |
499 | /* |
500 | * Prepare SCTLR | |
501 | */ | |
2ffac9e3 | 502 | mov_q x0, INIT_SCTLR_EL1_MMU_ON |
9cce7a43 | 503 | ret // return to head.S |
776e49af MR |
504 | |
505 | .unreq mair | |
5cd6fa6d | 506 | .unreq tcr |
f4659254 | 507 | SYM_FUNC_END(__cpu_setup) |