1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * 64-bit pSeries and RS/6000 setup code.
5 * Copyright (C) 1995 Linus Torvalds
6 * Adapted from 'alpha' version by Gary Thomas
7 * Modified by Cort Dougan (cort@cs.nmt.edu)
8 * Modified by PPC64 Team, IBM Corp
12 * bootup setup stuff..
15 #include <linux/cpu.h>
16 #include <linux/errno.h>
17 #include <linux/sched.h>
18 #include <linux/kernel.h>
20 #include <linux/stddef.h>
21 #include <linux/unistd.h>
22 #include <linux/user.h>
23 #include <linux/tty.h>
24 #include <linux/major.h>
25 #include <linux/interrupt.h>
26 #include <linux/reboot.h>
27 #include <linux/init.h>
28 #include <linux/ioport.h>
29 #include <linux/console.h>
30 #include <linux/pci.h>
31 #include <linux/utsname.h>
32 #include <linux/adb.h>
33 #include <linux/export.h>
34 #include <linux/delay.h>
35 #include <linux/irq.h>
36 #include <linux/seq_file.h>
37 #include <linux/root_dev.h>
39 #include <linux/of_pci.h>
40 #include <linux/memblock.h>
41 #include <linux/swiotlb.h>
44 #include <asm/processor.h>
48 #include <asm/pci-bridge.h>
49 #include <asm/iommu.h>
51 #include <asm/machdep.h>
54 #include <asm/nvram.h>
58 #include <asm/ppc-pci.h>
59 #include <asm/i8259.h>
62 #include <asm/firmware.h>
65 #include <asm/plpar_wrappers.h>
66 #include <asm/kexec.h>
67 #include <asm/isa-bridge.h>
68 #include <asm/security_features.h>
69 #include <asm/asm-const.h>
71 #include <asm/swiotlb.h>
76 #include "../../../../drivers/pci/pci.h"
78 DEFINE_STATIC_KEY_FALSE(shared_processor
);
79 EXPORT_SYMBOL_GPL(shared_processor
);
83 unsigned long CMO_PageSize
= (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K
);
84 EXPORT_SYMBOL(CMO_PageSize
);
86 int fwnmi_active
; /* TRUE if an FWNMI handler is present */
87 int ibm_nmi_interlock_token
;
89 static void pSeries_show_cpuinfo(struct seq_file
*m
)
91 struct device_node
*root
;
92 const char *model
= "";
94 root
= of_find_node_by_path("/");
96 model
= of_get_property(root
, "model", NULL
);
97 seq_printf(m
, "machine\t\t: CHRP %s\n", model
);
100 seq_printf(m
, "MMU\t\t: Radix\n");
102 seq_printf(m
, "MMU\t\t: Hash\n");
105 /* Initialize firmware assisted non-maskable interrupts if
106 * the firmware supports this feature.
108 static void __init
fwnmi_init(void)
110 unsigned long system_reset_addr
, machine_check_addr
;
113 int nr_cpus
= num_possible_cpus();
114 #ifdef CONFIG_PPC_BOOK3S_64
115 struct slb_entry
*slb_ptr
;
118 int ibm_nmi_register_token
;
120 ibm_nmi_register_token
= rtas_token("ibm,nmi-register");
121 if (ibm_nmi_register_token
== RTAS_UNKNOWN_SERVICE
)
124 ibm_nmi_interlock_token
= rtas_token("ibm,nmi-interlock");
125 if (WARN_ON(ibm_nmi_interlock_token
== RTAS_UNKNOWN_SERVICE
))
128 /* If the kernel's not linked at zero we point the firmware at low
129 * addresses anyway, and use a trampoline to get to the real code. */
130 system_reset_addr
= __pa(system_reset_fwnmi
) - PHYSICAL_START
;
131 machine_check_addr
= __pa(machine_check_fwnmi
) - PHYSICAL_START
;
133 if (0 == rtas_call(ibm_nmi_register_token
, 2, 1, NULL
,
134 system_reset_addr
, machine_check_addr
))
138 * Allocate a chunk for per cpu buffer to hold rtas errorlog.
139 * It will be used in real mode mce handler, hence it needs to be
142 mce_data_buf
= memblock_alloc_try_nid_raw(RTAS_ERROR_LOG_MAX
* nr_cpus
,
143 RTAS_ERROR_LOG_MAX
, MEMBLOCK_LOW_LIMIT
,
144 ppc64_rma_size
, NUMA_NO_NODE
);
146 panic("Failed to allocate %d bytes below %pa for MCE buffer\n",
147 RTAS_ERROR_LOG_MAX
* nr_cpus
, &ppc64_rma_size
);
149 for_each_possible_cpu(i
) {
150 paca_ptrs
[i
]->mce_data_buf
= mce_data_buf
+
151 (RTAS_ERROR_LOG_MAX
* i
);
154 #ifdef CONFIG_PPC_BOOK3S_64
155 if (!radix_enabled()) {
156 /* Allocate per cpu area to save old slb contents during MCE */
157 size
= sizeof(struct slb_entry
) * mmu_slb_size
* nr_cpus
;
158 slb_ptr
= memblock_alloc_try_nid_raw(size
,
159 sizeof(struct slb_entry
), MEMBLOCK_LOW_LIMIT
,
160 ppc64_rma_size
, NUMA_NO_NODE
);
162 panic("Failed to allocate %zu bytes below %pa for slb area\n",
163 size
, &ppc64_rma_size
);
165 for_each_possible_cpu(i
)
166 paca_ptrs
[i
]->mce_faulty_slbs
= slb_ptr
+ (mmu_slb_size
* i
);
171 static void pseries_8259_cascade(struct irq_desc
*desc
)
173 struct irq_chip
*chip
= irq_desc_get_chip(desc
);
174 unsigned int cascade_irq
= i8259_irq();
177 generic_handle_irq(cascade_irq
);
179 chip
->irq_eoi(&desc
->irq_data
);
182 static void __init
pseries_setup_i8259_cascade(void)
184 struct device_node
*np
, *old
, *found
= NULL
;
185 unsigned int cascade
;
187 unsigned long intack
= 0;
190 for_each_node_by_type(np
, "interrupt-controller") {
191 if (of_device_is_compatible(np
, "chrp,iic")) {
198 printk(KERN_DEBUG
"pic: no ISA interrupt controller\n");
202 cascade
= irq_of_parse_and_map(found
, 0);
204 printk(KERN_ERR
"pic: failed to map cascade interrupt");
207 pr_debug("pic: cascade mapped to irq %d\n", cascade
);
209 for (old
= of_node_get(found
); old
!= NULL
; old
= np
) {
210 np
= of_get_parent(old
);
214 if (!of_node_name_eq(np
, "pci"))
216 addrp
= of_get_property(np
, "8259-interrupt-acknowledge", NULL
);
219 naddr
= of_n_addr_cells(np
);
220 intack
= addrp
[naddr
-1];
222 intack
|= ((unsigned long)addrp
[naddr
-2]) << 32;
225 printk(KERN_DEBUG
"pic: PCI 8259 intack at 0x%016lx\n", intack
);
226 i8259_init(found
, intack
);
228 irq_set_chained_handler(cascade
, pseries_8259_cascade
);
231 static void __init
pseries_init_irq(void)
233 /* Try using a XIVE if available, otherwise use a XICS */
234 if (!xive_spapr_init()) {
236 pseries_setup_i8259_cascade();
240 static void pseries_lpar_enable_pmcs(void)
242 unsigned long set
, reset
;
246 plpar_hcall_norets(H_PERFMON
, set
, reset
);
249 static int pci_dn_reconfig_notifier(struct notifier_block
*nb
, unsigned long action
, void *data
)
251 struct of_reconfig_data
*rd
= data
;
252 struct device_node
*parent
, *np
= rd
->dn
;
257 case OF_RECONFIG_ATTACH_NODE
:
258 parent
= of_get_parent(np
);
259 pdn
= parent
? PCI_DN(parent
) : NULL
;
261 pci_add_device_node_info(pdn
->phb
, np
);
265 case OF_RECONFIG_DETACH_NODE
:
268 list_del(&pdn
->list
);
277 static struct notifier_block pci_dn_reconfig_nb
= {
278 .notifier_call
= pci_dn_reconfig_notifier
,
281 struct kmem_cache
*dtl_cache
;
283 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
285 * Allocate space for the dispatch trace log for all possible cpus
286 * and register the buffers with the hypervisor. This is used for
287 * computing time stolen by the hypervisor.
289 static int alloc_dispatch_logs(void)
291 if (!firmware_has_feature(FW_FEATURE_SPLPAR
))
297 alloc_dtl_buffers(0);
299 /* Register the DTL for the current (boot) cpu */
300 register_dtl_buffer(smp_processor_id());
304 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
305 static inline int alloc_dispatch_logs(void)
309 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
311 static int alloc_dispatch_log_kmem_cache(void)
313 void (*ctor
)(void *) = get_dtl_cache_ctor();
315 dtl_cache
= kmem_cache_create("dtl", DISPATCH_LOG_BYTES
,
316 DISPATCH_LOG_BYTES
, 0, ctor
);
318 pr_warn("Failed to create dispatch trace log buffer cache\n");
319 pr_warn("Stolen time statistics will be unreliable\n");
323 return alloc_dispatch_logs();
325 machine_early_initcall(pseries
, alloc_dispatch_log_kmem_cache
);
327 DEFINE_PER_CPU(u64
, idle_spurr_cycles
);
328 DEFINE_PER_CPU(u64
, idle_entry_purr_snap
);
329 DEFINE_PER_CPU(u64
, idle_entry_spurr_snap
);
330 static void pseries_lpar_idle(void)
333 * Default handler to go into low thread priority and possibly
334 * low power mode by ceding processor to hypervisor
337 if (!prep_irq_for_idle())
340 /* Indicate to hypervisor that we are idle. */
341 pseries_idle_prolog();
344 * Yield the processor to the hypervisor. We return if
345 * an external interrupt occurs (which are driven prior
346 * to returning here) or if a prod occurs from another
347 * processor. When returning here, external interrupts
352 pseries_idle_epilog();
356 * Enable relocation on during exceptions. This has partition wide scope and
357 * may take a while to complete, if it takes longer than one second we will
358 * just give up rather than wasting any more time on this - if that turns out
359 * to ever be a problem in practice we can move this into a kernel thread to
360 * finish off the process later in boot.
362 bool pseries_enable_reloc_on_exc(void)
365 unsigned int delay
, total_delay
= 0;
368 rc
= enable_reloc_on_exceptions();
369 if (!H_IS_LONG_BUSY(rc
)) {
371 pr_info("Relocation on exceptions not"
374 } else if (rc
!= H_SUCCESS
) {
375 pr_warn("Unable to enable relocation"
376 " on exceptions: %ld\n", rc
);
382 delay
= get_longbusy_msecs(rc
);
383 total_delay
+= delay
;
384 if (total_delay
> 1000) {
385 pr_warn("Warning: Giving up waiting to enable "
386 "relocation on exceptions (%u msec)!\n",
394 EXPORT_SYMBOL(pseries_enable_reloc_on_exc
);
396 void pseries_disable_reloc_on_exc(void)
401 rc
= disable_reloc_on_exceptions();
402 if (!H_IS_LONG_BUSY(rc
))
404 mdelay(get_longbusy_msecs(rc
));
407 pr_warn("Warning: Failed to disable relocation on exceptions: %ld\n",
410 EXPORT_SYMBOL(pseries_disable_reloc_on_exc
);
412 #ifdef CONFIG_KEXEC_CORE
413 static void pSeries_machine_kexec(struct kimage
*image
)
415 if (firmware_has_feature(FW_FEATURE_SET_MODE
))
416 pseries_disable_reloc_on_exc();
418 default_machine_kexec(image
);
422 #ifdef __LITTLE_ENDIAN__
423 void pseries_big_endian_exceptions(void)
428 rc
= enable_big_endian_exceptions();
429 if (!H_IS_LONG_BUSY(rc
))
431 mdelay(get_longbusy_msecs(rc
));
435 * At this point it is unlikely panic() will get anything
436 * out to the user, since this is called very late in kexec
437 * but at least this will stop us from continuing on further
438 * and creating an even more difficult to debug situation.
440 * There is a known problem when kdump'ing, if cpus are offline
441 * the above call will fail. Rather than panicking again, keep
442 * going and hope the kdump kernel is also little endian, which
445 if (rc
&& !kdump_in_progress())
446 panic("Could not enable big endian exceptions");
449 void pseries_little_endian_exceptions(void)
454 rc
= enable_little_endian_exceptions();
455 if (!H_IS_LONG_BUSY(rc
))
457 mdelay(get_longbusy_msecs(rc
));
460 ppc_md
.progress("H_SET_MODE LE exception fail", 0);
461 panic("Could not enable little endian exceptions");
466 static void __init
pSeries_discover_phbs(void)
468 struct device_node
*node
;
469 struct pci_controller
*phb
;
470 struct device_node
*root
= of_find_node_by_path("/");
472 for_each_child_of_node(root
, node
) {
473 if (!of_node_is_type(node
, "pci") &&
474 !of_node_is_type(node
, "pciex"))
477 phb
= pcibios_alloc_controller(node
);
481 pci_process_bridge_OF_ranges(phb
, node
, 0);
482 isa_bridge_find_early(phb
);
483 phb
->controller_ops
= pseries_pci_controller_ops
;
485 /* create pci_dn's for DT nodes under this PHB */
486 pci_devs_phb_init_dynamic(phb
);
492 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties
495 of_pci_check_probe_only();
498 static void init_cpu_char_feature_flags(struct h_cpu_char_result
*result
)
501 * The features below are disabled by default, so we instead look to see
502 * if firmware has *enabled* them, and set them if so.
504 if (result
->character
& H_CPU_CHAR_SPEC_BAR_ORI31
)
505 security_ftr_set(SEC_FTR_SPEC_BAR_ORI31
);
507 if (result
->character
& H_CPU_CHAR_BCCTRL_SERIALISED
)
508 security_ftr_set(SEC_FTR_BCCTRL_SERIALISED
);
510 if (result
->character
& H_CPU_CHAR_L1D_FLUSH_ORI30
)
511 security_ftr_set(SEC_FTR_L1D_FLUSH_ORI30
);
513 if (result
->character
& H_CPU_CHAR_L1D_FLUSH_TRIG2
)
514 security_ftr_set(SEC_FTR_L1D_FLUSH_TRIG2
);
516 if (result
->character
& H_CPU_CHAR_L1D_THREAD_PRIV
)
517 security_ftr_set(SEC_FTR_L1D_THREAD_PRIV
);
519 if (result
->character
& H_CPU_CHAR_COUNT_CACHE_DISABLED
)
520 security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED
);
522 if (result
->character
& H_CPU_CHAR_BCCTR_FLUSH_ASSIST
)
523 security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST
);
525 if (result
->character
& H_CPU_CHAR_BCCTR_LINK_FLUSH_ASSIST
)
526 security_ftr_set(SEC_FTR_BCCTR_LINK_FLUSH_ASSIST
);
528 if (result
->behaviour
& H_CPU_BEHAV_FLUSH_COUNT_CACHE
)
529 security_ftr_set(SEC_FTR_FLUSH_COUNT_CACHE
);
531 if (result
->behaviour
& H_CPU_BEHAV_FLUSH_LINK_STACK
)
532 security_ftr_set(SEC_FTR_FLUSH_LINK_STACK
);
535 * The features below are enabled by default, so we instead look to see
536 * if firmware has *disabled* them, and clear them if so.
538 if (!(result
->behaviour
& H_CPU_BEHAV_FAVOUR_SECURITY
))
539 security_ftr_clear(SEC_FTR_FAVOUR_SECURITY
);
541 if (!(result
->behaviour
& H_CPU_BEHAV_L1D_FLUSH_PR
))
542 security_ftr_clear(SEC_FTR_L1D_FLUSH_PR
);
544 if (!(result
->behaviour
& H_CPU_BEHAV_BNDS_CHK_SPEC_BAR
))
545 security_ftr_clear(SEC_FTR_BNDS_CHK_SPEC_BAR
);
548 void pseries_setup_security_mitigations(void)
550 struct h_cpu_char_result result
;
551 enum l1d_flush_type types
;
556 * Set features to the defaults assumed by init_cpu_char_feature_flags()
557 * so it can set/clear again any features that might have changed after
558 * migration, and in case the hypercall fails and it is not even called.
560 powerpc_security_features
= SEC_FTR_DEFAULT
;
562 rc
= plpar_get_cpu_characteristics(&result
);
564 init_cpu_char_feature_flags(&result
);
567 * We're the guest so this doesn't apply to us, clear it to simplify
568 * handling of it elsewhere.
570 security_ftr_clear(SEC_FTR_L1D_FLUSH_HV
);
572 types
= L1D_FLUSH_FALLBACK
;
574 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_TRIG2
))
575 types
|= L1D_FLUSH_MTTRIG
;
577 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_ORI30
))
578 types
|= L1D_FLUSH_ORI
;
580 enable
= security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY
) && \
581 security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR
);
583 setup_rfi_flush(types
, enable
);
584 setup_count_cache_flush();
586 enable
= security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY
) &&
587 security_ftr_enabled(SEC_FTR_L1D_FLUSH_ENTRY
);
588 setup_entry_flush(enable
);
590 enable
= security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY
) &&
591 security_ftr_enabled(SEC_FTR_L1D_FLUSH_UACCESS
);
592 setup_uaccess_flush(enable
);
597 #ifdef CONFIG_PCI_IOV
598 enum rtas_iov_fw_value_map
{
599 NUM_RES_PROPERTY
= 0, /* Number of Resources */
600 LOW_INT
= 1, /* Lowest 32 bits of Address */
601 START_OF_ENTRIES
= 2, /* Always start of entry */
602 APERTURE_PROPERTY
= 2, /* Start of entry+ to Aperture Size */
603 WDW_SIZE_PROPERTY
= 4, /* Start of entry+ to Window Size */
604 NEXT_ENTRY
= 7 /* Go to next entry on array */
607 enum get_iov_fw_value_index
{
608 BAR_ADDRS
= 1, /* Get Bar Address */
609 APERTURE_SIZE
= 2, /* Get Aperture Size */
610 WDW_SIZE
= 3 /* Get Window Size */
613 static resource_size_t
pseries_get_iov_fw_value(struct pci_dev
*dev
, int resno
,
614 enum get_iov_fw_value_index value
)
617 struct device_node
*dn
= pci_device_to_OF_node(dev
);
618 int i
, num_res
, ret
= 0;
620 indexes
= of_get_property(dn
, "ibm,open-sriov-vf-bar-info", NULL
);
625 * First element in the array is the number of Bars
626 * returned. Search through the list to find the matching
629 num_res
= of_read_number(&indexes
[NUM_RES_PROPERTY
], 1);
630 if (resno
>= num_res
)
631 return 0; /* or an errror */
633 i
= START_OF_ENTRIES
+ NEXT_ENTRY
* resno
;
636 ret
= of_read_number(&indexes
[i
], 2);
639 ret
= of_read_number(&indexes
[i
+ APERTURE_PROPERTY
], 2);
642 ret
= of_read_number(&indexes
[i
+ WDW_SIZE_PROPERTY
], 2);
649 static void of_pci_set_vf_bar_size(struct pci_dev
*dev
, const int *indexes
)
651 struct resource
*res
;
652 resource_size_t base
, size
;
655 num_res
= of_read_number(&indexes
[NUM_RES_PROPERTY
], 1);
656 num_res
= min_t(int, num_res
, PCI_SRIOV_NUM_BARS
);
657 for (i
= START_OF_ENTRIES
, r
= 0; r
< num_res
&& r
< PCI_SRIOV_NUM_BARS
;
658 i
+= NEXT_ENTRY
, r
++) {
659 res
= &dev
->resource
[r
+ PCI_IOV_RESOURCES
];
660 base
= of_read_number(&indexes
[i
], 2);
661 size
= of_read_number(&indexes
[i
+ APERTURE_PROPERTY
], 2);
662 res
->flags
= pci_parse_of_flags(of_read_number
663 (&indexes
[i
+ LOW_INT
], 1), 0);
664 res
->flags
|= (IORESOURCE_MEM_64
| IORESOURCE_PCI_FIXED
);
665 res
->name
= pci_name(dev
);
667 res
->end
= base
+ size
- 1;
671 static void of_pci_parse_iov_addrs(struct pci_dev
*dev
, const int *indexes
)
673 struct resource
*res
, *root
, *conflict
;
674 resource_size_t base
, size
;
678 * First element in the array is the number of Bars
679 * returned. Search through the list to find the matching
680 * bars assign them from firmware into resources structure.
682 num_res
= of_read_number(&indexes
[NUM_RES_PROPERTY
], 1);
683 for (i
= START_OF_ENTRIES
, r
= 0; r
< num_res
&& r
< PCI_SRIOV_NUM_BARS
;
684 i
+= NEXT_ENTRY
, r
++) {
685 res
= &dev
->resource
[r
+ PCI_IOV_RESOURCES
];
686 base
= of_read_number(&indexes
[i
], 2);
687 size
= of_read_number(&indexes
[i
+ WDW_SIZE_PROPERTY
], 2);
688 res
->name
= pci_name(dev
);
690 res
->end
= base
+ size
- 1;
691 root
= &iomem_resource
;
693 "pSeries IOV BAR %d: trying firmware assignment %pR\n",
694 r
+ PCI_IOV_RESOURCES
, res
);
695 conflict
= request_resource_conflict(root
, res
);
698 "BAR %d: %pR conflicts with %s %pR\n",
699 r
+ PCI_IOV_RESOURCES
, res
,
700 conflict
->name
, conflict
);
701 res
->flags
|= IORESOURCE_UNSET
;
706 static void pseries_disable_sriov_resources(struct pci_dev
*pdev
)
710 pci_warn(pdev
, "No hypervisor support for SR-IOV on this device, IOV BARs disabled.\n");
711 for (i
= 0; i
< PCI_SRIOV_NUM_BARS
; i
++)
712 pdev
->resource
[i
+ PCI_IOV_RESOURCES
].flags
= 0;
715 static void pseries_pci_fixup_resources(struct pci_dev
*pdev
)
718 struct device_node
*dn
= pci_device_to_OF_node(pdev
);
720 /*Firmware must support open sriov otherwise dont configure*/
721 indexes
= of_get_property(dn
, "ibm,open-sriov-vf-bar-info", NULL
);
723 of_pci_set_vf_bar_size(pdev
, indexes
);
725 pseries_disable_sriov_resources(pdev
);
728 static void pseries_pci_fixup_iov_resources(struct pci_dev
*pdev
)
731 struct device_node
*dn
= pci_device_to_OF_node(pdev
);
733 if (!pdev
->is_physfn
|| pci_dev_is_added(pdev
))
735 /*Firmware must support open sriov otherwise dont configure*/
736 indexes
= of_get_property(dn
, "ibm,open-sriov-vf-bar-info", NULL
);
738 of_pci_parse_iov_addrs(pdev
, indexes
);
740 pseries_disable_sriov_resources(pdev
);
743 static resource_size_t
pseries_pci_iov_resource_alignment(struct pci_dev
*pdev
,
747 struct device_node
*dn
= pci_device_to_OF_node(pdev
);
749 /*Firmware must support open sriov otherwise report regular alignment*/
750 reg
= of_get_property(dn
, "ibm,is-open-sriov-pf", NULL
);
752 return pci_iov_resource_size(pdev
, resno
);
754 if (!pdev
->is_physfn
)
756 return pseries_get_iov_fw_value(pdev
,
757 resno
- PCI_IOV_RESOURCES
,
762 static void __init
pSeries_setup_arch(void)
764 set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT
);
766 /* Discover PIC type and setup ppc_md accordingly */
770 if (radix_enabled() && !mmu_has_feature(MMU_FTR_GTSE
))
771 if (!firmware_has_feature(FW_FEATURE_RPT_INVALIDATE
))
772 panic("BUG: Radix support requires either GTSE or RPT_INVALIDATE\n");
775 /* openpic global configuration register (64-bit format). */
776 /* openpic Interrupt Source Unit pointer (64-bit format). */
777 /* python0 facility area (mmio) (64-bit format) REAL address. */
779 /* init to some ~sane value until calibrate_delay() runs */
780 loops_per_jiffy
= 50000000;
784 pseries_setup_security_mitigations();
785 pseries_lpar_read_hblkrm_characteristics();
787 /* By default, only probe PCI (can be overridden by rtas_pci) */
788 pci_add_flags(PCI_PROBE_ONLY
);
790 /* Find and initialize PCI host bridges */
791 init_pci_config_tokens();
792 of_reconfig_notifier_register(&pci_dn_reconfig_nb
);
794 pSeries_nvram_init();
796 if (firmware_has_feature(FW_FEATURE_LPAR
)) {
797 vpa_init(boot_cpuid
);
799 if (lppaca_shared_proc(get_lppaca())) {
800 static_branch_enable(&shared_processor
);
804 ppc_md
.power_save
= pseries_lpar_idle
;
805 ppc_md
.enable_pmcs
= pseries_lpar_enable_pmcs
;
806 #ifdef CONFIG_PCI_IOV
807 ppc_md
.pcibios_fixup_resources
=
808 pseries_pci_fixup_resources
;
809 ppc_md
.pcibios_fixup_sriov
=
810 pseries_pci_fixup_iov_resources
;
811 ppc_md
.pcibios_iov_resource_alignment
=
812 pseries_pci_iov_resource_alignment
;
815 /* No special idle routine */
816 ppc_md
.enable_pmcs
= power4_enable_pmcs
;
819 ppc_md
.pcibios_root_bridge_prepare
= pseries_root_bridge_prepare
;
821 if (swiotlb_force
== SWIOTLB_FORCE
)
822 ppc_swiotlb_enable
= 1;
825 static void pseries_panic(char *str
)
827 panic_flush_kmsg_end();
831 static int __init
pSeries_init_panel(void)
833 /* Manually leave the kernel version on the panel. */
834 #ifdef __BIG_ENDIAN__
835 ppc_md
.progress("Linux ppc64\n", 0);
837 ppc_md
.progress("Linux ppc64le\n", 0);
839 ppc_md
.progress(init_utsname()->version
, 0);
843 machine_arch_initcall(pseries
, pSeries_init_panel
);
845 static int pseries_set_dabr(unsigned long dabr
, unsigned long dabrx
)
847 return plpar_hcall_norets(H_SET_DABR
, dabr
);
850 static int pseries_set_xdabr(unsigned long dabr
, unsigned long dabrx
)
852 /* Have to set at least one bit in the DABRX according to PAPR */
853 if (dabrx
== 0 && dabr
== 0)
855 /* PAPR says we can only set kernel and user bits */
856 dabrx
&= DABRX_KERNEL
| DABRX_USER
;
858 return plpar_hcall_norets(H_SET_XDABR
, dabr
, dabrx
);
861 static int pseries_set_dawr(int nr
, unsigned long dawr
, unsigned long dawrx
)
863 /* PAPR says we can't set HYP */
867 return plpar_set_watchpoint0(dawr
, dawrx
);
869 return plpar_set_watchpoint1(dawr
, dawrx
);
872 #define CMO_CHARACTERISTICS_TOKEN 44
873 #define CMO_MAXLENGTH 1026
875 void pSeries_coalesce_init(void)
877 struct hvcall_mpp_x_data mpp_x_data
;
879 if (firmware_has_feature(FW_FEATURE_CMO
) && !h_get_mpp_x(&mpp_x_data
))
880 powerpc_firmware_features
|= FW_FEATURE_XCMO
;
882 powerpc_firmware_features
&= ~FW_FEATURE_XCMO
;
886 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
887 * handle that here. (Stolen from parse_system_parameter_string)
889 static void pSeries_cmo_feature_init(void)
891 char *ptr
, *key
, *value
, *end
;
893 int page_order
= IOMMU_PAGE_SHIFT_4K
;
895 pr_debug(" -> fw_cmo_feature_init()\n");
896 spin_lock(&rtas_data_buf_lock
);
897 memset(rtas_data_buf
, 0, RTAS_DATA_BUF_SIZE
);
898 call_status
= rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
900 CMO_CHARACTERISTICS_TOKEN
,
904 if (call_status
!= 0) {
905 spin_unlock(&rtas_data_buf_lock
);
906 pr_debug("CMO not available\n");
907 pr_debug(" <- fw_cmo_feature_init()\n");
911 end
= rtas_data_buf
+ CMO_MAXLENGTH
- 2;
912 ptr
= rtas_data_buf
+ 2; /* step over strlen value */
915 while (*ptr
&& (ptr
<= end
)) {
916 /* Separate the key and value by replacing '=' with '\0' and
917 * point the value at the string after the '='
922 } else if (ptr
[0] == '\0' || ptr
[0] == ',') {
923 /* Terminate the string containing the key/value pair */
927 pr_debug("Malformed key/value pair\n");
928 /* Never found a '=', end processing */
932 if (0 == strcmp(key
, "CMOPageSize"))
933 page_order
= simple_strtol(value
, NULL
, 10);
934 else if (0 == strcmp(key
, "PrPSP"))
935 CMO_PrPSP
= simple_strtol(value
, NULL
, 10);
936 else if (0 == strcmp(key
, "SecPSP"))
937 CMO_SecPSP
= simple_strtol(value
, NULL
, 10);
938 value
= key
= ptr
+ 1;
943 /* Page size is returned as the power of 2 of the page size,
944 * convert to the page size in bytes before returning
946 CMO_PageSize
= 1 << page_order
;
947 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize
);
949 if (CMO_PrPSP
!= -1 || CMO_SecPSP
!= -1) {
950 pr_info("CMO enabled\n");
951 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP
,
953 powerpc_firmware_features
|= FW_FEATURE_CMO
;
954 pSeries_coalesce_init();
956 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP
,
958 spin_unlock(&rtas_data_buf_lock
);
959 pr_debug(" <- fw_cmo_feature_init()\n");
963 * Early initialization. Relocation is on but do not reference unbolted pages
965 static void __init
pseries_init(void)
967 pr_debug(" -> pseries_init()\n");
969 #ifdef CONFIG_HVC_CONSOLE
970 if (firmware_has_feature(FW_FEATURE_LPAR
))
971 hvc_vio_init_early();
973 if (firmware_has_feature(FW_FEATURE_XDABR
))
974 ppc_md
.set_dabr
= pseries_set_xdabr
;
975 else if (firmware_has_feature(FW_FEATURE_DABR
))
976 ppc_md
.set_dabr
= pseries_set_dabr
;
978 if (firmware_has_feature(FW_FEATURE_SET_MODE
))
979 ppc_md
.set_dawr
= pseries_set_dawr
;
981 pSeries_cmo_feature_init();
982 iommu_init_early_pSeries();
984 pr_debug(" <- pseries_init()\n");
988 * pseries_power_off - tell firmware about how to power off the system.
990 * This function calls either the power-off rtas token in normal cases
991 * or the ibm,power-off-ups token (if present & requested) in case of
992 * a power failure. If power-off token is used, power on will only be
993 * possible with power button press. If ibm,power-off-ups token is used
994 * it will allow auto poweron after power is restored.
996 static void pseries_power_off(void)
999 int rtas_poweroff_ups_token
= rtas_token("ibm,power-off-ups");
1001 if (rtas_flash_term_hook
)
1002 rtas_flash_term_hook(SYS_POWER_OFF
);
1004 if (rtas_poweron_auto
== 0 ||
1005 rtas_poweroff_ups_token
== RTAS_UNKNOWN_SERVICE
) {
1006 rc
= rtas_call(rtas_token("power-off"), 2, 1, NULL
, -1, -1);
1007 printk(KERN_INFO
"RTAS power-off returned %d\n", rc
);
1009 rc
= rtas_call(rtas_poweroff_ups_token
, 0, 1, NULL
);
1010 printk(KERN_INFO
"RTAS ibm,power-off-ups returned %d\n", rc
);
1015 static int __init
pSeries_probe(void)
1017 if (!of_node_is_type(of_root
, "chrp"))
1020 /* Cell blades firmware claims to be chrp while it's not. Until this
1021 * is fixed, we need to avoid those here.
1023 if (of_machine_is_compatible("IBM,CPBW-1.0") ||
1024 of_machine_is_compatible("IBM,CBEA"))
1027 pm_power_off
= pseries_power_off
;
1029 pr_debug("Machine is%s LPAR !\n",
1030 (powerpc_firmware_features
& FW_FEATURE_LPAR
) ? "" : " not");
1037 static int pSeries_pci_probe_mode(struct pci_bus
*bus
)
1039 if (firmware_has_feature(FW_FEATURE_LPAR
))
1040 return PCI_PROBE_DEVTREE
;
1041 return PCI_PROBE_NORMAL
;
1044 struct pci_controller_ops pseries_pci_controller_ops
= {
1045 .probe_mode
= pSeries_pci_probe_mode
,
1048 define_machine(pseries
) {
1050 .probe
= pSeries_probe
,
1051 .setup_arch
= pSeries_setup_arch
,
1052 .init_IRQ
= pseries_init_irq
,
1053 .show_cpuinfo
= pSeries_show_cpuinfo
,
1054 .log_error
= pSeries_log_error
,
1055 .discover_phbs
= pSeries_discover_phbs
,
1056 .pcibios_fixup
= pSeries_final_fixup
,
1057 .restart
= rtas_restart
,
1059 .panic
= pseries_panic
,
1060 .get_boot_time
= rtas_get_boot_time
,
1061 .get_rtc_time
= rtas_get_rtc_time
,
1062 .set_rtc_time
= rtas_set_rtc_time
,
1063 .calibrate_decr
= generic_calibrate_decr
,
1064 .progress
= rtas_progress
,
1065 .system_reset_exception
= pSeries_system_reset_exception
,
1066 .machine_check_early
= pseries_machine_check_realmode
,
1067 .machine_check_exception
= pSeries_machine_check_exception
,
1068 #ifdef CONFIG_KEXEC_CORE
1069 .machine_kexec
= pSeries_machine_kexec
,
1070 .kexec_cpu_down
= pseries_kexec_cpu_down
,
1072 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
1073 .memory_block_size
= pseries_memory_block_size
,