1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2013-2017 ARM Limited, All Rights Reserved.
4 * Author: Marc Zyngier <marc.zyngier@arm.com>
7 #define pr_fmt(fmt) "GICv3: " fmt
9 #include <linux/acpi.h>
10 #include <linux/cpu.h>
11 #include <linux/cpu_pm.h>
12 #include <linux/delay.h>
13 #include <linux/interrupt.h>
14 #include <linux/irqdomain.h>
15 #include <linux/kstrtox.h>
17 #include <linux/of_address.h>
18 #include <linux/of_irq.h>
19 #include <linux/percpu.h>
20 #include <linux/refcount.h>
21 #include <linux/slab.h>
23 #include <linux/irqchip.h>
24 #include <linux/irqchip/arm-gic-common.h>
25 #include <linux/irqchip/arm-gic-v3.h>
26 #include <linux/irqchip/irq-partition-percpu.h>
27 #include <linux/bitfield.h>
28 #include <linux/bits.h>
29 #include <linux/arm-smccc.h>
31 #include <asm/cputype.h>
32 #include <asm/exception.h>
33 #include <asm/smp_plat.h>
36 #include "irq-gic-common.h"
38 #define GICD_INT_NMI_PRI (GICD_INT_DEF_PRI & ~0x80)
40 #define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0)
41 #define FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539 (1ULL << 1)
42 #define FLAGS_WORKAROUND_MTK_GICR_SAVE (1ULL << 2)
43 #define FLAGS_WORKAROUND_ASR_ERRATUM_8601001 (1ULL << 3)
45 #define GIC_IRQ_TYPE_PARTITION (GIC_IRQ_TYPE_LPI + 1)
47 struct redist_region {
48 void __iomem *redist_base;
49 phys_addr_t phys_base;
53 struct gic_chip_data {
54 struct fwnode_handle *fwnode;
55 phys_addr_t dist_phys_base;
56 void __iomem *dist_base;
57 struct redist_region *redist_regions;
59 struct irq_domain *domain;
61 u32 nr_redist_regions;
65 struct partition_desc **ppi_descs;
68 #define T241_CHIPS_MAX 4
69 static void __iomem *t241_dist_base_alias[T241_CHIPS_MAX] __read_mostly;
70 static DEFINE_STATIC_KEY_FALSE(gic_nvidia_t241_erratum);
72 static struct gic_chip_data gic_data __read_mostly;
73 static DEFINE_STATIC_KEY_TRUE(supports_deactivate_key);
75 #define GIC_ID_NR (1U << GICD_TYPER_ID_BITS(gic_data.rdists.gicd_typer))
76 #define GIC_LINE_NR min(GICD_TYPER_SPIS(gic_data.rdists.gicd_typer), 1020U)
77 #define GIC_ESPI_NR GICD_TYPER_ESPIS(gic_data.rdists.gicd_typer)
80 * The behaviours of RPR and PMR registers differ depending on the value of
81 * SCR_EL3.FIQ, and the behaviour of non-secure priority registers of the
82 * distributor and redistributors depends on whether security is enabled in the
85 * When security is enabled, non-secure priority values from the (re)distributor
86 * are presented to the GIC CPUIF as follow:
87 * (GIC_(R)DIST_PRI[irq] >> 1) | 0x80;
89 * If SCR_EL3.FIQ == 1, the values written to/read from PMR and RPR at non-secure
90 * EL1 are subject to a similar operation thus matching the priorities presented
91 * from the (re)distributor when security is enabled. When SCR_EL3.FIQ == 0,
92 * these values are unchanged by the GIC.
94 * see GICv3/GICv4 Architecture Specification (IHI0069D):
95 * - section 4.8.1 Non-secure accesses to register fields for Secure interrupt
97 * - Figure 4-7 Secure read of the priority field for a Non-secure Group 1
100 static DEFINE_STATIC_KEY_FALSE(supports_pseudo_nmis);
102 DEFINE_STATIC_KEY_FALSE(gic_nonsecure_priorities);
103 EXPORT_SYMBOL(gic_nonsecure_priorities);
106 * When the Non-secure world has access to group 0 interrupts (as a
107 * consequence of SCR_EL3.FIQ == 0), reading the ICC_RPR_EL1 register will
108 * return the Distributor's view of the interrupt priority.
110 * When GIC security is enabled (GICD_CTLR.DS == 0), the interrupt priority
111 * written by software is moved to the Non-secure range by the Distributor.
113 * If both are true (which is when gic_nonsecure_priorities gets enabled),
114 * we need to shift down the priority programmed by software to match it
115 * against the value returned by ICC_RPR_EL1.
117 #define GICD_INT_RPR_PRI(priority) \
119 u32 __priority = (priority); \
120 if (static_branch_unlikely(&gic_nonsecure_priorities)) \
121 __priority = 0x80 | (__priority >> 1); \
126 /* ppi_nmi_refs[n] == number of cpus having ppi[n + 16] set as NMI */
127 static refcount_t *ppi_nmi_refs;
129 static struct gic_kvm_info gic_v3_kvm_info __initdata;
130 static DEFINE_PER_CPU(bool, has_rss);
132 #define MPIDR_RS(mpidr) (((mpidr) & 0xF0UL) >> 4)
133 #define gic_data_rdist() (this_cpu_ptr(gic_data.rdists.rdist))
134 #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base)
135 #define gic_data_rdist_sgi_base() (gic_data_rdist_rd_base() + SZ_64K)
137 /* Our default, arbitrary priority value. Linux only uses one anyway. */
138 #define DEFAULT_PMR_VALUE 0xf0
140 enum gic_intid_range {
150 static enum gic_intid_range __get_intid_range(irq_hw_number_t hwirq)
159 case EPPI_BASE_INTID ... (EPPI_BASE_INTID + 63):
161 case ESPI_BASE_INTID ... (ESPI_BASE_INTID + 1023):
163 case 8192 ... GENMASK(23, 0):
166 return __INVALID_RANGE__;
170 static enum gic_intid_range get_intid_range(struct irq_data *d)
172 return __get_intid_range(d->hwirq);
175 static inline unsigned int gic_irq(struct irq_data *d)
180 static inline bool gic_irq_in_rdist(struct irq_data *d)
182 switch (get_intid_range(d)) {
192 static inline void __iomem *gic_dist_base_alias(struct irq_data *d)
194 if (static_branch_unlikely(&gic_nvidia_t241_erratum)) {
195 irq_hw_number_t hwirq = irqd_to_hwirq(d);
199 * For the erratum T241-FABRIC-4, read accesses to GICD_In{E}
200 * registers are directed to the chip that owns the SPI. The
201 * the alias region can also be used for writes to the
202 * GICD_In{E} except GICD_ICENABLERn. Each chip has support
203 * for 320 {E}SPIs. Mappings for all 4 chips:
209 switch (__get_intid_range(hwirq)) {
211 chip = (hwirq - 32) / 320;
219 return t241_dist_base_alias[chip];
222 return gic_data.dist_base;
225 static inline void __iomem *gic_dist_base(struct irq_data *d)
227 switch (get_intid_range(d)) {
231 /* SGI+PPI -> SGI_base for this CPU */
232 return gic_data_rdist_sgi_base();
236 /* SPI -> dist_base */
237 return gic_data.dist_base;
244 static void gic_do_wait_for_rwp(void __iomem *base, u32 bit)
246 u32 count = 1000000; /* 1s! */
248 while (readl_relaxed(base + GICD_CTLR) & bit) {
251 pr_err_ratelimited("RWP timeout, gone fishing\n");
259 /* Wait for completion of a distributor change */
260 static void gic_dist_wait_for_rwp(void)
262 gic_do_wait_for_rwp(gic_data.dist_base, GICD_CTLR_RWP);
265 /* Wait for completion of a redistributor change */
266 static void gic_redist_wait_for_rwp(void)
268 gic_do_wait_for_rwp(gic_data_rdist_rd_base(), GICR_CTLR_RWP);
273 static u64 __maybe_unused gic_read_iar(void)
275 if (cpus_have_const_cap(ARM64_WORKAROUND_CAVIUM_23154))
276 return gic_read_iar_cavium_thunderx();
278 return gic_read_iar_common();
282 static void gic_enable_redist(bool enable)
285 u32 count = 1000000; /* 1s! */
288 if (gic_data.flags & FLAGS_WORKAROUND_GICR_WAKER_MSM8996)
291 rbase = gic_data_rdist_rd_base();
293 val = readl_relaxed(rbase + GICR_WAKER);
295 /* Wake up this CPU redistributor */
296 val &= ~GICR_WAKER_ProcessorSleep;
298 val |= GICR_WAKER_ProcessorSleep;
299 writel_relaxed(val, rbase + GICR_WAKER);
301 if (!enable) { /* Check that GICR_WAKER is writeable */
302 val = readl_relaxed(rbase + GICR_WAKER);
303 if (!(val & GICR_WAKER_ProcessorSleep))
304 return; /* No PM support in this redistributor */
308 val = readl_relaxed(rbase + GICR_WAKER);
309 if (enable ^ (bool)(val & GICR_WAKER_ChildrenAsleep))
315 pr_err_ratelimited("redistributor failed to %s...\n",
316 enable ? "wakeup" : "sleep");
320 * Routines to disable, enable, EOI and route interrupts
322 static u32 convert_offset_index(struct irq_data *d, u32 offset, u32 *index)
324 switch (get_intid_range(d)) {
332 * Contrary to the ESPI range, the EPPI range is contiguous
333 * to the PPI range in the registers, so let's adjust the
334 * displacement accordingly. Consistency is overrated.
336 *index = d->hwirq - EPPI_BASE_INTID + 32;
339 *index = d->hwirq - ESPI_BASE_INTID;
342 return GICD_ISENABLERnE;
344 return GICD_ICENABLERnE;
346 return GICD_ISPENDRnE;
348 return GICD_ICPENDRnE;
350 return GICD_ISACTIVERnE;
352 return GICD_ICACTIVERnE;
353 case GICD_IPRIORITYR:
354 return GICD_IPRIORITYRnE;
358 return GICD_IROUTERnE;
372 static int gic_peek_irq(struct irq_data *d, u32 offset)
377 offset = convert_offset_index(d, offset, &index);
378 mask = 1 << (index % 32);
380 if (gic_irq_in_rdist(d))
381 base = gic_data_rdist_sgi_base();
383 base = gic_dist_base_alias(d);
385 return !!(readl_relaxed(base + offset + (index / 32) * 4) & mask);
388 static void gic_poke_irq(struct irq_data *d, u32 offset)
393 offset = convert_offset_index(d, offset, &index);
394 mask = 1 << (index % 32);
396 if (gic_irq_in_rdist(d))
397 base = gic_data_rdist_sgi_base();
399 base = gic_data.dist_base;
401 writel_relaxed(mask, base + offset + (index / 32) * 4);
404 static void gic_mask_irq(struct irq_data *d)
406 gic_poke_irq(d, GICD_ICENABLER);
407 if (gic_irq_in_rdist(d))
408 gic_redist_wait_for_rwp();
410 gic_dist_wait_for_rwp();
413 static void gic_eoimode1_mask_irq(struct irq_data *d)
417 * When masking a forwarded interrupt, make sure it is
418 * deactivated as well.
420 * This ensures that an interrupt that is getting
421 * disabled/masked will not get "stuck", because there is
422 * noone to deactivate it (guest is being terminated).
424 if (irqd_is_forwarded_to_vcpu(d))
425 gic_poke_irq(d, GICD_ICACTIVER);
428 static void gic_unmask_irq(struct irq_data *d)
430 gic_poke_irq(d, GICD_ISENABLER);
433 static inline bool gic_supports_nmi(void)
435 return IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI) &&
436 static_branch_likely(&supports_pseudo_nmis);
439 static int gic_irq_set_irqchip_state(struct irq_data *d,
440 enum irqchip_irq_state which, bool val)
444 if (d->hwirq >= 8192) /* SGI/PPI/SPI only */
448 case IRQCHIP_STATE_PENDING:
449 reg = val ? GICD_ISPENDR : GICD_ICPENDR;
452 case IRQCHIP_STATE_ACTIVE:
453 reg = val ? GICD_ISACTIVER : GICD_ICACTIVER;
456 case IRQCHIP_STATE_MASKED:
461 reg = GICD_ISENABLER;
468 gic_poke_irq(d, reg);
472 static int gic_irq_get_irqchip_state(struct irq_data *d,
473 enum irqchip_irq_state which, bool *val)
475 if (d->hwirq >= 8192) /* PPI/SPI only */
479 case IRQCHIP_STATE_PENDING:
480 *val = gic_peek_irq(d, GICD_ISPENDR);
483 case IRQCHIP_STATE_ACTIVE:
484 *val = gic_peek_irq(d, GICD_ISACTIVER);
487 case IRQCHIP_STATE_MASKED:
488 *val = !gic_peek_irq(d, GICD_ISENABLER);
498 static void gic_irq_set_prio(struct irq_data *d, u8 prio)
500 void __iomem *base = gic_dist_base(d);
503 offset = convert_offset_index(d, GICD_IPRIORITYR, &index);
505 writeb_relaxed(prio, base + offset + index);
508 static u32 __gic_get_ppi_index(irq_hw_number_t hwirq)
510 switch (__get_intid_range(hwirq)) {
514 return hwirq - EPPI_BASE_INTID + 16;
520 static u32 gic_get_ppi_index(struct irq_data *d)
522 return __gic_get_ppi_index(d->hwirq);
525 static int gic_irq_nmi_setup(struct irq_data *d)
527 struct irq_desc *desc = irq_to_desc(d->irq);
529 if (!gic_supports_nmi())
532 if (gic_peek_irq(d, GICD_ISENABLER)) {
533 pr_err("Cannot set NMI property of enabled IRQ %u\n", d->irq);
538 * A secondary irq_chip should be in charge of LPI request,
539 * it should not be possible to get there
541 if (WARN_ON(gic_irq(d) >= 8192))
544 /* desc lock should already be held */
545 if (gic_irq_in_rdist(d)) {
546 u32 idx = gic_get_ppi_index(d);
548 /* Setting up PPI as NMI, only switch handler for first NMI */
549 if (!refcount_inc_not_zero(&ppi_nmi_refs[idx])) {
550 refcount_set(&ppi_nmi_refs[idx], 1);
551 desc->handle_irq = handle_percpu_devid_fasteoi_nmi;
554 desc->handle_irq = handle_fasteoi_nmi;
557 gic_irq_set_prio(d, GICD_INT_NMI_PRI);
562 static void gic_irq_nmi_teardown(struct irq_data *d)
564 struct irq_desc *desc = irq_to_desc(d->irq);
566 if (WARN_ON(!gic_supports_nmi()))
569 if (gic_peek_irq(d, GICD_ISENABLER)) {
570 pr_err("Cannot set NMI property of enabled IRQ %u\n", d->irq);
575 * A secondary irq_chip should be in charge of LPI request,
576 * it should not be possible to get there
578 if (WARN_ON(gic_irq(d) >= 8192))
581 /* desc lock should already be held */
582 if (gic_irq_in_rdist(d)) {
583 u32 idx = gic_get_ppi_index(d);
585 /* Tearing down NMI, only switch handler for last NMI */
586 if (refcount_dec_and_test(&ppi_nmi_refs[idx]))
587 desc->handle_irq = handle_percpu_devid_irq;
589 desc->handle_irq = handle_fasteoi_irq;
592 gic_irq_set_prio(d, GICD_INT_DEF_PRI);
595 static void gic_eoi_irq(struct irq_data *d)
597 write_gicreg(gic_irq(d), ICC_EOIR1_EL1);
601 static void gic_eoimode1_eoi_irq(struct irq_data *d)
604 * No need to deactivate an LPI, or an interrupt that
605 * is is getting forwarded to a vcpu.
607 if (gic_irq(d) >= 8192 || irqd_is_forwarded_to_vcpu(d))
609 gic_write_dir(gic_irq(d));
612 static int gic_set_type(struct irq_data *d, unsigned int type)
614 enum gic_intid_range range;
615 unsigned int irq = gic_irq(d);
620 range = get_intid_range(d);
622 /* Interrupt configuration for SGIs can't be changed */
623 if (range == SGI_RANGE)
624 return type != IRQ_TYPE_EDGE_RISING ? -EINVAL : 0;
626 /* SPIs have restrictions on the supported types */
627 if ((range == SPI_RANGE || range == ESPI_RANGE) &&
628 type != IRQ_TYPE_LEVEL_HIGH && type != IRQ_TYPE_EDGE_RISING)
631 if (gic_irq_in_rdist(d))
632 base = gic_data_rdist_sgi_base();
634 base = gic_dist_base_alias(d);
636 offset = convert_offset_index(d, GICD_ICFGR, &index);
638 ret = gic_configure_irq(index, type, base + offset, NULL);
639 if (ret && (range == PPI_RANGE || range == EPPI_RANGE)) {
640 /* Misconfigured PPIs are usually not fatal */
641 pr_warn("GIC: PPI INTID%d is secure or misconfigured\n", irq);
648 static int gic_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu)
650 if (get_intid_range(d) == SGI_RANGE)
654 irqd_set_forwarded_to_vcpu(d);
656 irqd_clr_forwarded_to_vcpu(d);
660 static u64 gic_cpu_to_affinity(int cpu)
662 u64 mpidr = cpu_logical_map(cpu);
665 /* ASR8601 needs to have its affinities shifted down... */
666 if (unlikely(gic_data.flags & FLAGS_WORKAROUND_ASR_ERRATUM_8601001))
667 mpidr = (MPIDR_AFFINITY_LEVEL(mpidr, 1) |
668 (MPIDR_AFFINITY_LEVEL(mpidr, 2) << 8));
670 aff = ((u64)MPIDR_AFFINITY_LEVEL(mpidr, 3) << 32 |
671 MPIDR_AFFINITY_LEVEL(mpidr, 2) << 16 |
672 MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 |
673 MPIDR_AFFINITY_LEVEL(mpidr, 0));
678 static void gic_deactivate_unhandled(u32 irqnr)
680 if (static_branch_likely(&supports_deactivate_key)) {
682 gic_write_dir(irqnr);
684 write_gicreg(irqnr, ICC_EOIR1_EL1);
690 * Follow a read of the IAR with any HW maintenance that needs to happen prior
691 * to invoking the relevant IRQ handler. We must do two things:
693 * (1) Ensure instruction ordering between a read of IAR and subsequent
694 * instructions in the IRQ handler using an ISB.
696 * It is possible for the IAR to report an IRQ which was signalled *after*
697 * the CPU took an IRQ exception as multiple interrupts can race to be
698 * recognized by the GIC, earlier interrupts could be withdrawn, and/or
699 * later interrupts could be prioritized by the GIC.
701 * For devices which are tightly coupled to the CPU, such as PMUs, a
702 * context synchronization event is necessary to ensure that system
703 * register state is not stale, as these may have been indirectly written
704 * *after* exception entry.
706 * (2) Deactivate the interrupt when EOI mode 1 is in use.
708 static inline void gic_complete_ack(u32 irqnr)
710 if (static_branch_likely(&supports_deactivate_key))
711 write_gicreg(irqnr, ICC_EOIR1_EL1);
716 static bool gic_rpr_is_nmi_prio(void)
718 if (!gic_supports_nmi())
721 return unlikely(gic_read_rpr() == GICD_INT_RPR_PRI(GICD_INT_NMI_PRI));
724 static bool gic_irqnr_is_special(u32 irqnr)
726 return irqnr >= 1020 && irqnr <= 1023;
729 static void __gic_handle_irq(u32 irqnr, struct pt_regs *regs)
731 if (gic_irqnr_is_special(irqnr))
734 gic_complete_ack(irqnr);
736 if (generic_handle_domain_irq(gic_data.domain, irqnr)) {
737 WARN_ONCE(true, "Unexpected interrupt (irqnr %u)\n", irqnr);
738 gic_deactivate_unhandled(irqnr);
742 static void __gic_handle_nmi(u32 irqnr, struct pt_regs *regs)
744 if (gic_irqnr_is_special(irqnr))
747 gic_complete_ack(irqnr);
749 if (generic_handle_domain_nmi(gic_data.domain, irqnr)) {
750 WARN_ONCE(true, "Unexpected pseudo-NMI (irqnr %u)\n", irqnr);
751 gic_deactivate_unhandled(irqnr);
756 * An exception has been taken from a context with IRQs enabled, and this could
757 * be an IRQ or an NMI.
759 * The entry code called us with DAIF.IF set to keep NMIs masked. We must clear
760 * DAIF.IF (and update ICC_PMR_EL1 to mask regular IRQs) prior to returning,
761 * after handling any NMI but before handling any IRQ.
763 * The entry code has performed IRQ entry, and if an NMI is detected we must
764 * perform NMI entry/exit around invoking the handler.
766 static void __gic_handle_irq_from_irqson(struct pt_regs *regs)
771 irqnr = gic_read_iar();
773 is_nmi = gic_rpr_is_nmi_prio();
777 __gic_handle_nmi(irqnr, regs);
781 if (gic_prio_masking_enabled()) {
783 gic_arch_enable_irqs();
787 __gic_handle_irq(irqnr, regs);
791 * An exception has been taken from a context with IRQs disabled, which can only
794 * The entry code called us with DAIF.IF set to keep NMIs masked. We must leave
795 * DAIF.IF (and ICC_PMR_EL1) unchanged.
797 * The entry code has performed NMI entry.
799 static void __gic_handle_irq_from_irqsoff(struct pt_regs *regs)
805 * We were in a context with IRQs disabled. However, the
806 * entry code has set PMR to a value that allows any
807 * interrupt to be acknowledged, and not just NMIs. This can
808 * lead to surprising effects if the NMI has been retired in
809 * the meantime, and that there is an IRQ pending. The IRQ
810 * would then be taken in NMI context, something that nobody
811 * wants to debug twice.
813 * Until we sort this, drop PMR again to a level that will
814 * actually only allow NMIs before reading IAR, and then
815 * restore it to what it was.
817 pmr = gic_read_pmr();
820 irqnr = gic_read_iar();
823 __gic_handle_nmi(irqnr, regs);
826 static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
828 if (unlikely(gic_supports_nmi() && !interrupts_enabled(regs)))
829 __gic_handle_irq_from_irqsoff(regs);
831 __gic_handle_irq_from_irqson(regs);
834 static u32 gic_get_pribits(void)
838 pribits = gic_read_ctlr();
839 pribits &= ICC_CTLR_EL1_PRI_BITS_MASK;
840 pribits >>= ICC_CTLR_EL1_PRI_BITS_SHIFT;
846 static bool gic_has_group0(void)
851 old_pmr = gic_read_pmr();
854 * Let's find out if Group0 is under control of EL3 or not by
855 * setting the highest possible, non-zero priority in PMR.
857 * If SCR_EL3.FIQ is set, the priority gets shifted down in
858 * order for the CPU interface to set bit 7, and keep the
859 * actual priority in the non-secure range. In the process, it
860 * looses the least significant bit and the actual priority
861 * becomes 0x80. Reading it back returns 0, indicating that
862 * we're don't have access to Group0.
864 gic_write_pmr(BIT(8 - gic_get_pribits()));
865 val = gic_read_pmr();
867 gic_write_pmr(old_pmr);
872 static void __init gic_dist_init(void)
876 void __iomem *base = gic_data.dist_base;
879 /* Disable the distributor */
880 writel_relaxed(0, base + GICD_CTLR);
881 gic_dist_wait_for_rwp();
884 * Configure SPIs as non-secure Group-1. This will only matter
885 * if the GIC only has a single security state. This will not
886 * do the right thing if the kernel is running in secure mode,
887 * but that's not the intended use case anyway.
889 for (i = 32; i < GIC_LINE_NR; i += 32)
890 writel_relaxed(~0, base + GICD_IGROUPR + i / 8);
892 /* Extended SPI range, not handled by the GICv2/GICv3 common code */
893 for (i = 0; i < GIC_ESPI_NR; i += 32) {
894 writel_relaxed(~0U, base + GICD_ICENABLERnE + i / 8);
895 writel_relaxed(~0U, base + GICD_ICACTIVERnE + i / 8);
898 for (i = 0; i < GIC_ESPI_NR; i += 32)
899 writel_relaxed(~0U, base + GICD_IGROUPRnE + i / 8);
901 for (i = 0; i < GIC_ESPI_NR; i += 16)
902 writel_relaxed(0, base + GICD_ICFGRnE + i / 4);
904 for (i = 0; i < GIC_ESPI_NR; i += 4)
905 writel_relaxed(GICD_INT_DEF_PRI_X4, base + GICD_IPRIORITYRnE + i);
907 /* Now do the common stuff */
908 gic_dist_config(base, GIC_LINE_NR, NULL);
910 val = GICD_CTLR_ARE_NS | GICD_CTLR_ENABLE_G1A | GICD_CTLR_ENABLE_G1;
911 if (gic_data.rdists.gicd_typer2 & GICD_TYPER2_nASSGIcap) {
912 pr_info("Enabling SGIs without active state\n");
913 val |= GICD_CTLR_nASSGIreq;
916 /* Enable distributor with ARE, Group1, and wait for it to drain */
917 writel_relaxed(val, base + GICD_CTLR);
918 gic_dist_wait_for_rwp();
921 * Set all global interrupts to the boot CPU only. ARE must be
924 affinity = gic_cpu_to_affinity(smp_processor_id());
925 for (i = 32; i < GIC_LINE_NR; i++)
926 gic_write_irouter(affinity, base + GICD_IROUTER + i * 8);
928 for (i = 0; i < GIC_ESPI_NR; i++)
929 gic_write_irouter(affinity, base + GICD_IROUTERnE + i * 8);
932 static int gic_iterate_rdists(int (*fn)(struct redist_region *, void __iomem *))
937 for (i = 0; i < gic_data.nr_redist_regions; i++) {
938 void __iomem *ptr = gic_data.redist_regions[i].redist_base;
942 reg = readl_relaxed(ptr + GICR_PIDR2) & GIC_PIDR2_ARCH_MASK;
943 if (reg != GIC_PIDR2_ARCH_GICv3 &&
944 reg != GIC_PIDR2_ARCH_GICv4) { /* We're in trouble... */
945 pr_warn("No redistributor present @%p\n", ptr);
950 typer = gic_read_typer(ptr + GICR_TYPER);
951 ret = fn(gic_data.redist_regions + i, ptr);
955 if (gic_data.redist_regions[i].single_redist)
958 if (gic_data.redist_stride) {
959 ptr += gic_data.redist_stride;
961 ptr += SZ_64K * 2; /* Skip RD_base + SGI_base */
962 if (typer & GICR_TYPER_VLPIS)
963 ptr += SZ_64K * 2; /* Skip VLPI_base + reserved page */
965 } while (!(typer & GICR_TYPER_LAST));
968 return ret ? -ENODEV : 0;
971 static int __gic_populate_rdist(struct redist_region *region, void __iomem *ptr)
978 * Convert affinity to a 32bit value that can be matched to
979 * GICR_TYPER bits [63:32].
981 mpidr = gic_cpu_to_affinity(smp_processor_id());
983 aff = (MPIDR_AFFINITY_LEVEL(mpidr, 3) << 24 |
984 MPIDR_AFFINITY_LEVEL(mpidr, 2) << 16 |
985 MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 |
986 MPIDR_AFFINITY_LEVEL(mpidr, 0));
988 typer = gic_read_typer(ptr + GICR_TYPER);
989 if ((typer >> 32) == aff) {
990 u64 offset = ptr - region->redist_base;
991 raw_spin_lock_init(&gic_data_rdist()->rd_lock);
992 gic_data_rdist_rd_base() = ptr;
993 gic_data_rdist()->phys_base = region->phys_base + offset;
995 pr_info("CPU%d: found redistributor %lx region %d:%pa\n",
996 smp_processor_id(), mpidr,
997 (int)(region - gic_data.redist_regions),
998 &gic_data_rdist()->phys_base);
1006 static int gic_populate_rdist(void)
1008 if (gic_iterate_rdists(__gic_populate_rdist) == 0)
1011 /* We couldn't even deal with ourselves... */
1012 WARN(true, "CPU%d: mpidr %lx has no re-distributor!\n",
1014 (unsigned long)cpu_logical_map(smp_processor_id()));
1018 static int __gic_update_rdist_properties(struct redist_region *region,
1021 u64 typer = gic_read_typer(ptr + GICR_TYPER);
1022 u32 ctlr = readl_relaxed(ptr + GICR_CTLR);
1024 /* Boot-time cleanup */
1025 if ((typer & GICR_TYPER_VLPIS) && (typer & GICR_TYPER_RVPEID)) {
1028 /* Deactivate any present vPE */
1029 val = gicr_read_vpendbaser(ptr + SZ_128K + GICR_VPENDBASER);
1030 if (val & GICR_VPENDBASER_Valid)
1031 gicr_write_vpendbaser(GICR_VPENDBASER_PendingLast,
1032 ptr + SZ_128K + GICR_VPENDBASER);
1034 /* Mark the VPE table as invalid */
1035 val = gicr_read_vpropbaser(ptr + SZ_128K + GICR_VPROPBASER);
1036 val &= ~GICR_VPROPBASER_4_1_VALID;
1037 gicr_write_vpropbaser(val, ptr + SZ_128K + GICR_VPROPBASER);
1040 gic_data.rdists.has_vlpis &= !!(typer & GICR_TYPER_VLPIS);
1043 * TYPER.RVPEID implies some form of DirectLPI, no matter what the
1044 * doc says... :-/ And CTLR.IR implies another subset of DirectLPI
1045 * that the ITS driver can make use of for LPIs (and not VLPIs).
1047 * These are 3 different ways to express the same thing, depending
1048 * on the revision of the architecture and its relaxations over
1049 * time. Just group them under the 'direct_lpi' banner.
1051 gic_data.rdists.has_rvpeid &= !!(typer & GICR_TYPER_RVPEID);
1052 gic_data.rdists.has_direct_lpi &= (!!(typer & GICR_TYPER_DirectLPIS) |
1053 !!(ctlr & GICR_CTLR_IR) |
1054 gic_data.rdists.has_rvpeid);
1055 gic_data.rdists.has_vpend_valid_dirty &= !!(typer & GICR_TYPER_DIRTY);
1057 /* Detect non-sensical configurations */
1058 if (WARN_ON_ONCE(gic_data.rdists.has_rvpeid && !gic_data.rdists.has_vlpis)) {
1059 gic_data.rdists.has_direct_lpi = false;
1060 gic_data.rdists.has_vlpis = false;
1061 gic_data.rdists.has_rvpeid = false;
1064 gic_data.ppi_nr = min(GICR_TYPER_NR_PPIS(typer), gic_data.ppi_nr);
1069 static void gic_update_rdist_properties(void)
1071 gic_data.ppi_nr = UINT_MAX;
1072 gic_iterate_rdists(__gic_update_rdist_properties);
1073 if (WARN_ON(gic_data.ppi_nr == UINT_MAX))
1074 gic_data.ppi_nr = 0;
1075 pr_info("GICv3 features: %d PPIs%s%s\n",
1077 gic_data.has_rss ? ", RSS" : "",
1078 gic_data.rdists.has_direct_lpi ? ", DirectLPI" : "");
1080 if (gic_data.rdists.has_vlpis)
1081 pr_info("GICv4 features: %s%s%s\n",
1082 gic_data.rdists.has_direct_lpi ? "DirectLPI " : "",
1083 gic_data.rdists.has_rvpeid ? "RVPEID " : "",
1084 gic_data.rdists.has_vpend_valid_dirty ? "Valid+Dirty " : "");
1087 /* Check whether it's single security state view */
1088 static inline bool gic_dist_security_disabled(void)
1090 return readl_relaxed(gic_data.dist_base + GICD_CTLR) & GICD_CTLR_DS;
1093 static void gic_cpu_sys_reg_init(void)
1095 int i, cpu = smp_processor_id();
1096 u64 mpidr = gic_cpu_to_affinity(cpu);
1097 u64 need_rss = MPIDR_RS(mpidr);
1102 * Need to check that the SRE bit has actually been set. If
1103 * not, it means that SRE is disabled at EL2. We're going to
1104 * die painfully, and there is nothing we can do about it.
1106 * Kindly inform the luser.
1108 if (!gic_enable_sre())
1109 pr_err("GIC: unable to set SRE (disabled at EL2), panic ahead\n");
1111 pribits = gic_get_pribits();
1113 group0 = gic_has_group0();
1115 /* Set priority mask register */
1116 if (!gic_prio_masking_enabled()) {
1117 write_gicreg(DEFAULT_PMR_VALUE, ICC_PMR_EL1);
1118 } else if (gic_supports_nmi()) {
1120 * Mismatch configuration with boot CPU, the system is likely
1121 * to die as interrupt masking will not work properly on all
1124 * The boot CPU calls this function before enabling NMI support,
1125 * and as a result we'll never see this warning in the boot path
1128 if (static_branch_unlikely(&gic_nonsecure_priorities))
1129 WARN_ON(!group0 || gic_dist_security_disabled());
1131 WARN_ON(group0 && !gic_dist_security_disabled());
1135 * Some firmwares hand over to the kernel with the BPR changed from
1136 * its reset value (and with a value large enough to prevent
1137 * any pre-emptive interrupts from working at all). Writing a zero
1138 * to BPR restores is reset value.
1142 if (static_branch_likely(&supports_deactivate_key)) {
1143 /* EOI drops priority only (mode 1) */
1144 gic_write_ctlr(ICC_CTLR_EL1_EOImode_drop);
1146 /* EOI deactivates interrupt too (mode 0) */
1147 gic_write_ctlr(ICC_CTLR_EL1_EOImode_drop_dir);
1150 /* Always whack Group0 before Group1 */
1155 write_gicreg(0, ICC_AP0R3_EL1);
1156 write_gicreg(0, ICC_AP0R2_EL1);
1159 write_gicreg(0, ICC_AP0R1_EL1);
1163 write_gicreg(0, ICC_AP0R0_EL1);
1172 write_gicreg(0, ICC_AP1R3_EL1);
1173 write_gicreg(0, ICC_AP1R2_EL1);
1176 write_gicreg(0, ICC_AP1R1_EL1);
1180 write_gicreg(0, ICC_AP1R0_EL1);
1185 /* ... and let's hit the road... */
1186 gic_write_grpen1(1);
1188 /* Keep the RSS capability status in per_cpu variable */
1189 per_cpu(has_rss, cpu) = !!(gic_read_ctlr() & ICC_CTLR_EL1_RSS);
1191 /* Check all the CPUs have capable of sending SGIs to other CPUs */
1192 for_each_online_cpu(i) {
1193 bool have_rss = per_cpu(has_rss, i) && per_cpu(has_rss, cpu);
1195 need_rss |= MPIDR_RS(gic_cpu_to_affinity(i));
1196 if (need_rss && (!have_rss))
1197 pr_crit("CPU%d (%lx) can't SGI CPU%d (%lx), no RSS\n",
1198 cpu, (unsigned long)mpidr,
1199 i, (unsigned long)gic_cpu_to_affinity(i));
1203 * GIC spec says, when ICC_CTLR_EL1.RSS==1 and GICD_TYPER.RSS==0,
1204 * writing ICC_ASGI1R_EL1 register with RS != 0 is a CONSTRAINED
1205 * UNPREDICTABLE choice of :
1206 * - The write is ignored.
1207 * - The RS field is treated as 0.
1209 if (need_rss && (!gic_data.has_rss))
1210 pr_crit_once("RSS is required but GICD doesn't support it\n");
1213 static bool gicv3_nolpi;
1215 static int __init gicv3_nolpi_cfg(char *buf)
1217 return kstrtobool(buf, &gicv3_nolpi);
1219 early_param("irqchip.gicv3_nolpi", gicv3_nolpi_cfg);
1221 static int gic_dist_supports_lpis(void)
1223 return (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) &&
1224 !!(readl_relaxed(gic_data.dist_base + GICD_TYPER) & GICD_TYPER_LPIS) &&
1228 static void gic_cpu_init(void)
1230 void __iomem *rbase;
1233 /* Register ourselves with the rest of the world */
1234 if (gic_populate_rdist())
1237 gic_enable_redist(true);
1239 WARN((gic_data.ppi_nr > 16 || GIC_ESPI_NR != 0) &&
1240 !(gic_read_ctlr() & ICC_CTLR_EL1_ExtRange),
1241 "Distributor has extended ranges, but CPU%d doesn't\n",
1242 smp_processor_id());
1244 rbase = gic_data_rdist_sgi_base();
1246 /* Configure SGIs/PPIs as non-secure Group-1 */
1247 for (i = 0; i < gic_data.ppi_nr + 16; i += 32)
1248 writel_relaxed(~0, rbase + GICR_IGROUPR0 + i / 8);
1250 gic_cpu_config(rbase, gic_data.ppi_nr + 16, gic_redist_wait_for_rwp);
1252 /* initialise system registers */
1253 gic_cpu_sys_reg_init();
1258 #define MPIDR_TO_SGI_RS(mpidr) (MPIDR_RS(mpidr) << ICC_SGI1R_RS_SHIFT)
1259 #define MPIDR_TO_SGI_CLUSTER_ID(mpidr) ((mpidr) & ~0xFUL)
1261 static int gic_starting_cpu(unsigned int cpu)
1265 if (gic_dist_supports_lpis())
1271 static u16 gic_compute_target_list(int *base_cpu, const struct cpumask *mask,
1272 unsigned long cluster_id)
1274 int next_cpu, cpu = *base_cpu;
1275 unsigned long mpidr;
1278 mpidr = gic_cpu_to_affinity(cpu);
1280 while (cpu < nr_cpu_ids) {
1281 tlist |= 1 << (mpidr & 0xf);
1283 next_cpu = cpumask_next(cpu, mask);
1284 if (next_cpu >= nr_cpu_ids)
1288 mpidr = gic_cpu_to_affinity(cpu);
1290 if (cluster_id != MPIDR_TO_SGI_CLUSTER_ID(mpidr)) {
1300 #define MPIDR_TO_SGI_AFFINITY(cluster_id, level) \
1301 (MPIDR_AFFINITY_LEVEL(cluster_id, level) \
1302 << ICC_SGI1R_AFFINITY_## level ##_SHIFT)
1304 static void gic_send_sgi(u64 cluster_id, u16 tlist, unsigned int irq)
1308 val = (MPIDR_TO_SGI_AFFINITY(cluster_id, 3) |
1309 MPIDR_TO_SGI_AFFINITY(cluster_id, 2) |
1310 irq << ICC_SGI1R_SGI_ID_SHIFT |
1311 MPIDR_TO_SGI_AFFINITY(cluster_id, 1) |
1312 MPIDR_TO_SGI_RS(cluster_id) |
1313 tlist << ICC_SGI1R_TARGET_LIST_SHIFT);
1315 pr_devel("CPU%d: ICC_SGI1R_EL1 %llx\n", smp_processor_id(), val);
1316 gic_write_sgi1r(val);
1319 static void gic_ipi_send_mask(struct irq_data *d, const struct cpumask *mask)
1323 if (WARN_ON(d->hwirq >= 16))
1327 * Ensure that stores to Normal memory are visible to the
1328 * other CPUs before issuing the IPI.
1332 for_each_cpu(cpu, mask) {
1333 u64 cluster_id = MPIDR_TO_SGI_CLUSTER_ID(gic_cpu_to_affinity(cpu));
1336 tlist = gic_compute_target_list(&cpu, mask, cluster_id);
1337 gic_send_sgi(cluster_id, tlist, d->hwirq);
1340 /* Force the above writes to ICC_SGI1R_EL1 to be executed */
1344 static void __init gic_smp_init(void)
1346 struct irq_fwspec sgi_fwspec = {
1347 .fwnode = gic_data.fwnode,
1352 cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_GIC_STARTING,
1353 "irqchip/arm/gicv3:starting",
1354 gic_starting_cpu, NULL);
1356 /* Register all 8 non-secure SGIs */
1357 base_sgi = irq_domain_alloc_irqs(gic_data.domain, 8, NUMA_NO_NODE, &sgi_fwspec);
1358 if (WARN_ON(base_sgi <= 0))
1361 set_smp_ipi_range(base_sgi, 8);
1364 static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
1374 cpu = cpumask_first(mask_val);
1376 cpu = cpumask_any_and(mask_val, cpu_online_mask);
1378 if (cpu >= nr_cpu_ids)
1381 if (gic_irq_in_rdist(d))
1384 /* If interrupt was enabled, disable it first */
1385 enabled = gic_peek_irq(d, GICD_ISENABLER);
1389 offset = convert_offset_index(d, GICD_IROUTER, &index);
1390 reg = gic_dist_base(d) + offset + (index * 8);
1391 val = gic_cpu_to_affinity(cpu);
1393 gic_write_irouter(val, reg);
1396 * If the interrupt was enabled, enabled it again. Otherwise,
1397 * just wait for the distributor to have digested our changes.
1402 irq_data_update_effective_affinity(d, cpumask_of(cpu));
1404 return IRQ_SET_MASK_OK_DONE;
1407 #define gic_set_affinity NULL
1408 #define gic_ipi_send_mask NULL
1409 #define gic_smp_init() do { } while(0)
1412 static int gic_retrigger(struct irq_data *data)
1414 return !gic_irq_set_irqchip_state(data, IRQCHIP_STATE_PENDING, true);
1417 #ifdef CONFIG_CPU_PM
1418 static int gic_cpu_pm_notifier(struct notifier_block *self,
1419 unsigned long cmd, void *v)
1421 if (cmd == CPU_PM_EXIT) {
1422 if (gic_dist_security_disabled())
1423 gic_enable_redist(true);
1424 gic_cpu_sys_reg_init();
1425 } else if (cmd == CPU_PM_ENTER && gic_dist_security_disabled()) {
1426 gic_write_grpen1(0);
1427 gic_enable_redist(false);
1432 static struct notifier_block gic_cpu_pm_notifier_block = {
1433 .notifier_call = gic_cpu_pm_notifier,
1436 static void gic_cpu_pm_init(void)
1438 cpu_pm_register_notifier(&gic_cpu_pm_notifier_block);
1442 static inline void gic_cpu_pm_init(void) { }
1443 #endif /* CONFIG_CPU_PM */
1445 static struct irq_chip gic_chip = {
1447 .irq_mask = gic_mask_irq,
1448 .irq_unmask = gic_unmask_irq,
1449 .irq_eoi = gic_eoi_irq,
1450 .irq_set_type = gic_set_type,
1451 .irq_set_affinity = gic_set_affinity,
1452 .irq_retrigger = gic_retrigger,
1453 .irq_get_irqchip_state = gic_irq_get_irqchip_state,
1454 .irq_set_irqchip_state = gic_irq_set_irqchip_state,
1455 .irq_nmi_setup = gic_irq_nmi_setup,
1456 .irq_nmi_teardown = gic_irq_nmi_teardown,
1457 .ipi_send_mask = gic_ipi_send_mask,
1458 .flags = IRQCHIP_SET_TYPE_MASKED |
1459 IRQCHIP_SKIP_SET_WAKE |
1460 IRQCHIP_MASK_ON_SUSPEND,
1463 static struct irq_chip gic_eoimode1_chip = {
1465 .irq_mask = gic_eoimode1_mask_irq,
1466 .irq_unmask = gic_unmask_irq,
1467 .irq_eoi = gic_eoimode1_eoi_irq,
1468 .irq_set_type = gic_set_type,
1469 .irq_set_affinity = gic_set_affinity,
1470 .irq_retrigger = gic_retrigger,
1471 .irq_get_irqchip_state = gic_irq_get_irqchip_state,
1472 .irq_set_irqchip_state = gic_irq_set_irqchip_state,
1473 .irq_set_vcpu_affinity = gic_irq_set_vcpu_affinity,
1474 .irq_nmi_setup = gic_irq_nmi_setup,
1475 .irq_nmi_teardown = gic_irq_nmi_teardown,
1476 .ipi_send_mask = gic_ipi_send_mask,
1477 .flags = IRQCHIP_SET_TYPE_MASKED |
1478 IRQCHIP_SKIP_SET_WAKE |
1479 IRQCHIP_MASK_ON_SUSPEND,
1482 static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
1485 struct irq_chip *chip = &gic_chip;
1486 struct irq_data *irqd = irq_desc_get_irq_data(irq_to_desc(irq));
1488 if (static_branch_likely(&supports_deactivate_key))
1489 chip = &gic_eoimode1_chip;
1491 switch (__get_intid_range(hw)) {
1495 irq_set_percpu_devid(irq);
1496 irq_domain_set_info(d, irq, hw, chip, d->host_data,
1497 handle_percpu_devid_irq, NULL, NULL);
1502 irq_domain_set_info(d, irq, hw, chip, d->host_data,
1503 handle_fasteoi_irq, NULL, NULL);
1505 irqd_set_single_target(irqd);
1509 if (!gic_dist_supports_lpis())
1511 irq_domain_set_info(d, irq, hw, chip, d->host_data,
1512 handle_fasteoi_irq, NULL, NULL);
1519 /* Prevents SW retriggers which mess up the ACK/EOI ordering */
1520 irqd_set_handle_enforce_irqctx(irqd);
1524 static int gic_irq_domain_translate(struct irq_domain *d,
1525 struct irq_fwspec *fwspec,
1526 unsigned long *hwirq,
1529 if (fwspec->param_count == 1 && fwspec->param[0] < 16) {
1530 *hwirq = fwspec->param[0];
1531 *type = IRQ_TYPE_EDGE_RISING;
1535 if (is_of_node(fwspec->fwnode)) {
1536 if (fwspec->param_count < 3)
1539 switch (fwspec->param[0]) {
1541 *hwirq = fwspec->param[1] + 32;
1544 *hwirq = fwspec->param[1] + 16;
1547 *hwirq = fwspec->param[1] + ESPI_BASE_INTID;
1550 *hwirq = fwspec->param[1] + EPPI_BASE_INTID;
1552 case GIC_IRQ_TYPE_LPI: /* LPI */
1553 *hwirq = fwspec->param[1];
1555 case GIC_IRQ_TYPE_PARTITION:
1556 *hwirq = fwspec->param[1];
1557 if (fwspec->param[1] >= 16)
1558 *hwirq += EPPI_BASE_INTID - 16;
1566 *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK;
1569 * Make it clear that broken DTs are... broken.
1570 * Partitioned PPIs are an unfortunate exception.
1572 WARN_ON(*type == IRQ_TYPE_NONE &&
1573 fwspec->param[0] != GIC_IRQ_TYPE_PARTITION);
1577 if (is_fwnode_irqchip(fwspec->fwnode)) {
1578 if(fwspec->param_count != 2)
1581 if (fwspec->param[0] < 16) {
1582 pr_err(FW_BUG "Illegal GSI%d translation request\n",
1587 *hwirq = fwspec->param[0];
1588 *type = fwspec->param[1];
1590 WARN_ON(*type == IRQ_TYPE_NONE);
1597 static int gic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
1598 unsigned int nr_irqs, void *arg)
1601 irq_hw_number_t hwirq;
1602 unsigned int type = IRQ_TYPE_NONE;
1603 struct irq_fwspec *fwspec = arg;
1605 ret = gic_irq_domain_translate(domain, fwspec, &hwirq, &type);
1609 for (i = 0; i < nr_irqs; i++) {
1610 ret = gic_irq_domain_map(domain, virq + i, hwirq + i);
1618 static void gic_irq_domain_free(struct irq_domain *domain, unsigned int virq,
1619 unsigned int nr_irqs)
1623 for (i = 0; i < nr_irqs; i++) {
1624 struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
1625 irq_set_handler(virq + i, NULL);
1626 irq_domain_reset_irq_data(d);
1630 static bool fwspec_is_partitioned_ppi(struct irq_fwspec *fwspec,
1631 irq_hw_number_t hwirq)
1633 enum gic_intid_range range;
1635 if (!gic_data.ppi_descs)
1638 if (!is_of_node(fwspec->fwnode))
1641 if (fwspec->param_count < 4 || !fwspec->param[3])
1644 range = __get_intid_range(hwirq);
1645 if (range != PPI_RANGE && range != EPPI_RANGE)
1651 static int gic_irq_domain_select(struct irq_domain *d,
1652 struct irq_fwspec *fwspec,
1653 enum irq_domain_bus_token bus_token)
1655 unsigned int type, ret, ppi_idx;
1656 irq_hw_number_t hwirq;
1659 if (fwspec->fwnode != d->fwnode)
1662 /* If this is not DT, then we have a single domain */
1663 if (!is_of_node(fwspec->fwnode))
1666 ret = gic_irq_domain_translate(d, fwspec, &hwirq, &type);
1667 if (WARN_ON_ONCE(ret))
1670 if (!fwspec_is_partitioned_ppi(fwspec, hwirq))
1671 return d == gic_data.domain;
1674 * If this is a PPI and we have a 4th (non-null) parameter,
1675 * then we need to match the partition domain.
1677 ppi_idx = __gic_get_ppi_index(hwirq);
1678 return d == partition_get_domain(gic_data.ppi_descs[ppi_idx]);
1681 static const struct irq_domain_ops gic_irq_domain_ops = {
1682 .translate = gic_irq_domain_translate,
1683 .alloc = gic_irq_domain_alloc,
1684 .free = gic_irq_domain_free,
1685 .select = gic_irq_domain_select,
1688 static int partition_domain_translate(struct irq_domain *d,
1689 struct irq_fwspec *fwspec,
1690 unsigned long *hwirq,
1693 unsigned long ppi_intid;
1694 struct device_node *np;
1695 unsigned int ppi_idx;
1698 if (!gic_data.ppi_descs)
1701 np = of_find_node_by_phandle(fwspec->param[3]);
1705 ret = gic_irq_domain_translate(d, fwspec, &ppi_intid, type);
1706 if (WARN_ON_ONCE(ret))
1709 ppi_idx = __gic_get_ppi_index(ppi_intid);
1710 ret = partition_translate_id(gic_data.ppi_descs[ppi_idx],
1711 of_node_to_fwnode(np));
1716 *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK;
1721 static const struct irq_domain_ops partition_domain_ops = {
1722 .translate = partition_domain_translate,
1723 .select = gic_irq_domain_select,
1726 static bool gic_enable_quirk_msm8996(void *data)
1728 struct gic_chip_data *d = data;
1730 d->flags |= FLAGS_WORKAROUND_GICR_WAKER_MSM8996;
1735 static bool gic_enable_quirk_mtk_gicr(void *data)
1737 struct gic_chip_data *d = data;
1739 d->flags |= FLAGS_WORKAROUND_MTK_GICR_SAVE;
1744 static bool gic_enable_quirk_cavium_38539(void *data)
1746 struct gic_chip_data *d = data;
1748 d->flags |= FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539;
1753 static bool gic_enable_quirk_hip06_07(void *data)
1755 struct gic_chip_data *d = data;
1758 * HIP06 GICD_IIDR clashes with GIC-600 product number (despite
1759 * not being an actual ARM implementation). The saving grace is
1760 * that GIC-600 doesn't have ESPI, so nothing to do in that case.
1761 * HIP07 doesn't even have a proper IIDR, and still pretends to
1762 * have ESPI. In both cases, put them right.
1764 if (d->rdists.gicd_typer & GICD_TYPER_ESPI) {
1765 /* Zero both ESPI and the RES0 field next to it... */
1766 d->rdists.gicd_typer &= ~GENMASK(9, 8);
1773 #define T241_CHIPN_MASK GENMASK_ULL(45, 44)
1774 #define T241_CHIP_GICDA_OFFSET 0x1580000
1775 #define SMCCC_SOC_ID_T241 0x036b0241
1777 static bool gic_enable_quirk_nvidia_t241(void *data)
1779 s32 soc_id = arm_smccc_get_soc_id_version();
1780 unsigned long chip_bmask = 0;
1784 /* Check JEP106 code for NVIDIA T241 chip (036b:0241) */
1785 if ((soc_id < 0) || (soc_id != SMCCC_SOC_ID_T241))
1788 /* Find the chips based on GICR regions PHYS addr */
1789 for (i = 0; i < gic_data.nr_redist_regions; i++) {
1790 chip_bmask |= BIT(FIELD_GET(T241_CHIPN_MASK,
1791 (u64)gic_data.redist_regions[i].phys_base));
1794 if (hweight32(chip_bmask) < 3)
1797 /* Setup GICD alias regions */
1798 for (i = 0; i < ARRAY_SIZE(t241_dist_base_alias); i++) {
1799 if (chip_bmask & BIT(i)) {
1800 phys = gic_data.dist_phys_base + T241_CHIP_GICDA_OFFSET;
1801 phys |= FIELD_PREP(T241_CHIPN_MASK, i);
1802 t241_dist_base_alias[i] = ioremap(phys, SZ_64K);
1803 WARN_ON_ONCE(!t241_dist_base_alias[i]);
1806 static_branch_enable(&gic_nvidia_t241_erratum);
1810 static bool gic_enable_quirk_asr8601(void *data)
1812 struct gic_chip_data *d = data;
1814 d->flags |= FLAGS_WORKAROUND_ASR_ERRATUM_8601001;
1819 static const struct gic_quirk gic_quirks[] = {
1821 .desc = "GICv3: Qualcomm MSM8996 broken firmware",
1822 .compatible = "qcom,msm8996-gic-v3",
1823 .init = gic_enable_quirk_msm8996,
1826 .desc = "GICv3: ASR erratum 8601001",
1827 .compatible = "asr,asr8601-gic-v3",
1828 .init = gic_enable_quirk_asr8601,
1831 .desc = "GICv3: Mediatek Chromebook GICR save problem",
1832 .property = "mediatek,broken-save-restore-fw",
1833 .init = gic_enable_quirk_mtk_gicr,
1836 .desc = "GICv3: HIP06 erratum 161010803",
1839 .init = gic_enable_quirk_hip06_07,
1842 .desc = "GICv3: HIP07 erratum 161010803",
1845 .init = gic_enable_quirk_hip06_07,
1849 * Reserved register accesses generate a Synchronous
1850 * External Abort. This erratum applies to:
1851 * - ThunderX: CN88xx
1852 * - OCTEON TX: CN83xx, CN81xx
1853 * - OCTEON TX2: CN93xx, CN96xx, CN98xx, CNF95xx*
1855 .desc = "GICv3: Cavium erratum 38539",
1858 .init = gic_enable_quirk_cavium_38539,
1861 .desc = "GICv3: NVIDIA erratum T241-FABRIC-4",
1864 .init = gic_enable_quirk_nvidia_t241,
1870 static void gic_enable_nmi_support(void)
1874 if (!gic_prio_masking_enabled())
1877 if (gic_data.flags & FLAGS_WORKAROUND_MTK_GICR_SAVE) {
1878 pr_warn("Skipping NMI enable due to firmware issues\n");
1882 ppi_nmi_refs = kcalloc(gic_data.ppi_nr, sizeof(*ppi_nmi_refs), GFP_KERNEL);
1886 for (i = 0; i < gic_data.ppi_nr; i++)
1887 refcount_set(&ppi_nmi_refs[i], 0);
1889 pr_info("Pseudo-NMIs enabled using %s ICC_PMR_EL1 synchronisation\n",
1890 gic_has_relaxed_pmr_sync() ? "relaxed" : "forced");
1893 * How priority values are used by the GIC depends on two things:
1894 * the security state of the GIC (controlled by the GICD_CTRL.DS bit)
1895 * and if Group 0 interrupts can be delivered to Linux in the non-secure
1896 * world as FIQs (controlled by the SCR_EL3.FIQ bit). These affect the
1897 * ICC_PMR_EL1 register and the priority that software assigns to
1900 * GICD_CTRL.DS | SCR_EL3.FIQ | ICC_PMR_EL1 | Group 1 priority
1901 * -----------------------------------------------------------
1902 * 1 | - | unchanged | unchanged
1903 * -----------------------------------------------------------
1904 * 0 | 1 | non-secure | non-secure
1905 * -----------------------------------------------------------
1906 * 0 | 0 | unchanged | non-secure
1908 * where non-secure means that the value is right-shifted by one and the
1909 * MSB bit set, to make it fit in the non-secure priority range.
1911 * In the first two cases, where ICC_PMR_EL1 and the interrupt priority
1912 * are both either modified or unchanged, we can use the same set of
1915 * In the last case, where only the interrupt priorities are modified to
1916 * be in the non-secure range, we use a different PMR value to mask IRQs
1917 * and the rest of the values that we use remain unchanged.
1919 if (gic_has_group0() && !gic_dist_security_disabled())
1920 static_branch_enable(&gic_nonsecure_priorities);
1922 static_branch_enable(&supports_pseudo_nmis);
1924 if (static_branch_likely(&supports_deactivate_key))
1925 gic_eoimode1_chip.flags |= IRQCHIP_SUPPORTS_NMI;
1927 gic_chip.flags |= IRQCHIP_SUPPORTS_NMI;
1930 static int __init gic_init_bases(phys_addr_t dist_phys_base,
1931 void __iomem *dist_base,
1932 struct redist_region *rdist_regs,
1933 u32 nr_redist_regions,
1935 struct fwnode_handle *handle)
1940 if (!is_hyp_mode_available())
1941 static_branch_disable(&supports_deactivate_key);
1943 if (static_branch_likely(&supports_deactivate_key))
1944 pr_info("GIC: Using split EOI/Deactivate mode\n");
1946 gic_data.fwnode = handle;
1947 gic_data.dist_phys_base = dist_phys_base;
1948 gic_data.dist_base = dist_base;
1949 gic_data.redist_regions = rdist_regs;
1950 gic_data.nr_redist_regions = nr_redist_regions;
1951 gic_data.redist_stride = redist_stride;
1954 * Find out how many interrupts are supported.
1956 typer = readl_relaxed(gic_data.dist_base + GICD_TYPER);
1957 gic_data.rdists.gicd_typer = typer;
1959 gic_enable_quirks(readl_relaxed(gic_data.dist_base + GICD_IIDR),
1960 gic_quirks, &gic_data);
1962 pr_info("%d SPIs implemented\n", GIC_LINE_NR - 32);
1963 pr_info("%d Extended SPIs implemented\n", GIC_ESPI_NR);
1966 * ThunderX1 explodes on reading GICD_TYPER2, in violation of the
1967 * architecture spec (which says that reserved registers are RES0).
1969 if (!(gic_data.flags & FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539))
1970 gic_data.rdists.gicd_typer2 = readl_relaxed(gic_data.dist_base + GICD_TYPER2);
1972 gic_data.domain = irq_domain_create_tree(handle, &gic_irq_domain_ops,
1974 gic_data.rdists.rdist = alloc_percpu(typeof(*gic_data.rdists.rdist));
1975 if (!static_branch_unlikely(&gic_nvidia_t241_erratum)) {
1976 /* Disable GICv4.x features for the erratum T241-FABRIC-4 */
1977 gic_data.rdists.has_rvpeid = true;
1978 gic_data.rdists.has_vlpis = true;
1979 gic_data.rdists.has_direct_lpi = true;
1980 gic_data.rdists.has_vpend_valid_dirty = true;
1983 if (WARN_ON(!gic_data.domain) || WARN_ON(!gic_data.rdists.rdist)) {
1988 irq_domain_update_bus_token(gic_data.domain, DOMAIN_BUS_WIRED);
1990 gic_data.has_rss = !!(typer & GICD_TYPER_RSS);
1992 if (typer & GICD_TYPER_MBIS) {
1993 err = mbi_init(handle, gic_data.domain);
1995 pr_err("Failed to initialize MBIs\n");
1998 set_handle_irq(gic_handle_irq);
2000 gic_update_rdist_properties();
2007 if (gic_dist_supports_lpis()) {
2008 its_init(handle, &gic_data.rdists, gic_data.domain);
2010 its_lpi_memreserve_init();
2012 if (IS_ENABLED(CONFIG_ARM_GIC_V2M))
2013 gicv2m_init(handle, gic_data.domain);
2016 gic_enable_nmi_support();
2021 if (gic_data.domain)
2022 irq_domain_remove(gic_data.domain);
2023 free_percpu(gic_data.rdists.rdist);
2027 static int __init gic_validate_dist_version(void __iomem *dist_base)
2029 u32 reg = readl_relaxed(dist_base + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK;
2031 if (reg != GIC_PIDR2_ARCH_GICv3 && reg != GIC_PIDR2_ARCH_GICv4)
2037 /* Create all possible partitions at boot time */
2038 static void __init gic_populate_ppi_partitions(struct device_node *gic_node)
2040 struct device_node *parts_node, *child_part;
2041 int part_idx = 0, i;
2043 struct partition_affinity *parts;
2045 parts_node = of_get_child_by_name(gic_node, "ppi-partitions");
2049 gic_data.ppi_descs = kcalloc(gic_data.ppi_nr, sizeof(*gic_data.ppi_descs), GFP_KERNEL);
2050 if (!gic_data.ppi_descs)
2053 nr_parts = of_get_child_count(parts_node);
2058 parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
2059 if (WARN_ON(!parts))
2062 for_each_child_of_node(parts_node, child_part) {
2063 struct partition_affinity *part;
2066 part = &parts[part_idx];
2068 part->partition_id = of_node_to_fwnode(child_part);
2070 pr_info("GIC: PPI partition %pOFn[%d] { ",
2071 child_part, part_idx);
2073 n = of_property_count_elems_of_size(child_part, "affinity",
2077 for (i = 0; i < n; i++) {
2080 struct device_node *cpu_node;
2082 err = of_property_read_u32_index(child_part, "affinity",
2087 cpu_node = of_find_node_by_phandle(cpu_phandle);
2088 if (WARN_ON(!cpu_node))
2091 cpu = of_cpu_node_to_id(cpu_node);
2092 if (WARN_ON(cpu < 0)) {
2093 of_node_put(cpu_node);
2097 pr_cont("%pOF[%d] ", cpu_node, cpu);
2099 cpumask_set_cpu(cpu, &part->mask);
2100 of_node_put(cpu_node);
2107 for (i = 0; i < gic_data.ppi_nr; i++) {
2109 struct partition_desc *desc;
2110 struct irq_fwspec ppi_fwspec = {
2111 .fwnode = gic_data.fwnode,
2114 [0] = GIC_IRQ_TYPE_PARTITION,
2116 [2] = IRQ_TYPE_NONE,
2120 irq = irq_create_fwspec_mapping(&ppi_fwspec);
2123 desc = partition_create_desc(gic_data.fwnode, parts, nr_parts,
2124 irq, &partition_domain_ops);
2128 gic_data.ppi_descs[i] = desc;
2132 of_node_put(parts_node);
2135 static void __init gic_of_setup_kvm_info(struct device_node *node)
2141 gic_v3_kvm_info.type = GIC_V3;
2143 gic_v3_kvm_info.maint_irq = irq_of_parse_and_map(node, 0);
2144 if (!gic_v3_kvm_info.maint_irq)
2147 if (of_property_read_u32(node, "#redistributor-regions",
2151 gicv_idx += 3; /* Also skip GICD, GICC, GICH */
2152 ret = of_address_to_resource(node, gicv_idx, &r);
2154 gic_v3_kvm_info.vcpu = r;
2156 gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis;
2157 gic_v3_kvm_info.has_v4_1 = gic_data.rdists.has_rvpeid;
2158 vgic_set_kvm_info(&gic_v3_kvm_info);
2161 static void gic_request_region(resource_size_t base, resource_size_t size,
2164 if (!request_mem_region(base, size, name))
2165 pr_warn_once(FW_BUG "%s region %pa has overlapping address\n",
2169 static void __iomem *gic_of_iomap(struct device_node *node, int idx,
2170 const char *name, struct resource *res)
2175 ret = of_address_to_resource(node, idx, res);
2177 return IOMEM_ERR_PTR(ret);
2179 gic_request_region(res->start, resource_size(res), name);
2180 base = of_iomap(node, idx);
2182 return base ?: IOMEM_ERR_PTR(-ENOMEM);
2185 static int __init gic_of_init(struct device_node *node, struct device_node *parent)
2187 phys_addr_t dist_phys_base;
2188 void __iomem *dist_base;
2189 struct redist_region *rdist_regs;
2190 struct resource res;
2192 u32 nr_redist_regions;
2195 dist_base = gic_of_iomap(node, 0, "GICD", &res);
2196 if (IS_ERR(dist_base)) {
2197 pr_err("%pOF: unable to map gic dist registers\n", node);
2198 return PTR_ERR(dist_base);
2201 dist_phys_base = res.start;
2203 err = gic_validate_dist_version(dist_base);
2205 pr_err("%pOF: no distributor detected, giving up\n", node);
2206 goto out_unmap_dist;
2209 if (of_property_read_u32(node, "#redistributor-regions", &nr_redist_regions))
2210 nr_redist_regions = 1;
2212 rdist_regs = kcalloc(nr_redist_regions, sizeof(*rdist_regs),
2216 goto out_unmap_dist;
2219 for (i = 0; i < nr_redist_regions; i++) {
2220 rdist_regs[i].redist_base = gic_of_iomap(node, 1 + i, "GICR", &res);
2221 if (IS_ERR(rdist_regs[i].redist_base)) {
2222 pr_err("%pOF: couldn't map region %d\n", node, i);
2224 goto out_unmap_rdist;
2226 rdist_regs[i].phys_base = res.start;
2229 if (of_property_read_u64(node, "redistributor-stride", &redist_stride))
2232 gic_enable_of_quirks(node, gic_quirks, &gic_data);
2234 err = gic_init_bases(dist_phys_base, dist_base, rdist_regs,
2235 nr_redist_regions, redist_stride, &node->fwnode);
2237 goto out_unmap_rdist;
2239 gic_populate_ppi_partitions(node);
2241 if (static_branch_likely(&supports_deactivate_key))
2242 gic_of_setup_kvm_info(node);
2246 for (i = 0; i < nr_redist_regions; i++)
2247 if (rdist_regs[i].redist_base && !IS_ERR(rdist_regs[i].redist_base))
2248 iounmap(rdist_regs[i].redist_base);
2255 IRQCHIP_DECLARE(gic_v3, "arm,gic-v3", gic_of_init);
2260 void __iomem *dist_base;
2261 struct redist_region *redist_regs;
2262 u32 nr_redist_regions;
2267 phys_addr_t vcpu_base;
2268 } acpi_data __initdata;
2271 gic_acpi_register_redist(phys_addr_t phys_base, void __iomem *redist_base)
2273 static int count = 0;
2275 acpi_data.redist_regs[count].phys_base = phys_base;
2276 acpi_data.redist_regs[count].redist_base = redist_base;
2277 acpi_data.redist_regs[count].single_redist = acpi_data.single_redist;
2282 gic_acpi_parse_madt_redist(union acpi_subtable_headers *header,
2283 const unsigned long end)
2285 struct acpi_madt_generic_redistributor *redist =
2286 (struct acpi_madt_generic_redistributor *)header;
2287 void __iomem *redist_base;
2289 redist_base = ioremap(redist->base_address, redist->length);
2291 pr_err("Couldn't map GICR region @%llx\n", redist->base_address);
2294 gic_request_region(redist->base_address, redist->length, "GICR");
2296 gic_acpi_register_redist(redist->base_address, redist_base);
2301 gic_acpi_parse_madt_gicc(union acpi_subtable_headers *header,
2302 const unsigned long end)
2304 struct acpi_madt_generic_interrupt *gicc =
2305 (struct acpi_madt_generic_interrupt *)header;
2306 u32 reg = readl_relaxed(acpi_data.dist_base + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK;
2307 u32 size = reg == GIC_PIDR2_ARCH_GICv4 ? SZ_64K * 4 : SZ_64K * 2;
2308 void __iomem *redist_base;
2310 /* GICC entry which has !ACPI_MADT_ENABLED is not unusable so skip */
2311 if (!(gicc->flags & ACPI_MADT_ENABLED))
2314 redist_base = ioremap(gicc->gicr_base_address, size);
2317 gic_request_region(gicc->gicr_base_address, size, "GICR");
2319 gic_acpi_register_redist(gicc->gicr_base_address, redist_base);
2323 static int __init gic_acpi_collect_gicr_base(void)
2325 acpi_tbl_entry_handler redist_parser;
2326 enum acpi_madt_type type;
2328 if (acpi_data.single_redist) {
2329 type = ACPI_MADT_TYPE_GENERIC_INTERRUPT;
2330 redist_parser = gic_acpi_parse_madt_gicc;
2332 type = ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR;
2333 redist_parser = gic_acpi_parse_madt_redist;
2336 /* Collect redistributor base addresses in GICR entries */
2337 if (acpi_table_parse_madt(type, redist_parser, 0) > 0)
2340 pr_info("No valid GICR entries exist\n");
2344 static int __init gic_acpi_match_gicr(union acpi_subtable_headers *header,
2345 const unsigned long end)
2347 /* Subtable presence means that redist exists, that's it */
2351 static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header,
2352 const unsigned long end)
2354 struct acpi_madt_generic_interrupt *gicc =
2355 (struct acpi_madt_generic_interrupt *)header;
2358 * If GICC is enabled and has valid gicr base address, then it means
2359 * GICR base is presented via GICC
2361 if ((gicc->flags & ACPI_MADT_ENABLED) && gicc->gicr_base_address) {
2362 acpi_data.enabled_rdists++;
2367 * It's perfectly valid firmware can pass disabled GICC entry, driver
2368 * should not treat as errors, skip the entry instead of probe fail.
2370 if (!(gicc->flags & ACPI_MADT_ENABLED))
2376 static int __init gic_acpi_count_gicr_regions(void)
2381 * Count how many redistributor regions we have. It is not allowed
2382 * to mix redistributor description, GICR and GICC subtables have to be
2383 * mutually exclusive.
2385 count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR,
2386 gic_acpi_match_gicr, 0);
2388 acpi_data.single_redist = false;
2392 count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
2393 gic_acpi_match_gicc, 0);
2395 acpi_data.single_redist = true;
2396 count = acpi_data.enabled_rdists;
2402 static bool __init acpi_validate_gic_table(struct acpi_subtable_header *header,
2403 struct acpi_probe_entry *ape)
2405 struct acpi_madt_generic_distributor *dist;
2408 dist = (struct acpi_madt_generic_distributor *)header;
2409 if (dist->version != ape->driver_data)
2412 /* We need to do that exercise anyway, the sooner the better */
2413 count = gic_acpi_count_gicr_regions();
2417 acpi_data.nr_redist_regions = count;
2421 static int __init gic_acpi_parse_virt_madt_gicc(union acpi_subtable_headers *header,
2422 const unsigned long end)
2424 struct acpi_madt_generic_interrupt *gicc =
2425 (struct acpi_madt_generic_interrupt *)header;
2427 static int first_madt = true;
2429 /* Skip unusable CPUs */
2430 if (!(gicc->flags & ACPI_MADT_ENABLED))
2433 maint_irq_mode = (gicc->flags & ACPI_MADT_VGIC_IRQ_MODE) ?
2434 ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;
2439 acpi_data.maint_irq = gicc->vgic_interrupt;
2440 acpi_data.maint_irq_mode = maint_irq_mode;
2441 acpi_data.vcpu_base = gicc->gicv_base_address;
2447 * The maintenance interrupt and GICV should be the same for every CPU
2449 if ((acpi_data.maint_irq != gicc->vgic_interrupt) ||
2450 (acpi_data.maint_irq_mode != maint_irq_mode) ||
2451 (acpi_data.vcpu_base != gicc->gicv_base_address))
2457 static bool __init gic_acpi_collect_virt_info(void)
2461 count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
2462 gic_acpi_parse_virt_madt_gicc, 0);
2467 #define ACPI_GICV3_DIST_MEM_SIZE (SZ_64K)
2468 #define ACPI_GICV2_VCTRL_MEM_SIZE (SZ_4K)
2469 #define ACPI_GICV2_VCPU_MEM_SIZE (SZ_8K)
2471 static void __init gic_acpi_setup_kvm_info(void)
2475 if (!gic_acpi_collect_virt_info()) {
2476 pr_warn("Unable to get hardware information used for virtualization\n");
2480 gic_v3_kvm_info.type = GIC_V3;
2482 irq = acpi_register_gsi(NULL, acpi_data.maint_irq,
2483 acpi_data.maint_irq_mode,
2488 gic_v3_kvm_info.maint_irq = irq;
2490 if (acpi_data.vcpu_base) {
2491 struct resource *vcpu = &gic_v3_kvm_info.vcpu;
2493 vcpu->flags = IORESOURCE_MEM;
2494 vcpu->start = acpi_data.vcpu_base;
2495 vcpu->end = vcpu->start + ACPI_GICV2_VCPU_MEM_SIZE - 1;
2498 gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis;
2499 gic_v3_kvm_info.has_v4_1 = gic_data.rdists.has_rvpeid;
2500 vgic_set_kvm_info(&gic_v3_kvm_info);
2503 static struct fwnode_handle *gsi_domain_handle;
2505 static struct fwnode_handle *gic_v3_get_gsi_domain_id(u32 gsi)
2507 return gsi_domain_handle;
2511 gic_acpi_init(union acpi_subtable_headers *header, const unsigned long end)
2513 struct acpi_madt_generic_distributor *dist;
2517 /* Get distributor base address */
2518 dist = (struct acpi_madt_generic_distributor *)header;
2519 acpi_data.dist_base = ioremap(dist->base_address,
2520 ACPI_GICV3_DIST_MEM_SIZE);
2521 if (!acpi_data.dist_base) {
2522 pr_err("Unable to map GICD registers\n");
2525 gic_request_region(dist->base_address, ACPI_GICV3_DIST_MEM_SIZE, "GICD");
2527 err = gic_validate_dist_version(acpi_data.dist_base);
2529 pr_err("No distributor detected at @%p, giving up\n",
2530 acpi_data.dist_base);
2531 goto out_dist_unmap;
2534 size = sizeof(*acpi_data.redist_regs) * acpi_data.nr_redist_regions;
2535 acpi_data.redist_regs = kzalloc(size, GFP_KERNEL);
2536 if (!acpi_data.redist_regs) {
2538 goto out_dist_unmap;
2541 err = gic_acpi_collect_gicr_base();
2543 goto out_redist_unmap;
2545 gsi_domain_handle = irq_domain_alloc_fwnode(&dist->base_address);
2546 if (!gsi_domain_handle) {
2548 goto out_redist_unmap;
2551 err = gic_init_bases(dist->base_address, acpi_data.dist_base,
2552 acpi_data.redist_regs, acpi_data.nr_redist_regions,
2553 0, gsi_domain_handle);
2555 goto out_fwhandle_free;
2557 acpi_set_irq_model(ACPI_IRQ_MODEL_GIC, gic_v3_get_gsi_domain_id);
2559 if (static_branch_likely(&supports_deactivate_key))
2560 gic_acpi_setup_kvm_info();
2565 irq_domain_free_fwnode(gsi_domain_handle);
2567 for (i = 0; i < acpi_data.nr_redist_regions; i++)
2568 if (acpi_data.redist_regs[i].redist_base)
2569 iounmap(acpi_data.redist_regs[i].redist_base);
2570 kfree(acpi_data.redist_regs);
2572 iounmap(acpi_data.dist_base);
2575 IRQCHIP_ACPI_DECLARE(gic_v3, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
2576 acpi_validate_gic_table, ACPI_MADT_GIC_VERSION_V3,
2578 IRQCHIP_ACPI_DECLARE(gic_v4, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
2579 acpi_validate_gic_table, ACPI_MADT_GIC_VERSION_V4,
2581 IRQCHIP_ACPI_DECLARE(gic_v3_or_v4, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
2582 acpi_validate_gic_table, ACPI_MADT_GIC_VERSION_NONE,