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Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001// SPDX-License-Identifier: GPL-2.0-only
Russell Kingf27ecac2005-08-18 21:31:00 +01002/*
Russell Kingf27ecac2005-08-18 21:31:00 +01003 * Copyright (C) 2002 ARM Limited, All Rights Reserved.
4 *
Russell Kingf27ecac2005-08-18 21:31:00 +01005 * Interrupt architecture for the GIC:
6 *
7 * o There is one Interrupt Distributor, which receives interrupts
8 * from system devices and sends them to the Interrupt Controllers.
9 *
10 * o There is one CPU Interface per CPU, which sends interrupts sent
11 * by the Distributor, and interrupts generated locally, to the
Catalin Marinasb3a1bde2007-02-14 19:14:56 +010012 * associated CPU. The base address of the CPU interface is usually
13 * aliased so that the same address points to different chips depending
14 * on the CPU it is accessed from.
Russell Kingf27ecac2005-08-18 21:31:00 +010015 *
16 * Note that IRQs 0-31 are special - they are local to each CPU.
17 * As such, the enable set/clear, pending set/clear and active bit
18 * registers are banked per-cpu for these sources.
19 */
20#include <linux/init.h>
21#include <linux/kernel.h>
Christophe JAILLET5e279732022-11-01 22:13:51 +010022#include <linux/kstrtox.h>
Rob Herringf37a53c2011-10-21 17:14:27 -050023#include <linux/err.h>
Arnd Bergmann7e1efcf2011-11-01 00:28:37 +010024#include <linux/module.h>
Russell Kingf27ecac2005-08-18 21:31:00 +010025#include <linux/list.h>
26#include <linux/smp.h>
Catalin Marinasc0114702013-01-14 18:05:37 +000027#include <linux/cpu.h>
Colin Cross254056f2011-02-10 12:54:10 -080028#include <linux/cpu_pm.h>
Catalin Marinasdcb86e82005-08-31 21:45:14 +010029#include <linux/cpumask.h>
Russell Kingfced80c2008-09-06 12:10:45 +010030#include <linux/io.h>
Rob Herringb3f7ed02011-09-28 21:27:52 -050031#include <linux/of.h>
32#include <linux/of_address.h>
33#include <linux/of_irq.h>
Tomasz Nowickid60fc382015-03-24 14:02:49 +000034#include <linux/acpi.h>
Rob Herring4294f8b2011-09-28 21:25:31 -050035#include <linux/irqdomain.h>
Marc Zyngier292b2932011-07-20 16:24:14 +010036#include <linux/interrupt.h>
37#include <linux/percpu.h>
Marc Zyngier745f1fb2022-02-09 16:26:00 +000038#include <linux/seq_file.h>
Marc Zyngier292b2932011-07-20 16:24:14 +010039#include <linux/slab.h>
Joel Porquet41a83e062015-07-07 17:11:46 -040040#include <linux/irqchip.h>
Catalin Marinasde88cbb2013-01-18 15:31:37 +000041#include <linux/irqchip/chained_irq.h>
Rob Herring520f7bd2012-12-27 13:10:24 -060042#include <linux/irqchip/arm-gic.h>
Russell Kingf27ecac2005-08-18 21:31:00 +010043
Tomasz Figa29e697b2014-07-17 17:23:44 +020044#include <asm/cputype.h>
Russell Kingf27ecac2005-08-18 21:31:00 +010045#include <asm/irq.h>
Marc Zyngier562e0022011-09-06 09:56:17 +010046#include <asm/exception.h>
Will Deaconeb504392012-01-20 12:01:12 +010047#include <asm/smp_plat.h>
Marc Zyngier0b996fd2015-08-26 17:00:44 +010048#include <asm/virt.h>
Russell Kingf27ecac2005-08-18 21:31:00 +010049
Marc Zyngierd51d0af2014-06-30 16:01:30 +010050#include "irq-gic-common.h"
Russell Kingf27ecac2005-08-18 21:31:00 +010051
Marc Zyngier76e52dd2015-09-30 12:01:16 +010052#ifdef CONFIG_ARM64
53#include <asm/cpufeature.h>
54
55static void gic_check_cpu_features(void)
56{
Mark Rutland0e62ccb2023-01-30 14:54:25 +000057 WARN_TAINT_ONCE(this_cpu_has_cap(ARM64_HAS_GIC_CPUIF_SYSREGS),
Marc Zyngier76e52dd2015-09-30 12:01:16 +010058 TAINT_CPU_OUT_OF_SPEC,
59 "GICv3 system registers enabled, broken firmware!\n");
60}
61#else
62#define gic_check_cpu_features() do { } while(0)
63#endif
64
Marc Zyngierdb0d4db2011-11-12 16:09:49 +000065union gic_base {
66 void __iomem *common_base;
Stephen Boyd68593582014-03-04 17:02:01 -080067 void __percpu * __iomem *percpu_base;
Marc Zyngierdb0d4db2011-11-12 16:09:49 +000068};
69
70struct gic_chip_data {
Marc Zyngierdb0d4db2011-11-12 16:09:49 +000071 union gic_base dist_base;
72 union gic_base cpu_base;
Jon Hunterf673b9b2016-05-10 16:14:44 +010073 void __iomem *raw_dist_base;
74 void __iomem *raw_cpu_base;
75 u32 percpu_offset;
Jon Hunter9c8eddd2016-06-07 16:12:34 +010076#if defined(CONFIG_CPU_PM) || defined(CONFIG_ARM_GIC_PM)
Marc Zyngierdb0d4db2011-11-12 16:09:49 +000077 u32 saved_spi_enable[DIV_ROUND_UP(1020, 32)];
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +000078 u32 saved_spi_active[DIV_ROUND_UP(1020, 32)];
Marc Zyngierdb0d4db2011-11-12 16:09:49 +000079 u32 saved_spi_conf[DIV_ROUND_UP(1020, 16)];
80 u32 saved_spi_target[DIV_ROUND_UP(1020, 4)];
81 u32 __percpu *saved_ppi_enable;
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +000082 u32 __percpu *saved_ppi_active;
Marc Zyngierdb0d4db2011-11-12 16:09:49 +000083 u32 __percpu *saved_ppi_conf;
84#endif
Grant Likely75294952012-02-14 14:06:57 -070085 struct irq_domain *domain;
Marc Zyngierdb0d4db2011-11-12 16:09:49 +000086 unsigned int gic_irqs;
Marc Zyngierdb0d4db2011-11-12 16:09:49 +000087};
88
Marc Zyngier04c8b0f2016-06-27 18:11:43 +010089#ifdef CONFIG_BL_SWITCHER
90
91static DEFINE_RAW_SPINLOCK(cpu_map_lock);
92
93#define gic_lock_irqsave(f) \
94 raw_spin_lock_irqsave(&cpu_map_lock, (f))
95#define gic_unlock_irqrestore(f) \
96 raw_spin_unlock_irqrestore(&cpu_map_lock, (f))
97
98#define gic_lock() raw_spin_lock(&cpu_map_lock)
99#define gic_unlock() raw_spin_unlock(&cpu_map_lock)
100
101#else
102
103#define gic_lock_irqsave(f) do { (void)(f); } while(0)
104#define gic_unlock_irqrestore(f) do { (void)(f); } while(0)
105
106#define gic_lock() do { } while(0)
107#define gic_unlock() do { } while(0)
108
109#endif
Russell Kingf27ecac2005-08-18 21:31:00 +0100110
Marc Zyngierb78f2692021-09-10 18:29:25 +0100111static DEFINE_STATIC_KEY_FALSE(needs_rmw_access);
112
Santosh Shilimkard7ed36a2011-03-02 08:03:22 +0100113/*
Nicolas Pitre384a2902012-04-11 18:55:48 -0400114 * The GIC mapping of CPU interfaces does not necessarily match
115 * the logical CPU numbering. Let's use a mapping as returned
116 * by the GIC itself.
117 */
118#define NR_GIC_CPU_IF 8
119static u8 gic_cpu_map[NR_GIC_CPU_IF] __read_mostly;
120
Davidlohr Buesod01d3272018-03-26 14:09:25 -0700121static DEFINE_STATIC_KEY_TRUE(supports_deactivate_key);
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100122
Linus Walleija27d21e2015-12-18 10:44:53 +0100123static struct gic_chip_data gic_data[CONFIG_ARM_GIC_MAX_NR] __read_mostly;
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100124
Marc Zyngier0e5cb7772021-02-27 10:23:45 +0000125static struct gic_kvm_info gic_v2_kvm_info __initdata;
Julien Grall502d6df2016-04-11 16:32:54 +0100126
Marc Zyngier64a267e2020-04-25 15:24:01 +0100127static DEFINE_PER_CPU(u32, sgi_intid);
128
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000129#ifdef CONFIG_GIC_NON_BANKED
Marc Zyngier8594c3b2020-09-15 14:03:51 +0100130static DEFINE_STATIC_KEY_FALSE(frankengic_key);
131
132static void enable_frankengic(void)
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000133{
Marc Zyngier8594c3b2020-09-15 14:03:51 +0100134 static_branch_enable(&frankengic_key);
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000135}
136
Marc Zyngier8594c3b2020-09-15 14:03:51 +0100137static inline void __iomem *__get_base(union gic_base *base)
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000138{
Marc Zyngier8594c3b2020-09-15 14:03:51 +0100139 if (static_branch_unlikely(&frankengic_key))
140 return raw_cpu_read(*base->percpu_base);
141
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000142 return base->common_base;
143}
144
Marc Zyngier8594c3b2020-09-15 14:03:51 +0100145#define gic_data_dist_base(d) __get_base(&(d)->dist_base)
146#define gic_data_cpu_base(d) __get_base(&(d)->cpu_base)
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000147#else
148#define gic_data_dist_base(d) ((d)->dist_base.common_base)
149#define gic_data_cpu_base(d) ((d)->cpu_base.common_base)
Marc Zyngier8594c3b2020-09-15 14:03:51 +0100150#define enable_frankengic() do { } while(0)
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000151#endif
152
Lennert Buytenhek7d1f4282010-11-29 10:18:20 +0100153static inline void __iomem *gic_dist_base(struct irq_data *d)
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100154{
Lennert Buytenhek7d1f4282010-11-29 10:18:20 +0100155 struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000156 return gic_data_dist_base(gic_data);
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100157}
158
Lennert Buytenhek7d1f4282010-11-29 10:18:20 +0100159static inline void __iomem *gic_cpu_base(struct irq_data *d)
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100160{
Lennert Buytenhek7d1f4282010-11-29 10:18:20 +0100161 struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000162 return gic_data_cpu_base(gic_data);
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100163}
164
Lennert Buytenhek7d1f4282010-11-29 10:18:20 +0100165static inline unsigned int gic_irq(struct irq_data *d)
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100166{
Rob Herring4294f8b2011-09-28 21:25:31 -0500167 return d->hwirq;
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100168}
169
Marc Zyngier01f779f2015-08-26 17:00:45 +0100170static inline bool cascading_gic_irq(struct irq_data *d)
171{
172 void *data = irq_data_get_irq_handler_data(d);
173
174 /*
Thomas Gleixner714665352015-09-15 12:37:36 +0200175 * If handler_data is set, this is a cascading interrupt, and
176 * it cannot possibly be forwarded.
Marc Zyngier01f779f2015-08-26 17:00:45 +0100177 */
Thomas Gleixner714665352015-09-15 12:37:36 +0200178 return data != NULL;
Marc Zyngier01f779f2015-08-26 17:00:45 +0100179}
180
Russell Kingf27ecac2005-08-18 21:31:00 +0100181/*
182 * Routines to acknowledge, disable and enable interrupts
Russell Kingf27ecac2005-08-18 21:31:00 +0100183 */
Marc Zyngier56717802015-03-18 11:01:23 +0000184static void gic_poke_irq(struct irq_data *d, u32 offset)
Russell Kingf27ecac2005-08-18 21:31:00 +0100185{
Rob Herring4294f8b2011-09-28 21:25:31 -0500186 u32 mask = 1 << (gic_irq(d) % 32);
Marc Zyngier56717802015-03-18 11:01:23 +0000187 writel_relaxed(mask, gic_dist_base(d) + offset + (gic_irq(d) / 32) * 4);
188}
189
190static int gic_peek_irq(struct irq_data *d, u32 offset)
191{
192 u32 mask = 1 << (gic_irq(d) % 32);
193 return !!(readl_relaxed(gic_dist_base(d) + offset + (gic_irq(d) / 32) * 4) & mask);
194}
195
196static void gic_mask_irq(struct irq_data *d)
197{
Marc Zyngier56717802015-03-18 11:01:23 +0000198 gic_poke_irq(d, GIC_DIST_ENABLE_CLEAR);
Russell Kingf27ecac2005-08-18 21:31:00 +0100199}
200
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100201static void gic_eoimode1_mask_irq(struct irq_data *d)
202{
203 gic_mask_irq(d);
Marc Zyngier01f779f2015-08-26 17:00:45 +0100204 /*
205 * When masking a forwarded interrupt, make sure it is
206 * deactivated as well.
207 *
208 * This ensures that an interrupt that is getting
209 * disabled/masked will not get "stuck", because there is
210 * noone to deactivate it (guest is being terminated).
211 */
Thomas Gleixner714665352015-09-15 12:37:36 +0200212 if (irqd_is_forwarded_to_vcpu(d))
Marc Zyngier01f779f2015-08-26 17:00:45 +0100213 gic_poke_irq(d, GIC_DIST_ACTIVE_CLEAR);
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100214}
215
Lennert Buytenhek7d1f4282010-11-29 10:18:20 +0100216static void gic_unmask_irq(struct irq_data *d)
Russell Kingf27ecac2005-08-18 21:31:00 +0100217{
Marc Zyngier56717802015-03-18 11:01:23 +0000218 gic_poke_irq(d, GIC_DIST_ENABLE_SET);
Russell Kingf27ecac2005-08-18 21:31:00 +0100219}
220
Will Deacon1a017532011-02-09 12:01:12 +0000221static void gic_eoi_irq(struct irq_data *d)
222{
Marc Zyngier64a267e2020-04-25 15:24:01 +0100223 u32 hwirq = gic_irq(d);
224
225 if (hwirq < 16)
226 hwirq = this_cpu_read(sgi_intid);
227
228 writel_relaxed(hwirq, gic_cpu_base(d) + GIC_CPU_EOI);
Will Deacon1a017532011-02-09 12:01:12 +0000229}
230
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100231static void gic_eoimode1_eoi_irq(struct irq_data *d)
232{
Marc Zyngier64a267e2020-04-25 15:24:01 +0100233 u32 hwirq = gic_irq(d);
234
Marc Zyngier01f779f2015-08-26 17:00:45 +0100235 /* Do not deactivate an IRQ forwarded to a vcpu. */
Thomas Gleixner714665352015-09-15 12:37:36 +0200236 if (irqd_is_forwarded_to_vcpu(d))
Marc Zyngier01f779f2015-08-26 17:00:45 +0100237 return;
238
Marc Zyngier64a267e2020-04-25 15:24:01 +0100239 if (hwirq < 16)
240 hwirq = this_cpu_read(sgi_intid);
241
242 writel_relaxed(hwirq, gic_cpu_base(d) + GIC_CPU_DEACTIVATE);
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100243}
244
Marc Zyngier56717802015-03-18 11:01:23 +0000245static int gic_irq_set_irqchip_state(struct irq_data *d,
246 enum irqchip_irq_state which, bool val)
247{
248 u32 reg;
249
250 switch (which) {
251 case IRQCHIP_STATE_PENDING:
252 reg = val ? GIC_DIST_PENDING_SET : GIC_DIST_PENDING_CLEAR;
253 break;
254
255 case IRQCHIP_STATE_ACTIVE:
256 reg = val ? GIC_DIST_ACTIVE_SET : GIC_DIST_ACTIVE_CLEAR;
257 break;
258
259 case IRQCHIP_STATE_MASKED:
260 reg = val ? GIC_DIST_ENABLE_CLEAR : GIC_DIST_ENABLE_SET;
261 break;
262
263 default:
264 return -EINVAL;
265 }
266
267 gic_poke_irq(d, reg);
268 return 0;
269}
270
271static int gic_irq_get_irqchip_state(struct irq_data *d,
272 enum irqchip_irq_state which, bool *val)
273{
274 switch (which) {
275 case IRQCHIP_STATE_PENDING:
276 *val = gic_peek_irq(d, GIC_DIST_PENDING_SET);
277 break;
278
279 case IRQCHIP_STATE_ACTIVE:
280 *val = gic_peek_irq(d, GIC_DIST_ACTIVE_SET);
281 break;
282
283 case IRQCHIP_STATE_MASKED:
284 *val = !gic_peek_irq(d, GIC_DIST_ENABLE_SET);
285 break;
286
287 default:
288 return -EINVAL;
289 }
290
291 return 0;
292}
293
Lennert Buytenhek7d1f4282010-11-29 10:18:20 +0100294static int gic_set_type(struct irq_data *d, unsigned int type)
Rabin Vincent5c0c1f02010-05-28 04:37:38 +0100295{
Lennert Buytenhek7d1f4282010-11-29 10:18:20 +0100296 void __iomem *base = gic_dist_base(d);
297 unsigned int gicirq = gic_irq(d);
Marc Zyngier13d22e22019-07-16 14:35:17 +0100298 int ret;
Rabin Vincent5c0c1f02010-05-28 04:37:38 +0100299
300 /* Interrupt configuration for SGIs can't be changed */
301 if (gicirq < 16)
Marc Zyngier8594c3b2020-09-15 14:03:51 +0100302 return type != IRQ_TYPE_EDGE_RISING ? -EINVAL : 0;
Rabin Vincent5c0c1f02010-05-28 04:37:38 +0100303
Liviu Dudaufb7e7de2015-01-20 16:52:59 +0000304 /* SPIs have restrictions on the supported types */
305 if (gicirq >= 32 && type != IRQ_TYPE_LEVEL_HIGH &&
306 type != IRQ_TYPE_EDGE_RISING)
Rabin Vincent5c0c1f02010-05-28 04:37:38 +0100307 return -EINVAL;
308
Marc Zyngier13d22e22019-07-16 14:35:17 +0100309 ret = gic_configure_irq(gicirq, type, base + GIC_DIST_CONFIG, NULL);
310 if (ret && gicirq < 32) {
311 /* Misconfigured PPIs are usually not fatal */
312 pr_warn("GIC: PPI%d is secure or misconfigured\n", gicirq - 16);
313 ret = 0;
314 }
315
316 return ret;
Santosh Shilimkard7ed36a2011-03-02 08:03:22 +0100317}
318
Marc Zyngier01f779f2015-08-26 17:00:45 +0100319static int gic_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu)
320{
321 /* Only interrupts on the primary GIC can be forwarded to a vcpu. */
Marc Zyngier64a267e2020-04-25 15:24:01 +0100322 if (cascading_gic_irq(d) || gic_irq(d) < 16)
Marc Zyngier01f779f2015-08-26 17:00:45 +0100323 return -EINVAL;
324
Thomas Gleixner714665352015-09-15 12:37:36 +0200325 if (vcpu)
326 irqd_set_forwarded_to_vcpu(d);
327 else
328 irqd_clr_forwarded_to_vcpu(d);
Marc Zyngier01f779f2015-08-26 17:00:45 +0100329 return 0;
330}
331
Valentin Schneider17f644e2020-07-30 18:03:20 +0100332static int gic_retrigger(struct irq_data *data)
333{
334 return !gic_irq_set_irqchip_state(data, IRQCHIP_STATE_PENDING, true);
335}
336
Stephen Boyd8783dd32014-03-04 16:40:30 -0800337static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
Marc Zyngier562e0022011-09-06 09:56:17 +0100338{
339 u32 irqstat, irqnr;
340 struct gic_chip_data *gic = &gic_data[0];
341 void __iomem *cpu_base = gic_data_cpu_base(gic);
342
343 do {
344 irqstat = readl_relaxed(cpu_base + GIC_CPU_INTACK);
Haojian Zhuangb8802f72014-05-11 16:05:58 +0800345 irqnr = irqstat & GICC_IAR_INT_ID_MASK;
Marc Zyngier562e0022011-09-06 09:56:17 +0100346
Marc Zyngier64a267e2020-04-25 15:24:01 +0100347 if (unlikely(irqnr >= 1020))
348 break;
349
350 if (static_branch_likely(&supports_deactivate_key))
Marc Zyngier562e0022011-09-06 09:56:17 +0100351 writel_relaxed(irqstat, cpu_base + GIC_CPU_EOI);
Marc Zyngier64a267e2020-04-25 15:24:01 +0100352 isb();
353
354 /*
355 * Ensure any shared data written by the CPU sending the IPI
356 * is read after we've read the ACK register on the GIC.
357 *
358 * Pairs with the write barrier in gic_ipi_send_mask
359 */
360 if (irqnr <= 15) {
Will Deaconf86c4fb2016-04-26 12:00:00 +0100361 smp_rmb();
Marc Zyngier64a267e2020-04-25 15:24:01 +0100362
363 /*
364 * The GIC encodes the source CPU in GICC_IAR,
365 * leading to the deactivation to fail if not
366 * written back as is to GICC_EOI. Stash the INTID
367 * away for gic_eoi_irq() to write back. This only
368 * works because we don't nest SGIs...
369 */
370 this_cpu_write(sgi_intid, irqstat);
Marc Zyngier562e0022011-09-06 09:56:17 +0100371 }
Marc Zyngier64a267e2020-04-25 15:24:01 +0100372
Mark Rutland0953fb22021-10-20 20:23:09 +0100373 generic_handle_domain_irq(gic->domain, irqnr);
Marc Zyngier562e0022011-09-06 09:56:17 +0100374 } while (1);
375}
376
Thomas Gleixnerbd0b9ac2015-09-14 10:42:37 +0200377static void gic_handle_cascade_irq(struct irq_desc *desc)
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100378{
Jiang Liu5b292642015-06-04 12:13:20 +0800379 struct gic_chip_data *chip_data = irq_desc_get_handler_data(desc);
380 struct irq_chip *chip = irq_desc_get_chip(desc);
Marc Zyngier046a6ee2021-05-04 17:42:18 +0100381 unsigned int gic_irq;
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100382 unsigned long status;
Marc Zyngier046a6ee2021-05-04 17:42:18 +0100383 int ret;
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100384
Will Deacon1a017532011-02-09 12:01:12 +0000385 chained_irq_enter(chip, desc);
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100386
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000387 status = readl_relaxed(gic_data_cpu_base(chip_data) + GIC_CPU_INTACK);
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100388
Feng Kane5f81532014-07-30 14:56:58 -0700389 gic_irq = (status & GICC_IAR_INT_ID_MASK);
390 if (gic_irq == GICC_INT_SPURIOUS)
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100391 goto out;
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100392
Marc Zyngier046a6ee2021-05-04 17:42:18 +0100393 isb();
394 ret = generic_handle_domain_irq(chip_data->domain, gic_irq);
395 if (unlikely(ret))
Thomas Gleixnerbd0b9ac2015-09-14 10:42:37 +0200396 handle_bad_irq(desc);
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100397 out:
Will Deacon1a017532011-02-09 12:01:12 +0000398 chained_irq_exit(chip, desc);
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100399}
400
Marc Zyngier745f1fb2022-02-09 16:26:00 +0000401static void gic_irq_print_chip(struct irq_data *d, struct seq_file *p)
402{
403 struct gic_chip_data *gic = irq_data_get_irq_chip_data(d);
404
Thomas Gleixner6a9fc412022-11-25 00:24:12 +0100405 if (gic->domain->pm_dev)
406 seq_printf(p, gic->domain->pm_dev->of_node->name);
Marc Zyngier745f1fb2022-02-09 16:26:00 +0000407 else
408 seq_printf(p, "GIC-%d", (int)(gic - &gic_data[0]));
409}
Russell Kingf27ecac2005-08-18 21:31:00 +0100410
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100411void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)
412{
Linus Walleija27d21e2015-12-18 10:44:53 +0100413 BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
Thomas Gleixner4d83fcf2015-06-21 21:10:53 +0200414 irq_set_chained_handler_and_data(irq, gic_handle_cascade_irq,
415 &gic_data[gic_nr]);
Catalin Marinasb3a1bde2007-02-14 19:14:56 +0100416}
417
Russell King2bb31352013-01-30 23:49:57 +0000418static u8 gic_get_cpumask(struct gic_chip_data *gic)
419{
420 void __iomem *base = gic_data_dist_base(gic);
421 u32 mask, i;
422
423 for (i = mask = 0; i < 32; i += 4) {
424 mask = readl_relaxed(base + GIC_DIST_TARGET + i);
425 mask |= mask >> 16;
426 mask |= mask >> 8;
427 if (mask)
428 break;
429 }
430
Stephen Boyd6e3aca4412015-03-11 23:21:31 -0700431 if (!mask && num_possible_cpus() > 1)
Russell King2bb31352013-01-30 23:49:57 +0000432 pr_crit("GIC CPU mask not found - kernel will fail to boot.\n");
433
434 return mask;
435}
436
Marc Zyngierc5e10352018-03-09 14:53:19 +0000437static bool gic_check_gicv2(void __iomem *base)
438{
439 u32 val = readl_relaxed(base + GIC_CPU_IDENT);
440 return (val & 0xff0fff) == 0x02043B;
441}
442
Jon Hunter4c2880b2015-07-31 09:44:12 +0100443static void gic_cpu_if_up(struct gic_chip_data *gic)
Feng Kan32289502014-07-30 14:56:59 -0700444{
Jon Hunter4c2880b2015-07-31 09:44:12 +0100445 void __iomem *cpu_base = gic_data_cpu_base(gic);
Feng Kan32289502014-07-30 14:56:59 -0700446 u32 bypass = 0;
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100447 u32 mode = 0;
Marc Zyngierc5e10352018-03-09 14:53:19 +0000448 int i;
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100449
Davidlohr Buesod01d3272018-03-26 14:09:25 -0700450 if (gic == &gic_data[0] && static_branch_likely(&supports_deactivate_key))
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100451 mode = GIC_CPU_CTRL_EOImodeNS;
Feng Kan32289502014-07-30 14:56:59 -0700452
Marc Zyngierc5e10352018-03-09 14:53:19 +0000453 if (gic_check_gicv2(cpu_base))
454 for (i = 0; i < 4; i++)
455 writel_relaxed(0, cpu_base + GIC_CPU_ACTIVEPRIO + i * 4);
456
Feng Kan32289502014-07-30 14:56:59 -0700457 /*
458 * Preserve bypass disable bits to be written back later
459 */
460 bypass = readl(cpu_base + GIC_CPU_CTRL);
461 bypass &= GICC_DIS_BYPASS_MASK;
462
Marc Zyngier0b996fd2015-08-26 17:00:44 +0100463 writel_relaxed(bypass | mode | GICC_ENABLE, cpu_base + GIC_CPU_CTRL);
Feng Kan32289502014-07-30 14:56:59 -0700464}
465
466
Jon Huntercdbb8132016-06-07 16:12:32 +0100467static void gic_dist_init(struct gic_chip_data *gic)
Russell Kingf27ecac2005-08-18 21:31:00 +0100468{
Grant Likely75294952012-02-14 14:06:57 -0700469 unsigned int i;
Will Deacon267840f2011-08-23 22:20:03 +0100470 u32 cpumask;
Rob Herring4294f8b2011-09-28 21:25:31 -0500471 unsigned int gic_irqs = gic->gic_irqs;
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000472 void __iomem *base = gic_data_dist_base(gic);
Russell Kingf27ecac2005-08-18 21:31:00 +0100473
Feng Kane5f81532014-07-30 14:56:58 -0700474 writel_relaxed(GICD_DISABLE, base + GIC_DIST_CTRL);
Russell Kingf27ecac2005-08-18 21:31:00 +0100475
476 /*
Russell Kingf27ecac2005-08-18 21:31:00 +0100477 * Set all global interrupts to this CPU only.
478 */
Russell King2bb31352013-01-30 23:49:57 +0000479 cpumask = gic_get_cpumask(gic);
480 cpumask |= cpumask << 8;
481 cpumask |= cpumask << 16;
Pawel Molle6afec92010-11-26 13:45:43 +0100482 for (i = 32; i < gic_irqs; i += 4)
Santosh Shilimkar6ac77e42011-03-28 19:27:46 +0530483 writel_relaxed(cpumask, base + GIC_DIST_TARGET + i * 4 / 4);
Russell Kingf27ecac2005-08-18 21:31:00 +0100484
Marc Zyngierd51d0af2014-06-30 16:01:30 +0100485 gic_dist_config(base, gic_irqs, NULL);
Russell Kingf27ecac2005-08-18 21:31:00 +0100486
Feng Kane5f81532014-07-30 14:56:58 -0700487 writel_relaxed(GICD_ENABLE, base + GIC_DIST_CTRL);
Russell Kingf27ecac2005-08-18 21:31:00 +0100488}
489
Jon Hunterdc9722c2016-05-10 16:14:42 +0100490static int gic_cpu_init(struct gic_chip_data *gic)
Russell Kingf27ecac2005-08-18 21:31:00 +0100491{
Marc Zyngierdb0d4db2011-11-12 16:09:49 +0000492 void __iomem *dist_base = gic_data_dist_base(gic);
493 void __iomem *base = gic_data_cpu_base(gic);
Nicolas Pitre384a2902012-04-11 18:55:48 -0400494 unsigned int cpu_mask, cpu = smp_processor_id();
Russell King9395f6e2010-11-11 23:10:30 +0000495 int i;
496
Russell King9395f6e2010-11-11 23:10:30 +0000497 /*
Jon Hunter567e5a02015-07-31 09:44:11 +0100498 * Setting up the CPU map is only relevant for the primary GIC
499 * because any nested/secondary GICs do not directly interface
500 * with the CPU(s).
Nicolas Pitre384a2902012-04-11 18:55:48 -0400501 */
Jon Hunter567e5a02015-07-31 09:44:11 +0100502 if (gic == &gic_data[0]) {
503 /*
504 * Get what the GIC says our CPU mask is.
505 */
Jon Hunterdc9722c2016-05-10 16:14:42 +0100506 if (WARN_ON(cpu >= NR_GIC_CPU_IF))
507 return -EINVAL;
508
Marc Zyngier25fc11a2016-04-22 12:25:33 +0100509 gic_check_cpu_features();
Jon Hunter567e5a02015-07-31 09:44:11 +0100510 cpu_mask = gic_get_cpumask(gic);
511 gic_cpu_map[cpu] = cpu_mask;
Nicolas Pitre384a2902012-04-11 18:55:48 -0400512
Jon Hunter567e5a02015-07-31 09:44:11 +0100513 /*
514 * Clear our mask from the other map entries in case they're
515 * still undefined.
516 */
517 for (i = 0; i < NR_GIC_CPU_IF; i++)
518 if (i != cpu)
519 gic_cpu_map[i] &= ~cpu_mask;
520 }
Nicolas Pitre384a2902012-04-11 18:55:48 -0400521
Marc Zyngier1a60e1e2019-07-18 11:15:14 +0100522 gic_cpu_config(dist_base, 32, NULL);
Russell King9395f6e2010-11-11 23:10:30 +0000523
Feng Kane5f81532014-07-30 14:56:58 -0700524 writel_relaxed(GICC_INT_PRI_THRESHOLD, base + GIC_CPU_PRIMASK);
Jon Hunter4c2880b2015-07-31 09:44:12 +0100525 gic_cpu_if_up(gic);
Jon Hunterdc9722c2016-05-10 16:14:42 +0100526
527 return 0;
Russell Kingf27ecac2005-08-18 21:31:00 +0100528}
529
Jon Hunter4c2880b2015-07-31 09:44:12 +0100530int gic_cpu_if_down(unsigned int gic_nr)
Nicolas Pitre10d9eb82013-03-19 23:59:04 -0400531{
Jon Hunter4c2880b2015-07-31 09:44:12 +0100532 void __iomem *cpu_base;
Feng Kan32289502014-07-30 14:56:59 -0700533 u32 val = 0;
534
Linus Walleija27d21e2015-12-18 10:44:53 +0100535 if (gic_nr >= CONFIG_ARM_GIC_MAX_NR)
Jon Hunter4c2880b2015-07-31 09:44:12 +0100536 return -EINVAL;
537
538 cpu_base = gic_data_cpu_base(&gic_data[gic_nr]);
Feng Kan32289502014-07-30 14:56:59 -0700539 val = readl(cpu_base + GIC_CPU_CTRL);
540 val &= ~GICC_ENABLE;
541 writel_relaxed(val, cpu_base + GIC_CPU_CTRL);
Jon Hunter4c2880b2015-07-31 09:44:12 +0100542
543 return 0;
Nicolas Pitre10d9eb82013-03-19 23:59:04 -0400544}
545
Jon Hunter9c8eddd2016-06-07 16:12:34 +0100546#if defined(CONFIG_CPU_PM) || defined(CONFIG_ARM_GIC_PM)
Colin Cross254056f2011-02-10 12:54:10 -0800547/*
548 * Saves the GIC distributor registers during suspend or idle. Must be called
549 * with interrupts disabled but before powering down the GIC. After calling
550 * this function, no interrupts will be delivered by the GIC, and another
551 * platform-specific wakeup source must be enabled.
552 */
Jon Huntercdbb8132016-06-07 16:12:32 +0100553void gic_dist_save(struct gic_chip_data *gic)
Colin Cross254056f2011-02-10 12:54:10 -0800554{
555 unsigned int gic_irqs;
556 void __iomem *dist_base;
557 int i;
558
Jon Hunter6e5b5922016-05-10 16:14:43 +0100559 if (WARN_ON(!gic))
560 return;
Colin Cross254056f2011-02-10 12:54:10 -0800561
Jon Hunter6e5b5922016-05-10 16:14:43 +0100562 gic_irqs = gic->gic_irqs;
563 dist_base = gic_data_dist_base(gic);
Colin Cross254056f2011-02-10 12:54:10 -0800564
565 if (!dist_base)
566 return;
567
568 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 16); i++)
Jon Hunter6e5b5922016-05-10 16:14:43 +0100569 gic->saved_spi_conf[i] =
Colin Cross254056f2011-02-10 12:54:10 -0800570 readl_relaxed(dist_base + GIC_DIST_CONFIG + i * 4);
571
572 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 4); i++)
Jon Hunter6e5b5922016-05-10 16:14:43 +0100573 gic->saved_spi_target[i] =
Colin Cross254056f2011-02-10 12:54:10 -0800574 readl_relaxed(dist_base + GIC_DIST_TARGET + i * 4);
575
576 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 32); i++)
Jon Hunter6e5b5922016-05-10 16:14:43 +0100577 gic->saved_spi_enable[i] =
Colin Cross254056f2011-02-10 12:54:10 -0800578 readl_relaxed(dist_base + GIC_DIST_ENABLE_SET + i * 4);
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +0000579
580 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 32); i++)
Jon Hunter6e5b5922016-05-10 16:14:43 +0100581 gic->saved_spi_active[i] =
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +0000582 readl_relaxed(dist_base + GIC_DIST_ACTIVE_SET + i * 4);
Colin Cross254056f2011-02-10 12:54:10 -0800583}
584
585/*
586 * Restores the GIC distributor registers during resume or when coming out of
587 * idle. Must be called before enabling interrupts. If a level interrupt
Ingo Molnarc5f48c02018-12-03 11:44:51 +0100588 * that occurred while the GIC was suspended is still present, it will be
589 * handled normally, but any edge interrupts that occurred will not be seen by
Colin Cross254056f2011-02-10 12:54:10 -0800590 * the GIC and need to be handled by the platform-specific wakeup source.
591 */
Jon Huntercdbb8132016-06-07 16:12:32 +0100592void gic_dist_restore(struct gic_chip_data *gic)
Colin Cross254056f2011-02-10 12:54:10 -0800593{
594 unsigned int gic_irqs;
595 unsigned int i;
596 void __iomem *dist_base;
597
Jon Hunter6e5b5922016-05-10 16:14:43 +0100598 if (WARN_ON(!gic))
599 return;
Colin Cross254056f2011-02-10 12:54:10 -0800600
Jon Hunter6e5b5922016-05-10 16:14:43 +0100601 gic_irqs = gic->gic_irqs;
602 dist_base = gic_data_dist_base(gic);
Colin Cross254056f2011-02-10 12:54:10 -0800603
604 if (!dist_base)
605 return;
606
Feng Kane5f81532014-07-30 14:56:58 -0700607 writel_relaxed(GICD_DISABLE, dist_base + GIC_DIST_CTRL);
Colin Cross254056f2011-02-10 12:54:10 -0800608
609 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 16); i++)
Jon Hunter6e5b5922016-05-10 16:14:43 +0100610 writel_relaxed(gic->saved_spi_conf[i],
Colin Cross254056f2011-02-10 12:54:10 -0800611 dist_base + GIC_DIST_CONFIG + i * 4);
612
613 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 4); i++)
Feng Kane5f81532014-07-30 14:56:58 -0700614 writel_relaxed(GICD_INT_DEF_PRI_X4,
Colin Cross254056f2011-02-10 12:54:10 -0800615 dist_base + GIC_DIST_PRI + i * 4);
616
617 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 4); i++)
Jon Hunter6e5b5922016-05-10 16:14:43 +0100618 writel_relaxed(gic->saved_spi_target[i],
Colin Cross254056f2011-02-10 12:54:10 -0800619 dist_base + GIC_DIST_TARGET + i * 4);
620
Marc Zyngier92eda4a2015-11-16 19:13:27 +0000621 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 32); i++) {
622 writel_relaxed(GICD_INT_EN_CLR_X32,
623 dist_base + GIC_DIST_ENABLE_CLEAR + i * 4);
Jon Hunter6e5b5922016-05-10 16:14:43 +0100624 writel_relaxed(gic->saved_spi_enable[i],
Colin Cross254056f2011-02-10 12:54:10 -0800625 dist_base + GIC_DIST_ENABLE_SET + i * 4);
Marc Zyngier92eda4a2015-11-16 19:13:27 +0000626 }
Colin Cross254056f2011-02-10 12:54:10 -0800627
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +0000628 for (i = 0; i < DIV_ROUND_UP(gic_irqs, 32); i++) {
629 writel_relaxed(GICD_INT_EN_CLR_X32,
630 dist_base + GIC_DIST_ACTIVE_CLEAR + i * 4);
Jon Hunter6e5b5922016-05-10 16:14:43 +0100631 writel_relaxed(gic->saved_spi_active[i],
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +0000632 dist_base + GIC_DIST_ACTIVE_SET + i * 4);
633 }
634
Feng Kane5f81532014-07-30 14:56:58 -0700635 writel_relaxed(GICD_ENABLE, dist_base + GIC_DIST_CTRL);
Colin Cross254056f2011-02-10 12:54:10 -0800636}
637
Jon Huntercdbb8132016-06-07 16:12:32 +0100638void gic_cpu_save(struct gic_chip_data *gic)
Colin Cross254056f2011-02-10 12:54:10 -0800639{
640 int i;
641 u32 *ptr;
642 void __iomem *dist_base;
643 void __iomem *cpu_base;
644
Jon Hunter6e5b5922016-05-10 16:14:43 +0100645 if (WARN_ON(!gic))
646 return;
Colin Cross254056f2011-02-10 12:54:10 -0800647
Jon Hunter6e5b5922016-05-10 16:14:43 +0100648 dist_base = gic_data_dist_base(gic);
649 cpu_base = gic_data_cpu_base(gic);
Colin Cross254056f2011-02-10 12:54:10 -0800650
651 if (!dist_base || !cpu_base)
652 return;
653
Jon Hunter6e5b5922016-05-10 16:14:43 +0100654 ptr = raw_cpu_ptr(gic->saved_ppi_enable);
Colin Cross254056f2011-02-10 12:54:10 -0800655 for (i = 0; i < DIV_ROUND_UP(32, 32); i++)
656 ptr[i] = readl_relaxed(dist_base + GIC_DIST_ENABLE_SET + i * 4);
657
Jon Hunter6e5b5922016-05-10 16:14:43 +0100658 ptr = raw_cpu_ptr(gic->saved_ppi_active);
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +0000659 for (i = 0; i < DIV_ROUND_UP(32, 32); i++)
660 ptr[i] = readl_relaxed(dist_base + GIC_DIST_ACTIVE_SET + i * 4);
661
Jon Hunter6e5b5922016-05-10 16:14:43 +0100662 ptr = raw_cpu_ptr(gic->saved_ppi_conf);
Colin Cross254056f2011-02-10 12:54:10 -0800663 for (i = 0; i < DIV_ROUND_UP(32, 16); i++)
664 ptr[i] = readl_relaxed(dist_base + GIC_DIST_CONFIG + i * 4);
665
666}
667
Jon Huntercdbb8132016-06-07 16:12:32 +0100668void gic_cpu_restore(struct gic_chip_data *gic)
Colin Cross254056f2011-02-10 12:54:10 -0800669{
670 int i;
671 u32 *ptr;
672 void __iomem *dist_base;
673 void __iomem *cpu_base;
674
Jon Hunter6e5b5922016-05-10 16:14:43 +0100675 if (WARN_ON(!gic))
676 return;
Colin Cross254056f2011-02-10 12:54:10 -0800677
Jon Hunter6e5b5922016-05-10 16:14:43 +0100678 dist_base = gic_data_dist_base(gic);
679 cpu_base = gic_data_cpu_base(gic);
Colin Cross254056f2011-02-10 12:54:10 -0800680
681 if (!dist_base || !cpu_base)
682 return;
683
Jon Hunter6e5b5922016-05-10 16:14:43 +0100684 ptr = raw_cpu_ptr(gic->saved_ppi_enable);
Marc Zyngier92eda4a2015-11-16 19:13:27 +0000685 for (i = 0; i < DIV_ROUND_UP(32, 32); i++) {
686 writel_relaxed(GICD_INT_EN_CLR_X32,
687 dist_base + GIC_DIST_ENABLE_CLEAR + i * 4);
Colin Cross254056f2011-02-10 12:54:10 -0800688 writel_relaxed(ptr[i], dist_base + GIC_DIST_ENABLE_SET + i * 4);
Marc Zyngier92eda4a2015-11-16 19:13:27 +0000689 }
Colin Cross254056f2011-02-10 12:54:10 -0800690
Jon Hunter6e5b5922016-05-10 16:14:43 +0100691 ptr = raw_cpu_ptr(gic->saved_ppi_active);
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +0000692 for (i = 0; i < DIV_ROUND_UP(32, 32); i++) {
693 writel_relaxed(GICD_INT_EN_CLR_X32,
694 dist_base + GIC_DIST_ACTIVE_CLEAR + i * 4);
695 writel_relaxed(ptr[i], dist_base + GIC_DIST_ACTIVE_SET + i * 4);
696 }
697
Jon Hunter6e5b5922016-05-10 16:14:43 +0100698 ptr = raw_cpu_ptr(gic->saved_ppi_conf);
Colin Cross254056f2011-02-10 12:54:10 -0800699 for (i = 0; i < DIV_ROUND_UP(32, 16); i++)
700 writel_relaxed(ptr[i], dist_base + GIC_DIST_CONFIG + i * 4);
701
702 for (i = 0; i < DIV_ROUND_UP(32, 4); i++)
Feng Kane5f81532014-07-30 14:56:58 -0700703 writel_relaxed(GICD_INT_DEF_PRI_X4,
704 dist_base + GIC_DIST_PRI + i * 4);
Colin Cross254056f2011-02-10 12:54:10 -0800705
Feng Kane5f81532014-07-30 14:56:58 -0700706 writel_relaxed(GICC_INT_PRI_THRESHOLD, cpu_base + GIC_CPU_PRIMASK);
Jon Hunter6e5b5922016-05-10 16:14:43 +0100707 gic_cpu_if_up(gic);
Colin Cross254056f2011-02-10 12:54:10 -0800708}
709
710static int gic_notifier(struct notifier_block *self, unsigned long cmd, void *v)
711{
712 int i;
713
Linus Walleija27d21e2015-12-18 10:44:53 +0100714 for (i = 0; i < CONFIG_ARM_GIC_MAX_NR; i++) {
Colin Cross254056f2011-02-10 12:54:10 -0800715 switch (cmd) {
716 case CPU_PM_ENTER:
Jon Hunter6e5b5922016-05-10 16:14:43 +0100717 gic_cpu_save(&gic_data[i]);
Colin Cross254056f2011-02-10 12:54:10 -0800718 break;
719 case CPU_PM_ENTER_FAILED:
720 case CPU_PM_EXIT:
Jon Hunter6e5b5922016-05-10 16:14:43 +0100721 gic_cpu_restore(&gic_data[i]);
Colin Cross254056f2011-02-10 12:54:10 -0800722 break;
723 case CPU_CLUSTER_PM_ENTER:
Jon Hunter6e5b5922016-05-10 16:14:43 +0100724 gic_dist_save(&gic_data[i]);
Colin Cross254056f2011-02-10 12:54:10 -0800725 break;
726 case CPU_CLUSTER_PM_ENTER_FAILED:
727 case CPU_CLUSTER_PM_EXIT:
Jon Hunter6e5b5922016-05-10 16:14:43 +0100728 gic_dist_restore(&gic_data[i]);
Colin Cross254056f2011-02-10 12:54:10 -0800729 break;
730 }
731 }
732
733 return NOTIFY_OK;
734}
735
736static struct notifier_block gic_notifier_block = {
737 .notifier_call = gic_notifier,
738};
739
Jon Huntercdbb8132016-06-07 16:12:32 +0100740static int gic_pm_init(struct gic_chip_data *gic)
Colin Cross254056f2011-02-10 12:54:10 -0800741{
742 gic->saved_ppi_enable = __alloc_percpu(DIV_ROUND_UP(32, 32) * 4,
743 sizeof(u32));
Jon Hunterdc9722c2016-05-10 16:14:42 +0100744 if (WARN_ON(!gic->saved_ppi_enable))
745 return -ENOMEM;
Colin Cross254056f2011-02-10 12:54:10 -0800746
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +0000747 gic->saved_ppi_active = __alloc_percpu(DIV_ROUND_UP(32, 32) * 4,
748 sizeof(u32));
Jon Hunterdc9722c2016-05-10 16:14:42 +0100749 if (WARN_ON(!gic->saved_ppi_active))
750 goto free_ppi_enable;
Marc Zyngier1c7d4dd2015-11-16 19:13:28 +0000751
Colin Cross254056f2011-02-10 12:54:10 -0800752 gic->saved_ppi_conf = __alloc_percpu(DIV_ROUND_UP(32, 16) * 4,
753 sizeof(u32));
Jon Hunterdc9722c2016-05-10 16:14:42 +0100754 if (WARN_ON(!gic->saved_ppi_conf))
755 goto free_ppi_active;
Colin Cross254056f2011-02-10 12:54:10 -0800756
Marc Zyngierabdd7b92011-11-25 17:58:19 +0100757 if (gic == &gic_data[0])
758 cpu_pm_register_notifier(&gic_notifier_block);
Jon Hunterdc9722c2016-05-10 16:14:42 +0100759
760 return 0;
761
762free_ppi_active:
763 free_percpu(gic->saved_ppi_active);
764free_ppi_enable:
765 free_percpu(gic->saved_ppi_enable);
766
767 return -ENOMEM;
Colin Cross254056f2011-02-10 12:54:10 -0800768}
769#else
Jon Huntercdbb8132016-06-07 16:12:32 +0100770static int gic_pm_init(struct gic_chip_data *gic)
Colin Cross254056f2011-02-10 12:54:10 -0800771{
Jon Hunterdc9722c2016-05-10 16:14:42 +0100772 return 0;
Colin Cross254056f2011-02-10 12:54:10 -0800773}
774#endif
775
Rob Herringb1cffeb2012-11-26 15:05:48 -0600776#ifdef CONFIG_SMP
Marc Zyngierb78f2692021-09-10 18:29:25 +0100777static void rmw_writeb(u8 bval, void __iomem *addr)
778{
779 static DEFINE_RAW_SPINLOCK(rmw_lock);
780 unsigned long offset = (unsigned long)addr & 3UL;
781 unsigned long shift = offset * 8;
782 unsigned long flags;
783 u32 val;
784
785 raw_spin_lock_irqsave(&rmw_lock, flags);
786
787 addr -= offset;
788 val = readl_relaxed(addr);
789 val &= ~GENMASK(shift + 7, shift);
790 val |= bval << shift;
791 writel_relaxed(val, addr);
792
793 raw_spin_unlock_irqrestore(&rmw_lock, flags);
794}
795
Marc Zyngier7ec46b52020-04-25 15:24:01 +0100796static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
797 bool force)
798{
799 void __iomem *reg = gic_dist_base(d) + GIC_DIST_TARGET + gic_irq(d);
Marc Zyngier745f1fb2022-02-09 16:26:00 +0000800 struct gic_chip_data *gic = irq_data_get_irq_chip_data(d);
Marc Zyngier7ec46b52020-04-25 15:24:01 +0100801 unsigned int cpu;
802
Marc Zyngier745f1fb2022-02-09 16:26:00 +0000803 if (unlikely(gic != &gic_data[0]))
804 return -EINVAL;
805
Marc Zyngier7ec46b52020-04-25 15:24:01 +0100806 if (!force)
807 cpu = cpumask_any_and(mask_val, cpu_online_mask);
808 else
809 cpu = cpumask_first(mask_val);
810
811 if (cpu >= NR_GIC_CPU_IF || cpu >= nr_cpu_ids)
812 return -EINVAL;
813
Marc Zyngierb78f2692021-09-10 18:29:25 +0100814 if (static_branch_unlikely(&needs_rmw_access))
815 rmw_writeb(gic_cpu_map[cpu], reg);
816 else
817 writeb_relaxed(gic_cpu_map[cpu], reg);
Marc Zyngier7ec46b52020-04-25 15:24:01 +0100818 irq_data_update_effective_affinity(d, cpumask_of(cpu));
819
820 return IRQ_SET_MASK_OK_DONE;
821}
822
Marc Zyngier64a267e2020-04-25 15:24:01 +0100823static void gic_ipi_send_mask(struct irq_data *d, const struct cpumask *mask)
Rob Herringb1cffeb2012-11-26 15:05:48 -0600824{
825 int cpu;
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400826 unsigned long flags, map = 0;
827
Marc Zyngier059e2322016-08-09 07:50:44 +0100828 if (unlikely(nr_cpu_ids == 1)) {
829 /* Only one CPU? let's do a self-IPI... */
Marc Zyngier64a267e2020-04-25 15:24:01 +0100830 writel_relaxed(2 << 24 | d->hwirq,
Marc Zyngier059e2322016-08-09 07:50:44 +0100831 gic_data_dist_base(&gic_data[0]) + GIC_DIST_SOFTINT);
832 return;
833 }
834
Marc Zyngier04c8b0f2016-06-27 18:11:43 +0100835 gic_lock_irqsave(flags);
Rob Herringb1cffeb2012-11-26 15:05:48 -0600836
837 /* Convert our logical CPU mask into a physical one. */
838 for_each_cpu(cpu, mask)
Javi Merino91bdf0d2013-02-19 13:52:22 +0000839 map |= gic_cpu_map[cpu];
Rob Herringb1cffeb2012-11-26 15:05:48 -0600840
841 /*
842 * Ensure that stores to Normal memory are visible to the
Will Deacon8adbf572014-02-20 17:42:07 +0000843 * other CPUs before they observe us issuing the IPI.
Rob Herringb1cffeb2012-11-26 15:05:48 -0600844 */
Will Deacon8adbf572014-02-20 17:42:07 +0000845 dmb(ishst);
Rob Herringb1cffeb2012-11-26 15:05:48 -0600846
847 /* this always happens on GIC0 */
Marc Zyngier64a267e2020-04-25 15:24:01 +0100848 writel_relaxed(map << 16 | d->hwirq, gic_data_dist_base(&gic_data[0]) + GIC_DIST_SOFTINT);
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400849
Marc Zyngier04c8b0f2016-06-27 18:11:43 +0100850 gic_unlock_irqrestore(flags);
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400851}
Marc Zyngier7ec46b52020-04-25 15:24:01 +0100852
853static int gic_starting_cpu(unsigned int cpu)
854{
855 gic_cpu_init(&gic_data[0]);
856 return 0;
857}
858
859static __init void gic_smp_init(void)
860{
Marc Zyngier64a267e2020-04-25 15:24:01 +0100861 struct irq_fwspec sgi_fwspec = {
862 .fwnode = gic_data[0].domain->fwnode,
863 .param_count = 1,
864 };
865 int base_sgi;
866
Marc Zyngier7ec46b52020-04-25 15:24:01 +0100867 cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_GIC_STARTING,
868 "irqchip/arm/gic:starting",
869 gic_starting_cpu, NULL);
Marc Zyngier64a267e2020-04-25 15:24:01 +0100870
Johan Hovold0e2213f2022-12-13 15:08:43 +0100871 base_sgi = irq_domain_alloc_irqs(gic_data[0].domain, 8, NUMA_NO_NODE, &sgi_fwspec);
Marc Zyngier64a267e2020-04-25 15:24:01 +0100872 if (WARN_ON(base_sgi <= 0))
873 return;
874
875 set_smp_ipi_range(base_sgi, 8);
Marc Zyngier7ec46b52020-04-25 15:24:01 +0100876}
877#else
878#define gic_smp_init() do { } while(0)
879#define gic_set_affinity NULL
Marc Zyngier64a267e2020-04-25 15:24:01 +0100880#define gic_ipi_send_mask NULL
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400881#endif
882
Marc Zyngier745f1fb2022-02-09 16:26:00 +0000883static const struct irq_chip gic_chip = {
884 .irq_mask = gic_mask_irq,
885 .irq_unmask = gic_unmask_irq,
886 .irq_eoi = gic_eoi_irq,
887 .irq_set_type = gic_set_type,
888 .irq_retrigger = gic_retrigger,
889 .irq_set_affinity = gic_set_affinity,
890 .ipi_send_mask = gic_ipi_send_mask,
891 .irq_get_irqchip_state = gic_irq_get_irqchip_state,
892 .irq_set_irqchip_state = gic_irq_set_irqchip_state,
893 .irq_print_chip = gic_irq_print_chip,
894 .flags = IRQCHIP_SET_TYPE_MASKED |
895 IRQCHIP_SKIP_SET_WAKE |
896 IRQCHIP_MASK_ON_SUSPEND,
897};
898
899static const struct irq_chip gic_chip_mode1 = {
900 .name = "GICv2",
901 .irq_mask = gic_eoimode1_mask_irq,
902 .irq_unmask = gic_unmask_irq,
903 .irq_eoi = gic_eoimode1_eoi_irq,
904 .irq_set_type = gic_set_type,
905 .irq_retrigger = gic_retrigger,
906 .irq_set_affinity = gic_set_affinity,
907 .ipi_send_mask = gic_ipi_send_mask,
908 .irq_get_irqchip_state = gic_irq_get_irqchip_state,
909 .irq_set_irqchip_state = gic_irq_set_irqchip_state,
910 .irq_set_vcpu_affinity = gic_irq_set_vcpu_affinity,
911 .flags = IRQCHIP_SET_TYPE_MASKED |
912 IRQCHIP_SKIP_SET_WAKE |
913 IRQCHIP_MASK_ON_SUSPEND,
914};
915
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400916#ifdef CONFIG_BL_SWITCHER
917/*
Nicolas Pitre14d2ca62012-11-28 18:48:19 -0500918 * gic_send_sgi - send a SGI directly to given CPU interface number
919 *
920 * cpu_id: the ID for the destination CPU interface
921 * irq: the IPI number to send a SGI for
922 */
923void gic_send_sgi(unsigned int cpu_id, unsigned int irq)
924{
925 BUG_ON(cpu_id >= NR_GIC_CPU_IF);
926 cpu_id = 1 << cpu_id;
927 /* this always happens on GIC0 */
928 writel_relaxed((cpu_id << 16) | irq, gic_data_dist_base(&gic_data[0]) + GIC_DIST_SOFTINT);
929}
930
931/*
Nicolas Pitreed967622012-07-05 21:33:26 -0400932 * gic_get_cpu_id - get the CPU interface ID for the specified CPU
933 *
934 * @cpu: the logical CPU number to get the GIC ID for.
935 *
936 * Return the CPU interface ID for the given logical CPU number,
937 * or -1 if the CPU number is too large or the interface ID is
938 * unknown (more than one bit set).
939 */
940int gic_get_cpu_id(unsigned int cpu)
941{
942 unsigned int cpu_bit;
943
944 if (cpu >= NR_GIC_CPU_IF)
945 return -1;
946 cpu_bit = gic_cpu_map[cpu];
947 if (cpu_bit & (cpu_bit - 1))
948 return -1;
949 return __ffs(cpu_bit);
950}
951
952/*
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400953 * gic_migrate_target - migrate IRQs to another CPU interface
954 *
955 * @new_cpu_id: the CPU target ID to migrate IRQs to
956 *
957 * Migrate all peripheral interrupts with a target matching the current CPU
958 * to the interface corresponding to @new_cpu_id. The CPU interface mapping
959 * is also updated. Targets to other CPU interfaces are unchanged.
960 * This must be called with IRQs locally disabled.
961 */
962void gic_migrate_target(unsigned int new_cpu_id)
963{
964 unsigned int cur_cpu_id, gic_irqs, gic_nr = 0;
965 void __iomem *dist_base;
966 int i, ror_val, cpu = smp_processor_id();
967 u32 val, cur_target_mask, active_mask;
968
Linus Walleija27d21e2015-12-18 10:44:53 +0100969 BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400970
971 dist_base = gic_data_dist_base(&gic_data[gic_nr]);
972 if (!dist_base)
973 return;
974 gic_irqs = gic_data[gic_nr].gic_irqs;
975
976 cur_cpu_id = __ffs(gic_cpu_map[cpu]);
977 cur_target_mask = 0x01010101 << cur_cpu_id;
978 ror_val = (cur_cpu_id - new_cpu_id) & 31;
979
Marc Zyngier04c8b0f2016-06-27 18:11:43 +0100980 gic_lock();
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400981
982 /* Update the target interface for this logical CPU */
983 gic_cpu_map[cpu] = 1 << new_cpu_id;
984
985 /*
Ingo Molnarc5f48c02018-12-03 11:44:51 +0100986 * Find all the peripheral interrupts targeting the current
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -0400987 * CPU interface and migrate them to the new CPU interface.
988 * We skip DIST_TARGET 0 to 7 as they are read-only.
989 */
990 for (i = 8; i < DIV_ROUND_UP(gic_irqs, 4); i++) {
991 val = readl_relaxed(dist_base + GIC_DIST_TARGET + i * 4);
992 active_mask = val & cur_target_mask;
993 if (active_mask) {
994 val &= ~active_mask;
995 val |= ror32(active_mask, ror_val);
996 writel_relaxed(val, dist_base + GIC_DIST_TARGET + i*4);
997 }
998 }
999
Marc Zyngier04c8b0f2016-06-27 18:11:43 +01001000 gic_unlock();
Nicolas Pitre1a6b69b2012-04-12 01:40:31 -04001001
1002 /*
1003 * Now let's migrate and clear any potential SGIs that might be
1004 * pending for us (cur_cpu_id). Since GIC_DIST_SGI_PENDING_SET
1005 * is a banked register, we can only forward the SGI using
1006 * GIC_DIST_SOFTINT. The original SGI source is lost but Linux
1007 * doesn't use that information anyway.
1008 *
1009 * For the same reason we do not adjust SGI source information
1010 * for previously sent SGIs by us to other CPUs either.
1011 */
1012 for (i = 0; i < 16; i += 4) {
1013 int j;
1014 val = readl_relaxed(dist_base + GIC_DIST_SGI_PENDING_SET + i);
1015 if (!val)
1016 continue;
1017 writel_relaxed(val, dist_base + GIC_DIST_SGI_PENDING_CLEAR + i);
1018 for (j = i; j < i + 4; j++) {
1019 if (val & 0xff)
1020 writel_relaxed((1 << (new_cpu_id + 16)) | j,
1021 dist_base + GIC_DIST_SOFTINT);
1022 val >>= 8;
1023 }
1024 }
Rob Herringb1cffeb2012-11-26 15:05:48 -06001025}
Nicolas Pitreeeb44652012-11-28 18:17:25 -05001026
1027/*
1028 * gic_get_sgir_physaddr - get the physical address for the SGI register
1029 *
Geert Uytterhoeven42a590b2020-12-09 11:15:04 +01001030 * Return the physical address of the SGI register to be used
Nicolas Pitreeeb44652012-11-28 18:17:25 -05001031 * by some early assembly code when the kernel is not yet available.
1032 */
1033static unsigned long gic_dist_physaddr;
1034
1035unsigned long gic_get_sgir_physaddr(void)
1036{
1037 if (!gic_dist_physaddr)
1038 return 0;
1039 return gic_dist_physaddr + GIC_DIST_SOFTINT;
1040}
1041
Baoyou Xie89c59cc2016-09-07 19:26:45 +08001042static void __init gic_init_physaddr(struct device_node *node)
Nicolas Pitreeeb44652012-11-28 18:17:25 -05001043{
1044 struct resource res;
1045 if (of_address_to_resource(node, 0, &res) == 0) {
1046 gic_dist_physaddr = res.start;
1047 pr_info("GIC physical location is %#lx\n", gic_dist_physaddr);
1048 }
1049}
1050
1051#else
1052#define gic_init_physaddr(node) do { } while (0)
Rob Herringb1cffeb2012-11-26 15:05:48 -06001053#endif
1054
Grant Likely75294952012-02-14 14:06:57 -07001055static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
1056 irq_hw_number_t hw)
1057{
Linus Walleij58b89642015-10-24 00:15:53 +02001058 struct gic_chip_data *gic = d->host_data;
Valentin Schneider1b57d912020-07-30 18:03:21 +01001059 struct irq_data *irqd = irq_desc_get_irq_data(irq_to_desc(irq));
Marc Zyngier745f1fb2022-02-09 16:26:00 +00001060 const struct irq_chip *chip;
1061
1062 chip = (static_branch_likely(&supports_deactivate_key) &&
1063 gic == &gic_data[0]) ? &gic_chip_mode1 : &gic_chip;
Marc Zyngier0b996fd2015-08-26 17:00:44 +01001064
Marc Zyngier64a267e2020-04-25 15:24:01 +01001065 switch (hw) {
Valentin Schneider6abbd692020-11-09 09:41:17 +00001066 case 0 ... 31:
Grant Likely75294952012-02-14 14:06:57 -07001067 irq_set_percpu_devid(irq);
Marc Zyngier745f1fb2022-02-09 16:26:00 +00001068 irq_domain_set_info(d, irq, hw, chip, d->host_data,
Yingjoe Chen9a1091e2014-11-25 16:04:19 +08001069 handle_percpu_devid_irq, NULL, NULL);
Marc Zyngier64a267e2020-04-25 15:24:01 +01001070 break;
1071 default:
Marc Zyngier745f1fb2022-02-09 16:26:00 +00001072 irq_domain_set_info(d, irq, hw, chip, d->host_data,
Yingjoe Chen9a1091e2014-11-25 16:04:19 +08001073 handle_fasteoi_irq, NULL, NULL);
Rob Herringd17cab42015-08-29 18:01:22 -05001074 irq_set_probe(irq);
Valentin Schneider1b57d912020-07-30 18:03:21 +01001075 irqd_set_single_target(irqd);
Marc Zyngier64a267e2020-04-25 15:24:01 +01001076 break;
Grant Likely75294952012-02-14 14:06:57 -07001077 }
Valentin Schneider1b57d912020-07-30 18:03:21 +01001078
1079 /* Prevents SW retriggers which mess up the ACK/EOI ordering */
1080 irqd_set_handle_enforce_irqctx(irqd);
Grant Likely75294952012-02-14 14:06:57 -07001081 return 0;
1082}
1083
Marc Zyngierf833f572015-10-13 12:51:33 +01001084static int gic_irq_domain_translate(struct irq_domain *d,
1085 struct irq_fwspec *fwspec,
1086 unsigned long *hwirq,
1087 unsigned int *type)
1088{
Marc Zyngier64a267e2020-04-25 15:24:01 +01001089 if (fwspec->param_count == 1 && fwspec->param[0] < 16) {
1090 *hwirq = fwspec->param[0];
1091 *type = IRQ_TYPE_EDGE_RISING;
1092 return 0;
1093 }
1094
Marc Zyngierf833f572015-10-13 12:51:33 +01001095 if (is_of_node(fwspec->fwnode)) {
1096 if (fwspec->param_count < 3)
1097 return -EINVAL;
1098
Marc Zyngier64a267e2020-04-25 15:24:01 +01001099 switch (fwspec->param[0]) {
1100 case 0: /* SPI */
1101 *hwirq = fwspec->param[1] + 32;
1102 break;
1103 case 1: /* PPI */
1104 *hwirq = fwspec->param[1] + 16;
1105 break;
1106 default:
1107 return -EINVAL;
1108 }
Marc Zyngierf833f572015-10-13 12:51:33 +01001109
1110 *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK;
Marc Zyngier83a86fb2018-03-16 14:35:17 +00001111
1112 /* Make it clear that broken DTs are... broken */
Florian Fainelli4c5b2be2022-03-08 12:11:16 -08001113 WARN(*type == IRQ_TYPE_NONE,
1114 "HW irq %ld has invalid type\n", *hwirq);
Marc Zyngierf833f572015-10-13 12:51:33 +01001115 return 0;
1116 }
1117
Suravee Suthikulpanit75aba7b2015-12-10 08:55:28 -08001118 if (is_fwnode_irqchip(fwspec->fwnode)) {
Marc Zyngier891ae762015-10-13 12:51:40 +01001119 if(fwspec->param_count != 2)
1120 return -EINVAL;
1121
Andre Przywara544808f2022-04-04 12:08:42 +01001122 if (fwspec->param[0] < 16) {
1123 pr_err(FW_BUG "Illegal GSI%d translation request\n",
1124 fwspec->param[0]);
1125 return -EINVAL;
1126 }
1127
Marc Zyngier891ae762015-10-13 12:51:40 +01001128 *hwirq = fwspec->param[0];
1129 *type = fwspec->param[1];
Marc Zyngier83a86fb2018-03-16 14:35:17 +00001130
Florian Fainelli4c5b2be2022-03-08 12:11:16 -08001131 WARN(*type == IRQ_TYPE_NONE,
1132 "HW irq %ld has invalid type\n", *hwirq);
Marc Zyngier891ae762015-10-13 12:51:40 +01001133 return 0;
1134 }
1135
Marc Zyngierf833f572015-10-13 12:51:33 +01001136 return -EINVAL;
1137}
1138
Yingjoe Chen9a1091e2014-11-25 16:04:19 +08001139static int gic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
1140 unsigned int nr_irqs, void *arg)
1141{
1142 int i, ret;
1143 irq_hw_number_t hwirq;
1144 unsigned int type = IRQ_TYPE_NONE;
Marc Zyngierf833f572015-10-13 12:51:33 +01001145 struct irq_fwspec *fwspec = arg;
Yingjoe Chen9a1091e2014-11-25 16:04:19 +08001146
Marc Zyngierf833f572015-10-13 12:51:33 +01001147 ret = gic_irq_domain_translate(domain, fwspec, &hwirq, &type);
Yingjoe Chen9a1091e2014-11-25 16:04:19 +08001148 if (ret)
1149 return ret;
1150
Suzuki K Poulose456c59c2017-07-04 10:56:34 +01001151 for (i = 0; i < nr_irqs; i++) {
1152 ret = gic_irq_domain_map(domain, virq + i, hwirq + i);
1153 if (ret)
1154 return ret;
1155 }
Yingjoe Chen9a1091e2014-11-25 16:04:19 +08001156
1157 return 0;
1158}
1159
1160static const struct irq_domain_ops gic_irq_domain_hierarchy_ops = {
Marc Zyngierf833f572015-10-13 12:51:33 +01001161 .translate = gic_irq_domain_translate,
Yingjoe Chen9a1091e2014-11-25 16:04:19 +08001162 .alloc = gic_irq_domain_alloc,
1163 .free = irq_domain_free_irqs_top,
1164};
1165
Marc Zyngierb41fdc42019-03-11 15:38:10 +00001166static int gic_init_bases(struct gic_chip_data *gic,
Jon Hunterfaea6452016-06-07 16:12:31 +01001167 struct fwnode_handle *handle)
1168{
Marc Zyngierb41fdc42019-03-11 15:38:10 +00001169 int gic_irqs, ret;
Jon Hunter7bf29d32016-02-09 15:24:56 +00001170
Jon Hunterf673b9b2016-05-10 16:14:44 +01001171 if (IS_ENABLED(CONFIG_GIC_NON_BANKED) && gic->percpu_offset) {
Jon Hunterdc9722c2016-05-10 16:14:42 +01001172 /* Frankein-GIC without banked registers... */
Marc Zyngierdb0d4db2011-11-12 16:09:49 +00001173 unsigned int cpu;
1174
1175 gic->dist_base.percpu_base = alloc_percpu(void __iomem *);
1176 gic->cpu_base.percpu_base = alloc_percpu(void __iomem *);
1177 if (WARN_ON(!gic->dist_base.percpu_base ||
1178 !gic->cpu_base.percpu_base)) {
Jon Hunterdc9722c2016-05-10 16:14:42 +01001179 ret = -ENOMEM;
1180 goto error;
Marc Zyngierdb0d4db2011-11-12 16:09:49 +00001181 }
1182
1183 for_each_possible_cpu(cpu) {
Tomasz Figa29e697b2014-07-17 17:23:44 +02001184 u32 mpidr = cpu_logical_map(cpu);
1185 u32 core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
Jon Hunterf673b9b2016-05-10 16:14:44 +01001186 unsigned long offset = gic->percpu_offset * core_id;
1187 *per_cpu_ptr(gic->dist_base.percpu_base, cpu) =
1188 gic->raw_dist_base + offset;
1189 *per_cpu_ptr(gic->cpu_base.percpu_base, cpu) =
1190 gic->raw_cpu_base + offset;
Marc Zyngierdb0d4db2011-11-12 16:09:49 +00001191 }
1192
Marc Zyngier8594c3b2020-09-15 14:03:51 +01001193 enable_frankengic();
Jon Hunterdc9722c2016-05-10 16:14:42 +01001194 } else {
1195 /* Normal, sane GIC... */
Jon Hunterf673b9b2016-05-10 16:14:44 +01001196 WARN(gic->percpu_offset,
Marc Zyngierdb0d4db2011-11-12 16:09:49 +00001197 "GIC_NON_BANKED not enabled, ignoring %08x offset!",
Jon Hunterf673b9b2016-05-10 16:14:44 +01001198 gic->percpu_offset);
1199 gic->dist_base.common_base = gic->raw_dist_base;
1200 gic->cpu_base.common_base = gic->raw_cpu_base;
Marc Zyngierdb0d4db2011-11-12 16:09:49 +00001201 }
Russell Kingbef8f9e2010-12-04 16:50:58 +00001202
Rob Herring4294f8b2011-09-28 21:25:31 -05001203 /*
Rob Herring4294f8b2011-09-28 21:25:31 -05001204 * Find out how many interrupts are supported.
1205 * The GIC only supports up to 1020 interrupt sources.
1206 */
Marc Zyngierdb0d4db2011-11-12 16:09:49 +00001207 gic_irqs = readl_relaxed(gic_data_dist_base(gic) + GIC_DIST_CTR) & 0x1f;
Rob Herring4294f8b2011-09-28 21:25:31 -05001208 gic_irqs = (gic_irqs + 1) * 32;
1209 if (gic_irqs > 1020)
1210 gic_irqs = 1020;
1211 gic->gic_irqs = gic_irqs;
1212
Marc Zyngierdee2340322023-03-15 13:02:18 +00001213 gic->domain = irq_domain_create_linear(handle, gic_irqs,
1214 &gic_irq_domain_hierarchy_ops,
1215 gic);
Jon Hunterdc9722c2016-05-10 16:14:42 +01001216 if (WARN_ON(!gic->domain)) {
1217 ret = -ENODEV;
1218 goto error;
1219 }
Russell Kingbef8f9e2010-12-04 16:50:58 +00001220
Rob Herring4294f8b2011-09-28 21:25:31 -05001221 gic_dist_init(gic);
Jon Hunterdc9722c2016-05-10 16:14:42 +01001222 ret = gic_cpu_init(gic);
1223 if (ret)
1224 goto error;
1225
1226 ret = gic_pm_init(gic);
1227 if (ret)
1228 goto error;
1229
1230 return 0;
1231
1232error:
Jon Hunterf673b9b2016-05-10 16:14:44 +01001233 if (IS_ENABLED(CONFIG_GIC_NON_BANKED) && gic->percpu_offset) {
Jon Hunterdc9722c2016-05-10 16:14:42 +01001234 free_percpu(gic->dist_base.percpu_base);
1235 free_percpu(gic->cpu_base.percpu_base);
1236 }
1237
Jon Hunterdc9722c2016-05-10 16:14:42 +01001238 return ret;
Russell Kingb580b892010-12-04 15:55:14 +00001239}
1240
Jon Hunterd6ce5642016-06-07 16:12:30 +01001241static int __init __gic_init_bases(struct gic_chip_data *gic,
Jon Hunterd6ce5642016-06-07 16:12:30 +01001242 struct fwnode_handle *handle)
1243{
Jon Hunterfaea6452016-06-07 16:12:31 +01001244 int i, ret;
Jon Hunterd6ce5642016-06-07 16:12:30 +01001245
1246 if (WARN_ON(!gic || gic->domain))
1247 return -EINVAL;
1248
1249 if (gic == &gic_data[0]) {
1250 /*
1251 * Initialize the CPU interface map to all CPUs.
1252 * It will be refined as each CPU probes its ID.
1253 * This is only necessary for the primary GIC.
1254 */
1255 for (i = 0; i < NR_GIC_CPU_IF; i++)
1256 gic_cpu_map[i] = 0xff;
Marc Zyngier7ec46b52020-04-25 15:24:01 +01001257
Jon Hunterd6ce5642016-06-07 16:12:30 +01001258 set_handle_irq(gic_handle_irq);
Davidlohr Buesod01d3272018-03-26 14:09:25 -07001259 if (static_branch_likely(&supports_deactivate_key))
Jon Hunterd6ce5642016-06-07 16:12:30 +01001260 pr_info("GIC: Using split EOI/Deactivate mode\n");
1261 }
1262
Marc Zyngierb41fdc42019-03-11 15:38:10 +00001263 ret = gic_init_bases(gic, handle);
Marc Zyngier745f1fb2022-02-09 16:26:00 +00001264 if (gic == &gic_data[0])
Marc Zyngier7ec46b52020-04-25 15:24:01 +01001265 gic_smp_init();
Jon Hunterfaea6452016-06-07 16:12:31 +01001266
1267 return ret;
Jon Hunterd6ce5642016-06-07 16:12:30 +01001268}
1269
Jon Hunterd6490462016-05-10 16:14:45 +01001270static void gic_teardown(struct gic_chip_data *gic)
1271{
1272 if (WARN_ON(!gic))
1273 return;
1274
1275 if (gic->raw_dist_base)
1276 iounmap(gic->raw_dist_base);
1277 if (gic->raw_cpu_base)
1278 iounmap(gic->raw_cpu_base);
Marc Zyngier4a6ac302015-09-01 10:08:53 +01001279}
1280
Sachin Kamat46f101d2013-03-13 15:05:15 +05301281static int gic_cnt __initdata;
Marc Zyngier09622892017-10-27 10:34:22 +02001282static bool gicv2_force_probe;
1283
1284static int __init gicv2_force_probe_cfg(char *buf)
1285{
Christophe JAILLET5e279732022-11-01 22:13:51 +01001286 return kstrtobool(buf, &gicv2_force_probe);
Marc Zyngier09622892017-10-27 10:34:22 +02001287}
1288early_param("irqchip.gicv2_force_probe", gicv2_force_probe_cfg);
1289
Marc Zyngier12e14062015-09-13 12:14:31 +01001290static bool gic_check_eoimode(struct device_node *node, void __iomem **base)
1291{
1292 struct resource cpuif_res;
1293
1294 of_address_to_resource(node, 1, &cpuif_res);
1295
1296 if (!is_hyp_mode_available())
1297 return false;
Marc Zyngier09622892017-10-27 10:34:22 +02001298 if (resource_size(&cpuif_res) < SZ_8K) {
1299 void __iomem *alt;
1300 /*
1301 * Check for a stupid firmware that only exposes the
1302 * first page of a GICv2.
1303 */
1304 if (!gic_check_gicv2(*base))
1305 return false;
1306
1307 if (!gicv2_force_probe) {
1308 pr_warn("GIC: GICv2 detected, but range too small and irqchip.gicv2_force_probe not set\n");
1309 return false;
1310 }
1311
1312 alt = ioremap(cpuif_res.start, SZ_8K);
1313 if (!alt)
1314 return false;
1315 if (!gic_check_gicv2(alt + SZ_4K)) {
1316 /*
1317 * The first page was that of a GICv2, and
1318 * the second was *something*. Let's trust it
1319 * to be a GICv2, and update the mapping.
1320 */
1321 pr_warn("GIC: GICv2 at %pa, but range is too small (broken DT?), assuming 8kB\n",
1322 &cpuif_res.start);
1323 iounmap(*base);
1324 *base = alt;
1325 return true;
1326 }
Marc Zyngier12e14062015-09-13 12:14:31 +01001327
1328 /*
Marc Zyngier09622892017-10-27 10:34:22 +02001329 * We detected *two* initial GICv2 pages in a
1330 * row. Could be a GICv2 aliased over two 64kB
1331 * pages. Update the resource, map the iospace, and
1332 * pray.
1333 */
1334 iounmap(alt);
1335 alt = ioremap(cpuif_res.start, SZ_128K);
1336 if (!alt)
1337 return false;
1338 pr_warn("GIC: Aliased GICv2 at %pa, trying to find the canonical range over 128kB\n",
1339 &cpuif_res.start);
1340 cpuif_res.end = cpuif_res.start + SZ_128K -1;
1341 iounmap(*base);
1342 *base = alt;
1343 }
1344 if (resource_size(&cpuif_res) == SZ_128K) {
1345 /*
1346 * Verify that we have the first 4kB of a GICv2
Marc Zyngier12e14062015-09-13 12:14:31 +01001347 * aliased over the first 64kB by checking the
1348 * GICC_IIDR register on both ends.
1349 */
Marc Zyngier09622892017-10-27 10:34:22 +02001350 if (!gic_check_gicv2(*base) ||
1351 !gic_check_gicv2(*base + 0xf000))
Marc Zyngier12e14062015-09-13 12:14:31 +01001352 return false;
1353
1354 /*
1355 * Move the base up by 60kB, so that we have a 8kB
1356 * contiguous region, which allows us to use GICC_DIR
1357 * at its normal offset. Please pass me that bucket.
1358 */
1359 *base += 0xf000;
1360 cpuif_res.start += 0xf000;
Marc Zyngierfd5bed42016-10-20 11:21:01 +01001361 pr_warn("GIC: Adjusting CPU interface base to %pa\n",
Marc Zyngier12e14062015-09-13 12:14:31 +01001362 &cpuif_res.start);
1363 }
1364
1365 return true;
1366}
1367
Marc Zyngierb78f2692021-09-10 18:29:25 +01001368static bool gic_enable_rmw_access(void *data)
1369{
1370 /*
1371 * The EMEV2 class of machines has a broken interconnect, and
1372 * locks up on accesses that are less than 32bit. So far, only
1373 * the affinity setting requires it.
1374 */
1375 if (of_machine_is_compatible("renesas,emev2")) {
1376 static_branch_enable(&needs_rmw_access);
1377 return true;
1378 }
1379
1380 return false;
1381}
1382
1383static const struct gic_quirk gic_quirks[] = {
1384 {
1385 .desc = "broken byte access",
1386 .compatible = "arm,pl390",
1387 .init = gic_enable_rmw_access,
1388 },
1389 { },
1390};
1391
Jon Hunter9c8eddd2016-06-07 16:12:34 +01001392static int gic_of_setup(struct gic_chip_data *gic, struct device_node *node)
Jon Hunterd6490462016-05-10 16:14:45 +01001393{
1394 if (!gic || !node)
1395 return -EINVAL;
1396
1397 gic->raw_dist_base = of_iomap(node, 0);
1398 if (WARN(!gic->raw_dist_base, "unable to map gic dist registers\n"))
1399 goto error;
1400
1401 gic->raw_cpu_base = of_iomap(node, 1);
1402 if (WARN(!gic->raw_cpu_base, "unable to map gic cpu registers\n"))
1403 goto error;
1404
1405 if (of_property_read_u32(node, "cpu-offset", &gic->percpu_offset))
1406 gic->percpu_offset = 0;
1407
Marc Zyngierb78f2692021-09-10 18:29:25 +01001408 gic_enable_of_quirks(node, gic_quirks, gic);
1409
Jon Hunterd6490462016-05-10 16:14:45 +01001410 return 0;
1411
1412error:
1413 gic_teardown(gic);
1414
1415 return -ENOMEM;
1416}
1417
Jon Hunter9c8eddd2016-06-07 16:12:34 +01001418int gic_of_init_child(struct device *dev, struct gic_chip_data **gic, int irq)
1419{
1420 int ret;
1421
1422 if (!dev || !dev->of_node || !gic || !irq)
1423 return -EINVAL;
1424
1425 *gic = devm_kzalloc(dev, sizeof(**gic), GFP_KERNEL);
1426 if (!*gic)
1427 return -ENOMEM;
1428
Jon Hunter9c8eddd2016-06-07 16:12:34 +01001429 ret = gic_of_setup(*gic, dev->of_node);
1430 if (ret)
1431 return ret;
1432
Marc Zyngierb41fdc42019-03-11 15:38:10 +00001433 ret = gic_init_bases(*gic, &dev->of_node->fwnode);
Jon Hunter9c8eddd2016-06-07 16:12:34 +01001434 if (ret) {
1435 gic_teardown(*gic);
1436 return ret;
1437 }
1438
Marc Zyngiere95f3ef2022-02-01 12:03:00 +00001439 irq_domain_set_pm_device((*gic)->domain, dev);
Jon Hunter9c8eddd2016-06-07 16:12:34 +01001440 irq_set_chained_handler_and_data(irq, gic_handle_cascade_irq, *gic);
1441
1442 return 0;
1443}
1444
Julien Grall502d6df2016-04-11 16:32:54 +01001445static void __init gic_of_setup_kvm_info(struct device_node *node)
1446{
1447 int ret;
1448 struct resource *vctrl_res = &gic_v2_kvm_info.vctrl;
1449 struct resource *vcpu_res = &gic_v2_kvm_info.vcpu;
1450
1451 gic_v2_kvm_info.type = GIC_V2;
1452
1453 gic_v2_kvm_info.maint_irq = irq_of_parse_and_map(node, 0);
1454 if (!gic_v2_kvm_info.maint_irq)
1455 return;
1456
1457 ret = of_address_to_resource(node, 2, vctrl_res);
1458 if (ret)
1459 return;
1460
1461 ret = of_address_to_resource(node, 3, vcpu_res);
1462 if (ret)
1463 return;
1464
Davidlohr Buesod01d3272018-03-26 14:09:25 -07001465 if (static_branch_likely(&supports_deactivate_key))
Marc Zyngier0e5cb7772021-02-27 10:23:45 +00001466 vgic_set_kvm_info(&gic_v2_kvm_info);
Julien Grall502d6df2016-04-11 16:32:54 +01001467}
1468
Linus Walleij8673c1d2015-10-24 00:15:52 +02001469int __init
Stephen Boyd68593582014-03-04 17:02:01 -08001470gic_of_init(struct device_node *node, struct device_node *parent)
Rob Herringb3f7ed02011-09-28 21:27:52 -05001471{
Jon Hunterf673b9b2016-05-10 16:14:44 +01001472 struct gic_chip_data *gic;
Jon Hunterdc9722c2016-05-10 16:14:42 +01001473 int irq, ret;
Rob Herringb3f7ed02011-09-28 21:27:52 -05001474
1475 if (WARN_ON(!node))
1476 return -ENODEV;
1477
Jon Hunterf673b9b2016-05-10 16:14:44 +01001478 if (WARN_ON(gic_cnt >= CONFIG_ARM_GIC_MAX_NR))
1479 return -EINVAL;
Rob Herringb3f7ed02011-09-28 21:27:52 -05001480
Jon Hunterf673b9b2016-05-10 16:14:44 +01001481 gic = &gic_data[gic_cnt];
1482
Jon Hunterd6490462016-05-10 16:14:45 +01001483 ret = gic_of_setup(gic, node);
1484 if (ret)
1485 return ret;
Rob Herringb3f7ed02011-09-28 21:27:52 -05001486
Marc Zyngier0b996fd2015-08-26 17:00:44 +01001487 /*
1488 * Disable split EOI/Deactivate if either HYP is not available
1489 * or the CPU interface is too small.
1490 */
Jon Hunterf673b9b2016-05-10 16:14:44 +01001491 if (gic_cnt == 0 && !gic_check_eoimode(node, &gic->raw_cpu_base))
Davidlohr Buesod01d3272018-03-26 14:09:25 -07001492 static_branch_disable(&supports_deactivate_key);
Marc Zyngier0b996fd2015-08-26 17:00:44 +01001493
Marc Zyngierb41fdc42019-03-11 15:38:10 +00001494 ret = __gic_init_bases(gic, &node->fwnode);
Jon Hunterdc9722c2016-05-10 16:14:42 +01001495 if (ret) {
Jon Hunterd6490462016-05-10 16:14:45 +01001496 gic_teardown(gic);
Jon Hunterdc9722c2016-05-10 16:14:42 +01001497 return ret;
1498 }
Marc Zyngierdb0d4db2011-11-12 16:09:49 +00001499
Julien Grall502d6df2016-04-11 16:32:54 +01001500 if (!gic_cnt) {
Nicolas Pitreeeb44652012-11-28 18:17:25 -05001501 gic_init_physaddr(node);
Julien Grall502d6df2016-04-11 16:32:54 +01001502 gic_of_setup_kvm_info(node);
1503 }
Rob Herringb3f7ed02011-09-28 21:27:52 -05001504
1505 if (parent) {
1506 irq = irq_of_parse_and_map(node, 0);
1507 gic_cascade_irq(gic_cnt, irq);
1508 }
Suravee Suthikulpanit853a33c2014-11-25 18:47:22 +00001509
1510 if (IS_ENABLED(CONFIG_ARM_GIC_V2M))
Suravee Suthikulpanit0644b3d2015-12-10 08:55:30 -08001511 gicv2m_init(&node->fwnode, gic_data[gic_cnt].domain);
Suravee Suthikulpanit853a33c2014-11-25 18:47:22 +00001512
Rob Herringb3f7ed02011-09-28 21:27:52 -05001513 gic_cnt++;
1514 return 0;
1515}
Suravee Suthikulpanit144cb082014-07-15 00:03:03 +02001516IRQCHIP_DECLARE(gic_400, "arm,gic-400", gic_of_init);
Linus Walleijfa6e2eec12014-10-01 09:29:22 +02001517IRQCHIP_DECLARE(arm11mp_gic, "arm,arm11mp-gic", gic_of_init);
1518IRQCHIP_DECLARE(arm1176jzf_dc_gic, "arm,arm1176jzf-devchip-gic", gic_of_init);
Rob Herring81243e42012-11-20 21:21:40 -06001519IRQCHIP_DECLARE(cortex_a15_gic, "arm,cortex-a15-gic", gic_of_init);
1520IRQCHIP_DECLARE(cortex_a9_gic, "arm,cortex-a9-gic", gic_of_init);
Matthias Bruggera97e80272014-07-03 13:58:52 +02001521IRQCHIP_DECLARE(cortex_a7_gic, "arm,cortex-a7-gic", gic_of_init);
Rob Herring81243e42012-11-20 21:21:40 -06001522IRQCHIP_DECLARE(msm_8660_qgic, "qcom,msm-8660-qgic", gic_of_init);
1523IRQCHIP_DECLARE(msm_qgic2, "qcom,msm-qgic2", gic_of_init);
Geert Uytterhoeven8709b9e2015-09-14 22:06:43 +02001524IRQCHIP_DECLARE(pl390, "arm,pl390", gic_of_init);
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001525
1526#ifdef CONFIG_ACPI
Julien Grallbafa9192016-04-11 16:32:53 +01001527static struct
1528{
1529 phys_addr_t cpu_phys_base;
Julien Grall502d6df2016-04-11 16:32:54 +01001530 u32 maint_irq;
1531 int maint_irq_mode;
1532 phys_addr_t vctrl_base;
1533 phys_addr_t vcpu_base;
Julien Grallbafa9192016-04-11 16:32:53 +01001534} acpi_data __initdata;
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001535
1536static int __init
Keith Busch60574d12019-03-11 14:55:57 -06001537gic_acpi_parse_madt_cpu(union acpi_subtable_headers *header,
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001538 const unsigned long end)
1539{
1540 struct acpi_madt_generic_interrupt *processor;
1541 phys_addr_t gic_cpu_base;
1542 static int cpu_base_assigned;
1543
1544 processor = (struct acpi_madt_generic_interrupt *)header;
1545
Al Stone99e3e3a2015-07-06 17:16:48 -06001546 if (BAD_MADT_GICC_ENTRY(processor, end))
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001547 return -EINVAL;
1548
1549 /*
1550 * There is no support for non-banked GICv1/2 register in ACPI spec.
1551 * All CPU interface addresses have to be the same.
1552 */
1553 gic_cpu_base = processor->base_address;
Julien Grallbafa9192016-04-11 16:32:53 +01001554 if (cpu_base_assigned && gic_cpu_base != acpi_data.cpu_phys_base)
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001555 return -EINVAL;
1556
Julien Grallbafa9192016-04-11 16:32:53 +01001557 acpi_data.cpu_phys_base = gic_cpu_base;
Julien Grall502d6df2016-04-11 16:32:54 +01001558 acpi_data.maint_irq = processor->vgic_interrupt;
1559 acpi_data.maint_irq_mode = (processor->flags & ACPI_MADT_VGIC_IRQ_MODE) ?
1560 ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;
1561 acpi_data.vctrl_base = processor->gich_base_address;
1562 acpi_data.vcpu_base = processor->gicv_base_address;
1563
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001564 cpu_base_assigned = 1;
1565 return 0;
1566}
1567
Marc Zyngierf26527b2015-09-28 15:49:14 +01001568/* The things you have to do to just *count* something... */
Keith Busch60574d12019-03-11 14:55:57 -06001569static int __init acpi_dummy_func(union acpi_subtable_headers *header,
Marc Zyngierf26527b2015-09-28 15:49:14 +01001570 const unsigned long end)
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001571{
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001572 return 0;
1573}
1574
Marc Zyngierf26527b2015-09-28 15:49:14 +01001575static bool __init acpi_gic_redist_is_present(void)
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001576{
Marc Zyngierf26527b2015-09-28 15:49:14 +01001577 return acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR,
1578 acpi_dummy_func, 0) > 0;
1579}
1580
1581static bool __init gic_validate_dist(struct acpi_subtable_header *header,
1582 struct acpi_probe_entry *ape)
1583{
1584 struct acpi_madt_generic_distributor *dist;
1585 dist = (struct acpi_madt_generic_distributor *)header;
1586
1587 return (dist->version == ape->driver_data &&
1588 (dist->version != ACPI_MADT_GIC_VERSION_NONE ||
1589 !acpi_gic_redist_is_present()));
1590}
1591
1592#define ACPI_GICV2_DIST_MEM_SIZE (SZ_4K)
1593#define ACPI_GIC_CPU_IF_MEM_SIZE (SZ_8K)
Julien Grall502d6df2016-04-11 16:32:54 +01001594#define ACPI_GICV2_VCTRL_MEM_SIZE (SZ_4K)
1595#define ACPI_GICV2_VCPU_MEM_SIZE (SZ_8K)
1596
1597static void __init gic_acpi_setup_kvm_info(void)
1598{
1599 int irq;
1600 struct resource *vctrl_res = &gic_v2_kvm_info.vctrl;
1601 struct resource *vcpu_res = &gic_v2_kvm_info.vcpu;
1602
1603 gic_v2_kvm_info.type = GIC_V2;
1604
1605 if (!acpi_data.vctrl_base)
1606 return;
1607
1608 vctrl_res->flags = IORESOURCE_MEM;
1609 vctrl_res->start = acpi_data.vctrl_base;
1610 vctrl_res->end = vctrl_res->start + ACPI_GICV2_VCTRL_MEM_SIZE - 1;
1611
1612 if (!acpi_data.vcpu_base)
1613 return;
1614
1615 vcpu_res->flags = IORESOURCE_MEM;
1616 vcpu_res->start = acpi_data.vcpu_base;
1617 vcpu_res->end = vcpu_res->start + ACPI_GICV2_VCPU_MEM_SIZE - 1;
1618
1619 irq = acpi_register_gsi(NULL, acpi_data.maint_irq,
1620 acpi_data.maint_irq_mode,
1621 ACPI_ACTIVE_HIGH);
1622 if (irq <= 0)
1623 return;
1624
1625 gic_v2_kvm_info.maint_irq = irq;
1626
Marc Zyngier0e5cb7772021-02-27 10:23:45 +00001627 vgic_set_kvm_info(&gic_v2_kvm_info);
Julien Grall502d6df2016-04-11 16:32:54 +01001628}
Marc Zyngierf26527b2015-09-28 15:49:14 +01001629
Marc Zyngier7327b162022-07-20 18:51:21 +08001630static struct fwnode_handle *gsi_domain_handle;
1631
1632static struct fwnode_handle *gic_v2_get_gsi_domain_id(u32 gsi)
1633{
1634 return gsi_domain_handle;
1635}
1636
Oscar Carteraba3c7e2020-05-30 16:34:29 +02001637static int __init gic_v2_acpi_init(union acpi_subtable_headers *header,
Marc Zyngierf26527b2015-09-28 15:49:14 +01001638 const unsigned long end)
1639{
1640 struct acpi_madt_generic_distributor *dist;
Jon Hunterf673b9b2016-05-10 16:14:44 +01001641 struct gic_chip_data *gic = &gic_data[0];
Jon Hunterdc9722c2016-05-10 16:14:42 +01001642 int count, ret;
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001643
1644 /* Collect CPU base addresses */
Marc Zyngierf26527b2015-09-28 15:49:14 +01001645 count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
1646 gic_acpi_parse_madt_cpu, 0);
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001647 if (count <= 0) {
1648 pr_err("No valid GICC entries exist\n");
1649 return -EINVAL;
1650 }
1651
Linus Torvalds7beaa242016-05-19 11:27:09 -07001652 gic->raw_cpu_base = ioremap(acpi_data.cpu_phys_base, ACPI_GIC_CPU_IF_MEM_SIZE);
Jon Hunterf673b9b2016-05-10 16:14:44 +01001653 if (!gic->raw_cpu_base) {
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001654 pr_err("Unable to map GICC registers\n");
1655 return -ENOMEM;
1656 }
1657
Marc Zyngierf26527b2015-09-28 15:49:14 +01001658 dist = (struct acpi_madt_generic_distributor *)header;
Jon Hunterf673b9b2016-05-10 16:14:44 +01001659 gic->raw_dist_base = ioremap(dist->base_address,
1660 ACPI_GICV2_DIST_MEM_SIZE);
1661 if (!gic->raw_dist_base) {
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001662 pr_err("Unable to map GICD registers\n");
Jon Hunterd6490462016-05-10 16:14:45 +01001663 gic_teardown(gic);
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001664 return -ENOMEM;
1665 }
1666
1667 /*
Marc Zyngier0b996fd2015-08-26 17:00:44 +01001668 * Disable split EOI/Deactivate if HYP is not available. ACPI
1669 * guarantees that we'll always have a GICv2, so the CPU
1670 * interface will always be the right size.
1671 */
1672 if (!is_hyp_mode_available())
Davidlohr Buesod01d3272018-03-26 14:09:25 -07001673 static_branch_disable(&supports_deactivate_key);
Marc Zyngier0b996fd2015-08-26 17:00:44 +01001674
1675 /*
Marc Zyngier891ae762015-10-13 12:51:40 +01001676 * Initialize GIC instance zero (no multi-GIC support).
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001677 */
Marc Zyngier7327b162022-07-20 18:51:21 +08001678 gsi_domain_handle = irq_domain_alloc_fwnode(&dist->base_address);
1679 if (!gsi_domain_handle) {
Marc Zyngier891ae762015-10-13 12:51:40 +01001680 pr_err("Unable to allocate domain handle\n");
Jon Hunterd6490462016-05-10 16:14:45 +01001681 gic_teardown(gic);
Marc Zyngier891ae762015-10-13 12:51:40 +01001682 return -ENOMEM;
1683 }
Lorenzo Pieralisid8f4f162015-03-24 17:58:51 +00001684
Marc Zyngier7327b162022-07-20 18:51:21 +08001685 ret = __gic_init_bases(gic, gsi_domain_handle);
Jon Hunterdc9722c2016-05-10 16:14:42 +01001686 if (ret) {
1687 pr_err("Failed to initialise GIC\n");
Marc Zyngier7327b162022-07-20 18:51:21 +08001688 irq_domain_free_fwnode(gsi_domain_handle);
Jon Hunterd6490462016-05-10 16:14:45 +01001689 gic_teardown(gic);
Jon Hunterdc9722c2016-05-10 16:14:42 +01001690 return ret;
1691 }
Marc Zyngier891ae762015-10-13 12:51:40 +01001692
Marc Zyngier7327b162022-07-20 18:51:21 +08001693 acpi_set_irq_model(ACPI_IRQ_MODEL_GIC, gic_v2_get_gsi_domain_id);
Suravee Suthikulpanit0644b3d2015-12-10 08:55:30 -08001694
1695 if (IS_ENABLED(CONFIG_ARM_GIC_V2M))
1696 gicv2m_init(NULL, gic_data[0].domain);
1697
Davidlohr Buesod01d3272018-03-26 14:09:25 -07001698 if (static_branch_likely(&supports_deactivate_key))
Christoffer Dalld33a3c82016-12-06 22:00:52 +01001699 gic_acpi_setup_kvm_info();
Julien Grall502d6df2016-04-11 16:32:54 +01001700
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001701 return 0;
1702}
Marc Zyngierf26527b2015-09-28 15:49:14 +01001703IRQCHIP_ACPI_DECLARE(gic_v2, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
1704 gic_validate_dist, ACPI_MADT_GIC_VERSION_V2,
1705 gic_v2_acpi_init);
1706IRQCHIP_ACPI_DECLARE(gic_v2_maybe, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,
1707 gic_validate_dist, ACPI_MADT_GIC_VERSION_NONE,
1708 gic_v2_acpi_init);
Tomasz Nowickid60fc382015-03-24 14:02:49 +00001709#endif