From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/irqchip/irq-gic-v4.c | 171 ++++++++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 152 insertions(+), 19 deletions(-)
diff --git a/kernel/drivers/irqchip/irq-gic-v4.c b/kernel/drivers/irqchip/irq-gic-v4.c
index dba9d67..5d1dc99 100644
--- a/kernel/drivers/irqchip/irq-gic-v4.c
+++ b/kernel/drivers/irqchip/irq-gic-v4.c
@@ -1,18 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2016,2017 ARM Limited, All Rights Reserved.
* Author: Marc Zyngier <marc.zyngier@arm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/interrupt.h>
@@ -96,6 +85,53 @@
static struct irq_domain *gic_domain;
static const struct irq_domain_ops *vpe_domain_ops;
+static const struct irq_domain_ops *sgi_domain_ops;
+
+static bool has_v4_1(void)
+{
+ return !!sgi_domain_ops;
+}
+
+static int its_alloc_vcpu_sgis(struct its_vpe *vpe, int idx)
+{
+ char *name;
+ int sgi_base;
+
+ if (!has_v4_1())
+ return 0;
+
+ name = kasprintf(GFP_KERNEL, "GICv4-sgi-%d", task_pid_nr(current));
+ if (!name)
+ goto err;
+
+ vpe->fwnode = irq_domain_alloc_named_id_fwnode(name, idx);
+ if (!vpe->fwnode)
+ goto err;
+
+ kfree(name);
+ name = NULL;
+
+ vpe->sgi_domain = irq_domain_create_linear(vpe->fwnode, 16,
+ sgi_domain_ops, vpe);
+ if (!vpe->sgi_domain)
+ goto err;
+
+ sgi_base = __irq_domain_alloc_irqs(vpe->sgi_domain, -1, 16,
+ NUMA_NO_NODE, vpe,
+ false, NULL);
+ if (sgi_base <= 0)
+ goto err;
+
+ return 0;
+
+err:
+ if (vpe->sgi_domain)
+ irq_domain_remove(vpe->sgi_domain);
+ if (vpe->fwnode)
+ irq_domain_free_fwnode(vpe->fwnode);
+ kfree(name);
+ return -ENOMEM;
+}
int its_alloc_vcpu_irqs(struct its_vm *vm)
{
@@ -123,8 +159,13 @@
if (vpe_base_irq <= 0)
goto err;
- for (i = 0; i < vm->nr_vpes; i++)
+ for (i = 0; i < vm->nr_vpes; i++) {
+ int ret;
vm->vpes[i]->irq = vpe_base_irq + i;
+ ret = its_alloc_vcpu_sgis(vm->vpes[i], i);
+ if (ret)
+ goto err;
+ }
return 0;
@@ -137,8 +178,28 @@
return -ENOMEM;
}
+static void its_free_sgi_irqs(struct its_vm *vm)
+{
+ int i;
+
+ if (!has_v4_1())
+ return;
+
+ for (i = 0; i < vm->nr_vpes; i++) {
+ unsigned int irq = irq_find_mapping(vm->vpes[i]->sgi_domain, 0);
+
+ if (WARN_ON(!irq))
+ continue;
+
+ irq_domain_free_irqs(irq, 16);
+ irq_domain_remove(vm->vpes[i]->sgi_domain);
+ irq_domain_free_fwnode(vm->vpes[i]->fwnode);
+ }
+}
+
void its_free_vcpu_irqs(struct its_vm *vm)
{
+ its_free_sgi_irqs(vm);
irq_domain_free_irqs(vm->vpes[0]->irq, vm->nr_vpes);
irq_domain_remove(vm->domain);
irq_domain_free_fwnode(vm->fwnode);
@@ -149,16 +210,72 @@
return irq_set_vcpu_affinity(vpe->irq, info);
}
-int its_schedule_vpe(struct its_vpe *vpe, bool on)
+int its_make_vpe_non_resident(struct its_vpe *vpe, bool db)
{
- struct its_cmd_info info;
+ struct irq_desc *desc = irq_to_desc(vpe->irq);
+ struct its_cmd_info info = { };
+ int ret;
WARN_ON(preemptible());
- info.cmd_type = on ? SCHEDULE_VPE : DESCHEDULE_VPE;
+ info.cmd_type = DESCHEDULE_VPE;
+ if (has_v4_1()) {
+ /* GICv4.1 can directly deal with doorbells */
+ info.req_db = db;
+ } else {
+ /* Undo the nested disable_irq() calls... */
+ while (db && irqd_irq_disabled(&desc->irq_data))
+ enable_irq(vpe->irq);
+ }
- return its_send_vpe_cmd(vpe, &info);
+ ret = its_send_vpe_cmd(vpe, &info);
+ if (!ret)
+ vpe->resident = false;
+
+ vpe->ready = false;
+
+ return ret;
}
+
+int its_make_vpe_resident(struct its_vpe *vpe, bool g0en, bool g1en)
+{
+ struct its_cmd_info info = { };
+ int ret;
+
+ WARN_ON(preemptible());
+
+ info.cmd_type = SCHEDULE_VPE;
+ if (has_v4_1()) {
+ info.g0en = g0en;
+ info.g1en = g1en;
+ } else {
+ /* Disabled the doorbell, as we're about to enter the guest */
+ disable_irq_nosync(vpe->irq);
+ }
+
+ ret = its_send_vpe_cmd(vpe, &info);
+ if (!ret)
+ vpe->resident = true;
+
+ return ret;
+}
+
+int its_commit_vpe(struct its_vpe *vpe)
+{
+ struct its_cmd_info info = {
+ .cmd_type = COMMIT_VPE,
+ };
+ int ret;
+
+ WARN_ON(preemptible());
+
+ ret = its_send_vpe_cmd(vpe, &info);
+ if (!ret)
+ vpe->ready = true;
+
+ return ret;
+}
+
int its_invall_vpe(struct its_vpe *vpe)
{
@@ -222,12 +339,28 @@
return irq_set_vcpu_affinity(irq, &info);
}
-int its_init_v4(struct irq_domain *domain, const struct irq_domain_ops *ops)
+int its_prop_update_vsgi(int irq, u8 priority, bool group)
+{
+ struct its_cmd_info info = {
+ .cmd_type = PROP_UPDATE_VSGI,
+ {
+ .priority = priority,
+ .group = group,
+ },
+ };
+
+ return irq_set_vcpu_affinity(irq, &info);
+}
+
+int its_init_v4(struct irq_domain *domain,
+ const struct irq_domain_ops *vpe_ops,
+ const struct irq_domain_ops *sgi_ops)
{
if (domain) {
pr_info("ITS: Enabling GICv4 support\n");
gic_domain = domain;
- vpe_domain_ops = ops;
+ vpe_domain_ops = vpe_ops;
+ sgi_domain_ops = sgi_ops;
return 0;
}
--
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