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Message-ID: <20230428103622.18291-6-yi-de.wu@mediatek.com>
Date: Fri, 28 Apr 2023 18:36:20 +0800
From: Yi-De Wu <yi-de.wu@...iatek.com>
To: Yingshiuan Pan <yingshiuan.pan@...iatek.com>,
Ze-Yu Wang <ze-yu.wang@...iatek.com>,
Yi-De Wu <yi-de.wu@...iatek.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Jonathan Corbet <corbet@....net>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-doc@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-arch@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>,
"David Bradil" <dbrazdil@...gle.com>,
Trilok Soni <quic_tsoni@...cinc.com>,
Jade Shih <jades.shih@...iatek.com>,
Miles Chen <miles.chen@...iatek.com>,
Ivan Tseng <ivan.tseng@...iatek.com>,
My Chuang <my.chuang@...iatek.com>,
Shawn Hsiao <shawn.hsiao@...iatek.com>,
PeiLun Suei <peilun.suei@...iatek.com>,
Liju Chen <liju-clr.chen@...iatek.com>
Subject: [PATCH v2 5/7] virt: geniezone: Add irqchip support for virtual interrupt injection
From: "Yingshiuan Pan" <yingshiuan.pan@...iatek.com>
Enable GenieZone to handle virtual interrupt injection request.
Signed-off-by: Yingshiuan Pan <yingshiuan.pan@...iatek.com>
Signed-off-by: Yi-De Wu <yi-de.wu@...iatek.com>
---
arch/arm64/geniezone/Makefile | 2 +-
arch/arm64/geniezone/gzvm_arch.c | 24 ++++++--
arch/arm64/geniezone/gzvm_arch.h | 11 ++++
arch/arm64/geniezone/gzvm_irqchip.c | 88 +++++++++++++++++++++++++++++
drivers/virt/geniezone/gzvm_vm.c | 75 ++++++++++++++++++++++++
include/linux/gzvm_drv.h | 4 ++
include/uapi/linux/gzvm.h | 38 ++++++++++++-
7 files changed, 235 insertions(+), 7 deletions(-)
create mode 100644 arch/arm64/geniezone/gzvm_irqchip.c
diff --git a/arch/arm64/geniezone/Makefile b/arch/arm64/geniezone/Makefile
index 5720c076d73c..82af1ed870bc 100644
--- a/arch/arm64/geniezone/Makefile
+++ b/arch/arm64/geniezone/Makefile
@@ -4,6 +4,6 @@
#
include $(srctree)/drivers/virt/geniezone/Makefile
-gzvm-y += gzvm_arch.o
+gzvm-y += gzvm_arch.o gzvm_irqchip.o
obj-$(CONFIG_MTK_GZVM) += gzvm.o
diff --git a/arch/arm64/geniezone/gzvm_arch.c b/arch/arm64/geniezone/gzvm_arch.c
index 3c91f3f1ae50..16ab5d4fd5b8 100644
--- a/arch/arm64/geniezone/gzvm_arch.c
+++ b/arch/arm64/geniezone/gzvm_arch.c
@@ -16,11 +16,10 @@
*
* Return: The wrapper helps caller to convert geniezone errno to Linux errno.
*/
-static int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1,
- unsigned long a2, unsigned long a3,
- unsigned long a4, unsigned long a5,
- unsigned long a6, unsigned long a7,
- struct arm_smccc_res *res)
+int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, unsigned long a2,
+ unsigned long a3, unsigned long a4, unsigned long a5,
+ unsigned long a6, unsigned long a7,
+ struct arm_smccc_res *res)
{
arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
return gz_err_to_errno(res->a0);
@@ -259,3 +258,18 @@ int gzvm_arch_create_vcpu(gzvm_id_t vm_id, int vcpuid, void *run)
return ret;
}
+
+int gzvm_arch_create_device(gzvm_id_t vm_id, struct gzvm_create_device *gzvm_dev)
+{
+ struct arm_smccc_res res;
+
+ return gzvm_hypcall_wrapper(MT_HVC_GZVM_CREATE_DEVICE, vm_id,
+ virt_to_phys(gzvm_dev), 0, 0, 0, 0, 0, &res);
+}
+
+int gzvm_arch_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, u32 irq_type,
+ u32 irq, bool level)
+{
+ /* default use spi */
+ return gzvm_vgic_inject_spi(gzvm, vcpu_idx, irq, level);
+}
diff --git a/arch/arm64/geniezone/gzvm_arch.h b/arch/arm64/geniezone/gzvm_arch.h
index ecc24ff4e244..205bd0901333 100644
--- a/arch/arm64/geniezone/gzvm_arch.h
+++ b/arch/arm64/geniezone/gzvm_arch.h
@@ -71,4 +71,15 @@ disassemble_vm_vcpu_tuple(unsigned int tuple, gzvm_id_t *vmid,
*vcpuid = get_vcpuid_from_tuple(tuple);
}
+int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, unsigned long a2,
+ unsigned long a3, unsigned long a4, unsigned long a5,
+ unsigned long a6, unsigned long a7,
+ struct arm_smccc_res *res);
+
+void gzvm_sync_vgic_state(struct gzvm_vcpu *vcpu);
+int gzvm_vgic_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, u32 irq_type,
+ u32 irq, bool level);
+int gzvm_vgic_inject_spi(struct gzvm *gzvm, unsigned int vcpu_idx,
+ u32 spi_irq, bool level);
+
#endif /* __GZVM_ARCH_H__ */
diff --git a/arch/arm64/geniezone/gzvm_irqchip.c b/arch/arm64/geniezone/gzvm_irqchip.c
new file mode 100644
index 000000000000..c46bd34fee1b
--- /dev/null
+++ b/arch/arm64/geniezone/gzvm_irqchip.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ */
+
+#include <linux/irqchip/arm-gic-v3.h>
+#include <kvm/arm_vgic.h>
+
+#include <linux/gzvm.h>
+#include <linux/gzvm_drv.h>
+#include "gzvm_arch.h"
+
+/**
+ * gzvm_sync_vgic_state() - Check all LRs synced from gz hypervisor
+ *
+ * Traverse all LRs, see if any EOIed vint, notify_acked_irq if any.
+ * GZ does not fold/unfold everytime KVM_RUN, so we have to traverse all saved
+ * LRs. It will not takes much more time comparing to fold/unfold everytime
+ * GZVM_RUN, because there are only few LRs.
+ */
+void gzvm_sync_vgic_state(struct gzvm_vcpu *vcpu)
+{
+}
+
+/* is_irq_valid() - Check the irq number and irq_type are matched */
+static bool is_irq_valid(u32 irq, u32 irq_type)
+{
+ switch (irq_type) {
+ case GZVM_IRQ_TYPE_CPU:
+ /* 0 ~ 15: SGI */
+ if (likely(irq <= GZVM_IRQ_CPU_FIQ))
+ return true;
+ break;
+ case GZVM_IRQ_TYPE_PPI:
+ /* 16 ~ 31: PPI */
+ if (likely(irq >= VGIC_NR_SGIS && irq < VGIC_NR_PRIVATE_IRQS))
+ return true;
+ break;
+ case GZVM_IRQ_TYPE_SPI:
+ /* 32 ~ : SPT */
+ if (likely(irq >= VGIC_NR_PRIVATE_IRQS))
+ return true;
+ break;
+ default:
+ return false;
+ }
+ return false;
+}
+
+/**
+ * gzvm_vgic_inject_irq() - Inject virtual interrupt to a VM
+ * @vcpu_idx: vcpu index, only valid if PPI
+ * @irq: irq number
+ * @level: 1 if true else 0
+ */
+int gzvm_vgic_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, u32 irq_type,
+ u32 irq, bool level)
+{
+ unsigned long a1 = assemble_vm_vcpu_tuple(gzvm->vm_id, vcpu_idx);
+ struct arm_smccc_res res;
+
+ if (!unlikely(is_irq_valid(irq, irq_type)))
+ return -EINVAL;
+
+ gzvm_hypcall_wrapper(MT_HVC_GZVM_IRQ_LINE, a1, irq, level,
+ 0, 0, 0, 0, &res);
+ if (res.a0) {
+ pr_err("Failed to set IRQ level (%d) to irq#%u on vcpu %d with ret=%d\n",
+ level, irq, vcpu_idx, (int)res.a0);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+/**
+ * gzvm_vgic_inject_spi() - Inject virtual spi interrupt
+ *
+ * @spi_irq: This is spi interrupt number (starts from 0 instead of 32)
+ *
+ * Return 0 if succeed else other negative values indicating each errors
+ */
+int gzvm_vgic_inject_spi(struct gzvm *gzvm, unsigned int vcpu_idx,
+ u32 spi_irq, bool level)
+{
+ return gzvm_vgic_inject_irq(gzvm, 0, GZVM_IRQ_TYPE_SPI,
+ spi_irq + VGIC_NR_PRIVATE_IRQS, level);
+}
diff --git a/drivers/virt/geniezone/gzvm_vm.c b/drivers/virt/geniezone/gzvm_vm.c
index 5542065e82c6..a5444541b745 100644
--- a/drivers/virt/geniezone/gzvm_vm.c
+++ b/drivers/virt/geniezone/gzvm_vm.c
@@ -186,6 +186,67 @@ gzvm_vm_ioctl_set_memory_region(struct gzvm *gzvm,
return register_memslot_addr_range(gzvm, memslot);
}
+static int gzvm_vm_ioctl_irq_line(struct gzvm *gzvm,
+ struct gzvm_irq_level *irq_level)
+{
+ u32 irq = irq_level->irq;
+ unsigned int irq_type, vcpu_idx, irq_num;
+ bool level = irq_level->level;
+
+ irq_type = (irq >> GZVM_IRQ_TYPE_SHIFT) & GZVM_IRQ_TYPE_MASK;
+ vcpu_idx = (irq >> GZVM_IRQ_VCPU_SHIFT) & GZVM_IRQ_VCPU_MASK;
+ vcpu_idx += ((irq >> GZVM_IRQ_VCPU2_SHIFT) & GZVM_IRQ_VCPU2_MASK) *
+ (GZVM_IRQ_VCPU_MASK + 1);
+ irq_num = (irq >> GZVM_IRQ_NUM_SHIFT) & GZVM_IRQ_NUM_MASK;
+
+ return gzvm_arch_inject_irq(gzvm, vcpu_idx, irq_num, irq_type, level);
+}
+
+static int gzvm_vm_ioctl_create_device(struct gzvm *gzvm, void __user *argp)
+{
+ struct gzvm_create_device *gzvm_dev;
+ void *dev_data = NULL;
+ int ret;
+
+ gzvm_dev = (struct gzvm_create_device *)alloc_pages_exact(PAGE_SIZE,
+ GFP_KERNEL);
+ if (!gzvm_dev)
+ return -ENOMEM;
+ if (copy_from_user(gzvm_dev, argp, sizeof(*gzvm_dev))) {
+ ret = -EFAULT;
+ goto err_free_dev;
+ }
+
+ if (gzvm_dev->attr_addr != 0 && gzvm_dev->attr_size != 0) {
+ size_t attr_size = gzvm_dev->attr_size;
+ void __user *attr_addr = (void __user *)gzvm_dev->attr_addr;
+
+ /* Size of device specific data should not be over a page. */
+ if (attr_size > PAGE_SIZE)
+ return -EINVAL;
+
+ dev_data = alloc_pages_exact(attr_size, GFP_KERNEL);
+ if (!dev_data) {
+ ret = -ENOMEM;
+ goto err_free_dev;
+ }
+
+ if (copy_from_user(dev_data, attr_addr, attr_size)) {
+ ret = -EFAULT;
+ goto err_free_dev_data;
+ }
+ gzvm_dev->attr_addr = virt_to_phys(dev_data);
+ }
+
+ ret = gzvm_arch_create_device(gzvm->vm_id, gzvm_dev);
+err_free_dev_data:
+ if (dev_data)
+ free_pages_exact(dev_data, 0);
+err_free_dev:
+ free_pages_exact(gzvm_dev, 0);
+ return ret;
+}
+
static int gzvm_vm_ioctl_enable_cap(struct gzvm *gzvm,
struct gzvm_enable_cap *cap,
void __user *argp)
@@ -220,6 +281,20 @@ static long gzvm_vm_ioctl(struct file *filp, unsigned int ioctl,
ret = gzvm_vm_ioctl_set_memory_region(gzvm, &userspace_mem);
break;
}
+ case GZVM_IRQ_LINE: {
+ struct gzvm_irq_level irq_event;
+
+ ret = -EFAULT;
+ if (copy_from_user(&irq_event, argp, sizeof(irq_event)))
+ goto out;
+
+ ret = gzvm_vm_ioctl_irq_line(gzvm, &irq_event);
+ break;
+ }
+ case GZVM_CREATE_DEVICE: {
+ ret = gzvm_vm_ioctl_create_device(gzvm, argp);
+ break;
+ }
case GZVM_ENABLE_CAP: {
struct gzvm_enable_cap cap;
diff --git a/include/linux/gzvm_drv.h b/include/linux/gzvm_drv.h
index 5736ddf97741..1e7c81597e9a 100644
--- a/include/linux/gzvm_drv.h
+++ b/include/linux/gzvm_drv.h
@@ -107,6 +107,10 @@ int gzvm_arch_create_vcpu(gzvm_id_t vm_id, int vcpuid, void *run);
int gzvm_arch_vcpu_run(struct gzvm_vcpu *vcpu, __u64 *exit_reason);
int gzvm_arch_destroy_vcpu(gzvm_id_t vm_id, int vcpuid);
+int gzvm_arch_create_device(gzvm_id_t vm_id, struct gzvm_create_device *gzvm_dev);
+int gzvm_arch_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, u32 irq_type,
+ u32 irq, bool level);
+
extern struct platform_device *gzvm_debug_dev;
#endif /* __GZVM_DRV_H__ */
diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h
index 6462961299eb..2f56a53efb27 100644
--- a/include/uapi/linux/gzvm.h
+++ b/include/uapi/linux/gzvm.h
@@ -87,7 +87,43 @@ struct gzvm_userspace_memory_region {
#define GZVM_IRQ_CPU_IRQ 0
#define GZVM_IRQ_CPU_FIQ 1
-/* ioctls for vcpu fds */
+struct gzvm_irq_level {
+ union {
+ __u32 irq;
+ __s32 status;
+ };
+ __u32 level;
+};
+
+#define GZVM_IRQ_LINE _IOW(GZVM_IOC_MAGIC, 0x61, \
+ struct gzvm_irq_level)
+
+enum gzvm_device_type {
+ GZVM_DEV_TYPE_ARM_VGIC_V3_DIST,
+ GZVM_DEV_TYPE_ARM_VGIC_V3_REDIST,
+ GZVM_DEV_TYPE_MAX,
+};
+
+struct gzvm_create_device {
+ __u32 dev_type; /* device type */
+ __u32 id; /* out: device id */
+ __u64 flags; /* device specific flags */
+ __u64 dev_addr; /* device ipa address in VM's view */
+ __u64 dev_reg_size; /* device register range size */
+ /*
+ * If user -> kernel, this is user virtual address of device specific
+ * attributes (if needed). If kernel->hypervisor, this is ipa.
+ */
+ __u64 attr_addr;
+ __u64 attr_size; /* size of device specific attributes */
+};
+
+#define GZVM_CREATE_DEVICE _IOWR(GZVM_IOC_MAGIC, 0xe0, \
+ struct gzvm_create_device)
+
+/*
+ * ioctls for vcpu fds
+ */
#define GZVM_RUN _IO(GZVM_IOC_MAGIC, 0x80)
/* VM exit reason */
--
2.18.0
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