[PATCH v4 8/9] virt: geniezone: Add dtb config support
From: Yi-De Wu <hidden>
Date: 2023-06-09 08:53:29
Also in:
linux-arch, linux-doc, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
From: "Jerry Wang" <redacted> Hypervisor might need to know the accurate address and size of dtb passed from userspace. And then hypervisor would parse the dtb and get vm information. Signed-off-by: Jerry Wang <redacted> Signed-off-by: Liju-clr Chen <redacted> Signed-off-by: Yi-De Wu <redacted> --- arch/arm64/geniezone/gzvm_arch_common.h | 2 ++ arch/arm64/geniezone/vm.c | 8 ++++++++ drivers/virt/geniezone/gzvm_vm.c | 8 ++++++++ include/linux/gzvm_drv.h | 1 + include/uapi/linux/gzvm.h | 10 ++++++++++ 5 files changed, 29 insertions(+)
diff --git a/arch/arm64/geniezone/gzvm_arch_common.h b/arch/arm64/geniezone/gzvm_arch_common.h
index 5cfeb4df84c5..ccd2a7516eeb 100644
--- a/arch/arm64/geniezone/gzvm_arch_common.h
+++ b/arch/arm64/geniezone/gzvm_arch_common.h@@ -24,6 +24,7 @@ enum { GZVM_FUNC_PROBE, GZVM_FUNC_ENABLE_CAP, GZVM_FUNC_MEMREGION_PURPOSE, + GZVM_FUNC_SET_DTB_CONFIG, NR_GZVM_FUNC };
@@ -48,6 +49,7 @@ enum { #define MT_HVC_GZVM_PROBE GZVM_HCALL_ID(GZVM_FUNC_PROBE) #define MT_HVC_GZVM_ENABLE_CAP GZVM_HCALL_ID(GZVM_FUNC_ENABLE_CAP) #define MT_HVC_GZVM_MEMREGION_PURPOSE GZVM_HCALL_ID(GZVM_FUNC_MEMREGION_PURPOSE) +#define MT_HVC_GZVM_SET_DTB_CONFIG GZVM_HCALL_ID(GZVM_FUNC_SET_DTB_CONFIG) #define GIC_V3_NR_LRS 16 /**
diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c
index e19a66d6a75d..6062fe85c70e 100644
--- a/arch/arm64/geniezone/vm.c
+++ b/arch/arm64/geniezone/vm.c@@ -106,6 +106,14 @@ int gzvm_arch_memregion_purpose(struct gzvm *gzvm, struct gzvm_userspace_memory_ mem->flags, 0, 0, 0, &res); } +int gzvm_arch_set_dtb_config(struct gzvm *gzvm, struct gzvm_dtb_config *cfg) +{ + struct arm_smccc_res res; + + return gzvm_hypcall_wrapper(MT_HVC_GZVM_SET_DTB_CONFIG, gzvm->vm_id, cfg->dtb_addr, + cfg->dtb_size, 0, 0, 0, 0, &res); +} + static int gzvm_vm_arch_enable_cap(struct gzvm *gzvm, struct gzvm_enable_cap *cap, struct arm_smccc_res *res) {
diff --git a/drivers/virt/geniezone/gzvm_vm.c b/drivers/virt/geniezone/gzvm_vm.c
index 3b1cb715ef34..d379793deace 100644
--- a/drivers/virt/geniezone/gzvm_vm.c
+++ b/drivers/virt/geniezone/gzvm_vm.c@@ -390,6 +390,14 @@ static long gzvm_vm_ioctl(struct file *filp, unsigned int ioctl, ret = gzvm_vm_ioctl_enable_cap(gzvm, &cap, argp); break; } + case GZVM_SET_DTB_CONFIG: { + struct gzvm_dtb_config cfg; + + if (copy_from_user(&cfg, argp, sizeof(cfg))) + goto out; + ret = gzvm_arch_set_dtb_config(gzvm, &cfg); + break; + } default: ret = -ENOTTY; }
diff --git a/include/linux/gzvm_drv.h b/include/linux/gzvm_drv.h
index 288a339bf382..e920397e83d3 100644
--- a/include/linux/gzvm_drv.h
+++ b/include/linux/gzvm_drv.h@@ -146,6 +146,7 @@ void gzvm_sync_hwstate(struct gzvm_vcpu *vcpu); extern struct miscdevice *gzvm_debug_dev; int gzvm_arch_memregion_purpose(struct gzvm *gzvm, struct gzvm_userspace_memory_region *mem); +int gzvm_arch_set_dtb_config(struct gzvm *gzvm, struct gzvm_dtb_config *args); int gzvm_init_ioeventfd(struct gzvm *gzvm); int gzvm_ioeventfd(struct gzvm *gzvm, struct gzvm_ioeventfd *args);
diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h
index 2af1b068947c..28354c17ed9c 100644
--- a/include/uapi/linux/gzvm.h
+++ b/include/uapi/linux/gzvm.h@@ -265,4 +265,14 @@ struct gzvm_ioeventfd { #define GZVM_IOEVENTFD _IOW(GZVM_IOC_MAGIC, 0x79, struct gzvm_ioeventfd) +struct gzvm_dtb_config { + /* dtb address set by VMM (guset memory) */ + __u64 dtb_addr; + /* dtb size */ + __u64 dtb_size; +}; + +#define GZVM_SET_DTB_CONFIG _IOW(GZVM_IOC_MAGIC, 0xff, \ + struct gzvm_dtb_config) + #endif /* __GZVM_H__ */
--
2.18.0
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