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FROMLIST: virt: geniezone: Add dtb config support

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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.

Change-Id: I23194d45f5c60555ba7fde9dd8d393443fd41310
Signed-off-by: Jerry Wang <ze-yu.wang@mediatek.com>
Signed-off-by: Liju-clr Chen <liju-clr.chen@mediatek.com>
Signed-off-by: Yi-De Wu <yi-de.wu@mediatek.com>
Bug: 280363874
Link: https://lore.kernel.org/lkml/20230727080005.14474-10-yi-de.wu@mediatek.com/
This commit is contained in:
Yi-De Wu 2023-06-01 15:15:15 +08:00 committed by Ramji Jiyani
parent 39bd65ec1d
commit 3e079b7691
5 changed files with 36 additions and 0 deletions
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2
arch/arm64/geniezone/gzvm_arch_common.h
View File

@ -23,6 +23,7 @@ enum {
GZVM_FUNC_ENABLE_CAP = 13,
GZVM_FUNC_INFORM_EXIT = 14,
GZVM_FUNC_MEMREGION_PURPOSE = 15,
GZVM_FUNC_SET_DTB_CONFIG = 16,
NR_GZVM_FUNC,
};
@ -46,6 +47,7 @@ enum {
#define MT_HVC_GZVM_ENABLE_CAP GZVM_HCALL_ID(GZVM_FUNC_ENABLE_CAP)
#define MT_HVC_GZVM_INFORM_EXIT GZVM_HCALL_ID(GZVM_FUNC_INFORM_EXIT)
#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

9
arch/arm64/geniezone/vm.c
View File

@ -119,6 +119,15 @@ int gzvm_arch_memregion_purpose(struct gzvm *gzvm,
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)

10
drivers/virt/geniezone/gzvm_vm.c
View File

@ -413,6 +413,16 @@ 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))) {
ret = -EFAULT;
goto out;
}
ret = gzvm_arch_set_dtb_config(gzvm, &cfg);
break;
}
default:
ret = -ENOTTY;
}

1
include/linux/gzvm_drv.h
View File

@ -144,6 +144,7 @@ void gzvm_vm_irqfd_release(struct gzvm *gzvm);
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);

14
include/uapi/linux/gzvm.h
View File

@ -326,4 +326,18 @@ struct gzvm_ioeventfd {
#define GZVM_IOEVENTFD _IOW(GZVM_IOC_MAGIC, 0x79, struct gzvm_ioeventfd)
/**
* struct gzvm_dtb_config: store address and size of dtb passed from userspace
*
* @dtb_addr: dtb address set by VMM (guset memory)
* @dtb_size: dtb size
*/
struct gzvm_dtb_config {
__u64 dtb_addr;
__u64 dtb_size;
};
#define GZVM_SET_DTB_CONFIG _IOW(GZVM_IOC_MAGIC, 0xff, \
struct gzvm_dtb_config)
#endif /* __GZVM_H__ */