Re: [PATCH v10 13/26] gunyah: vm_mgr: Add ioctls to support basic non-proxy VM boot

[Srivatsa Vaddagiri]

* Elliot Berman <quic_eberman@xxxxxxxxxxx> [2023-02-14 13:24:26]:

> +static int gh_vm_start(struct gh_vm *ghvm)
> +{
> +	struct gh_vm_mem *mapping;
> +	u64 dtb_offset;
> +	u32 mem_handle;
> +	int ret;
> +
> +	down_write(&ghvm->status_lock);
> +	if (ghvm->vm_status != GH_RM_VM_STATUS_LOAD) {
> +		up_write(&ghvm->status_lock);
> +		return 0;
> +	}
> +
> +	ghvm->vm_status = GH_RM_VM_STATUS_RESET;
> +
> +	list_for_each_entry(mapping, &ghvm->memory_mappings, list) {
> +		switch (mapping->share_type) {
> +		case VM_MEM_LEND:
> +			ret = gh_rm_mem_lend(ghvm->rm, &mapping->parcel);
> +			break;
> +		case VM_MEM_SHARE:
> +			ret = gh_rm_mem_share(ghvm->rm, &mapping->parcel);
> +			break;
> +		}
> +		if (ret) {
> +			pr_warn("Failed to %s parcel %d: %d\n",
> +				mapping->share_type == VM_MEM_LEND ? "lend" : "share",
> +				mapping->parcel.label,
> +				ret);
> +			goto err;
> +		}
> +	}
> +
> +	mapping = gh_vm_mem_find_mapping(ghvm, ghvm->dtb_config.gpa, ghvm->dtb_config.size);

It may be some optimization to derive DTB 'mapping' in the first loop you have
above (that lends/shares all mappings)


> +	if (!mapping) {
> +		pr_warn("Failed to find the memory_handle for DTB\n");
> +		ret = -EINVAL;
> +		goto err;
> +	}