linux-kernel - Re: [PATCH v11 13/26] gunyah: vm_mgr: Add ioctls to support basic non-proxy VM boot

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Message-ID: <fa073ce7-a9ef-9e8e-8791-71578a0834bc@linaro.org>
Date:   Tue, 21 Mar 2023 14:24:32 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Elliot Berman <quic_eberman@...cinc.com>,
        Alex Elder <elder@...aro.org>,
        Prakruthi Deepak Heragu <quic_pheragu@...cinc.com>
Cc:     Murali Nalajala <quic_mnalajal@...cinc.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Srivatsa Vaddagiri <quic_svaddagi@...cinc.com>,
        Carl van Schaik <quic_cvanscha@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        Will Deacon <will@...nel.org>, Andy Gross <agross@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Jassi Brar <jassisinghbrar@...il.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v11 13/26] gunyah: vm_mgr: Add ioctls to support basic
 non-proxy VM boot



On 04/03/2023 01:06, Elliot Berman wrote:
> Add remaining ioctls to support non-proxy VM boot:
> 
>   - Gunyah Resource Manager uses the VM's devicetree to configure the
>     virtual machine. The location of the devicetree in the guest's
>     virtual memory can be declared via the SET_DTB_CONFIG ioctl.
>   - Trigger start of the virtual machine with VM_START ioctl.
> 
> Co-developed-by: Prakruthi Deepak Heragu <quic_pheragu@...cinc.com>
> Signed-off-by: Prakruthi Deepak Heragu <quic_pheragu@...cinc.com>
> Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>
> ---
>   drivers/virt/gunyah/vm_mgr.c    | 243 ++++++++++++++++++++++++++++++--
>   drivers/virt/gunyah/vm_mgr.h    |  10 ++
>   drivers/virt/gunyah/vm_mgr_mm.c |  23 +++
>   include/linux/gunyah_rsc_mgr.h  |   6 +
>   include/uapi/linux/gunyah.h     |  13 ++
>   5 files changed, 282 insertions(+), 13 deletions(-)
> 

...

> diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h
> index a19207e3e065..d6abd8605a2e 100644
> --- a/include/uapi/linux/gunyah.h
> +++ b/include/uapi/linux/gunyah.h
> @@ -49,4 +49,17 @@ struct gh_userspace_memory_region {
>   #define GH_VM_SET_USER_MEM_REGION	_IOW(GH_IOCTL_TYPE, 0x1, \
>   						struct gh_userspace_memory_region)
>   
> +/**
> + * struct gh_vm_dtb_config - Set the location of the VM's devicetree blob
> + * @guest_phys_addr: Address of the VM's devicetree in guest memory.
> + * @size: Maximum size of the devicetree.
> + */
> +struct gh_vm_dtb_config {
> +	__u64 guest_phys_addr;
> +	__u64 size;
> +};
> +#define GH_VM_SET_DTB_CONFIG	_IOW(GH_IOCTL_TYPE, 0x2, struct gh_vm_dtb_config)
> +
> +#define GH_VM_START		_IO(GH_IOCTL_TYPE, 0x3)
A comment here that this is going to *ONLY* start an un-authenticated VM 
would be useful to the users.

with that fixed,

Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>


--srini


> +
>   #endif