ACK: [PATCH] UBUNTU: SAUCE: Drivers: hv: vmbus: Fix the boot issue for VBS Isolated VMs

[Marcelo Henrique Cerri]

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Acked-by: Marcelo Henrique Cerri <marcelo.cerri at canonical.com>

On Mon, Jul 11 2022, Tim Gardner wrote:
> From: Dexuan Cui <decui at microsoft.com>
>
> BugLink: https://bugs.launchpad.net/bugs/1981328
>
> In the case of VBS VMs, we also need to call the hypercall
> hv_mark_gpa_visibility() to expose the vmbus_connection.monitor_pages
> to Hyper-V, otherwise the VM fails to boot as a VBS VM.
>
> The change doesn't affect SNP VMs and regular VMs.
>
> Signed-off-by: Dexuan Cui <decui at microsoft.com>
> Signed-off-by: Tim Gardner <tim.gardner at canonical.com>
> ---
>  drivers/hv/connection.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
> index 8314cce7fe5d..252c5b7a69eb 100644
> --- a/drivers/hv/connection.c
> +++ b/drivers/hv/connection.c
> @@ -232,7 +232,7 @@ int vmbus_connect(void)
>  		goto cleanup;
>  	}
>
> -	if (hv_isolation_type_snp()) {
> +	if (hv_is_isolation_supported()) {
>  		pfn[0] = virt_to_hvpfn(vmbus_connection.monitor_pages[0]);
>  		pfn[1] = virt_to_hvpfn(vmbus_connection.monitor_pages[1]);
>  		if (hv_mark_gpa_visibility(2, pfn,
> @@ -319,7 +319,7 @@ void vmbus_disconnect(void)
>  		vmbus_connection.int_page = NULL;
>  	}
>
> -	if (hv_isolation_type_snp()) {
> +	if (hv_is_isolation_supported()) {
>  		if (vmbus_connection.monitor_pages_va[0]) {
>  			vunmap(vmbus_connection.monitor_pages[0]);
>  			vmbus_connection.monitor_pages[0]
> --
> 2.37.0


- --
Regards,
Marcelo
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