From: Wei Liu <wei.liu@kernel.org>
To: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Cc: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
wei.liu@kernel.org, mhklinux@outlook.com, kys@microsoft.com,
haiyangz@microsoft.com, decui@microsoft.com,
longli@microsoft.com, skinsburskii@linux.microsoft.com,
prapal@linux.microsoft.com, mrathor@linux.microsoft.com,
muislam@microsoft.com, anrayabh@linux.microsoft.com,
Jinank Jain <jinankjain@microsoft.com>
Subject: Re: [PATCH v5] mshv: Extend create partition ioctl to support cpu features
Date: Thu, 13 Nov 2025 19:47:54 +0000 [thread overview]
Message-ID: <20251113194754.GC1175882@liuwe-devbox-debian-v2.local> (raw)
In-Reply-To: <1763063133-3878-1-git-send-email-nunodasneves@linux.microsoft.com>
On Thu, Nov 13, 2025 at 11:45:33AM -0800, Nuno Das Neves wrote:
> From: Muminul Islam <muislam@microsoft.com>
>
> The existing mshv create partition ioctl does not provide a way to
> specify which cpu features are enabled in the guest. Instead, it
> attempts to enable all features and those that are not supported are
> silently disabled by the hypervisor.
>
> This was done to reduce unnecessary complexity and is sufficient for
> many cases. However, new scenarios require fine-grained control over
> these features.
>
> Define a new mshv_create_partition_v2 structure which supports
> passing the disabled processor and xsave feature bits through to the
> create partition hypercall directly.
>
> Introduce a new flag MSHV_PT_BIT_CPU_AND_XSAVE_FEATURES which enables
> the new structure. If unset, the original mshv_create_partition struct
> is used, with the old behavior of enabling all features.
>
> Co-developed-by: Jinank Jain <jinankjain@microsoft.com>
> Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
> Signed-off-by: Muminul Islam <muislam@microsoft.com>
> Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
> Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Queued to hyperv-next. Thanks!
Wei
prev parent reply other threads:[~2025-11-13 19:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-13 19:45 [PATCH v5] mshv: Extend create partition ioctl to support cpu features Nuno Das Neves
2025-11-13 19:47 ` Wei Liu [this message]
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