linux-kernel - Re: [PATCH 5/6] mshv: Allocate vp state page for HVCALL_MAP_VP_STATE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <efb80064-6eb3-40c5-bce0-18733765768a@linux.microsoft.com>
Date: Fri, 5 Sep 2025 12:41:32 -0700
From: Easwar Hariharan <easwar.hariharan@...ux.microsoft.com>
To: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
Cc: linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
 easwar.hariharan@...ux.microsoft.com, kys@...rosoft.com,
 haiyangz@...rosoft.com, wei.liu@...nel.org, mhklinux@...look.com,
 decui@...rosoft.com, paekkaladevi@...ux.microsoft.com,
 Jinank Jain <jinankjain@...ux.microsoft.com>
Subject: Re: [PATCH 5/6] mshv: Allocate vp state page for
 HVCALL_MAP_VP_STATE_PAGE on L1VH

On 8/28/2025 5:43 PM, Nuno Das Neves wrote:
> From: Jinank Jain <jinankjain@...ux.microsoft.com>
> 
> Introduce mshv_use_overlay_gpfn() to check if a page needs to be
> allocated and passed to the hypervisor to map VP state pages. This is
> only needed on L1VH, and only on some (newer) versions of the
> hypervisor, hence the need to check vmm_capabilities.
> 
> Introduce functions hv_map/unmap_vp_state_page() to handle the
> allocation and freeing.
> 
> Signed-off-by: Jinank Jain <jinankjain@...ux.microsoft.com>
> Signed-off-by: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
> ---
>  drivers/hv/mshv_root.h         | 11 +++---
>  drivers/hv/mshv_root_hv_call.c | 61 +++++++++++++++++++++++++---
>  drivers/hv/mshv_root_main.c    | 72 +++++++++++++++++-----------------
>  3 files changed, 96 insertions(+), 48 deletions(-)

<snip>

Reviewed-by: Easwar Hariharan <easwar.hariharan@...ux.microsoft.com>