linux-kernel - [PATCH 0/6] mshv: Fixes for stats and vp state page mappings

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-next>] [day] [month] [year] [list]

Message-Id: <1756428230-3599-1-git-send-email-nunodasneves@linux.microsoft.com>
Date: Thu, 28 Aug 2025 17:43:44 -0700
From: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
To: linux-hyperv@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: kys@...rosoft.com,
	haiyangz@...rosoft.com,
	wei.liu@...nel.org,
	mhklinux@...look.com,
	decui@...rosoft.com,
	paekkaladevi@...ux.microsoft.com,
	Nuno Das Neves <nunodasneves@...ux.microsoft.com>
Subject: [PATCH 0/6] mshv: Fixes for stats and vp state page mappings

There are some differences in how L1VH partitions must map stats and vp
state pages, some of which are due to differences across hypervisor
versions. Detect and handle these cases.

Patch 1:
Fix for the logic of when to map the vp stats page.

Patch 2:
Compatibility fix for configurations where hypervisor does not provide a
"PARENT" stats area, only "SELF". Fall back to just using "SELF".

Patches 3-6:
On newer hypervisors L1VH partitions must allocate and free stats and vp
state pages, and use a new hypercall HVCALL_MAP_VP_STATS_PAGE2 to map the
stats page.

Add HVCALL_GET_PARTITION_PROPERTY_EX to query a feature bit to determine
whether to allocate the pages and use the new stats hypercall.

Jinank Jain (2):
  mshv: Allocate vp state page for HVCALL_MAP_VP_STATE_PAGE on L1VH
  mshv: Introduce new hypercall to map stats page for L1VH partitions

Nuno Das Neves (1):
  mshv: Only map vp->vp_stats_pages if on root scheduler

Purna Pavan Chandra Aekkaladevi (3):
  mshv: Ignore second stats page map result failure
  mshv: Add the HVCALL_GET_PARTITION_PROPERTY_EX hypercall
  mshv: Get the vmm capabilities offered by the hypervisor

 drivers/hv/mshv_root.h         |  24 ++--
 drivers/hv/mshv_root_hv_call.c | 227 ++++++++++++++++++++++++++++++---
 drivers/hv/mshv_root_main.c    | 140 ++++++++++++--------
 include/hyperv/hvgdk_mini.h    |   2 +
 include/hyperv/hvhdk.h         |  40 ++++++
 include/hyperv/hvhdk_mini.h    |  33 +++++
 6 files changed, 390 insertions(+), 76 deletions(-)

-- 
2.34.1