linux-kernel - [PATCH v0 0/6] Hyper-V: Implement hypervisor core collection

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 for Android: free password hash cracker in your pocket

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

Message-Id: <20250904021017.1628993-1-mrathor@linux.microsoft.com>
Date: Wed,  3 Sep 2025 19:10:11 -0700
From: Mukesh Rathor <mrathor@...ux.microsoft.com>
To: linux-hyperv@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org
Cc: kys@...rosoft.com,
	haiyangz@...rosoft.com,
	wei.liu@...nel.org,
	decui@...rosoft.com,
	tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	dave.hansen@...ux.intel.com,
	x86@...nel.org,
	hpa@...or.com,
	arnd@...db.de
Subject: [PATCH v0 0/6] Hyper-V: Implement hypervisor core collection

This patch series implements hypervisor core collection when running
under linux as root (aka dom0). By default initial hypervisor ram is
already mapped into linux as reserved. Further any ram deposited comes
from linux direct map. The hypervisor locks all that ram to protect
it from dom0 or any other domains. At a high level, the methodology
involes devirtualizing the system on the fly upon either linux crash
or the hypervisor crash, then collecting ram as usual. This means 
hypervisor ram is automatically collected into the vmcore. 

Hypervisor pages are then accessible via crash command (using raw mem 
dump) or windbg which has the ability to read hypervisor symbol pdb
file.

Mukesh Rathor (6):
  x86/hyperv: Rename guest shutdown functions
  Hyper-V: Add two new hypercall numbers to guest ABI public header
  Hyper-V: Add definitions for hypervisor crash dump support
  x86/hyperv: Add trampoline asm code to transition from hypervisor
  x86/hyperv: Implement hypervisor ram collection into vmcore
  Hyper-V: Enable build of hypervisor crash collection files

 arch/x86/hyperv/Makefile        |   6 +
 arch/x86/hyperv/hv_crash.c      | 618 ++++++++++++++++++++++++++++++++
 arch/x86/hyperv/hv_init.c       |   2 +
 arch/x86/hyperv/hv_trampoline.S |  99 +++++
 arch/x86/kernel/cpu/mshyperv.c  |   5 +-
 include/asm-generic/mshyperv.h  |   9 +
 include/hyperv/hvgdk_mini.h     |   2 +
 include/hyperv/hvhdk_mini.h     |  55 +++
 8 files changed, 794 insertions(+), 2 deletions(-)
 create mode 100644 arch/x86/hyperv/hv_crash.c
 create mode 100644 arch/x86/hyperv/hv_trampoline.S

-- 
2.36.1.vfs.0.0