From: Nuno Das Neves <nunodasneves@linux.microsoft.com>
To: linux-hyperv@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
wei.liu@kernel.org, mhklinux@outlook.com, tglx@linutronix.de,
bhelgaas@google.com, romank@linux.microsoft.com
Cc: kys@microsoft.com, haiyangz@microsoft.com, decui@microsoft.com,
catalin.marinas@arm.com, will@kernel.org, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com,
lpieralisi@kernel.org, kw@linux.com, robh@kernel.org,
jinankjain@linux.microsoft.com, skinsburskii@linux.microsoft.com,
mrathor@linux.microsoft.com, x86@kernel.org,
Nuno Das Neves <nunodasneves@linux.microsoft.com>
Subject: [PATCH v3 0/3] Nested virtualization fixes for root partition
Date: Fri, 11 Jul 2025 12:18:49 -0700 [thread overview]
Message-ID: <1752261532-7225-1-git-send-email-nunodasneves@linux.microsoft.com> (raw)
Fixes for running as nested root partition on the Microsoft Hypervisor.
The first patch changes vmbus to make hypercalls to the L0 hypervisor
instead of the L1. This is needed because L0 hypervisor, not the L1, is
the one hosting the Windows root partition with the VMM that provides
vmbus.
The 2nd and 3rd patches fix interrupt unmasking on nested. In this
scenario, the L1 (nested) hypervisor does the interrupt mapping to root
partition cores. The vectors just need to be mapped with
MAP_DEVICE_INTERRUPT instead of affinitized with RETARGET_INTERRUPT.
Changes in v3:
- Remove 3 patches (#1,#3,#4 from v2) which were merged already (Wei Liu)
- Fix bug in #1 introduced in v2 (Michael Kelley)
- Improve commit message in #2 (Michael Kelley)
- Document return value of hv_map_msi_interrupt() in #2 (Michael Kelley)
Changes in v2:
- Reword commit messages for clarity (Michael Kelley, Bjorn Helgaas)
- Open-code nested hypercalls to reduce unnecessary code (Michael Kelley)
- Add patch (#3) to fix cpu_online_mask issue (Thomas Gleixner)
- Add patch (#4) to fix error return values (Michael Kelley)
- Remove several redundant error messages and checks (Michael Kelley)
Nuno Das Neves (1):
Drivers: hv: Use nested hypercall for post message and signal event
Stanislav Kinsburskii (2):
x86/hyperv: Expose hv_map_msi_interrupt()
PCI: hv: Use the correct hypercall for unmasking interrupts on nested
arch/x86/hyperv/irqdomain.c | 40 +++++++++++++++++++++--------
arch/x86/include/asm/mshyperv.h | 22 ++--------------
drivers/hv/connection.c | 5 +++-
drivers/hv/hv.c | 6 +++--
drivers/pci/controller/pci-hyperv.c | 18 +++++++++++--
5 files changed, 55 insertions(+), 36 deletions(-)
--
2.34.1
next reply other threads:[~2025-07-11 19:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-11 19:18 Nuno Das Neves [this message]
2025-07-11 19:18 ` [PATCH v3 1/3] Drivers: hv: Use nested hypercall for post message and signal event Nuno Das Neves
2025-07-11 19:25 ` Michael Kelley
2025-07-11 19:18 ` [PATCH v3 2/3] x86/hyperv: Expose hv_map_msi_interrupt() Nuno Das Neves
2025-07-11 19:28 ` Michael Kelley
2025-07-11 19:18 ` [PATCH v3 3/3] PCI: hv: Use the correct hypercall for unmasking interrupts on nested Nuno Das Neves
2025-07-15 6:24 ` [PATCH v3 0/3] Nested virtualization fixes for root partition Wei Liu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1752261532-7225-1-git-send-email-nunodasneves@linux.microsoft.com \
--to=nunodasneves@linux.microsoft.com \
--cc=bhelgaas@google.com \
--cc=bp@alien8.de \
--cc=catalin.marinas@arm.com \
--cc=dave.hansen@linux.intel.com \
--cc=decui@microsoft.com \
--cc=haiyangz@microsoft.com \
--cc=hpa@zytor.com \
--cc=jinankjain@linux.microsoft.com \
--cc=kw@linux.com \
--cc=kys@microsoft.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-hyperv@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=lpieralisi@kernel.org \
--cc=mhklinux@outlook.com \
--cc=mingo@redhat.com \
--cc=mrathor@linux.microsoft.com \
--cc=robh@kernel.org \
--cc=romank@linux.microsoft.com \
--cc=skinsburskii@linux.microsoft.com \
--cc=tglx@linutronix.de \
--cc=wei.liu@kernel.org \
--cc=will@kernel.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).