From: Nuno Das Neves <nunodasneves@linux.microsoft.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: linux-hyperv@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org,
mhklinux@outlook.com, decui@microsoft.com,
catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
hpa@zytor.com, lpieralisi@kernel.org, kw@linux.com,
manivannan.sadhasivam@linaro.org, robh@kernel.org,
bhelgaas@google.com, jinankjain@linux.microsoft.com,
skinsburskii@linux.microsoft.com, mrathor@linux.microsoft.com,
x86@kernel.org
Subject: Re: [PATCH 4/4] PCI: hv: Use the correct hypercall for unmasking interrupts on nested
Date: Wed, 18 Jun 2025 15:45:21 -0700 [thread overview]
Message-ID: <f6c8da5d-9dc0-488e-88e5-39f53127b6a3@linux.microsoft.com> (raw)
In-Reply-To: <20250613193616.GA971782@bhelgaas>
On 6/13/2025 12:36 PM, Bjorn Helgaas wrote:
> On Tue, Jun 10, 2025 at 04:52:06PM -0700, Nuno Das Neves wrote:
>> From: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
>>
>> Running as nested root on MSHV imposes a different requirement
>> for the pci-hyperv controller.
>>
>> In this setup, the interrupt will first come to the L1 (nested) hypervisor,
>> which will deliver it to the appropriate root CPU. Instead of issuing the
>> RETARGET hypercall, we should issue the MAP_DEVICE_INTERRUPT
>> hypercall to L1 to complete the setup.
>
> Maybe strengthen this to say that this issues MAP_DEVICE_INTERRUPT
> instead of RETARGET in this case? (Not just that we "should".)
>
Good suggestion, thanks.
>> Rename hv_arch_irq_unmask() to hv_irq_retarget_interrupt().
next prev parent reply other threads:[~2025-06-18 22:48 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-10 23:52 [PATCH 0/4] Nested virtualization fixes for root partition Nuno Das Neves
2025-06-10 23:52 ` [PATCH 1/4] PCI: hv: Do not do vmbus initialization on baremetal Nuno Das Neves
2025-06-11 23:06 ` Michael Kelley
2025-06-16 20:06 ` Nuno Das Neves
2025-06-10 23:52 ` [PATCH 2/4] Drivers: hv: Use nested hypercall for post message and signal event Nuno Das Neves
2025-06-11 23:06 ` Michael Kelley
2025-06-16 20:18 ` Nuno Das Neves
2025-06-10 23:52 ` [PATCH 3/4] x86: hyperv: Expose hv_map_msi_interrupt function Nuno Das Neves
2025-06-11 23:07 ` Michael Kelley
2025-06-18 21:08 ` Nuno Das Neves
2025-06-19 22:02 ` Michael Kelley
2025-06-20 16:19 ` Thomas Gleixner
2025-06-23 22:13 ` Nuno Das Neves
2025-06-10 23:52 ` [PATCH 4/4] PCI: hv: Use the correct hypercall for unmasking interrupts on nested Nuno Das Neves
2025-06-11 23:07 ` Michael Kelley
2025-06-18 21:24 ` Nuno Das Neves
2025-06-13 19:36 ` Bjorn Helgaas
2025-06-18 22:45 ` Nuno Das Neves [this message]
2025-06-11 17:55 ` [PATCH 0/4] Nested virtualization fixes for root partition Roman Kisel
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