From: Joerg Roedel <joro@8bytes.org>
To: lantianyu1986@gmail.com
Cc: Lan Tianyu <Tianyu.Lan@microsoft.com>,
mchehab+samsung@kernel.org, davem@davemloft.net,
gregkh@linuxfoundation.org, akpm@linux-foundation.org,
nicolas.ferre@microchip.com, arnd@arndb.de,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
michael.h.kelley@microsoft.com, kys@microsoft.com,
vkuznets@redhat.com, alex.williamson@redhat.com
Subject: Re: [PATCH 2/3] HYPERV/IOMMU: Add Hyper-V stub IOMMU driver
Date: Fri, 1 Feb 2019 17:34:43 +0100 [thread overview]
Message-ID: <20190201163443.GS32526@8bytes.org> (raw)
In-Reply-To: <1548929853-25877-3-git-send-email-Tianyu.Lan@microsoft.com>
Hi,
On Thu, Jan 31, 2019 at 06:17:32PM +0800, lantianyu1986@gmail.com wrote:
> +config HYPERV_IOMMU
> + bool "Hyper-V stub IOMMU support"
This is not a real IOMMU driver, it only implements IRQ remapping
capabilities. Please change the name to reflect that, e.g. to
"Hyper-V IRQ Remapping Support" or something like that.
> +static int __init hyperv_prepare_irq_remapping(void)
> +{
> + struct fwnode_handle *fn;
> + u32 apic_id;
> + int i;
> +
> + if (x86_hyper_type != X86_HYPER_MS_HYPERV ||
> + !x2apic_supported())
> + return -ENODEV;
> +
> + fn = irq_domain_alloc_named_id_fwnode("HYPERV-IR", 0);
> + if (!fn)
> + return -EFAULT;
Why does this return -EFAULT? I guess there is no fault happening in
irq_domain_alloc_named_id_fwnode()...
Joerg
next prev parent reply other threads:[~2019-02-01 16:34 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-31 10:17 [PATCH 0/3] x86/Hyper-V/IOMMU: Add Hyper-V IOMMU driver to support x2apic mode lantianyu1986
2019-01-31 10:17 ` [PATCH 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available lantianyu1986
2019-01-31 11:57 ` Greg KH
2019-01-31 12:02 ` Tianyu Lan
2019-02-01 7:06 ` Dan Carpenter
2019-02-01 7:10 ` Tianyu Lan
2019-01-31 10:17 ` [PATCH 2/3] HYPERV/IOMMU: Add Hyper-V stub IOMMU driver lantianyu1986
2019-01-31 11:59 ` Greg KH
2019-01-31 12:08 ` Tianyu Lan
2019-01-31 14:04 ` Vitaly Kuznetsov
2019-02-01 5:45 ` Tianyu Lan
2019-02-01 16:34 ` Joerg Roedel [this message]
2019-02-02 2:51 ` Tianyu Lan
2019-02-01 17:00 ` Robin Murphy
2019-02-02 6:20 ` Tianyu Lan
[not found] ` <20190201145130.GW3973@sasha-vm>
2019-02-02 6:02 ` Tianyu Lan
2019-01-31 10:17 ` [PATCH 3/3] MAINTAINERS: Add Hyper-V IOMMU driver into Hyper-V CORE AND DRIVERS scope lantianyu1986
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