From: Dan Carpenter <dan.carpenter@oracle.com>
To: lantianyu1986@gmail.com
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com,
mchehab+samsung@kernel.org, sashal@kernel.org,
sthemmin@microsoft.com, joro@8bytes.org, x86@kernel.org,
michael.h.kelley@microsoft.com, mingo@redhat.com,
Lan Tianyu <Tianyu.Lan@microsoft.com>,
arnd@arndb.de, haiyangz@microsoft.com,
alex.williamson@redhat.com, bp@alien8.de, tglx@linutronix.de,
vkuznets@redhat.com, gregkh@linuxfoundation.org,
nicolas.ferre@microchip.com, iommu@lists.linux-foundation.org,
devel@linuxdriverproject.org, akpm@linux-foundation.org,
davem@davemloft.net
Subject: Re: [PATCH 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available
Date: Fri, 1 Feb 2019 10:06:55 +0300 [thread overview]
Message-ID: <20190201070655.GA14343@kadam> (raw)
In-Reply-To: <1548929853-25877-2-git-send-email-Tianyu.Lan@microsoft.com>
On Thu, Jan 31, 2019 at 06:17:31PM +0800, lantianyu1986@gmail.com wrote:
>
>
This comment needs to be indented one tab or it looks like we're outside
the funciton.
> +/*
> + * Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic,
> + * set x2apic destination mode to physcial mode when x2apic is available
> + * and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs
> + * have 8-bit APIC id.
> + */
> +# if IS_ENABLED(CONFIG_HYPERV_IOMMU)
> + if (x2apic_supported())
> + x2apic_phys = 1;
> +# endif
The IS_ENABLED() macro is really magical. You could write this like so:
if (IS_ENABLED(CONFIG_HYPERV_IOMMU) && x2apic_supported())
x2apic_phys = 1;
It works the same and is slightly more pleasant to look at.
regards,
dan carpenter
next prev parent reply other threads:[~2019-02-01 7:07 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 [this message]
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
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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