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From: Greg KH <gregkh@linuxfoundation.org>
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, 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: Thu, 31 Jan 2019 12:57:56 +0100	[thread overview]
Message-ID: <20190131115756.GA19969@kroah.com> (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:
> From: Lan Tianyu <Tianyu.Lan@microsoft.com>
> 
> 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.
> 
> Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
> ---
>  arch/x86/kernel/cpu/mshyperv.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
> index e81a2db..9d62f33 100644
> --- a/arch/x86/kernel/cpu/mshyperv.c
> +++ b/arch/x86/kernel/cpu/mshyperv.c
> @@ -36,6 +36,8 @@
>  struct ms_hyperv_info ms_hyperv;
>  EXPORT_SYMBOL_GPL(ms_hyperv);
>  
> +extern int x2apic_phys;

Shouldn't this be in a .h file somewhere instead?

thanks,

greg k-h

  reply	other threads:[~2019-01-31 11:58 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 [this message]
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
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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