linux-kernel - Re: [PATCH] x86: find nr_irqs_gsi with mp_ioapic

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Date:	Mon, 9 Feb 2009 09:13:50 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: find nr_irqs_gsi with mp_ioapic_routing


* Yinghai Lu <yinghai@...nel.org> wrote:

> 
> Impact: find right nr_irqs_gsi on some systems.
> 
> one system has gap between gsi.
> [    0.000000] ACPI: IOAPIC (id[0x04] address[0xfec00000] gsi_base[0])
> [    0.000000] IOAPIC[0]: apic_id 4, version 0, address 0xfec00000, GSI 0-23
> [    0.000000] ACPI: IOAPIC (id[0x05] address[0xfeafd000] gsi_base[48])
> [    0.000000] IOAPIC[1]: apic_id 5, version 0, address 0xfeafd000, GSI 48-54
> [    0.000000] ACPI: IOAPIC (id[0x06] address[0xfeafc000] gsi_base[56])
> [    0.000000] IOAPIC[2]: apic_id 6, version 0, address 0xfeafc000, GSI 56-62
> ...
> [    0.000000] nr_irqs_gsi: 38
> 
> so nr_irqs_gsi is not right. some irq for MSI will overwrite with io_apic.
> 
> need to get that with acpi_probe_gsi when acpi io_apic is used
> 
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> 
> ---
>  arch/x86/include/asm/mpspec.h |    5 +++++
>  arch/x86/kernel/acpi/boot.c   |   23 +++++++++++++++++++++++
>  arch/x86/kernel/io_apic.c     |   20 +++++++++++++++-----
>  3 files changed, 43 insertions(+), 5 deletions(-)

Applied to tip/x86/apic, thanks Yinghai!

Could you please send one against linus/master too please? (there's conflicts)

	Ingo
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