From: Thomas Gleixner <tglx@kernel.org>
To: Shashank Balaji <shashank.mahadasyam@sony.com>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org, Jan Kiszka <jan.kiszka@siemens.com>,
Sohil Mehta <sohil.mehta@intel.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Shashank Balaji <shashank.mahadasyam@sony.com>,
Rahul Bukte <rahul.bukte@sony.com>,
Daniel Palmer <daniel.palmer@sony.com>,
Tim Bird <tim.bird@sony.com>
Subject: Re: [PATCH v2 2/2] x86/defconfig: Add CONFIG_IRQ_REMAP
Date: Sun, 08 Mar 2026 10:22:13 +0100 [thread overview]
Message-ID: <877brm3cca.ffs@tglx> (raw)
In-Reply-To: <20260306-x2apic-fix-v2-2-bee99c12efa3@sony.com>
On Fri, Mar 06 2026 at 14:46, Shashank Balaji wrote:
> x2apic is enabled in the defconfig, and interrupt remapping is an architectural
> dependency of x2apic as per the Intel SDM:
>
> Routing of device interrupts to local APIC units operating in x2APIC
> mode requires use of the interrupt-remapping architecture specified in
> the Intel® Virtualization Technology for Directed I/O (Revision 1.3
> and/or later versions).
>
> Enable CONFIG_IRQ_REMAP in defconfig so that a defconfig kernel on bare metal
> actually uses x2apic.
>
> Co-developed-by: Rahul Bukte <rahul.bukte@sony.com>
> Signed-off-by: Rahul Bukte <rahul.bukte@sony.com>
> Signed-off-by: Shashank Balaji <shashank.mahadasyam@sony.com>
Acked-by: Thomas Gleixner <tglx@kernel.org>
next prev parent reply other threads:[~2026-03-08 9:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-06 5:46 [PATCH v2 0/2] x86/x2apic: Fix hangup of defconfig kernel on resume from s2ram Shashank Balaji
2026-03-06 5:46 ` [PATCH v2 1/2] x86/x2apic: Disable x2apic on resume if the kernel expects so Shashank Balaji
2026-03-08 9:21 ` Thomas Gleixner
2026-03-09 0:59 ` Sohil Mehta
2026-03-10 11:30 ` [tip: x86/urgent] x86/apic: " tip-bot2 for Shashank Balaji
2026-03-06 5:46 ` [PATCH v2 2/2] x86/defconfig: Add CONFIG_IRQ_REMAP Shashank Balaji
2026-03-08 9:22 ` Thomas Gleixner [this message]
2026-03-09 1:01 ` Sohil Mehta
2026-03-10 18:10 ` [tip: x86/misc] x86/64/defconfig: " tip-bot2 for Shashank Balaji
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