From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E223935A39D for ; Sun, 8 Mar 2026 09:22:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772961737; cv=none; b=Q1/YnMzIWW/nlZFivilODuJZZrtFFP3RyuZvwdL6JYS1BnZI+JmkbFCf+nG+AQRTTHyer1HkXJaPWP07BZVAMdMH7293Q88h0A8iYy/kgOGmFxpEGi1OeTEU6AZFq4YzbGTT7KxwkUm6D/21hzsXI5jicgK/PX63t01X2BumJIo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772961737; c=relaxed/simple; bh=9eXqvflkDXtsszj+H/TpVmpDyUrKx26iIM2v/bfMV8E=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=PsUNnGiB/ymFn9E0g4DLWf0KzcAWIf40clv6VfjeH8X45B/ChN59o5gIRtkCRPl0O+PtyW3rI3FEOBID4kZ0a+h9F0UmoxyN/DUNYoSic+Mn/1OvFnptEpluGGjl03HxovSFWk52BbBDiNWKrEjsOzYXCU+W0B7Bb2rAurWdQ1Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NN7h8+is; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NN7h8+is" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC049C116C6; Sun, 8 Mar 2026 09:22:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772961736; bh=9eXqvflkDXtsszj+H/TpVmpDyUrKx26iIM2v/bfMV8E=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=NN7h8+is69SHbKuiUMTlkgiummWGoL4WGD8eqPxkNnlEdTnpadWbhTN6u2JIdEJAX ZYbq7EEAv1D6x+0wyz+PXDHCr6Q+YJ4Ue8Qny20Z0Ma4HmlsW5+rpR9RtWoZcSP09+ cRCEHvaP5B9vmq9Izrs2wJuoDXwDRH/aZtLqqdgQw6G4oFCoTX8FDa/bEe11MGbMWy 3ihpkgUgRkGhWMLDu3+Ov5jUxAQFCU2X8y+/Ent+m0LQgopVq5W1blyEqzyK760HWv J7DTRW8Cg9h8wWkV8Kil0D+UKMYYecIvD4Gov3AqJjFbG15vi91cQZkDlAJQL+OKcj e5vZtZI0kwIQQ== From: Thomas Gleixner To: Shashank Balaji , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Suresh Siddha Cc: Ingo Molnar , linux-kernel@vger.kernel.org, Jan Kiszka , Sohil Mehta , Andrew Cooper , Shashank Balaji , Rahul Bukte , Daniel Palmer , Tim Bird Subject: Re: [PATCH v2 2/2] x86/defconfig: Add CONFIG_IRQ_REMAP In-Reply-To: <20260306-x2apic-fix-v2-2-bee99c12efa3@sony.com> References: <20260306-x2apic-fix-v2-0-bee99c12efa3@sony.com> <20260306-x2apic-fix-v2-2-bee99c12efa3@sony.com> Date: Sun, 08 Mar 2026 10:22:13 +0100 Message-ID: <877brm3cca.ffs@tglx> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Fri, Mar 06 2026 at 14:46, Shashank Balaji wrote: > x2apic is enabled in the defconfig, and interrupt remapping is an archite= ctural > 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=C2=AE 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 m= etal > actually uses x2apic. > > Co-developed-by: Rahul Bukte > Signed-off-by: Rahul Bukte > Signed-off-by: Shashank Balaji Acked-by: Thomas Gleixner