From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 A34F7258CCC; Fri, 2 Jan 2026 16:23:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767371027; cv=none; b=ZCf8xSW3kx1Dli8gWZfPeymQs9/ycnq5Z5YAwvy3PjsmlXxAGAqVFVa35qaOiKBc9Pezhk7cLvGAHMpCkcYgEYzFdfKg9sG1sYcMDz/62LlzcXaqgEkoXnKo9cDRhHuaUlsgDtF1FO52NXohovNGVgGWANkjIbU5JNJR6YzNG8A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767371027; c=relaxed/simple; bh=+t/1yoVWnEBfJtgTtDW5aaVGUutMl1Z0qbp+ZH3X9PA=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=ajYwMdFsruMjyx+Ua2GY3VFOp0e7vJXgX6ulJMdEDYbug/E3Gt/11sqfmUWNo3IWnzGveWSPFKI6yGITUqxZw6e8tR3QeEjAy6vx3hemZXqWWTO2dQiZOIw/DRD3utch8ums6u6hqPLMApMP9ciNDzzvCVU7ZMPWTro/w1itPqs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=desiato.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=YuLDf+gA; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=desiato.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="YuLDf+gA" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=MIME-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=+t/1yoVWnEBfJtgTtDW5aaVGUutMl1Z0qbp+ZH3X9PA=; b=YuLDf+gArUabMOhmI7J8QNDyeO 4HXEGlNXS+mv0Sm0NXVotj0LUyF2hfCzW/sI+2COjtynnIkKmheDpoFvDbEZUUr4Z86bmb+uEWGeJ rT5DEayeHgivpapamC7IJxoXmwYo2MOd9TBlu9EX52OOu6ieDEeU+Kkd0Lzzh4KmA9vmeDt4cM/M5 kAbzAFXyX8R8O5wYLIwudd3d+UPe/Wr31AwnW2E1ve9hkiRmo0wv8P8DBxXXbK4x7SHaUl9jsBI5U 1a7n7KyOB1BuJf1SVhLjdW8uqlrsl2It+TQG5bFz6FVpCudbbgS3DvFUISOo3AAgOojPA36aMrKBE 0W9+zbjg==; Received: from [172.31.31.240] (helo=u09cd745991455d.ant.amazon.com) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1vbhw7-000000061iC-2IBj; Fri, 02 Jan 2026 16:23:36 +0000 Message-ID: Subject: Re: [PATCH v5 1/3] KVM: x86: Refactor suppress EOI broadcast logic From: David Woodhouse To: Khushit Shah , seanjc@google.com, pbonzini@redhat.com, kai.huang@intel.com Cc: mingo@redhat.com, x86@kernel.org, bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, dave.hansen@linux.intel.com, tglx@linutronix.de, jon@nutanix.com, shaju.abraham@nutanix.com Date: Fri, 02 Jan 2026 16:23:35 +0000 In-Reply-To: <20251229111708.59402-2-khushit.shah@nutanix.com> References: <20251229111708.59402-1-khushit.shah@nutanix.com> <20251229111708.59402-2-khushit.shah@nutanix.com> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/pkcs7-signature"; boundary="=-5l/WRKmSJXRdPZCZ/cK5" User-Agent: Evolution 3.52.3-0ubuntu1.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html --=-5l/WRKmSJXRdPZCZ/cK5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2025-12-29 at 11:17 +0000, Khushit Shah wrote: > Extract the suppress EOI broadcast (Directed EOI) logic into helper > functions and move the check from kvm_ioapic_update_eoi_one() to > kvm_ioapic_update_eoi() (required for a later patch). Prepare > kvm_ioapic_send_eoi() to honor Suppress EOI Broadcast in split IRQCHIP > mode. >=20 > Introduce two helper functions: > - kvm_lapic_advertise_suppress_eoi_broadcast(): determines whether KVM > =C2=A0 should advertise Suppress EOI Broadcast support to the guest > - kvm_lapic_respect_suppress_eoi_broadcast(): determines whether KVM shou= ld > =C2=A0 honor the guest's request to suppress EOI broadcasts >=20 > This refactoring prepares for I/O APIC version 0x20 support and userspace > control of suppress EOI broadcast behavior. >=20 > Signed-off-by: Khushit Shah Looks good to me, thanks for pushing this through to completion! Reviewed-by: David Woodhouse Nit: Ideally I would would prefer to see an explicit 'no functional change intended' and a reference to commit 0bcc3fb95b97a. --=-5l/WRKmSJXRdPZCZ/cK5 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCD9Aw ggSOMIIDdqADAgECAhAOmiw0ECVD4cWj5DqVrT9PMA0GCSqGSIb3DQEBCwUAMGUxCzAJBgNVBAYT AlVTMRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5jb20xJDAi BgNVBAMTG0RpZ2lDZXJ0IEFzc3VyZWQgSUQgUm9vdCBDQTAeFw0yNDAxMzAwMDAwMDBaFw0zMTEx MDkyMzU5NTlaMEExCzAJBgNVBAYTAkFVMRAwDgYDVQQKEwdWZXJva2V5MSAwHgYDVQQDExdWZXJv a2V5IFNlY3VyZSBFbWFpbCBHMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMjvgLKj jfhCFqxYyRiW8g3cNFAvltDbK5AzcOaR7yVzVGadr4YcCVxjKrEJOgi7WEOH8rUgCNB5cTD8N/Et GfZI+LGqSv0YtNa54T9D1AWJy08ZKkWvfGGIXN9UFAPMJ6OLLH/UUEgFa+7KlrEvMUupDFGnnR06 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