From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 9B4342FC4A for ; Tue, 14 Nov 2023 21:18:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="bbgCNZC3" Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42970116 for ; Tue, 14 Nov 2023 13:18:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=gECNK7hNnz9BN8xpS+w416YYyNbDY/ic3nanEYq03Es=; b=bbgCNZC37w47nIC8h1N2kXZZ9P aHS2PVR0h7t2NfF4ktZqR3bLrS42ROtdDo1otwnxM7TF5o9p8KuGVU6Rpz4KuBbobL+xF9EpMTJ1L kRBsqhXp42d0bqHAwCRd+9PPkQ8NwskOd1nMvQVypSVmL9ibRdwKcdQd5WlvxOSrEzJ1gh4UgXr7+ DH/+y8tk/k9kcJilL5Ophur/CUEvRM+STUY/oDVBpVvAExyk64FcqvgL8O8jhS2M31B2LFwVeRqo+ Qn9VEDk/A65jE/X0iLOy/QveO+5AqPr+wfTxszoAHy+mcT0Qr5pFNY4hvIRsEOdsppElCvrioSSL5 y9/fD1BA==; Received: from [12.186.190.1] (helo=u3832b3a9db3152.ant.amazon.com) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1r30nm-00AF61-UV; Tue, 14 Nov 2023 21:18:31 +0000 Message-ID: <6444dfbb334151579607a8d76da8ebf6434f6278.camel@infradead.org> Subject: Re: [PATCH-for-9.0 v2 06/19] hw/pci/msi: Restrict xen_is_pirq_msi() call to Xen From: David Woodhouse To: Philippe =?ISO-8859-1?Q?Mathieu-Daud=E9?= , qemu-devel@nongnu.org Cc: Alex =?ISO-8859-1?Q?Benn=E9e?= , Paul Durrant , qemu-arm@nongnu.org, Paolo Bonzini , Stefano Stabellini , Richard Henderson , xen-devel@lists.xenproject.org, qemu-block@nongnu.org, Anthony Perard , kvm@vger.kernel.org, Thomas Huth , "Michael S. Tsirkin" , Marcel Apfelbaum Date: Tue, 14 Nov 2023 16:18:27 -0500 In-Reply-To: <87CD61D3-D862-45C6-9DBC-2765D747EA58@infradead.org> References: <20231114143816.71079-1-philmd@linaro.org> <20231114143816.71079-7-philmd@linaro.org> <7fd25b34-6fd9-4f7c-90b4-e44338b2b09e@linaro.org> <87CD61D3-D862-45C6-9DBC-2765D747EA58@infradead.org> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/pkcs7-signature"; boundary="=-olabTuHfq9fA1SvIFDdf" User-Agent: Evolution 3.44.4-0ubuntu2 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html --=-olabTuHfq9fA1SvIFDdf Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, 2023-11-14 at 10:44 -0500, David Woodhouse wrote: >=20 > I believe that if you push your branch to a gitlab tree with the > right CI variables defined, it'll run all the CI? And I *hope* it > fails with this patch. It's precisely the kind of thing I was > *intending* to catch with the testing! So it doesn't fail. Because virtio-net-pci doesn't use MSI, we need to test with E1000E or something like that. And actually I'm not 100% convinced the avocado tests are even running in the gitlab CI. And also, if I test it manually... it doesn't fail because you didn't break it :) You didn't break the xen_evtchn_snoop_msi() call; that still works. What you were changing is the part which makes msi_is_masked() lie and unconditionally return false when it's mapped to a Xen PIRQ. And actually, even in the Xen-emulation case, xen_is_pirq_msi() is always returning zero. So your patch isn't changing anything. It *does*, however, make hw/pci/msi.c do this exactly the same way as hw/pci/msix.c does. That one does check xen_enabled() first. I need to double-check whether the msi{x,}_is_masked() checks ought to be doing the same for Xen-emu as they do on real Xen. That whole thing is a complete abomination. But that isn't your problem. For your patch, Reviewed-by: David Woodhouse --=-olabTuHfq9fA1SvIFDdf Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEkQw ggYQMIID+KADAgECAhBNlCwQ1DvglAnFgS06KwZPMA0GCSqGSIb3DQEBDAUAMIGIMQswCQYDVQQG EwJVUzETMBEGA1UECBMKTmV3IEplcnNleTEUMBIGA1UEBxMLSmVyc2V5IENpdHkxHjAcBgNVBAoT FVRoZSBVU0VSVFJVU1QgTmV0d29yazEuMCwGA1UEAxMlVVNFUlRydXN0IFJTQSBDZXJ0aWZpY2F0 aW9uIEF1dGhvcml0eTAeFw0xODExMDIwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMIGWMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRgwFgYD VQQKEw9TZWN0aWdvIExpbWl0ZWQxPjA8BgNVBAMTNVNlY3RpZ28gUlNBIENsaWVudCBBdXRoZW50 aWNhdGlvbiBhbmQgU2VjdXJlIEVtYWlsIENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC AQEAyjztlApB/975Rrno1jvm2pK/KxBOqhq8gr2+JhwpKirSzZxQgT9tlC7zl6hn1fXjSo5MqXUf ItMltrMaXqcESJuK8dtK56NCSrq4iDKaKq9NxOXFmqXX2zN8HHGjQ2b2Xv0v1L5Nk1MQPKA19xeW 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