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Fri, 30 Apr 2021 11:47:48 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6F735613E8; Fri, 30 Apr 2021 11:47:46 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lcRcW-00ABQr-7u; Fri, 30 Apr 2021 12:47:44 +0100 Date: Fri, 30 Apr 2021 12:47:43 +0100 Message-ID: <87czucngdc.wl-maz@kernel.org> From: Marc Zyngier To: Shanker R Donthineni Cc: Alex Williamson , Will Deacon , "Catalin\ Marinas" , Christoffer Dall , , , , , Vikram Sethi , Jason Sequeira Subject: Re: [RFC 1/2] vfio/pci: keep the prefetchable attribute of a BAR region in VMA In-Reply-To: References: <20210429162906.32742-1-sdonthineni@nvidia.com> <20210429162906.32742-2-sdonthineni@nvidia.com> <20210429122840.4f98f78e@redhat.com> <470360a7-0242-9ae5-816f-13608f957bf6@nvidia.com> <20210429134659.321a5c3c@redhat.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: sdonthineni@nvidia.com, alex.williamson@redhat.com, will@kernel.org, catalin.marinas@arm.com, christoffer.dall@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, vsethi@nvidia.com, jsequeira@nvidia.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210430_044747_651656_D9BCFEA8 X-CRM114-Status: GOOD ( 26.09 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkgU2hhbmtlciwKCk9uIEZyaSwgMzAgQXByIDIwMjEgMTI6MjU6MDggKzAxMDAsClNoYW5rZXIg UiBEb250aGluZW5pIDxzZG9udGhpbmVuaUBudmlkaWEuY29tPiB3cm90ZToKPiAKPiBIaSBBbGV4 Cj4gCj4gT24gNC8yOS8yMSAyOjQ2IFBNLCBBbGV4IFdpbGxpYW1zb24gd3JvdGU6Cj4gPiBJZiBh biBhbGlnbm1lbnQgZmF1bHQgaXMgZml4ZWQgYnkgY29uZmlndXJpbmcgYSBXQyBtYXBwaW5nLCBk b2Vzbid0Cj4gPiB0aGF0IHN1Z2dlc3QgdGhhdCB0aGUgZHJpdmVyIHBlcmZvcm1lZCBhbiB1bmFs aWduZWQgYWNjZXNzIGl0c2VsZiBhbmQKPiA+IGlzIHJlbHlpbmcgb24gd3JpdGUgY29tYmluaW5n IGJ5IHRoZSBwcm9jZXNzb3IgdG8gY29ycmVjdCB0aGF0IGVycm9yPwo+ID4gVGhhdCdzIHdyb25n LiAgRml4IHRoZSBkcml2ZXIgb3IgcGxlYXNlIG9mZmVyIGFub3RoZXIgZXhwbGFuYXRpb24gb2YK PiA+IGhvdyB0aGUgV0MgbWFwcGluZyByZXNvbHZlcyB0aGlzLiAgSSBzdXNwZWN0IHlvdSBjb3Vs ZCBlbmFibGUgdHJhY2luZwo+ID4gaW4gUUVNVSwgZGlzYWJsZSBNTUlPIG1tYXBzIG9uIHRoZSB2 ZmlvLXBjaSBkZXZpY2UgYW5kIGZpbmQgdGhlIGludmFsaWQKPiA+IGFjY2Vzcy4KPiA+Cj4gPj4g V2UndmUgdHdvIGNvbmNlcm5zIGhlcmU6Cj4gPj4gICAgLSBQZXJmb3JtYW5jZSBpbXBhY3RzIGZv ciBwYXNzLXRocm91Z2ggZGV2aWNlcy4KPiA+PiAgICAtIFRoZSBkZWZpbml0aW9uIG9mIGlvcmVt YXBfd2MoKSBmdW5jdGlvbiBkb2Vzbid0IG1hdGNoIHRoZSBob3N0Cj4gPj4ga2VybmVsIG9uIEFS TTY0Cj4gPiBQZXJmb3JtYW5jZSBJIGNhbiB1bmRlcnN0YW5kLCBidXQgSSB0aGluayB5b3UncmUg YWxzbyB1c2luZyBpdCB0byBtYXNrCj4gPiBhIGRyaXZlciBidWcgd2hpY2ggc2hvdWxkIGJlIHJl c29sdmVkIGZpcnN0LiAgVGhhbmsKPiAKPiBXZeKAmXZlIGFscmVhZHkgaW5zdHJ1bWVudGVkIHRo ZSBkcml2ZXIgY29kZSBhbmQgZm91bmQgdGhlIGNvZGUgcGF0aAo+IGZvciB0aGUgdW5hbGlnbmVk IGFjY2Vzc2VzLiBXZeKAmWxsIGZpeCB0aGlzIGlzc3VlIGlmIGl04oCZcyBub3QKPiBmb2xsb3dp bmcgV0Mgc2VtYW50aWNzLgo+IAo+IEZpeGluZyB0aGUgcGVyZm9ybWFuY2UgY29uY2VybiB3aWxs IGJlIHVuZGVyIEtWTSBzdGFnZS0yIHBhZ2UtdGFibGUKPiBjb250cm9sLiBXZSdyZSBsb29raW5n IGZvciBhIGd1aWRhbmNlL3NvbHV0aW9uIGZvciB1cGRhdGluZyBzdGFnZS0ywqAKPiBQVEUgYmFz ZWQgb24gUENJLUJBUiBhdHRyaWJ1dGUuCgpCZWZvcmUgd2Ugc3RhcnQgZGlzY3Vzc2luZyB0aGUg KmhvdyosIEknZCBsaWtlIHRvIGNsZWFybHkgdW5kZXJzdGFuZAp3aGF0ICphcm02NCogbWVtb3J5 IGF0dHJpYnV0ZXMgeW91IGFyZSByZWx5aW5nIG9uLiBXZSBhbHJlYWR5IGhhdmUKZXN0YWJsaXNo ZWQgdGhhdCB0aGUgdW5hbGlnbmVkIGFjY2VzcyB3YXMgYSBidWcsIHdoaWNoIHdhcyB0aGUgYmln Z2VzdAphcmd1bWVudCBpbiBmYXZvdXIgb2YgTk9STUFMX05DLiBXaGF0IGFyZSB0aGUgb3RoZXIg cmVxdWlyZW1lbnRzPwoKVGhhbmtzLAoKCU0uCgotLSAKV2l0aG91dCBkZXZpYXRpb24gZnJvbSB0 aGUgbm9ybSwgcHJvZ3Jlc3MgaXMgbm90IHBvc3NpYmxlLgoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QK bGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRl YWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=