From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shannon Zhao Subject: Re: efi_enabled(EFI_PARAVIRT) use Date: Sun, 1 May 2016 22:36:51 +0800 Message-ID: <57261483.10500@linaro.org> References: <20160429142020.4499e185@canb.auug.org.au> <20160429063936.GA28320@gmail.com> <20160429143931.GG2839@codeblueprint.co.uk> <5724BDD2.5020600@linaro.org> <20160430204420.GM2839@codeblueprint.co.uk> <572576E2.7060508@linaro.org> <20160501132620.GT2839@codeblueprint.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20160501132620.GT2839@codeblueprint.co.uk> Sender: linux-next-owner@vger.kernel.org To: Matt Fleming Cc: Ard Biesheuvel , Stefano Stabellini , Ingo Molnar , Stephen Rothwell , "Luis R. Rodriguez" , Jeremy Fitzhardinge , Konrad Rzeszutek Wilk , Stefano Stabellini , Xen Devel , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Peter Zijlstra , linux-next@vger.kernel.org, "linux-kernel@vger.kernel.org" , Borislav Petkov List-Id: xen-devel@lists.xenproject.org On 2016=E5=B9=B405=E6=9C=8801=E6=97=A5 21:26, Matt Fleming wrote: > On Sun, 01 May, at 11:24:18AM, Shannon Zhao wrote: >> Because the UEFI params for Dom0 are located under /hypervisor/uefi = node >> instead of /chosen. So it needs to check whether it's a Dom0 then se= arch >> and parse different node with different params arrays. > =20 > Why can't you search both nodes?=20 Before searching, it needs to decide which uefi params array should be passed to of_scan_flat_dt(). > Would you ever expect to see both for > a Dom0 kernel? >=20 >> So it still needs add another check to firstly parse the fdt to see = if >> there is "xen,uefi-system-table" under /hypervisor/uefi node, right?= I >> think it's a bit redundant compared with xen_initial_domain(). >=20 > Sometimes you really do need to check xen_initial_domain(), but I do > not think this is such a case. And if we can get by without adding > that check, the code will be better for it. >=20 So is there any other way you suggest? Thanks, --=20 Shannon