linux-kernel - Re: [PATCH 1/2 RESEND v10] x86/mm, resource: add a new I/O resource descriptor 'IORES_DESC

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Message-ID: <20190402124328.GG6826@zn.tnic>
Date:   Tue, 2 Apr 2019 14:43:28 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     lijiang <lijiang@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
        tglx@...utronix.de, mingo@...hat.com, akpm@...ux-foundation.org,
        dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org,
        x86@...nel.org, hpa@...or.com, dyoung@...hat.com, bhe@...hat.com,
        Thomas.Lendacky@....com
Subject: Re: [PATCH 1/2 RESEND v10] x86/mm, resource: add a new I/O resource
 descriptor 'IORES_DESC_RESERVED'

On Tue, Apr 02, 2019 at 08:02:04PM +0800, lijiang wrote:
> These regions(E820_TYPE_{RESERVED_KERN,RAM,UNUSABLE}) are still marked as
> IORES_DESC_NONE and should not be mapped encrypted when using ioremap().

Seems to me like we're going in circles. You said here:

https://lkml.kernel.org/r/9eb61523-7a08-24c4-ac15-050537bd9203@redhat.com

that the kernel doesn't pass the e820 reserved ranges to the second
kernel.

I suggested to use a special IORES descriptor for them -
IORES_DES_RESERVED.

Now you say that that is not enough and some of those you want passed,
are still marked as IORES_DESC_NONE.

Sounds to me like you need try again.

-- 
Regards/Gruss,
    Boris.

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