linux-kernel - Re: [PATCH v7 03/36] x86, mpparse, x86/acpi, x86/PCI, x86/dmi, SFI: Use memremap for RAM mappings

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Date:   Tue, 20 Jun 2017 09:21:25 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Tom Lendacky <thomas.lendacky@....com>
Cc:     linux-arch@...r.kernel.org, linux-efi@...r.kernel.org,
        kvm@...r.kernel.org, linux-doc@...r.kernel.org, x86@...nel.org,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, xen-devel@...ts.xen.org,
        linux-mm@...ck.org, iommu@...ts.linux-foundation.org,
        Brijesh Singh <brijesh.singh@....com>,
        Toshimitsu Kani <toshi.kani@....com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Alexander Potapenko <glider@...gle.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Larry Woodman <lwoodman@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Joerg Roedel <joro@...tes.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Ingo Molnar <mingo@...hat.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Dave Young <dyoung@...hat.com>, Rik van Riel <riel@...hat.com>,
        Arnd Bergmann <arnd@...db.de>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Andy Lutomirski <luto@...nel.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Juergen Gross <jgross@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH v7 03/36] x86, mpparse, x86/acpi, x86/PCI, x86/dmi, SFI:
 Use memremap for RAM mappings

On Fri, Jun 16, 2017 at 01:50:23PM -0500, Tom Lendacky wrote:
> The ioremap() function is intended for mapping MMIO. For RAM, the
> memremap() function should be used. Convert calls from ioremap() to
> memremap() when re-mapping RAM.
> 
> This will be used later by SME to control how the encryption mask is
> applied to memory mappings, with certain memory locations being mapped
> decrypted vs encrypted.
> 
> Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
> ---
>  arch/x86/include/asm/dmi.h   |    8 ++++----
>  arch/x86/kernel/acpi/boot.c  |    6 +++---
>  arch/x86/kernel/kdebugfs.c   |   34 +++++++++++-----------------------
>  arch/x86/kernel/ksysfs.c     |   28 ++++++++++++++--------------
>  arch/x86/kernel/mpparse.c    |   10 +++++-----
>  arch/x86/pci/common.c        |    4 ++--
>  drivers/firmware/dmi-sysfs.c |    5 +++--
>  drivers/firmware/pcdp.c      |    4 ++--
>  drivers/sfi/sfi_core.c       |   22 +++++++++++-----------
>  9 files changed, 55 insertions(+), 66 deletions(-)

Reviewed-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

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