lkml.org 
[lkml]   [2017]   [Sep]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[Part1 PATCH v5 06/17] x86/mm: Include SEV for encryption memory attribute changes
    Date
    From: Tom Lendacky <thomas.lendacky@amd.com>

    The current code checks only for sme_active() when determining whether
    to perform the encryption attribute change. Include sev_active() in this
    check so that memory attribute changes can occur under SME and SEV.

    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: John Ogness <john.ogness@linutronix.de>
    Cc: Matt Fleming <matt@codeblueprint.co.uk>
    Cc: Laura Abbott <labbott@redhat.com>
    Cc: Dan Williams <dan.j.williams@intel.com>
    Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
    Cc: linux-kernel@vger.kernel.org
    Cc: x86@kernel.org
    Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
    Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
    ---
    arch/x86/mm/pageattr.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
    index dfb7d657cf43..3fe68483463c 100644
    --- a/arch/x86/mm/pageattr.c
    +++ b/arch/x86/mm/pageattr.c
    @@ -1781,8 +1781,8 @@ static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc)
    unsigned long start;
    int ret;

    - /* Nothing to do if the SME is not active */
    - if (!sme_active())
    + /* Nothing to do if memory encryption is not active */
    + if (!mem_encrypt_active())
    return 0;

    /* Should not be working on unaligned addresses */
    --
    2.9.5
    \
     
     \ /
      Last update: 2017-09-27 17:21    [W:2.818 / U:0.908 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site