lkml.org 
[lkml]   [2021]   [Oct]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[tip: x86/fpu] x86/msr-index: Add MSRs for XFD
    The following commit has been merged into the x86/fpu branch of tip:

    Commit-ID: dae1bd58389615d401a84aedc38fa075ef8f7de6
    Gitweb: https://git.kernel.org/tip/dae1bd58389615d401a84aedc38fa075ef8f7de6
    Author: Chang S. Bae <chang.seok.bae@intel.com>
    AuthorDate: Thu, 21 Oct 2021 15:55:17 -07:00
    Committer: Borislav Petkov <bp@suse.de>
    CommitterDate: Tue, 26 Oct 2021 10:18:09 +02:00

    x86/msr-index: Add MSRs for XFD

    XFD introduces two MSRs:

    - IA32_XFD to enable/disable a feature controlled by XFD

    - IA32_XFD_ERR to expose to the #NM trap handler which feature
    was tried to be used for the first time.

    Both use the same xstate-component bitmap format, used by XCR0.

    Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
    Signed-off-by: Borislav Petkov <bp@suse.de>
    Link: https://lkml.kernel.org/r/20211021225527.10184-14-chang.seok.bae@intel.com
    ---
    arch/x86/include/asm/msr-index.h | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
    index a7c4134..01e2650 100644
    --- a/arch/x86/include/asm/msr-index.h
    +++ b/arch/x86/include/asm/msr-index.h
    @@ -625,6 +625,8 @@

    #define MSR_IA32_BNDCFGS_RSVD 0x00000ffc

    +#define MSR_IA32_XFD 0x000001c4
    +#define MSR_IA32_XFD_ERR 0x000001c5
    #define MSR_IA32_XSS 0x00000da0

    #define MSR_IA32_APICBASE 0x0000001b
    \
     
     \ /
      Last update: 2021-10-26 18:18    [W:4.100 / U:0.020 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site