diff options
author | David Woodhouse <dwmw@amazon.co.uk> | 2018-07-14 02:35:12 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-25 10:18:25 +0200 |
commit | ec5bf1a308faac133951877c8b5fbbb0413529cb (patch) | |
tree | d26f25a5198f5214f1aa30d090fc7266055ba0f2 /kernel | |
parent | d9a58c4316857347b0ef77e94bde43379c87a746 (diff) |
x86/bugs/AMD: Add support to disable RDS on Fam[15, 16, 17]h if requested
commit 764f3c21588a059cd783c6ba0734d4db2d72822d upstream
AMD does not need the Speculative Store Bypass mitigation to be enabled.
The parameters for this are already available and can be done via MSR
C001_1020. Each family uses a different bit in that MSR for this.
[ tglx: Expose the bit mask via a variable and move the actual MSR fiddling
into the bugs code as that's the right thing to do and also required
to prepare for dynamic enable/disable ]
[ Srivatsa: Removed __ro_after_init for 4.4.y ]
Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com>
Reviewed-by: Alexey Makhalov <amakhalov@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions