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author | Michael Ellerman <mpe@ellerman.id.au> | 2017-10-12 12:17:18 +0200 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-10-21 00:33:05 +0200 |
commit | 54820530c5faa9fd78e1c08cb6449100b1a19157 (patch) | |
tree | b7b605fd74c9435143d6c3464d4c829e95ea8141 /samples/timers/.gitignore | |
parent | powerpc: Add PPC_FEATURE2_HTM_NO_SUSPEND (diff) | |
download | linux-54820530c5faa9fd78e1c08cb6449100b1a19157.tar.xz linux-54820530c5faa9fd78e1c08cb6449100b1a19157.zip |
powerpc/powernv: Enable TM without suspend if possible
Some Power9 revisions can run in a mode where TM operates without
suspended state. If we find ourself on a CPU that might be in this
mode, we query OPAL to check, and if so we reenable TM in CPU
features, and enable a new user feature to signal to userspace that we
are in this mode.
We do not enable the "normal" user feature, PPC_FEATURE2_HTM, but we
do enable PPC_FEATURE2_HTM_NOSC because that indicates to userspace
that the kernel will abort transactions on syscall entry, which is
true regardless of the suspend mode.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'samples/timers/.gitignore')
0 files changed, 0 insertions, 0 deletions