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| author |   Russell Currey <ruscur@russell.cc> | 2022-04-04 20:15:35 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-05-22 15:58:28 +1000 |
| commit | 2efee6adb56159288bce9d1ab51fc9056d7007d4 (patch) | |
| tree | 34ba1618b889da0ca1c6dd18ca0b481743dd2149 /drivers/net/netdevsim/git:/ssh:/git@git.zx2c4.com | |
| parent | powerpc/85xx/p2020: Add fsl,mpc8548-pmc node (diff) | |
| download | linux-dev-2efee6adb56159288bce9d1ab51fc9056d7007d4.tar.xz linux-dev-2efee6adb56159288bce9d1ab51fc9056d7007d4.zip | |
powerpc/powernv: Get L1D flush requirements from device-tree
The device-tree properties no-need-l1d-flush-msr-pr-1-to-0 and
no-need-l1d-flush-kernel-on-user-access are the equivalents of
H_CPU_BEHAV_NO_L1D_FLUSH_ENTRY and H_CPU_BEHAV_NO_L1D_FLUSH_UACCESS
from the H_GET_CPU_CHARACTERISTICS hcall on pseries respectively.
In commit d02fa40d759f ("powerpc/powernv: Remove POWER9 PVR version
check for entry and uaccess flushes") the condition for disabling the
L1D flush on kernel entry and user access was changed from any non-P9
CPU to only checking P7 and P8. Without the appropriate device-tree
checks for newer processors on powernv, these flushes are unnecessarily
enabled on those systems. This patch corrects this.
Fixes: d02fa40d759f ("powerpc/powernv: Remove POWER9 PVR version check for entry and uaccess flushes")
Reported-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220404101536.104794-1-ruscur@russell.cc
Diffstat (limited to 'drivers/net/netdevsim/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions