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| author | Alastair D'Silva <alastair@d-silva.org> | 2018-05-11 09:12:57 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-06-03 13:40:31 +0300 |
| commit | 819844285ef2b5d15466f5b5062514135ffba06c (patch) | |
| tree | c72b6e74646cb19cace8d1920c34dc2ae5176c63 /arch/powerpc/kernel/dt_cpu_ftrs.c | |
| parent | 56c0b48b1e443efa5d6f4d60513302c934e55b17 (diff) | |
| download | linux-819844285ef2b5d15466f5b5062514135ffba06c.tar.xz | |
powerpc: Add TIDR CPU feature for POWER9
This patch adds a CPU feature bit to show whether the CPU has
the TIDR register available, enabling as_notify/wait in userspace.
Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/dt_cpu_ftrs.c')
| -rw-r--r-- | arch/powerpc/kernel/dt_cpu_ftrs.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c index c904477abaf3..4be1c0de9406 100644 --- a/arch/powerpc/kernel/dt_cpu_ftrs.c +++ b/arch/powerpc/kernel/dt_cpu_ftrs.c @@ -717,6 +717,7 @@ static __init void cpufeatures_cpu_quirks(void) if ((version & 0xffff0000) == 0x004e0000) { cur_cpu_spec->cpu_features &= ~(CPU_FTR_DAWR); cur_cpu_spec->cpu_features |= CPU_FTR_P9_TLBIE_BUG; + cur_cpu_spec->cpu_features |= CPU_FTR_P9_TIDR; } /* |