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powerpc: Expose TSCR via sysfs only on powernv

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The TSCR can only be accessed in hypervisor mode.

Fixes: 88b5e12eeb11 ("powerpc: Expose TSCR via sysfs")
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Cyril Bur 2018-02-14 14:27:06 +11:00 committed by Michael Ellerman
parent 694a20dae6
commit c134f0d57a
1 changed files with 4 additions and 2 deletions
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6
arch/powerpc/kernel/sysfs.c
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@ -788,7 +788,8 @@ static int register_cpu_online(unsigned int cpu)
if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
device_create_file(s, &dev_attr_pir);
if (cpu_has_feature(CPU_FTR_ARCH_206))
if (cpu_has_feature(CPU_FTR_ARCH_206) &&
!firmware_has_feature(FW_FEATURE_LPAR))
device_create_file(s, &dev_attr_tscr);
#endif /* CONFIG_PPC64 */
@ -873,7 +874,8 @@ static int unregister_cpu_online(unsigned int cpu)
if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
device_remove_file(s, &dev_attr_pir);
if (cpu_has_feature(CPU_FTR_ARCH_206))
if (cpu_has_feature(CPU_FTR_ARCH_206) &&
!firmware_has_feature(FW_FEATURE_LPAR))
device_remove_file(s, &dev_attr_tscr);
#endif /* CONFIG_PPC64 */