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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2018-04-02 10:33:37 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-04-03 14:50:07 +0300 |
| commit | a6201da34ff9366680e97392efd06abb9ff15014 (patch) | |
| tree | dd37b085b94c193e288bdc4a1e223dbcc71b6ee7 /arch/powerpc/include/asm/spinlock.h | |
| parent | 19e68b2aec3c0a2bd770d3c358a296a1849f308a (diff) | |
| download | linux-a6201da34ff9366680e97392efd06abb9ff15014.tar.xz | |
powerpc: Fix oops due to bad access of lppaca on bare metal
Commit 8e0b634b1327 ("powerpc/64s: Do not allocate lppaca if we are
not virtualized") removed allocation of lppaca on bare metal
platforms. But with CONFIG_PPC_SPLPAR enabled, we still access the
lppaca on bare metal in some code paths.
Fix this but adding runtime checks for SPLPAR (shared processor LPAR).
Fixes: 8e0b634b1327 ("powerpc/64s: Do not allocate lppaca if we are not virtualized")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/spinlock.h')
| -rw-r--r-- | arch/powerpc/include/asm/spinlock.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h index b9ebc3085fb7..72dc4ddc2972 100644 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -56,6 +56,8 @@ #define vcpu_is_preempted vcpu_is_preempted static inline bool vcpu_is_preempted(int cpu) { + if (!firmware_has_feature(FW_FEATURE_SPLPAR)) + return false; return !!(be32_to_cpu(lppaca_of(cpu).yield_count) & 1); } #endif |