diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-22 00:19:51 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-16 19:44:45 +0200 |
| commit | 22c697163e4d23513133da617c86d4c71ff5bff6 (patch) | |
| tree | d5518b88bf8ba5cd718754a604723757b3d58bac | |
| parent | d04664376129b34dab6607f5cec04748e51e9643 (diff) | |
powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again
commit abf110f3e1cea40f5ea15e85f5d67c39c14568a7 upstream.
For PowerVM migration we want to be able to call setup_rfi_flush()
again after we've migrated the partition.
To support that we need to check that we're not trying to allocate the
fallback flush area after memblock has gone away (i.e., boot-time only).
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/powerpc/include/asm/setup.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 6 |
2 files changed, 6 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/setup.h b/arch/powerpc/include/asm/setup.h index 7916b56f2e60..3733195be997 100644 --- a/arch/powerpc/include/asm/setup.h +++ b/arch/powerpc/include/asm/setup.h @@ -36,7 +36,7 @@ enum l1d_flush_type { L1D_FLUSH_MTTRIG = 0x8, }; -void __init setup_rfi_flush(enum l1d_flush_type, bool enable); +void setup_rfi_flush(enum l1d_flush_type, bool enable); void do_rfi_flush_fixups(enum l1d_flush_type types); #endif /* !__ASSEMBLY__ */ diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 5bb4a6811371..6e9a4c1e8a4d 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -887,6 +887,10 @@ static void init_fallback_flush(void) u64 l1d_size, limit; int cpu; + /* Only allocate the fallback flush area once (at boot time). */ + if (l1d_flush_fallback_area) + return; + l1d_size = ppc64_caches.dsize; limit = min(safe_stack_limit(), ppc64_rma_size); @@ -904,7 +908,7 @@ static void init_fallback_flush(void) } } -void __init setup_rfi_flush(enum l1d_flush_type types, bool enable) +void setup_rfi_flush(enum l1d_flush_type types, bool enable) { if (types & L1D_FLUSH_FALLBACK) { pr_info("rfi-flush: Using fallback displacement flush\n"); |