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authorSuraj Jitindar Singh <sjitindarsingh@gmail.com>2017-02-28 17:03:47 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-03-06 21:44:08 +1100
commit12cc9fd6b2d8ee307a735b3b9faed0d17b719463 (patch)
tree8af6ff63d0cf4b3fa2fbaf1bbd6ef0481b4c073f /arch/powerpc/kernel
parenta69e2fb70350a66f91175cd2625f1e8215c5b6e9 (diff)
downloadblackbird-op-linux-12cc9fd6b2d8ee307a735b3b9faed0d17b719463.tar.gz
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powerpc: Parse the command line before calling CAS
On POWER9 the hypervisor requires the guest to decide whether it would like to use a hash or radix mmu model at the time it calls ibm,client-architecture-support (CAS) based on what the hypervisor has said it's allowed to do. It is possible to disable radix by passing "disable_radix" on the command line. The next patch will add support for the new CAS format, thus we need to parse the command line before calling CAS so we can correctly select which mmu we would like to use. Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/prom_init.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index a3944540fe0d..bf3966d12565 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2993,6 +2993,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
*/
prom_check_initrd(r3, r4);
+ /*
+ * Do early parsing of command line
+ */
+ early_cmdline_parse();
+
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
/*
* On pSeries, inform the firmware about our capabilities
@@ -3009,11 +3014,6 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
copy_and_flush(0, kbase, 0x100, 0);
/*
- * Do early parsing of command line
- */
- early_cmdline_parse();
-
- /*
* Initialize memory management within prom_init
*/
prom_init_mem();
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