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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2022-06-11 17:10:15 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-29 08:58:50 +0200 |
| commit | ceda71d49f6b397b2046c7e387ec16cf5adf4d0c (patch) | |
| tree | 7265f0a9360dceb37df5df5d39acad13fc1bd78a | |
| parent | kbuild: link vmlinux only once for CONFIG_TRIM_UNUSED_KSYMS (2nd attempt) (diff) | |
| download | wireguard-linux-ceda71d49f6b397b2046c7e387ec16cf5adf4d0c.tar.xz wireguard-linux-ceda71d49f6b397b2046c7e387ec16cf5adf4d0c.zip | |
powerpc/pseries: wire up rng during setup_arch()
commit e561e472a3d441753bd012333b057f48fef1045b upstream.
The platform's RNG must be available before random_init() in order to be
useful for initial seeding, which in turn means that it needs to be
called from setup_arch(), rather than from an init call. Fortunately,
each platform already has a setup_arch function pointer, which means
it's easy to wire this up. This commit also removes some noisy log
messages that don't add much.
Fixes: a489043f4626 ("powerpc/pseries: Implement arch_get_random_long() based on H_RANDOM")
Cc: stable@vger.kernel.org # v3.13+
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220611151015.548325-4-Jason@zx2c4.com
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/powerpc/platforms/pseries/pseries.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/rng.c | 11 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 2 |
3 files changed, 7 insertions, 8 deletions
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h index 13fa370a87e4..5fd56230b01c 100644 --- a/arch/powerpc/platforms/pseries/pseries.h +++ b/arch/powerpc/platforms/pseries/pseries.h @@ -114,4 +114,6 @@ int dlpar_workqueue_init(void); void pseries_setup_rfi_flush(void); void pseries_lpar_read_hblkrm_characteristics(void); +void pseries_rng_init(void); + #endif /* _PSERIES_PSERIES_H */ diff --git a/arch/powerpc/platforms/pseries/rng.c b/arch/powerpc/platforms/pseries/rng.c index 6268545947b8..6ddfdeaace9e 100644 --- a/arch/powerpc/platforms/pseries/rng.c +++ b/arch/powerpc/platforms/pseries/rng.c @@ -10,6 +10,7 @@ #include <asm/archrandom.h> #include <asm/machdep.h> #include <asm/plpar_wrappers.h> +#include "pseries.h" static int pseries_get_random_long(unsigned long *v) @@ -24,19 +25,13 @@ static int pseries_get_random_long(unsigned long *v) return 0; } -static __init int rng_init(void) +void __init pseries_rng_init(void) { struct device_node *dn; dn = of_find_compatible_node(NULL, NULL, "ibm,random"); if (!dn) - return -ENODEV; - - pr_info("Registering arch random hook.\n"); - + return; ppc_md.get_random_seed = pseries_get_random_long; - of_node_put(dn); - return 0; } -machine_subsys_initcall(pseries, rng_init); diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 16b744646ea9..d5abb25865e3 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -792,6 +792,8 @@ static void __init pSeries_setup_arch(void) if (swiotlb_force == SWIOTLB_FORCE) ppc_swiotlb_enable = 1; + + pseries_rng_init(); } static void pseries_panic(char *str) |