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powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used

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commit 3bc8ea8603ae4c1e09aca8de229ad38b8091fcb3 upstream.

If the user choses not to use the mitigations, replace
the code sequence with nops.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Diana Craciun 2019-04-29 18:49:01 +03:00 committed by prashantpaddune
parent 6d9d895ee2
commit 804cc27e08
2 changed files with 2 additions and 0 deletions
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1
arch/powerpc/kernel/setup_32.c
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@ -323,6 +323,7 @@ void __init setup_arch(char **cmdline_p)
if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab); if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
setup_barrier_nospec(); setup_barrier_nospec();
setup_spectre_v2();
paging_init(); paging_init();

1
arch/powerpc/kernel/setup_64.c
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@ -737,6 +737,7 @@ void __init setup_arch(char **cmdline_p)
ppc_md.setup_arch(); ppc_md.setup_arch();
setup_barrier_nospec(); setup_barrier_nospec();
setup_spectre_v2();
paging_init(); paging_init();