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| author | Michal Suchanek <msuchanek@suse.de> | 2018-04-24 06:15:56 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-06-03 12:43:44 +0200 |
| commit | 815069ca57c142eb71d27439bc27f41a433a67b3 (patch) | |
| tree | 776b7b8a934e55dd4aaab3e52051b8e8d895dd2d /arch/powerpc/kernel/module.c | |
| parent | powerpc/64s: Add support for ori barrier_nospec patching (diff) | |
| download | linux-815069ca57c142eb71d27439bc27f41a433a67b3.tar.xz linux-815069ca57c142eb71d27439bc27f41a433a67b3.zip | |
powerpc/64s: Patch barrier_nospec in modules
Note that unlike RFI which is patched only in kernel the nospec state
reflects settings at the time the module was loaded.
Iterating all modules and re-patching every time the settings change
is not implemented.
Based on lwsync patching.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/module.c')
| -rw-r--r-- | arch/powerpc/kernel/module.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/module.c b/arch/powerpc/kernel/module.c index 3f7ba0f5bf29..1b3c6835e730 100644 --- a/arch/powerpc/kernel/module.c +++ b/arch/powerpc/kernel/module.c @@ -72,6 +72,12 @@ int module_finalize(const Elf_Ehdr *hdr, do_feature_fixups(powerpc_firmware_features, (void *)sect->sh_addr, (void *)sect->sh_addr + sect->sh_size); + + sect = find_section(hdr, sechdrs, "__spec_barrier_fixup"); + if (sect != NULL) + do_barrier_nospec_fixups_range(barrier_nospec_enabled, + (void *)sect->sh_addr, + (void *)sect->sh_addr + sect->sh_size); #endif sect = find_section(hdr, sechdrs, "__lwsync_fixup"); |