kernel/linux.git/arch/powerpc/lib/test-code-patching.c, branch v6.6.132Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v6.6.1322021-12-23T11:36:58+00:00powerpc/code-patching: Replace patch_instruction() by ppc_inst_write() in selftests2021-12-23T11:36:58+00:00Christophe Leroychristophe.leroy@csgroup.eu2021-12-02T12:00:27+00:00urn:sha1:309a0a601864831510209531dd72da486225d8ae
The purpose of selftests is to check that instructions are
properly formed. Not to check that they properly run.
For that test it uses normal memory, not special test
memory.
In preparation of a future patch enforcing patch_instruction()
to be used only on valid text areas, implement a ppc_inst_write()
instruction which is the complement of ppc_inst_read(). This
new function writes the formated instruction in valid kernel
memory and doesn't bother about icache.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7cf5335cc07ca9b6f8cdaa20ca9887fce4df3bea.1638446239.git.christophe.leroy@csgroup.eu
powerpc/code-patching: Move code patching selftests in its own file2021-12-23T11:36:58+00:00Christophe Leroychristophe.leroy@csgroup.eu2021-12-02T12:00:26+00:00urn:sha1:f30a578d7653f7dbb253a20daad4bcd9f881d6c9
Code patching selftests are half of code-patching.c.
As they are guarded by CONFIG_CODE_PATCHING_SELFTESTS,
they'd be better in their own file.
Also add a missing __init for instr_is_branch_to_addr()
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c0c30504f04eb546a48ff77127a8bccd12a3d809.1638446239.git.christophe.leroy@csgroup.eu