kernel/linux.git/arch/powerpc/lib/test-code-patching.c, branch v6.12.80Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v6.12.802024-08-21T10:15:13+00:00powerpc/code-patching: Add boot selftest for data patching2024-08-21T10:15:13+00:00Benjamin Graybgray@linux.ibm.com2024-05-15T02:44:45+00:00urn:sha1:b7d47339d00d89af559a7068f4a640fc828177ad
Extend the code patching selftests with some basic coverage of the new
data patching variants too.
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Reviewed-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240515024445.236364-6-bgray@linux.ibm.com
powerpc/code-patching: Test patch_instructions() during boot2024-05-07T14:35:42+00:00Benjamin Graybgray@linux.ibm.com2024-03-25T05:28:14+00:00urn:sha1:c5ef5e35844ad30503c49802b9d6a6c818fca886
patch_instructions() introduces new behaviour with a couple of
variations. Test each case of
* a repeated 32-bit instruction,
* a repeated 64-bit instruction (ppc64), and
* a copied sequence of instructions
for both on a single page and when it crosses a page boundary.
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240325052815.854044-1-bgray@linux.ibm.com
powerpc/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