diff options
| author |   Daniel Axtens <dja@axtens.net> | 2022-05-18 20:07:05 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-05-22 15:58:29 +1000 |
| commit | 2ab2d5794f14c08676690bf0859f16cc768bb3a4 (patch) | |
| tree | bb031beb53e4a333737ff46270946af6c5e67751 /arch/powerpc/platforms/pseries | |
| parent | powerpc/kasan: Don't instrument non-maskable or raw interrupts (diff) | |
| download | linux-dev-2ab2d5794f14c08676690bf0859f16cc768bb3a4.tar.xz linux-dev-2ab2d5794f14c08676690bf0859f16cc768bb3a4.zip | |
powerpc/kasan: Disable address sanitization in kexec paths
The kexec code paths involve code that necessarily run in real mode, as
CPUs are disabled and control is transferred to the new kernel. Disable
address sanitization for the kexec code and the functions called in real
mode on CPUs being disabled.
[paulus@ozlabs.org: combined a few work-in-progress commits of
Daniel's and wrote the commit message.]
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
[mpe: Move pseries_machine_kexec() into kexec.c so setup.c can be instrumented]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/YoTFSQ2TUSEaDdVC@cleo
Diffstat (limited to 'arch/powerpc/platforms/pseries')
| -rw-r--r-- | arch/powerpc/platforms/pseries/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/kexec.c | 8 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/pseries.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 12 |
4 files changed, 12 insertions, 11 deletions
diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 9764e1a2ed5c..a1fab0955bf4 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -33,3 +33,5 @@ obj-$(CONFIG_SUSPEND) += suspend.o obj-$(CONFIG_PPC_VAS) += vas.o vas-sysfs.o obj-$(CONFIG_ARCH_HAS_CC_PLATFORM) += cc_platform.o + +KASAN_SANITIZE_kexec.o := n diff --git a/arch/powerpc/platforms/pseries/kexec.c b/arch/powerpc/platforms/pseries/kexec.c index 145fcfbc017f..ab6cdbebb35e 100644 --- a/arch/powerpc/platforms/pseries/kexec.c +++ b/arch/powerpc/platforms/pseries/kexec.c @@ -61,3 +61,11 @@ void pseries_kexec_cpu_down(int crash_shutdown, int secondary) } else xics_kexec_teardown_cpu(secondary); } + +void pseries_machine_kexec(struct kimage *image) +{ + if (firmware_has_feature(FW_FEATURE_SET_MODE)) + pseries_disable_reloc_on_exc(); + + default_machine_kexec(image); +} diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h index af162aeeae86..f5c916c839c9 100644 --- a/arch/powerpc/platforms/pseries/pseries.h +++ b/arch/powerpc/platforms/pseries/pseries.h @@ -38,6 +38,7 @@ static inline void smp_init_pseries(void) { } #endif extern void pseries_kexec_cpu_down(int crash_shutdown, int secondary); +void pseries_machine_kexec(struct kimage *image); extern void pSeries_final_fixup(void); diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index a3dab15b0a2f..c9fcc30a0365 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -421,16 +421,6 @@ void pseries_disable_reloc_on_exc(void) } EXPORT_SYMBOL(pseries_disable_reloc_on_exc); -#ifdef CONFIG_KEXEC_CORE -static void pSeries_machine_kexec(struct kimage *image) -{ - if (firmware_has_feature(FW_FEATURE_SET_MODE)) - pseries_disable_reloc_on_exc(); - - default_machine_kexec(image); -} -#endif - #ifdef __LITTLE_ENDIAN__ void pseries_big_endian_exceptions(void) { @@ -1099,7 +1089,7 @@ define_machine(pseries) { .machine_check_exception = pSeries_machine_check_exception, .machine_check_log_err = pSeries_machine_check_log_err, #ifdef CONFIG_KEXEC_CORE - .machine_kexec = pSeries_machine_kexec, + .machine_kexec = pseries_machine_kexec, .kexec_cpu_down = pseries_kexec_cpu_down, #endif #ifdef CONFIG_MEMORY_HOTPLUG |