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authorPaul Mackerras <paulus@ozlabs.org>2022-05-19 10:45:21 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2022-05-29 03:30:42 +0300
commit743cdb7bd0f1cb32c03680c8b38257957db2e692 (patch)
tree3e92577127273dacea450e9730296fab7ba65af6 /arch/powerpc
parent6112bd00e84e5dbffebc3c1e908cbe914ca772ee (diff)
downloadlinux-743cdb7bd0f1cb32c03680c8b38257957db2e692.tar.xz
powerpc/kasan: Mark more real-mode code as not to be instrumented
This marks more files and functions that can possibly be called in real mode as not to be instrumented by KASAN. Most were found by inspection, except for get_pseries_errorlog() which was reported as causing a crash in testing. Reported-by: Nageswara R Sastry <rnsastry@linux.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/YoX1kZPnmUX4RZEK@cleo
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/Makefile2
-rw-r--r--arch/powerpc/kernel/rtas.c4
-rw-r--r--arch/powerpc/kexec/crash.c2
-rw-r--r--arch/powerpc/platforms/powernv/Makefile1
4 files changed, 6 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 2e2a2a9bcf43..f91f0f29a566 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -37,6 +37,8 @@ KASAN_SANITIZE_paca.o := n
KASAN_SANITIZE_setup_64.o := n
KASAN_SANITIZE_mce.o := n
KASAN_SANITIZE_mce_power.o := n
+KASAN_SANITIZE_udbg.o := n
+KASAN_SANITIZE_udbg_16550.o := n
# we have to be particularly careful in ppc64 to exclude code that
# runs with translations off, as we cannot access the shadow with
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 9bb43aa53d43..a6fce3106e02 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -993,8 +993,8 @@ int rtas_call_reentrant(int token, int nargs, int nret, int *outputs, ...)
*
* Return: A pointer to the specified errorlog or NULL if not found.
*/
-struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
- uint16_t section_id)
+noinstr struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
+ uint16_t section_id)
{
struct rtas_ext_event_log_v6 *ext_log =
(struct rtas_ext_event_log_v6 *)log->buffer;
diff --git a/arch/powerpc/kexec/crash.c b/arch/powerpc/kexec/crash.c
index d85fa9fc6f3c..80f54723cf6d 100644
--- a/arch/powerpc/kexec/crash.c
+++ b/arch/powerpc/kexec/crash.c
@@ -224,7 +224,7 @@ void crash_kexec_secondary(struct pt_regs *regs)
/* wait for all the CPUs to hit real mode but timeout if they don't come in */
#if defined(CONFIG_SMP) && defined(CONFIG_PPC64)
-static void __maybe_unused crash_kexec_wait_realmode(int cpu)
+noinstr static void __maybe_unused crash_kexec_wait_realmode(int cpu)
{
unsigned int msecs;
int i;
diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile
index 6488b3842199..19f0fc5c6f1b 100644
--- a/arch/powerpc/platforms/powernv/Makefile
+++ b/arch/powerpc/platforms/powernv/Makefile
@@ -4,6 +4,7 @@
# in particular, idle code runs a bunch of things in real mode
KASAN_SANITIZE_idle.o := n
KASAN_SANITIZE_pci-ioda.o := n
+KASAN_SANITIZE_pci-ioda-tce.o := n
# pnv_machine_check_early
KASAN_SANITIZE_setup.o := n