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powerpc/kasan: Disable address sanitization in kexec paths

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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
This commit is contained in:
Daniel Axtens
2022-05-18 20:07:05 +10:00
committed by Michael Ellerman
parent 5352090a99
commit 2ab2d5794f
7 changed files with 18 additions and 15 deletions
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4
arch/powerpc/sysdev/xive/common.c
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@@ -1241,7 +1241,7 @@ static int xive_setup_cpu_ipi(unsigned int cpu)
return 0;
}
static void xive_cleanup_cpu_ipi(unsigned int cpu, struct xive_cpu *xc)
noinstr static void xive_cleanup_cpu_ipi(unsigned int cpu, struct xive_cpu *xc)
{
unsigned int xive_ipi_irq = xive_ipi_cpu_to_irq(cpu);
@@ -1634,7 +1634,7 @@ void xive_flush_interrupt(void)
#endif /* CONFIG_SMP */
void xive_teardown_cpu(void)
noinstr void xive_teardown_cpu(void)
{
struct xive_cpu *xc = __this_cpu_read(xive_cpu);
unsigned int cpu = smp_processor_id();