mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 22:02:28 +00:00
2ab2d5794f
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
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright 2006 Michael Ellerman, IBM Corporation
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <asm/machdep.h>
|
|
#include <asm/page.h>
|
|
#include <asm/firmware.h>
|
|
#include <asm/kexec.h>
|
|
#include <asm/xics.h>
|
|
#include <asm/xive.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/plpar_wrappers.h>
|
|
|
|
#include "pseries.h"
|
|
|
|
void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
|
|
{
|
|
/*
|
|
* Don't risk a hypervisor call if we're crashing
|
|
* XXX: Why? The hypervisor is not crashing. It might be better
|
|
* to at least attempt unregister to avoid the hypervisor stepping
|
|
* on our memory.
|
|
*/
|
|
if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
|
|
int ret;
|
|
int cpu = smp_processor_id();
|
|
int hwcpu = hard_smp_processor_id();
|
|
|
|
if (get_lppaca()->dtl_enable_mask) {
|
|
ret = unregister_dtl(hwcpu);
|
|
if (ret) {
|
|
pr_err("WARNING: DTL deregistration for cpu "
|
|
"%d (hw %d) failed with %d\n",
|
|
cpu, hwcpu, ret);
|
|
}
|
|
}
|
|
|
|
ret = unregister_slb_shadow(hwcpu);
|
|
if (ret) {
|
|
pr_err("WARNING: SLB shadow buffer deregistration "
|
|
"for cpu %d (hw %d) failed with %d\n",
|
|
cpu, hwcpu, ret);
|
|
}
|
|
|
|
ret = unregister_vpa(hwcpu);
|
|
if (ret) {
|
|
pr_err("WARNING: VPA deregistration for cpu %d "
|
|
"(hw %d) failed with %d\n", cpu, hwcpu, ret);
|
|
}
|
|
}
|
|
|
|
if (xive_enabled()) {
|
|
xive_teardown_cpu();
|
|
|
|
if (!secondary)
|
|
xive_shutdown();
|
|
} 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);
|
|
}
|