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s390/kdump: fix virtual vs physical address confusion 

Fix virtual vs physical address confusion (which currently are the same).

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2023-04-03 08:44:38 +02:00 committed by Vasily Gorbik
parent 86295cb453
commit 39218bcf94
1 changed files with 7 additions and 8 deletions
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15
arch/s390/kernel/machine_kexec.c
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@ -29,8 +29,7 @@
#include <asm/nmi.h>
#include <asm/sclp.h>
typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long,
unsigned long);
typedef void (*relocate_kernel_t)(unsigned long, unsigned long, unsigned long);
extern const unsigned char relocate_kernel[];
extern const unsigned long long relocate_kernel_len;
@ -58,7 +57,7 @@ static void __do_machine_kdump(void *image)
* prefix register of this CPU to zero
*/
memcpy(absolute_pointer(__LC_FPREGS_SAVE_AREA),
(void *)(prefix + __LC_FPREGS_SAVE_AREA), 512);
phys_to_virt(prefix + __LC_FPREGS_SAVE_AREA), 512);
__load_psw_mask(PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA);
start_kdump = (void *)((struct kimage *) image)->start;
@ -209,7 +208,7 @@ int machine_kexec_prepare(struct kimage *image)
return -EINVAL;
/* Get the destination where the assembler code should be copied to.*/
reboot_code_buffer = (void *) page_to_phys(image->control_code_page);
reboot_code_buffer = page_to_virt(image->control_code_page);
/* Then copy it */
memcpy(reboot_code_buffer, relocate_kernel, relocate_kernel_len);
@ -249,18 +248,18 @@ void machine_crash_shutdown(struct pt_regs *regs)
*/
static void __do_machine_kexec(void *data)
{
unsigned long diag308_subcode;
relocate_kernel_t data_mover;
unsigned long data_mover, entry, diag308_subcode;
struct kimage *image = data;
data_mover = (relocate_kernel_t) page_to_phys(image->control_code_page);
data_mover = page_to_phys(image->control_code_page);
entry = virt_to_phys(&image->head);
diag308_subcode = DIAG308_CLEAR_RESET;
if (sclp.has_iplcc)
diag308_subcode |= DIAG308_FLAG_EI;
s390_reset_system();
__arch_local_irq_stnsm(0xfb); /* disable DAT - avoid no-execute */
(*data_mover)(&image->head, image->start, diag308_subcode);
(*(relocate_kernel_t)data_mover)(entry, image->start, diag308_subcode);
/* Die if kexec returns */
disabled_wait();