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authorAlexander Gordeev <agordeev@linux.ibm.com>2021-02-08 16:01:17 +0100
committerVasily Gorbik <gor@linux.ibm.com>2021-10-26 15:21:28 +0200
commitada1da31ce34248bc97ca8f801f2cf6efa378a81 (patch)
treedcde2e61a606ebe5ce9b84d40bdd0ecf2c5be6f8 /arch/s390
parentdd9089b65407756e3490ab2737373f957a650375 (diff)
s390/sclp: sort out physical vs virtual pointers usage
Provide physical addresses whenever the hardware interface expects it or a 32-bit value used for tracking. Variable sclp_early_sccb gets initialized in the decompressor and points to an address in physcal memory. Yet, it is used as virtual memory pointer and therefore should be converted. Note, the other two __bootdata variables sclp_info_sccb and sclp_info_sccb_valid contain plain data, but no pointers and do need any special care. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/sclp.h1
-rw-r--r--arch/s390/kernel/early.c1
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index e3ae937bef1c..c68ea35de498 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -117,6 +117,7 @@ struct zpci_report_error_header {
extern char *sclp_early_sccb;
+void sclp_early_adjust_va(void);
void sclp_early_set_buffer(void *sccb);
int sclp_early_read_info(void);
int sclp_early_read_storage_info(void);
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 9857cb046726..ba3ace5ac73c 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -296,6 +296,7 @@ static void __init check_image_bootable(void)
void __init startup_init(void)
{
+ sclp_early_adjust_va();
reset_tod_clock();
check_image_bootable();
time_early_init();