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s390/protvirt: add memory sharing for diag 308 set/store 

Add sharing of ipl parameter block for diag 308 set/store calls to allow
kvm access in protected virtualization environment.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
hifive-unleashed-5.2
Vasily Gorbik 2019-04-01 19:11:04 +02:00 committed by Martin Schwidefsky
parent 5abb9351df
commit db9492cef4
2 changed files with 12 additions and 0 deletions
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3
arch/s390/boot/ipl_parm.c
View File

@ -7,6 +7,7 @@
#include <asm/sections.h>
#include <asm/boot_data.h>
#include <asm/facility.h>
#include <asm/uv.h>
#include "boot.h"
char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
@ -45,7 +46,9 @@ void store_ipl_parmblock(void)
{
int rc;
uv_set_shared(__pa(&ipl_block));
rc = __diag308(DIAG308_STORE, &ipl_block);
uv_remove_shared(__pa(&ipl_block));
if (rc == DIAG308_RC_OK &&
ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION)
ipl_block_valid = 1;

9
arch/s390/kernel/ipl.c
View File

@ -31,6 +31,7 @@
#include <asm/os_info.h>
#include <asm/sections.h>
#include <asm/boot_data.h>
#include <asm/uv.h>
#include "entry.h"
#define IPL_PARM_BLOCK_VERSION 0
@ -863,15 +864,21 @@ static void __reipl_run(void *unused)
{
switch (reipl_type) {
case IPL_TYPE_CCW:
uv_set_shared(__pa(reipl_block_ccw));
diag308(DIAG308_SET, reipl_block_ccw);
uv_remove_shared(__pa(reipl_block_ccw));
diag308(DIAG308_LOAD_CLEAR, NULL);
break;
case IPL_TYPE_FCP:
uv_set_shared(__pa(reipl_block_fcp));
diag308(DIAG308_SET, reipl_block_fcp);
uv_remove_shared(__pa(reipl_block_fcp));
diag308(DIAG308_LOAD_CLEAR, NULL);
break;
case IPL_TYPE_NSS:
uv_set_shared(__pa(reipl_block_nss));
diag308(DIAG308_SET, reipl_block_nss);
uv_remove_shared(__pa(reipl_block_nss));
diag308(DIAG308_LOAD_CLEAR, NULL);
break;
case IPL_TYPE_UNKNOWN:
@ -1142,7 +1149,9 @@ static struct kset *dump_kset;
static void diag308_dump(void *dump_block)
{
uv_set_shared(__pa(dump_block));
diag308(DIAG308_SET, dump_block);
uv_remove_shared(__pa(dump_block));
while (1) {
if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
break;