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From 3301328699d574c8d6617eb4105cd9d4794f722c Mon Sep 17 00:00:00 2001
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From: Collin Walling <walling@linux.ibm.com>
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Date: Tue, 8 May 2018 09:01:14 +0000
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Subject: pc-bios/s390-ccw: fix loadparm initialization and int conversion
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Rename the loadparm char array in main.c to loadparm_str and
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increased the size by one byte to account for a null termination
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when converting the loadparm string to an int via atoui. We
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also allow the boot menu to be enabled when loadparm is set to
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an empty string or a series of spaces.
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Signed-off-by: Collin Walling <walling@linux.ibm.com>
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Reported-by: Vasily Gorbik <gor@linux.ibm.com>
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Reviewed-by: Thomas Huth <thuth@redhat.com>
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Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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(cherry picked from commit 074afe60d4c8167dcfaee7aca1065c6360449eaa)
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---
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hw/s390x/ipl.c | 4 ++++
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pc-bios/s390-ccw/main.c | 14 +++++++-------
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2 files changed, 11 insertions(+), 7 deletions(-)
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diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
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index fb554ab..150f6c0 100644
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--- a/hw/s390x/ipl.c
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+++ b/hw/s390x/ipl.c
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@@ -373,6 +373,10 @@ int s390_ipl_set_loadparm(uint8_t *loadparm)
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loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
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}
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+ if (i < 8) {
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+ memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
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+ }
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+
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g_free(lp);
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return 0;
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}
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diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
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index 9d9f8cf..26f9adf 100644
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--- a/pc-bios/s390-ccw/main.c
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+++ b/pc-bios/s390-ccw/main.c
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@@ -15,11 +15,11 @@
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char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
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static SubChannelId blk_schid = { .one = 1 };
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IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
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-static char loadparm[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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+static char loadparm_str[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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QemuIplParameters qipl;
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#define LOADPARM_PROMPT "PROMPT "
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-#define LOADPARM_EMPTY "........"
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+#define LOADPARM_EMPTY " "
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#define BOOT_MENU_FLAG_MASK (QIPL_FLAG_BM_OPTS_CMD | QIPL_FLAG_BM_OPTS_ZIPL)
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/*
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@@ -45,7 +45,7 @@ void panic(const char *string)
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unsigned int get_loadparm_index(void)
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{
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- return atoui(loadparm);
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+ return atoui(loadparm_str);
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}
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static bool find_dev(Schib *schib, int dev_no)
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@@ -80,13 +80,13 @@ static bool find_dev(Schib *schib, int dev_no)
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static void menu_setup(void)
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{
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- if (memcmp(loadparm, LOADPARM_PROMPT, 8) == 0) {
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+ if (memcmp(loadparm_str, LOADPARM_PROMPT, 8) == 0) {
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menu_set_parms(QIPL_FLAG_BM_OPTS_CMD, 0);
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return;
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}
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/* If loadparm was set to any other value, then do not enable menu */
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- if (memcmp(loadparm, LOADPARM_EMPTY, 8) != 0) {
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+ if (memcmp(loadparm_str, LOADPARM_EMPTY, 8) != 0) {
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return;
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}
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@@ -116,8 +116,8 @@ static void virtio_setup(void)
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*/
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enable_mss_facility();
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- sclp_get_loadparm_ascii(loadparm);
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- memcpy(ldp + 10, loadparm, 8);
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+ sclp_get_loadparm_ascii(loadparm_str);
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+ memcpy(ldp + 10, loadparm_str, 8);
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sclp_print(ldp);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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--
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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1.8.3.1
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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