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grub2/0008-IBM-client-architecture-CAS-reboot-support.patch
Peter Jones f4c76c02ae Reconcile even harder, so that it actually works. 
Signed-off-by: Peter Jones <pjones@redhat.com>
2015-07-22 13:12:37 -04:00

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From 13ca7774359074df68cd1042889e44d99f85a695 Mon Sep 17 00:00:00 2001
From: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>
Date: Thu, 20 Sep 2012 18:07:39 -0300
Subject: [PATCH 08/74] IBM client architecture (CAS) reboot support
This is an implementation of IBM client architecture (CAS) reboot for GRUB.
There are cases where the POWER firmware must reboot in order to support
specific features requested by a kernel. The kernel calls
ibm,client-architecture-support and it may either return or reboot with the new
feature set. eg:
Calling ibm,client-architecture-support.../
Elapsed time since release of system processors: 70959 mins 50 secs
Welcome to GRUB!
Instead of return to the GRUB menu, it will check if the flag for CAS reboot is
set. If so, grub will automatically boot the last booted kernel using the same
parameters
---
grub-core/kern/ieee1275/openfw.c | 62 ++++++++++++++++++++++++++++++++++++++++
grub-core/normal/main.c | 19 ++++++++++++
grub-core/script/execute.c | 7 +++++
include/grub/ieee1275/ieee1275.h | 2 ++
4 files changed, 90 insertions(+)
diff --git a/grub-core/kern/ieee1275/openfw.c b/grub-core/kern/ieee1275/openfw.c
index ddb7783..6db8b98 100644
--- a/grub-core/kern/ieee1275/openfw.c
+++ b/grub-core/kern/ieee1275/openfw.c
@@ -561,3 +561,65 @@ grub_ieee1275_canonicalise_devname (const char *path)
return NULL;
}
+/* Check if it's a CAS reboot. If so, set the script to be executed. */
+int
+grub_ieee1275_cas_reboot (char *script)
+{
+ grub_uint32_t ibm_ca_support_reboot;
+ grub_uint32_t ibm_fw_nbr_reboots;
+ char property_value[10];
+ grub_ssize_t actual;
+ grub_ieee1275_ihandle_t options;
+
+ if (grub_ieee1275_finddevice ("/options", &options) < 0)
+ return -1;
+
+ /* Check two properties, one is enough to get cas reboot value */
+ ibm_ca_support_reboot = 0;
+ if (grub_ieee1275_get_integer_property (grub_ieee1275_chosen,
+ "ibm,client-architecture-support-reboot",
+ &ibm_ca_support_reboot,
+ sizeof (ibm_ca_support_reboot),
+ &actual) >= 0)
+ grub_dprintf("ieee1275", "ibm,client-architecture-support-reboot: %u\n",
+ ibm_ca_support_reboot);
+
+ ibm_fw_nbr_reboots = 0;
+ if (grub_ieee1275_get_property (options, "ibm,fw-nbr-reboots",
+ property_value, sizeof (property_value),
+ &actual) >= 0)
+ {
+ property_value[sizeof (property_value) - 1] = 0;
+ ibm_fw_nbr_reboots = (grub_uint8_t) grub_strtoul (property_value, 0, 10);
+ grub_dprintf("ieee1275", "ibm,fw-nbr-reboots: %u\n", ibm_fw_nbr_reboots);
+ }
+
+ if (ibm_ca_support_reboot || ibm_fw_nbr_reboots)
+ {
+ if (! grub_ieee1275_get_property_length (options, "boot-last-label", &actual))
+ {
+ if (actual > 1024)
+ script = grub_realloc (script, actual + 1);
+ grub_ieee1275_get_property (options, "boot-last-label", script, actual,
+ &actual);
+ return 0;
+ }
+ }
+
+ grub_ieee1275_set_boot_last_label ("");
+
+ return -1;
+}
+
+int grub_ieee1275_set_boot_last_label (const char *text)
+{
+ grub_ieee1275_ihandle_t options;
+ grub_ssize_t actual;
+
+ grub_dprintf("ieee1275", "set boot_last_label (size: %u)\n", grub_strlen(text));
+ if (! grub_ieee1275_finddevice ("/options", &options) &&
+ options != (grub_ieee1275_ihandle_t) -1)
+ grub_ieee1275_set_property (options, "boot-last-label", text,
+ grub_strlen (text), &actual);
+ return 0;
+}
diff --git a/grub-core/normal/main.c b/grub-core/normal/main.c
index df12dfb..f805cb3 100644
--- a/grub-core/normal/main.c
+++ b/grub-core/normal/main.c
@@ -33,6 +33,9 @@
#include <grub/charset.h>
#include <grub/script_sh.h>
#include <grub/bufio.h>
+#ifdef GRUB_MACHINE_IEEE1275
+#include <grub/ieee1275/ieee1275.h>
+#endif
GRUB_MOD_LICENSE ("GPLv3+");
@@ -275,6 +278,22 @@ grub_normal_execute (const char *config, int nested, int batch)
{
menu = read_config_file (config);
+#ifdef GRUB_MACHINE_IEEE1275
+ int boot;
+ boot = 0;
+ char *script;
+ script = grub_malloc (1024);
+ if (! grub_ieee1275_cas_reboot (script))
+ {
+ char *dummy[1] = { NULL };
+ if (! grub_script_execute_sourcecode (script, 0, dummy))
+ boot = 1;
+ }
+ grub_free (script);
+ if (boot)
+ grub_command_execute ("boot", 0, 0);
+#endif
+
/* Ignore any error. */
grub_errno = GRUB_ERR_NONE;
}
diff --git a/grub-core/script/execute.c b/grub-core/script/execute.c
index 2b9341f..0f7d143 100644
--- a/grub-core/script/execute.c
+++ b/grub-core/script/execute.c
@@ -27,6 +27,9 @@
#include <grub/normal.h>
#include <grub/extcmd.h>
#include <grub/i18n.h>
+#ifdef GRUB_MACHINE_IEEE1275
+#include <grub/ieee1275/ieee1275.h>
+#endif
/* Max digits for a char is 3 (0xFF is 255), similarly for an int it
is sizeof (int) * 3, and one extra for a possible -ve sign. */
@@ -912,6 +915,10 @@ grub_script_execute_sourcecode (const char *source)
grub_err_t ret = 0;
struct grub_script *parsed_script;
+#ifdef GRUB_MACHINE_IEEE1275
+ grub_ieee1275_set_boot_last_label (source);
+#endif
+
while (source)
{
char *line;
diff --git a/include/grub/ieee1275/ieee1275.h b/include/grub/ieee1275/ieee1275.h
index 8e42513..9f26c69 100644
--- a/include/grub/ieee1275/ieee1275.h
+++ b/include/grub/ieee1275/ieee1275.h
@@ -234,6 +234,8 @@ int EXPORT_FUNC(grub_ieee1275_devalias_next) (struct grub_ieee1275_devalias *ali
void EXPORT_FUNC(grub_ieee1275_children_peer) (struct grub_ieee1275_devalias *alias);
void EXPORT_FUNC(grub_ieee1275_children_first) (const char *devpath,
struct grub_ieee1275_devalias *alias);
+int EXPORT_FUNC(grub_ieee1275_cas_reboot) (char *script);
+int EXPORT_FUNC(grub_ieee1275_set_boot_last_label) (const char *text);
#define FOR_IEEE1275_DEVALIASES(alias) for (grub_ieee1275_devalias_init_iterator (&(alias)); grub_ieee1275_devalias_next (&(alias));)
--
2.4.3
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