The patch titled
Subject: ipmi: add new kernel options to prevent automatic ipmi init
has been added to the -mm tree. Its filename is
ipmi-add-new-kernel-options-to-prevent-automatic-ipmi-init.patch
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------------------------------------------------------
From: Corey Minyard <cminyard@xxxxxxxxxx>
Subject: ipmi: add new kernel options to prevent automatic ipmi init
The configuration change building ipmi_si into the kernel precludes the
use of a custom driver that can utilize more than one KCS interface,
multiple IPMBs, and more than one BMC. This capability is important for
fault-tolerant systems.
Even if the kernel option ipmi_si.trydefaults=0 is specified, ipmi_si
discovers and claims one of the KCS interfaces on a Stratus server. The
inability to now prevent the kernel from managing this device is a
regression from previous kernels. The regression breaks a capability
fault-tolerant vendors have relied upon.
To support both ACPI opregion access and the need to avoid activation of
ipmi_si on some platforms, we've added two new kernel options,
ipmi_si.tryacpi and ipmi_si.trydmi be added to prevent ipmi_si from
initializing when these options are set to 0 on the kernel command line.
With these options at the default value of 1, ipmi_si init proceeds
according to the kernel default.
Tested-by: Jim Paradis <jparadis@xxxxxxxxxx>
Signed-off-by: Robert Evans <Robert.Evans@xxxxxxxxxxx>
Signed-off-by: Jim Paradis <jparadis@xxxxxxxxxx>
Signed-off-by: Tony Camuso <tcamuso@xxxxxxxxxx>
Signed-off-by: Corey Minyard <cminyard@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/char/ipmi/ipmi_si_intf.c | 28 ++++++++++++++++++++++++----
1 file changed, 24 insertions(+), 4 deletions(-)
diff -puN drivers/char/ipmi/ipmi_si_intf.c~ipmi-add-new-kernel-options-to-prevent-automatic-ipmi-init drivers/char/ipmi/ipmi_si_intf.c
--- a/drivers/char/ipmi/ipmi_si_intf.c~ipmi-add-new-kernel-options-to-prevent-automatic-ipmi-init
+++ a/drivers/char/ipmi/ipmi_si_intf.c
@@ -1208,6 +1208,12 @@ static int smi_num; /* Used to sequence
#define DEFAULT_REGSPACING 1
#define DEFAULT_REGSIZE 1
+#ifdef CONFIG_ACPI
+static bool si_tryacpi = 1;
+#endif
+#ifdef CONFIG_DMI
+static bool si_trydmi = 1;
+#endif
static bool si_trydefaults = 1;
static char *si_type[SI_MAX_PARMS];
#define MAX_SI_TYPE_STR 30
@@ -1238,6 +1244,16 @@ MODULE_PARM_DESC(hotmod, "Add and remove
" Documentation/IPMI.txt in the kernel sources for the"
" gory details.");
+#ifdef CONFIG_ACPI
+module_param_named(tryacpi, si_tryacpi, bool, 0);
+MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
+ " default scan of the interfaces identified via ACPI");
+#endif
+#ifdef CONFIG_DMI
+module_param_named(trydmi, si_trydmi, bool, 0);
+MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
+ " default scan of the interfaces identified via DMI");
+#endif
module_param_named(trydefaults, si_trydefaults, bool, 0);
MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
" default scan of the KCS and SMIC interface at the standard"
@@ -3408,16 +3424,20 @@ static int init_ipmi_si(void)
#endif
#ifdef CONFIG_ACPI
- pnp_register_driver(&ipmi_pnp_driver);
- pnp_registered = 1;
+ if (si_tryacpi) {
+ pnp_register_driver(&ipmi_pnp_driver);
+ pnp_registered = 1;
+ }
#endif
#ifdef CONFIG_DMI
- dmi_find_bmc();
+ if (si_trydmi)
+ dmi_find_bmc();
#endif
#ifdef CONFIG_ACPI
- spmi_find_bmc();
+ if (si_tryacpi)
+ spmi_find_bmc();
#endif
/* We prefer devices with interrupts, but in the case of a machine
_
Patches currently in -mm which might be from cminyard@xxxxxxxxxx are
ipmi-remove-superfluous-kernel-userspace-explanation.patch
ipmi-add-new-kernel-options-to-prevent-automatic-ipmi-init.patch
ipmi-add-options-to-disable-openfirmware-and-pci-scanning.patch
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