2008-07-11 02:16:59 +08:00
|
|
|
#include <linux/threads.h>
|
|
|
|
#include <linux/cpumask.h>
|
|
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/ctype.h>
|
|
|
|
#include <linux/init.h>
|
2008-07-22 13:08:21 +08:00
|
|
|
#include <linux/dmar.h>
|
|
|
|
|
2008-07-11 02:16:59 +08:00
|
|
|
#include <asm/smp.h>
|
2011-05-20 07:45:50 +08:00
|
|
|
#include <asm/x2apic.h>
|
2008-07-11 02:16:59 +08:00
|
|
|
|
2009-02-22 06:23:21 +08:00
|
|
|
int x2apic_phys;
|
2008-07-22 13:08:21 +08:00
|
|
|
|
2011-05-21 08:51:20 +08:00
|
|
|
static struct apic apic_x2apic_phys;
|
|
|
|
|
2008-07-22 13:08:21 +08:00
|
|
|
static int set_x2apic_phys_mode(char *arg)
|
|
|
|
{
|
|
|
|
x2apic_phys = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
early_param("x2apic_phys", set_x2apic_phys_mode);
|
|
|
|
|
x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems
When a HP ProLiant DL980 G7 Server boots a regular kernel,
there will be intermittent lost interrupts which could
result in a hang or (in extreme cases) data loss.
The reason is that this system only supports x2apic physical
mode, while the kernel boots with a logical-cluster default
setting.
This bug can be worked around by specifying the "x2apic_phys" or
"nox2apic" boot option, but we want to handle this system
without requiring manual workarounds.
The BIOS sets ACPI_FADT_APIC_PHYSICAL in FADT table.
As all apicids are smaller than 255, BIOS need to pass the
control to the OS with xapic mode, according to x2apic-spec,
chapter 2.9.
Current code handle x2apic when BIOS pass with xapic mode
enabled:
When user specifies x2apic_phys, or FADT indicates PHYSICAL:
1. During madt oem check, apic driver is set with xapic logical
or xapic phys driver at first.
2. enable_IR_x2apic() will enable x2apic_mode.
3. if user specifies x2apic_phys on the boot line, x2apic_phys_probe()
will install the correct x2apic phys driver and use x2apic phys mode.
Otherwise it will skip the driver will let x2apic_cluster_probe to
take over to install x2apic cluster driver (wrong one) even though FADT
indicates PHYSICAL, because x2apic_phys_probe does not check
FADT PHYSICAL.
Add checking x2apic_fadt_phys in x2apic_phys_probe() to fix the
problem.
Signed-off-by: Stoney Wang <song-bo.wang@hp.com>
[ updated the changelog and simplified the code ]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/1360263182-16226-1-git-send-email-yinghai@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-02-08 02:53:02 +08:00
|
|
|
static bool x2apic_fadt_phys(void)
|
2008-07-22 13:08:21 +08:00
|
|
|
{
|
x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems
When a HP ProLiant DL980 G7 Server boots a regular kernel,
there will be intermittent lost interrupts which could
result in a hang or (in extreme cases) data loss.
The reason is that this system only supports x2apic physical
mode, while the kernel boots with a logical-cluster default
setting.
This bug can be worked around by specifying the "x2apic_phys" or
"nox2apic" boot option, but we want to handle this system
without requiring manual workarounds.
The BIOS sets ACPI_FADT_APIC_PHYSICAL in FADT table.
As all apicids are smaller than 255, BIOS need to pass the
control to the OS with xapic mode, according to x2apic-spec,
chapter 2.9.
Current code handle x2apic when BIOS pass with xapic mode
enabled:
When user specifies x2apic_phys, or FADT indicates PHYSICAL:
1. During madt oem check, apic driver is set with xapic logical
or xapic phys driver at first.
2. enable_IR_x2apic() will enable x2apic_mode.
3. if user specifies x2apic_phys on the boot line, x2apic_phys_probe()
will install the correct x2apic phys driver and use x2apic phys mode.
Otherwise it will skip the driver will let x2apic_cluster_probe to
take over to install x2apic cluster driver (wrong one) even though FADT
indicates PHYSICAL, because x2apic_phys_probe does not check
FADT PHYSICAL.
Add checking x2apic_fadt_phys in x2apic_phys_probe() to fix the
problem.
Signed-off-by: Stoney Wang <song-bo.wang@hp.com>
[ updated the changelog and simplified the code ]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/1360263182-16226-1-git-send-email-yinghai@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-02-08 02:53:02 +08:00
|
|
|
if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) &&
|
|
|
|
(acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
|
2012-04-25 08:23:56 +08:00
|
|
|
printk(KERN_DEBUG "System requires x2apic physical mode\n");
|
x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems
When a HP ProLiant DL980 G7 Server boots a regular kernel,
there will be intermittent lost interrupts which could
result in a hang or (in extreme cases) data loss.
The reason is that this system only supports x2apic physical
mode, while the kernel boots with a logical-cluster default
setting.
This bug can be worked around by specifying the "x2apic_phys" or
"nox2apic" boot option, but we want to handle this system
without requiring manual workarounds.
The BIOS sets ACPI_FADT_APIC_PHYSICAL in FADT table.
As all apicids are smaller than 255, BIOS need to pass the
control to the OS with xapic mode, according to x2apic-spec,
chapter 2.9.
Current code handle x2apic when BIOS pass with xapic mode
enabled:
When user specifies x2apic_phys, or FADT indicates PHYSICAL:
1. During madt oem check, apic driver is set with xapic logical
or xapic phys driver at first.
2. enable_IR_x2apic() will enable x2apic_mode.
3. if user specifies x2apic_phys on the boot line, x2apic_phys_probe()
will install the correct x2apic phys driver and use x2apic phys mode.
Otherwise it will skip the driver will let x2apic_cluster_probe to
take over to install x2apic cluster driver (wrong one) even though FADT
indicates PHYSICAL, because x2apic_phys_probe does not check
FADT PHYSICAL.
Add checking x2apic_fadt_phys in x2apic_phys_probe() to fix the
problem.
Signed-off-by: Stoney Wang <song-bo.wang@hp.com>
[ updated the changelog and simplified the code ]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/1360263182-16226-1-git-send-email-yinghai@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-02-08 02:53:02 +08:00
|
|
|
return true;
|
2012-04-25 08:23:56 +08:00
|
|
|
}
|
x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems
When a HP ProLiant DL980 G7 Server boots a regular kernel,
there will be intermittent lost interrupts which could
result in a hang or (in extreme cases) data loss.
The reason is that this system only supports x2apic physical
mode, while the kernel boots with a logical-cluster default
setting.
This bug can be worked around by specifying the "x2apic_phys" or
"nox2apic" boot option, but we want to handle this system
without requiring manual workarounds.
The BIOS sets ACPI_FADT_APIC_PHYSICAL in FADT table.
As all apicids are smaller than 255, BIOS need to pass the
control to the OS with xapic mode, according to x2apic-spec,
chapter 2.9.
Current code handle x2apic when BIOS pass with xapic mode
enabled:
When user specifies x2apic_phys, or FADT indicates PHYSICAL:
1. During madt oem check, apic driver is set with xapic logical
or xapic phys driver at first.
2. enable_IR_x2apic() will enable x2apic_mode.
3. if user specifies x2apic_phys on the boot line, x2apic_phys_probe()
will install the correct x2apic phys driver and use x2apic phys mode.
Otherwise it will skip the driver will let x2apic_cluster_probe to
take over to install x2apic cluster driver (wrong one) even though FADT
indicates PHYSICAL, because x2apic_phys_probe does not check
FADT PHYSICAL.
Add checking x2apic_fadt_phys in x2apic_phys_probe() to fix the
problem.
Signed-off-by: Stoney Wang <song-bo.wang@hp.com>
[ updated the changelog and simplified the code ]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/1360263182-16226-1-git-send-email-yinghai@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-02-08 02:53:02 +08:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
|
|
|
|
{
|
|
|
|
return x2apic_enabled() && (x2apic_phys || x2apic_fadt_phys());
|
2008-07-22 13:08:21 +08:00
|
|
|
}
|
2008-07-11 02:16:59 +08:00
|
|
|
|
2011-05-20 07:45:47 +08:00
|
|
|
static void
|
|
|
|
__x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest)
|
2008-07-11 02:16:59 +08:00
|
|
|
{
|
|
|
|
unsigned long query_cpu;
|
2011-05-20 07:45:47 +08:00
|
|
|
unsigned long this_cpu;
|
2009-01-28 22:42:24 +08:00
|
|
|
unsigned long flags;
|
2008-07-11 02:16:59 +08:00
|
|
|
|
2009-03-18 02:16:54 +08:00
|
|
|
x2apic_wrmsr_fence();
|
|
|
|
|
2008-07-11 02:16:59 +08:00
|
|
|
local_irq_save(flags);
|
2011-05-20 07:45:47 +08:00
|
|
|
|
|
|
|
this_cpu = smp_processor_id();
|
2008-12-17 09:33:59 +08:00
|
|
|
for_each_cpu(query_cpu, mask) {
|
2011-05-20 07:45:47 +08:00
|
|
|
if (apic_dest == APIC_DEST_ALLBUT && this_cpu == query_cpu)
|
|
|
|
continue;
|
2008-07-11 02:16:59 +08:00
|
|
|
__x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu),
|
|
|
|
vector, APIC_DEST_PHYSICAL);
|
|
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
|
|
}
|
|
|
|
|
2011-05-20 07:45:47 +08:00
|
|
|
static void x2apic_send_IPI_mask(const struct cpumask *mask, int vector)
|
|
|
|
{
|
|
|
|
__x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLINC);
|
|
|
|
}
|
|
|
|
|
2009-01-28 22:42:24 +08:00
|
|
|
static void
|
|
|
|
x2apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
|
2008-07-11 02:16:59 +08:00
|
|
|
{
|
2011-05-20 07:45:47 +08:00
|
|
|
__x2apic_send_IPI_mask(mask, vector, APIC_DEST_ALLBUT);
|
2008-12-17 09:33:52 +08:00
|
|
|
}
|
2008-07-11 02:16:59 +08:00
|
|
|
|
2008-12-17 09:33:52 +08:00
|
|
|
static void x2apic_send_IPI_allbutself(int vector)
|
|
|
|
{
|
2011-05-20 07:45:47 +08:00
|
|
|
__x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLBUT);
|
2008-07-11 02:16:59 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void x2apic_send_IPI_all(int vector)
|
|
|
|
{
|
2011-05-20 07:45:47 +08:00
|
|
|
__x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLINC);
|
2008-07-11 02:16:59 +08:00
|
|
|
}
|
|
|
|
|
2008-12-30 00:41:40 +08:00
|
|
|
static void init_x2apic_ldr(void)
|
2008-07-11 02:16:59 +08:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2011-05-20 07:45:46 +08:00
|
|
|
static int x2apic_phys_probe(void)
|
|
|
|
{
|
x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems
When a HP ProLiant DL980 G7 Server boots a regular kernel,
there will be intermittent lost interrupts which could
result in a hang or (in extreme cases) data loss.
The reason is that this system only supports x2apic physical
mode, while the kernel boots with a logical-cluster default
setting.
This bug can be worked around by specifying the "x2apic_phys" or
"nox2apic" boot option, but we want to handle this system
without requiring manual workarounds.
The BIOS sets ACPI_FADT_APIC_PHYSICAL in FADT table.
As all apicids are smaller than 255, BIOS need to pass the
control to the OS with xapic mode, according to x2apic-spec,
chapter 2.9.
Current code handle x2apic when BIOS pass with xapic mode
enabled:
When user specifies x2apic_phys, or FADT indicates PHYSICAL:
1. During madt oem check, apic driver is set with xapic logical
or xapic phys driver at first.
2. enable_IR_x2apic() will enable x2apic_mode.
3. if user specifies x2apic_phys on the boot line, x2apic_phys_probe()
will install the correct x2apic phys driver and use x2apic phys mode.
Otherwise it will skip the driver will let x2apic_cluster_probe to
take over to install x2apic cluster driver (wrong one) even though FADT
indicates PHYSICAL, because x2apic_phys_probe does not check
FADT PHYSICAL.
Add checking x2apic_fadt_phys in x2apic_phys_probe() to fix the
problem.
Signed-off-by: Stoney Wang <song-bo.wang@hp.com>
[ updated the changelog and simplified the code ]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/1360263182-16226-1-git-send-email-yinghai@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-02-08 02:53:02 +08:00
|
|
|
if (x2apic_mode && (x2apic_phys || x2apic_fadt_phys()))
|
2011-05-20 07:45:46 +08:00
|
|
|
return 1;
|
|
|
|
|
|
|
|
return apic == &apic_x2apic_phys;
|
|
|
|
}
|
|
|
|
|
2011-05-21 08:51:20 +08:00
|
|
|
static struct apic apic_x2apic_phys = {
|
2009-01-28 09:37:01 +08:00
|
|
|
|
|
|
|
.name = "physical x2apic",
|
2011-05-20 07:45:46 +08:00
|
|
|
.probe = x2apic_phys_probe,
|
2009-01-28 09:37:01 +08:00
|
|
|
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
|
2012-03-17 03:25:35 +08:00
|
|
|
.apic_id_valid = x2apic_apic_id_valid,
|
2009-01-28 09:37:01 +08:00
|
|
|
.apic_id_registered = x2apic_apic_id_registered,
|
|
|
|
|
2009-01-28 11:02:31 +08:00
|
|
|
.irq_delivery_mode = dest_Fixed,
|
2009-01-28 12:13:04 +08:00
|
|
|
.irq_dest_mode = 0, /* physical */
|
2009-01-28 09:37:01 +08:00
|
|
|
|
2012-06-05 19:23:29 +08:00
|
|
|
.target_cpus = online_target_cpus,
|
2009-01-28 12:08:44 +08:00
|
|
|
.disable_esr = 0,
|
2009-01-28 12:29:25 +08:00
|
|
|
.dest_logical = 0,
|
2009-01-28 09:37:01 +08:00
|
|
|
.check_apicid_used = NULL,
|
|
|
|
.check_apicid_present = NULL,
|
|
|
|
|
2012-06-07 21:14:49 +08:00
|
|
|
.vector_allocation_domain = default_vector_allocation_domain,
|
2009-01-28 09:37:01 +08:00
|
|
|
.init_apic_ldr = init_x2apic_ldr,
|
|
|
|
|
|
|
|
.ioapic_phys_id_map = NULL,
|
|
|
|
.setup_apic_routing = NULL,
|
|
|
|
.multi_timer_check = NULL,
|
2009-01-28 13:50:47 +08:00
|
|
|
.cpu_present_to_apicid = default_cpu_present_to_apicid,
|
2009-01-28 09:37:01 +08:00
|
|
|
.apicid_to_cpu_present = NULL,
|
|
|
|
.setup_portio_remap = NULL,
|
2009-01-28 19:43:18 +08:00
|
|
|
.check_phys_apicid_present = default_check_phys_apicid_present,
|
2009-01-28 09:37:01 +08:00
|
|
|
.enable_apic_mode = NULL,
|
2009-01-28 20:31:22 +08:00
|
|
|
.phys_pkg_id = x2apic_phys_pkg_id,
|
2009-01-28 09:37:01 +08:00
|
|
|
.mps_oem_check = NULL,
|
|
|
|
|
2011-05-20 07:45:50 +08:00
|
|
|
.get_apic_id = x2apic_get_apic_id,
|
|
|
|
.set_apic_id = x2apic_set_apic_id,
|
2009-01-28 09:37:01 +08:00
|
|
|
.apic_id_mask = 0xFFFFFFFFu,
|
|
|
|
|
2012-06-05 19:23:44 +08:00
|
|
|
.cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and,
|
2009-01-28 09:37:01 +08:00
|
|
|
|
|
|
|
.send_IPI_mask = x2apic_send_IPI_mask,
|
|
|
|
.send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself,
|
|
|
|
.send_IPI_allbutself = x2apic_send_IPI_allbutself,
|
|
|
|
.send_IPI_all = x2apic_send_IPI_all,
|
|
|
|
.send_IPI_self = x2apic_send_IPI_self,
|
|
|
|
|
2009-01-28 23:15:16 +08:00
|
|
|
.trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
|
|
|
|
.trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
|
2009-01-28 09:37:01 +08:00
|
|
|
.wait_for_init_deassert = NULL,
|
|
|
|
.smp_callin_clear_local_apic = NULL,
|
|
|
|
.inquire_remote_apic = NULL,
|
2009-02-17 15:02:14 +08:00
|
|
|
|
|
|
|
.read = native_apic_msr_read,
|
|
|
|
.write = native_apic_msr_write,
|
2012-05-17 00:03:58 +08:00
|
|
|
.eoi_write = native_apic_msr_eoi_write,
|
2009-02-17 15:02:14 +08:00
|
|
|
.icr_read = native_x2apic_icr_read,
|
|
|
|
.icr_write = native_x2apic_icr_write,
|
|
|
|
.wait_icr_idle = native_x2apic_wait_icr_idle,
|
|
|
|
.safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
|
2008-07-11 02:16:59 +08:00
|
|
|
};
|
2011-05-21 08:51:17 +08:00
|
|
|
|
|
|
|
apic_driver(apic_x2apic_phys);
|