2009-07-14 06:02:34 +07:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2009, Microsoft Corporation.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
|
|
* under the terms and conditions of the GNU General Public License,
|
|
|
|
* version 2, as published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
|
|
* more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License along with
|
|
|
|
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
|
|
|
* Place - Suite 330, Boston, MA 02111-1307 USA.
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Haiyang Zhang <haiyangz@microsoft.com>
|
|
|
|
* Hank Janssen <hjanssen@microsoft.com>
|
|
|
|
*
|
|
|
|
*/
|
2011-03-30 03:58:47 +07:00
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
|
2009-08-18 07:22:08 +07:00
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/mm.h>
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 15:04:11 +07:00
|
|
|
#include <linux/slab.h>
|
2009-07-30 04:00:13 +07:00
|
|
|
#include <linux/vmalloc.h>
|
2011-10-05 02:29:52 +07:00
|
|
|
#include <linux/hyperv.h>
|
2012-07-25 06:11:58 +07:00
|
|
|
#include <linux/version.h>
|
2018-03-05 12:17:18 +07:00
|
|
|
#include <linux/random.h>
|
2015-01-10 14:54:32 +07:00
|
|
|
#include <linux/clockchips.h>
|
|
|
|
#include <asm/mshyperv.h>
|
2011-05-13 09:34:28 +07:00
|
|
|
#include "hyperv_vmbus.h"
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2009-07-28 03:47:24 +07:00
|
|
|
/* The one and only */
|
2010-11-09 05:04:40 +07:00
|
|
|
struct hv_context hv_context = {
|
|
|
|
.synic_initialized = false,
|
2009-07-14 06:02:34 +07:00
|
|
|
};
|
|
|
|
|
2018-03-05 12:17:18 +07:00
|
|
|
/*
|
|
|
|
* If false, we're using the old mechanism for stimer0 interrupts
|
|
|
|
* where it sends a VMbus message when it expires. The old
|
|
|
|
* mechanism is used when running on older versions of Hyper-V
|
|
|
|
* that don't support Direct Mode. While Hyper-V provides
|
|
|
|
* four stimer's per CPU, Linux uses only stimer0.
|
|
|
|
*/
|
|
|
|
static bool direct_mode_enabled;
|
|
|
|
static int stimer0_irq;
|
|
|
|
static int stimer0_vector;
|
|
|
|
|
2015-01-10 14:54:32 +07:00
|
|
|
#define HV_TIMER_FREQUENCY (10 * 1000 * 1000) /* 100ns period */
|
|
|
|
#define HV_MAX_MAX_DELTA_TICKS 0xffffffff
|
|
|
|
#define HV_MIN_DELTA_TICKS 1
|
|
|
|
|
2010-03-05 05:11:00 +07:00
|
|
|
/*
|
2010-11-09 05:04:42 +07:00
|
|
|
* hv_init - Main initialization routine.
|
2009-09-01 10:23:33 +07:00
|
|
|
*
|
|
|
|
* This routine must be called before any other routines in here are called
|
|
|
|
*/
|
2010-11-09 05:04:42 +07:00
|
|
|
int hv_init(void)
|
2009-07-14 06:02:34 +07:00
|
|
|
{
|
2017-02-12 13:02:19 +07:00
|
|
|
hv_context.cpu_context = alloc_percpu(struct hv_per_cpu_context);
|
|
|
|
if (!hv_context.cpu_context)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2018-03-05 12:17:18 +07:00
|
|
|
direct_mode_enabled = ms_hyperv.misc_features &
|
2018-06-06 03:37:54 +07:00
|
|
|
HV_STIMER_DIRECT_MODE_AVAILABLE;
|
2011-08-25 23:48:51 +07:00
|
|
|
return 0;
|
2009-07-14 06:02:34 +07:00
|
|
|
}
|
|
|
|
|
2010-03-05 05:11:00 +07:00
|
|
|
/*
|
2010-11-09 05:04:42 +07:00
|
|
|
* hv_post_message - Post a message using the hypervisor message IPC.
|
2009-09-01 10:23:33 +07:00
|
|
|
*
|
|
|
|
* This involves a hypercall.
|
|
|
|
*/
|
2012-03-28 13:58:07 +07:00
|
|
|
int hv_post_message(union hv_connection_id connection_id,
|
2010-11-09 05:04:41 +07:00
|
|
|
enum hv_message_type message_type,
|
|
|
|
void *payload, size_t payload_size)
|
2009-07-14 06:02:34 +07:00
|
|
|
{
|
2010-11-09 05:04:41 +07:00
|
|
|
struct hv_input_post_message *aligned_msg;
|
2017-02-12 13:02:19 +07:00
|
|
|
struct hv_per_cpu_context *hv_cpu;
|
2015-12-15 07:01:40 +07:00
|
|
|
u64 status;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2010-11-09 05:04:41 +07:00
|
|
|
if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT)
|
2011-06-07 05:50:09 +07:00
|
|
|
return -EMSGSIZE;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2017-02-12 13:02:19 +07:00
|
|
|
hv_cpu = get_cpu_ptr(hv_context.cpu_context);
|
|
|
|
aligned_msg = hv_cpu->post_msg_page;
|
2010-11-09 05:04:41 +07:00
|
|
|
aligned_msg->connectionid = connection_id;
|
2014-08-29 08:29:52 +07:00
|
|
|
aligned_msg->reserved = 0;
|
2010-11-09 05:04:41 +07:00
|
|
|
aligned_msg->message_type = message_type;
|
|
|
|
aligned_msg->payload_size = payload_size;
|
|
|
|
memcpy((void *)aligned_msg->payload, payload, payload_size);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2015-12-15 07:01:40 +07:00
|
|
|
status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2017-05-19 00:46:07 +07:00
|
|
|
/* Preemption must remain disabled until after the hypercall
|
|
|
|
* so some other thread can't get scheduled onto this cpu and
|
|
|
|
* corrupt the per-cpu post_msg_page
|
|
|
|
*/
|
|
|
|
put_cpu_ptr(hv_cpu);
|
|
|
|
|
2015-12-15 07:01:40 +07:00
|
|
|
return status & 0xFFFF;
|
2009-07-14 06:02:34 +07:00
|
|
|
}
|
|
|
|
|
2018-03-05 12:17:18 +07:00
|
|
|
/*
|
|
|
|
* ISR for when stimer0 is operating in Direct Mode. Direct Mode
|
|
|
|
* does not use VMbus or any VMbus messages, so process here and not
|
|
|
|
* in the VMbus driver code.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void hv_stimer0_isr(void)
|
|
|
|
{
|
|
|
|
struct hv_per_cpu_context *hv_cpu;
|
|
|
|
|
|
|
|
hv_cpu = this_cpu_ptr(hv_context.cpu_context);
|
|
|
|
hv_cpu->clk_evt->event_handler(hv_cpu->clk_evt);
|
|
|
|
add_interrupt_randomness(stimer0_vector, 0);
|
|
|
|
}
|
|
|
|
|
2015-01-10 14:54:32 +07:00
|
|
|
static int hv_ce_set_next_event(unsigned long delta,
|
|
|
|
struct clock_event_device *evt)
|
|
|
|
{
|
2016-12-22 02:32:01 +07:00
|
|
|
u64 current_tick;
|
2015-01-10 14:54:32 +07:00
|
|
|
|
2015-08-05 14:52:41 +07:00
|
|
|
WARN_ON(!clockevent_state_oneshot(evt));
|
2015-01-10 14:54:32 +07:00
|
|
|
|
2017-05-19 00:46:02 +07:00
|
|
|
current_tick = hyperv_cs->read(NULL);
|
2015-01-10 14:54:32 +07:00
|
|
|
current_tick += delta;
|
2018-06-06 03:37:53 +07:00
|
|
|
hv_init_timer(0, current_tick);
|
2015-01-10 14:54:32 +07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-08-05 14:52:41 +07:00
|
|
|
static int hv_ce_shutdown(struct clock_event_device *evt)
|
|
|
|
{
|
2018-06-06 03:37:53 +07:00
|
|
|
hv_init_timer(0, 0);
|
|
|
|
hv_init_timer_config(0, 0);
|
2018-03-05 12:17:18 +07:00
|
|
|
if (direct_mode_enabled)
|
|
|
|
hv_disable_stimer0_percpu_irq(stimer0_irq);
|
2015-08-05 14:52:41 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int hv_ce_set_oneshot(struct clock_event_device *evt)
|
2015-01-10 14:54:32 +07:00
|
|
|
{
|
|
|
|
union hv_timer_config timer_cfg;
|
|
|
|
|
2018-03-05 12:17:18 +07:00
|
|
|
timer_cfg.as_uint64 = 0;
|
2015-08-05 14:52:41 +07:00
|
|
|
timer_cfg.enable = 1;
|
|
|
|
timer_cfg.auto_enable = 1;
|
2018-03-05 12:17:18 +07:00
|
|
|
if (direct_mode_enabled) {
|
|
|
|
/*
|
|
|
|
* When it expires, the timer will directly interrupt
|
|
|
|
* on the specified hardware vector/IRQ.
|
|
|
|
*/
|
|
|
|
timer_cfg.direct_mode = 1;
|
|
|
|
timer_cfg.apic_vector = stimer0_vector;
|
|
|
|
hv_enable_stimer0_percpu_irq(stimer0_irq);
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* When it expires, the timer will generate a VMbus message,
|
|
|
|
* to be handled by the normal VMbus interrupt handler.
|
|
|
|
*/
|
|
|
|
timer_cfg.direct_mode = 0;
|
|
|
|
timer_cfg.sintx = VMBUS_MESSAGE_SINT;
|
|
|
|
}
|
2018-06-06 03:37:53 +07:00
|
|
|
hv_init_timer_config(0, timer_cfg.as_uint64);
|
2015-08-05 14:52:41 +07:00
|
|
|
return 0;
|
2015-01-10 14:54:32 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void hv_init_clockevent_device(struct clock_event_device *dev, int cpu)
|
|
|
|
{
|
|
|
|
dev->name = "Hyper-V clockevent";
|
|
|
|
dev->features = CLOCK_EVT_FEAT_ONESHOT;
|
|
|
|
dev->cpumask = cpumask_of(cpu);
|
|
|
|
dev->rating = 1000;
|
2015-02-28 02:25:57 +07:00
|
|
|
/*
|
|
|
|
* Avoid settint dev->owner = THIS_MODULE deliberately as doing so will
|
|
|
|
* result in clockevents_config_and_register() taking additional
|
|
|
|
* references to the hv_vmbus module making it impossible to unload.
|
|
|
|
*/
|
2015-01-10 14:54:32 +07:00
|
|
|
|
2015-08-05 14:52:41 +07:00
|
|
|
dev->set_state_shutdown = hv_ce_shutdown;
|
|
|
|
dev->set_state_oneshot = hv_ce_set_oneshot;
|
2015-01-10 14:54:32 +07:00
|
|
|
dev->set_next_event = hv_ce_set_next_event;
|
|
|
|
}
|
|
|
|
|
2013-06-19 10:28:10 +07:00
|
|
|
|
|
|
|
int hv_synic_alloc(void)
|
|
|
|
{
|
|
|
|
int cpu;
|
2018-08-11 06:06:11 +07:00
|
|
|
struct hv_per_cpu_context *hv_cpu;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* First, zero all per-cpu memory areas so hv_synic_free() can
|
|
|
|
* detect what memory has been allocated and cleanup properly
|
|
|
|
* after any failures.
|
|
|
|
*/
|
|
|
|
for_each_present_cpu(cpu) {
|
|
|
|
hv_cpu = per_cpu_ptr(hv_context.cpu_context, cpu);
|
|
|
|
memset(hv_cpu, 0, sizeof(*hv_cpu));
|
|
|
|
}
|
2013-06-19 10:28:10 +07:00
|
|
|
|
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 04:03:40 +07:00
|
|
|
hv_context.hv_numa_map = kcalloc(nr_node_ids, sizeof(struct cpumask),
|
2018-03-05 12:17:12 +07:00
|
|
|
GFP_KERNEL);
|
2015-08-05 14:52:38 +07:00
|
|
|
if (hv_context.hv_numa_map == NULL) {
|
|
|
|
pr_err("Unable to allocate NUMA map\n");
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
2016-12-07 16:16:25 +07:00
|
|
|
for_each_present_cpu(cpu) {
|
2018-08-11 06:06:11 +07:00
|
|
|
hv_cpu = per_cpu_ptr(hv_context.cpu_context, cpu);
|
2017-02-12 13:02:19 +07:00
|
|
|
|
|
|
|
tasklet_init(&hv_cpu->msg_dpc,
|
|
|
|
vmbus_on_msg_dpc, (unsigned long) hv_cpu);
|
|
|
|
|
|
|
|
hv_cpu->clk_evt = kzalloc(sizeof(struct clock_event_device),
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (hv_cpu->clk_evt == NULL) {
|
2015-01-10 14:54:32 +07:00
|
|
|
pr_err("Unable to allocate clock event device\n");
|
|
|
|
goto err;
|
|
|
|
}
|
2017-02-12 13:02:19 +07:00
|
|
|
hv_init_clockevent_device(hv_cpu->clk_evt, cpu);
|
2015-08-05 14:52:38 +07:00
|
|
|
|
2017-02-12 13:02:19 +07:00
|
|
|
hv_cpu->synic_message_page =
|
2013-06-19 10:28:10 +07:00
|
|
|
(void *)get_zeroed_page(GFP_ATOMIC);
|
2017-02-12 13:02:19 +07:00
|
|
|
if (hv_cpu->synic_message_page == NULL) {
|
2013-06-19 10:28:10 +07:00
|
|
|
pr_err("Unable to allocate SYNIC message page\n");
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
2017-02-12 13:02:19 +07:00
|
|
|
hv_cpu->synic_event_page = (void *)get_zeroed_page(GFP_ATOMIC);
|
|
|
|
if (hv_cpu->synic_event_page == NULL) {
|
2013-06-19 10:28:10 +07:00
|
|
|
pr_err("Unable to allocate SYNIC event page\n");
|
|
|
|
goto err;
|
|
|
|
}
|
2014-08-29 08:29:52 +07:00
|
|
|
|
2017-02-12 13:02:19 +07:00
|
|
|
hv_cpu->post_msg_page = (void *)get_zeroed_page(GFP_ATOMIC);
|
|
|
|
if (hv_cpu->post_msg_page == NULL) {
|
2014-08-29 08:29:52 +07:00
|
|
|
pr_err("Unable to allocate post msg page\n");
|
|
|
|
goto err;
|
|
|
|
}
|
2016-12-07 16:16:26 +07:00
|
|
|
|
2017-02-12 13:02:19 +07:00
|
|
|
INIT_LIST_HEAD(&hv_cpu->chan_list);
|
2013-06-19 10:28:10 +07:00
|
|
|
}
|
|
|
|
|
2018-03-05 12:17:18 +07:00
|
|
|
if (direct_mode_enabled &&
|
|
|
|
hv_setup_stimer0_irq(&stimer0_irq, &stimer0_vector,
|
|
|
|
hv_stimer0_isr))
|
|
|
|
goto err;
|
|
|
|
|
2013-06-19 10:28:10 +07:00
|
|
|
return 0;
|
|
|
|
err:
|
2018-08-02 10:08:25 +07:00
|
|
|
/*
|
|
|
|
* Any memory allocations that succeeded will be freed when
|
|
|
|
* the caller cleans up by calling hv_synic_free()
|
|
|
|
*/
|
2013-06-19 10:28:10 +07:00
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void hv_synic_free(void)
|
|
|
|
{
|
|
|
|
int cpu;
|
|
|
|
|
2017-02-12 13:02:19 +07:00
|
|
|
for_each_present_cpu(cpu) {
|
|
|
|
struct hv_per_cpu_context *hv_cpu
|
|
|
|
= per_cpu_ptr(hv_context.cpu_context, cpu);
|
|
|
|
|
2018-08-02 10:08:25 +07:00
|
|
|
kfree(hv_cpu->clk_evt);
|
|
|
|
free_page((unsigned long)hv_cpu->synic_event_page);
|
|
|
|
free_page((unsigned long)hv_cpu->synic_message_page);
|
|
|
|
free_page((unsigned long)hv_cpu->post_msg_page);
|
2017-02-12 13:02:19 +07:00
|
|
|
}
|
|
|
|
|
2015-08-05 14:52:38 +07:00
|
|
|
kfree(hv_context.hv_numa_map);
|
2013-06-19 10:28:10 +07:00
|
|
|
}
|
|
|
|
|
2010-03-05 05:11:00 +07:00
|
|
|
/*
|
2018-03-05 12:17:13 +07:00
|
|
|
* hv_synic_init - Initialize the Synthetic Interrupt Controller.
|
2009-09-01 10:23:33 +07:00
|
|
|
*
|
|
|
|
* If it is already initialized by another entity (ie x2v shim), we need to
|
|
|
|
* retrieve the initialized message and event pages. Otherwise, we create and
|
|
|
|
* initialize the message and event pages.
|
|
|
|
*/
|
2016-12-08 05:53:11 +07:00
|
|
|
int hv_synic_init(unsigned int cpu)
|
2009-07-14 06:02:34 +07:00
|
|
|
{
|
2017-02-12 13:02:19 +07:00
|
|
|
struct hv_per_cpu_context *hv_cpu
|
|
|
|
= per_cpu_ptr(hv_context.cpu_context, cpu);
|
2009-08-21 02:11:26 +07:00
|
|
|
union hv_synic_simp simp;
|
|
|
|
union hv_synic_siefp siefp;
|
2010-11-09 05:04:41 +07:00
|
|
|
union hv_synic_sint shared_sint;
|
2009-08-21 02:11:26 +07:00
|
|
|
union hv_synic_scontrol sctrl;
|
2010-01-23 02:17:50 +07:00
|
|
|
|
|
|
|
/* Setup the Synic's message page */
|
2017-01-20 01:51:54 +07:00
|
|
|
hv_get_simp(simp.as_uint64);
|
2010-11-09 05:04:39 +07:00
|
|
|
simp.simp_enabled = 1;
|
2017-02-12 13:02:19 +07:00
|
|
|
simp.base_simp_gpa = virt_to_phys(hv_cpu->synic_message_page)
|
2010-01-23 02:17:50 +07:00
|
|
|
>> PAGE_SHIFT;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2017-01-20 01:51:54 +07:00
|
|
|
hv_set_simp(simp.as_uint64);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2010-01-23 02:17:50 +07:00
|
|
|
/* Setup the Synic's event page */
|
2017-01-20 01:51:55 +07:00
|
|
|
hv_get_siefp(siefp.as_uint64);
|
2010-11-09 05:04:39 +07:00
|
|
|
siefp.siefp_enabled = 1;
|
2017-02-12 13:02:19 +07:00
|
|
|
siefp.base_siefp_gpa = virt_to_phys(hv_cpu->synic_event_page)
|
2010-01-23 02:17:50 +07:00
|
|
|
>> PAGE_SHIFT;
|
|
|
|
|
2017-01-20 01:51:55 +07:00
|
|
|
hv_set_siefp(siefp.as_uint64);
|
2009-09-01 10:23:33 +07:00
|
|
|
|
|
|
|
/* Setup the shared SINT. */
|
2018-06-06 03:37:53 +07:00
|
|
|
hv_get_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2013-02-18 02:30:44 +07:00
|
|
|
shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;
|
2010-11-09 05:04:41 +07:00
|
|
|
shared_sint.masked = false;
|
2018-06-06 03:37:54 +07:00
|
|
|
if (ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED)
|
2017-03-15 08:01:39 +07:00
|
|
|
shared_sint.auto_eoi = false;
|
|
|
|
else
|
|
|
|
shared_sint.auto_eoi = true;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2018-06-06 03:37:53 +07:00
|
|
|
hv_set_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2009-07-28 03:47:24 +07:00
|
|
|
/* Enable the global synic bit */
|
2017-01-20 01:51:56 +07:00
|
|
|
hv_get_synic_state(sctrl.as_uint64);
|
2010-11-09 05:04:39 +07:00
|
|
|
sctrl.enable = 1;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2017-01-20 01:51:56 +07:00
|
|
|
hv_set_synic_state(sctrl.as_uint64);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2010-11-09 05:04:40 +07:00
|
|
|
hv_context.synic_initialized = true;
|
2012-12-01 21:46:47 +07:00
|
|
|
|
2015-01-10 14:54:32 +07:00
|
|
|
/*
|
|
|
|
* Register the per-cpu clockevent source.
|
|
|
|
*/
|
2018-06-06 03:37:54 +07:00
|
|
|
if (ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE)
|
2017-02-12 13:02:19 +07:00
|
|
|
clockevents_config_and_register(hv_cpu->clk_evt,
|
2015-01-10 14:54:32 +07:00
|
|
|
HV_TIMER_FREQUENCY,
|
|
|
|
HV_MIN_DELTA_TICKS,
|
|
|
|
HV_MAX_MAX_DELTA_TICKS);
|
2016-12-08 05:53:11 +07:00
|
|
|
return 0;
|
2009-07-14 06:02:34 +07:00
|
|
|
}
|
|
|
|
|
2015-02-28 02:25:57 +07:00
|
|
|
/*
|
|
|
|
* hv_synic_clockevents_cleanup - Cleanup clockevent devices
|
|
|
|
*/
|
|
|
|
void hv_synic_clockevents_cleanup(void)
|
|
|
|
{
|
|
|
|
int cpu;
|
|
|
|
|
2018-06-06 03:37:54 +07:00
|
|
|
if (!(ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE))
|
2015-02-28 02:25:57 +07:00
|
|
|
return;
|
|
|
|
|
2018-03-05 12:17:18 +07:00
|
|
|
if (direct_mode_enabled)
|
|
|
|
hv_remove_stimer0_irq(stimer0_irq);
|
|
|
|
|
2017-02-12 13:02:19 +07:00
|
|
|
for_each_present_cpu(cpu) {
|
|
|
|
struct hv_per_cpu_context *hv_cpu
|
|
|
|
= per_cpu_ptr(hv_context.cpu_context, cpu);
|
|
|
|
|
|
|
|
clockevents_unbind_device(hv_cpu->clk_evt, cpu);
|
|
|
|
}
|
2015-02-28 02:25:57 +07:00
|
|
|
}
|
|
|
|
|
2010-03-05 05:11:00 +07:00
|
|
|
/*
|
2010-11-09 05:04:42 +07:00
|
|
|
* hv_synic_cleanup - Cleanup routine for hv_synic_init().
|
2009-09-01 10:23:33 +07:00
|
|
|
*/
|
2016-12-08 05:53:11 +07:00
|
|
|
int hv_synic_cleanup(unsigned int cpu)
|
2009-07-14 06:02:34 +07:00
|
|
|
{
|
2010-11-09 05:04:41 +07:00
|
|
|
union hv_synic_sint shared_sint;
|
2009-08-21 02:11:26 +07:00
|
|
|
union hv_synic_simp simp;
|
|
|
|
union hv_synic_siefp siefp;
|
2015-02-28 02:25:55 +07:00
|
|
|
union hv_synic_scontrol sctrl;
|
2016-12-08 05:53:12 +07:00
|
|
|
struct vmbus_channel *channel, *sc;
|
|
|
|
bool channel_found = false;
|
|
|
|
unsigned long flags;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2010-11-09 05:04:40 +07:00
|
|
|
if (!hv_context.synic_initialized)
|
2016-12-08 05:53:11 +07:00
|
|
|
return -EFAULT;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2016-12-08 05:53:12 +07:00
|
|
|
/*
|
|
|
|
* Search for channels which are bound to the CPU we're about to
|
|
|
|
* cleanup. In case we find one and vmbus is still connected we need to
|
|
|
|
* fail, this will effectively prevent CPU offlining. There is no way
|
|
|
|
* we can re-bind channels to different CPUs for now.
|
|
|
|
*/
|
|
|
|
mutex_lock(&vmbus_connection.channel_mutex);
|
|
|
|
list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) {
|
|
|
|
if (channel->target_cpu == cpu) {
|
|
|
|
channel_found = true;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
spin_lock_irqsave(&channel->lock, flags);
|
|
|
|
list_for_each_entry(sc, &channel->sc_list, sc_list) {
|
|
|
|
if (sc->target_cpu == cpu) {
|
|
|
|
channel_found = true;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&channel->lock, flags);
|
|
|
|
if (channel_found)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
mutex_unlock(&vmbus_connection.channel_mutex);
|
|
|
|
|
|
|
|
if (channel_found && vmbus_connection.conn_state == CONNECTED)
|
|
|
|
return -EBUSY;
|
|
|
|
|
2015-02-28 02:25:57 +07:00
|
|
|
/* Turn off clockevent device */
|
2018-06-06 03:37:54 +07:00
|
|
|
if (ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE) {
|
2017-02-12 13:02:19 +07:00
|
|
|
struct hv_per_cpu_context *hv_cpu
|
|
|
|
= this_cpu_ptr(hv_context.cpu_context);
|
|
|
|
|
|
|
|
clockevents_unbind_device(hv_cpu->clk_evt, cpu);
|
|
|
|
hv_ce_shutdown(hv_cpu->clk_evt);
|
|
|
|
put_cpu_ptr(hv_cpu);
|
2016-12-04 03:34:35 +07:00
|
|
|
}
|
2015-02-28 02:25:57 +07:00
|
|
|
|
2018-06-06 03:37:53 +07:00
|
|
|
hv_get_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2010-11-09 05:04:41 +07:00
|
|
|
shared_sint.masked = 1;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2010-01-09 00:06:40 +07:00
|
|
|
/* Need to correctly cleanup in the case of SMP!!! */
|
2009-07-28 03:47:24 +07:00
|
|
|
/* Disable the interrupt */
|
2018-06-06 03:37:53 +07:00
|
|
|
hv_set_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2017-01-20 01:51:54 +07:00
|
|
|
hv_get_simp(simp.as_uint64);
|
2010-11-09 05:04:39 +07:00
|
|
|
simp.simp_enabled = 0;
|
|
|
|
simp.base_simp_gpa = 0;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2017-01-20 01:51:54 +07:00
|
|
|
hv_set_simp(simp.as_uint64);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2017-01-20 01:51:55 +07:00
|
|
|
hv_get_siefp(siefp.as_uint64);
|
2010-11-09 05:04:39 +07:00
|
|
|
siefp.siefp_enabled = 0;
|
|
|
|
siefp.base_siefp_gpa = 0;
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2017-01-20 01:51:55 +07:00
|
|
|
hv_set_siefp(siefp.as_uint64);
|
2009-07-14 06:02:34 +07:00
|
|
|
|
2015-02-28 02:25:55 +07:00
|
|
|
/* Disable the global synic bit */
|
2017-01-20 01:51:56 +07:00
|
|
|
hv_get_synic_state(sctrl.as_uint64);
|
2015-02-28 02:25:55 +07:00
|
|
|
sctrl.enable = 0;
|
2017-01-20 01:51:56 +07:00
|
|
|
hv_set_synic_state(sctrl.as_uint64);
|
2016-12-08 05:53:11 +07:00
|
|
|
|
|
|
|
return 0;
|
2009-07-14 06:02:34 +07:00
|
|
|
}
|