Commit Graph

397 Commits

Author SHA1 Message Date
Mingqiang Chi
e4e38e1bfb hv:Check if VMX capability is locked with incorrect value
Check if the VMX capability is locked with incorrect value,
at the time when HV do the hardware capability detect.

Tracked-On: #861
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-09-07 10:23:04 +08:00
Mingqiang Chi
65930809ee hv: Replace dynamic allocation with static memory for vmxon_region
Remove vmxon_region_pa from structure per_cpu_region,
and define vmxon_region inside per_cpu_region.

Tracked-On: #861
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-09-07 10:23:04 +08:00
Shiqing Gao
4360235edf hv: treewide: fix 'Macro parameter not in brackets'
Add the brackets for Macro parameter to avoid the unintentional
mistakes.

A simple example that may cause mistakes:
        #define minus(x) -x
When the following call is made,
        z = minus(a-b)
it becomes:
        z = -a-b;
where "-a - b" is equivalent to "(-a) - b" rather than "- (a - b)", as
expected.

v2 -> v3:
 * convert DMAR_WAIT_COMPLETION to inline function
 * remove the macro PIC_PIN_FOREACH and implement the well-formed
   for loop in each case
 * replace __CPP_STRING with STRINGIFY and remove the unused CPP_STRING

v1 -> v2:
 * Remove some changes to function like macro since MISRA-C requires to
   use inline functions if it is possible.
   These MACRO brackets violations will be fixed together when fixing
   other issues related to function like macro.

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
2018-09-07 10:22:00 +08:00
Shiqing Gao
f2f719cfa8 hv: fix 'Procedure is not called or referenced in code analysed'
MISRA-C requires that each function defined and declared shall be called
or referenced in code analyzed.

In some cases, we would like to keep the non-called functions for code
completeness, such as
vcpu_inject_extint/vcpu_inject_nmi/vcpu_inject_gp/vcpu_inject_pf
/vcpu_inject_ud/vcpu_inject_ac/vcpu_inject_ss.

This pacth removes some functions that are independent and are not
called in our code base.

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-09-06 12:01:30 +08:00
Shiqing Gao
67038794af hv: treewide: convert some MACROs to inline functions
MISRA-C requires that each parameter in the MACRO shall be in brackets.

In some cases, adding brackets for all of the parameters may not be a
perfect solution.
For example, it may affect the code readability when there are many
parameters used in the MACRO.
And duplicated brackets will appear when one MACRO called another MACRO
which is using same parameters.

This patch convert some MACROs to inline functions to avoid such cases.

v1 -> v2:
 * Remove the unnecessary changes in hypervisor/bsp/uefi/efi/boot.h

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
2018-09-04 12:27:18 +08:00
Shiqing Gao
54439ecae1 hv: treewide: fix 'Expression is not Boolean'
MISRA-C requires that the controlling expression of an if statement or
an iteration-statement shall be Boolean type.

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
2018-09-03 11:23:53 +08:00
Li, Fei1
d67eefb012 hv: mmu: use get/set_pgentry to get/set page table entry
And remove mem_read/write_xx API.

Tracked-On: #1124

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-09-03 09:32:49 +08:00
Li, Fei1
7f9befb643 hv: ept: remove find_next_table
We don't need find_next_table to walk to the next EPT page table.

Tracked-On: #1124

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-09-03 09:32:49 +08:00
Li, Fei1
9257ecf4bb hv: mmu: cleanup mmu.h
Remove unused Macro defininion.

Tracked-On: #1124

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-09-03 09:32:49 +08:00
Li, Fei1
06ab2b829f hv: mmu: add 1GB page capability check when CPU boot
Add 1GB large page support limit on our platform.

Tracked-On: #1124

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-09-03 09:32:49 +08:00
Li, Fei1
58fffcd3b9 hv: mmu: rename PTT_HOST to PTT_PRIMARY
Tracked-On: #1124

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-09-03 09:32:49 +08:00
Sainath Grandhi
43741ba5e3 hv: Leave interrupts disabled during vmexit - ACRN partition mode
Since vmexit handling in ACRN partition mode is not complex (since no SOS and
all devices passthru), interrupts can stay disabled in root mode during
vmexit handling.

Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
2018-08-31 08:48:47 +08:00
Shiqing Gao
2a184f353c hv: code clean up regarding to guest_msrs
Change guest_msrs in vcpu data structure from pointer to array, which
could avoid the dynamic memory allocation.

v1 -> v2:
 * Remove the unnecessary initialization for guest_msrs[] since vcpu is
   allocated by calloc.

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-28 11:08:48 +08:00
Mingqiang Chi
4e8798e018 hv:Replace vioapic pointer with instance in structure vm
-- rename struct vioapic --> struct acrn_vioapic
-- update 'vioapic' field in 'struct arch_vm' from pointer
   to instance
-- change vm_ioapic(vm) to inline, and move it to vm.h
-- change vioapic_init to void type

Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Anthony Xu <anthony.xu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-27 09:49:12 +08:00
Mingqiang Chi
29dbd1084d hv:Replace vuart pointer with instance in structure vm
-- update 'vuart' field in 'struct vm' from pointer
   to instance
-- replace MACRO with inline function for vm_vuart,
   and move it to vm.h
-- change vuart_init to void type
-- rename struct vuart -->struct acrn_vuart

Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Anthony Xu <anthony.xu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-27 09:49:12 +08:00
Mingqiang Chi
0b54946bac hv:Replace vpic pointer with instance in structure vm
-- update 'vpic' field in 'struct vm' from pointer
  to instance, and move it from 'struct vm' to 'struct arch_vm'
-- replace MACRO with inline function for vm_pic, and move it
   to vm.h
-- changed vpic_init to void type
-- removed vpic_cleanup
-- move struct acrn_vpic/i8259_reg_state from vpic.c to vpic.h

Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Anthony Xu <anthony.xu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-27 09:49:12 +08:00
Yang, Yu-chu
de53964c05 HV: Removed the unused parameters and union from gdt
In the gdt.h, it defines unions and parameters which is not used
in hypervisor. Removed them to keep the gdt definition simple.

Signed-off-by: Yang, Yu-chu <yu-chu.yang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-27 09:40:25 +08:00
Yonghua Huang
7bc1a3f925 HV: Refine APICv capabilities detection
- by default, ACRN will not support platform without
   below APICv features:
    -- Use TPR shadow
    -- APIC-register virtualization

 - remove mmio emualtion of local APIC for guest

Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-24 09:58:58 +08:00
Binbin Wu
f95d07dc43 hv: vtd: use EPT as translation table for PTDev in SOS
In current code, the address translation type for passthrough devices
in SOS is passthrough type, which means the device in SOS can access
the whole physcial memory.
This patch uses SOS EPT to translate address for passthrough
devices. So that the memory of VMM or trusty can be protected from
SOS PTDev.

Signed-off-by: Binbin Wu <binbin.wu@intel.com>
Reviewed-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-23 11:46:57 +08:00
Li, Fei1
93c1b07c1d hv: mmu: remove old map_mem
Now there is no one use it.

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
2018-08-23 11:10:26 +08:00
Li, Fei1
4bb8456de8 hv: ept: refine ept_mr_add base on mmu_add
Refine ept_mr_add base on mmu_add. The old map_mem could be removed
once this was done.

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
2018-08-23 11:10:26 +08:00
Li, Fei1
2371839cad hv: ptdev: remove vector index from structure ptdev_msi_info
Since it's stored in source id already.

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-23 11:10:04 +08:00
Li, Fei1
e8c0763de6 hv: ptdev: add source_id for ptdev to identify source
Then use the source id to lookup the ptdev remapping entry.
For msi interrupt ptdev: use bdf and vector_index to identify the id;
For intx interrupt ptdev: use pin and pin source to identify the id.

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-23 11:10:04 +08:00
Zhi Jin
6367650a70 hv: debug: add the hypervisor NPK log
The npk_log is a log destination for the hypervisor, similar to the
console_log and the mem_log. It can be enabled/disabled/configured
by the SOS kernel via the hypercall HC_SETUP_HV_NPK_LOG.
The configuration includes:
1. Set the MMIO base address of the reserved NPK master.
2. Set the log level of the hypervisor NPK log.
After that, the npk_log can be enabled to write the hypervisor logs to
the MMIO address of the reserved NPK master with a simple header.

Signed-off-by: Zhi Jin <zhi.jin@intel.com>
Signed-off-by: Liu, Xiaojing <xiaojing.liu@intel.com>
Reviewed-by: CHEN Gang <gang.c.chen@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-23 11:09:25 +08:00
Zhi Jin
3c6df9b70c hv: add mmio functions for 64bit values
Signed-off-by: Zhi Jin <zhi.jin@intel.com>
Reviewed-by: CHEN Gang <gang.c.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-23 11:09:25 +08:00
Yu Wang
a6c2065b2e hv: apicv: change the name of vapic to apicv
Remove the vapic name and unify to apicv.

Signed-off-by: Yu Wang <yu1.wang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-23 08:55:30 +08:00
Yu Wang
a0c625b85a hv: apicv: change the apicv related API with vlapic_apicv prefix
The apicv is one hardware acceleration feature of vlapic. All vlapic
APIs should keep vlapic_ as the prefix.

Signed-off-by: Yu Wang <yu1.wang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-23 08:55:30 +08:00
Mingqiang Chi
c43d0e4f01 hv:Changed several APIs to void type
Since these APIs always return 0,
change them to void type,
vcpu_set_cr0()
vmx_write_cr0()
vcpu_set_cr4()
vmx_write_cr4()
kick_notification()
tsc_deadline_handler()
dmar_fault_handler()
ptdev_interrupt_handler()

Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
2018-08-23 08:54:54 +08:00
Shiqing Gao
42aaf5d46f hv: code clean up regarding to % and / operations
- Clean up some code regarding to % and / operations since bit
  operations are faster.
        x % 64U ---> x & 0x3fU
        x % 32U ---> x & 0x1fU
        x % 16U ---> x & 0xfU
        x % 8U  ---> x & 0x7U
        x % 4U  ---> x & 0x3U
        x % 2U  ---> x & 0x1U

        x / 64U ---> x >> 6U
        x / 32U ---> x >> 5U
        x / 16U ---> x >> 4U
        x / 8U  ---> x >> 3U
        x / 4U  ---> x >> 2U
        x / 2U  ---> x >> 1U
- Minor changes regarding to coding styles

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-22 15:37:53 +08:00
Shiqing Gao
3e598ebb28 hv: fix 'No definition in system for prototyped procedure'
Remove the functions without definition.

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
2018-08-22 13:11:25 +08:00
Yan, Like
65e01a0cd2 hv: pirq: use a bitmap to maintain irq use status
This commit replaces the "used" field of irq_desc with a bitmap to maintain
the irq use status to save memory and LOC, and improve the efficiency as well.

Signed-off-by: Yan, Like <like.yan@intel.com>
Reviewed-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-22 12:52:43 +08:00
Yonghua Huang
e0d40feaa8 HV:refine 'apic_page' & 'pir_desc' in 'struct acrn_vlapic'
- update 'apic_page' field in 'struct acrn_vlapic',
   from pointer type to 'struct lapic_regs' type.

 - delete 'pir' and update 'pir_desc' to 'vlapic_pir_desc'
   type.

 - fix potential memory leak in 'vlapic_create()'
   should free allocated memory in case of registering
   mmio handler failure.

Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
2018-08-22 12:52:07 +08:00
Shiqing Gao
8924f6dabb hv: vmx: fix 'Array has no bounds specified'
MISRAC requires that the array size should be declared explicitly.

This patch fixes the issues caused by vm0_boot_context.

Fix pattern is like below:
   extern char start_of_ROM, end_of_ROM, start_of_FLASH;
   memcpy (& start_of_FLASH, & start_of_ROM, & end_of_ROM - &
start_of_ROM);

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
2018-08-21 13:03:28 +08:00
Shiqing Gao
1017d91aa6 hv: treewide: fix 'Empty parameter list to procedure/function'
Use func(void) rather than func() for the function declaration and
definition based on MISRAC requirement.

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
2018-08-21 09:55:46 +08:00
Shiqing Gao
7a4dcfcc1a hv: treewide: fix 'Function prototype/defn param type mismatch'
Fix the parameter type mismatch between API declaration and definition.

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-21 09:55:12 +08:00
Mingqiang Chi
752e311e11 hv:fixed MISRA-C return value violations
-- change send_start_ipi/do_copy_earlylog to void type
-- drop the return value for vcpu_queue_execption
   when inject GP/PF/UD/AC/SS

Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
2018-08-21 09:54:45 +08:00
Shiqing Gao
431ef57076 hv: vioapic: fix 'No definition in system for prototyped procedure'
Remove two APIs without definition

Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
2018-08-21 09:53:55 +08:00
Mingqiang Chi
40fd8893b4 hv:fixed several return value violations
-- change two timer callbacks to void type
-- ignore the return value for add_timer
-- add (void) before several functions(memset/memcpy/
   vcpu_get_xxx)

v1-->v2:
   ignore the return value for add_timer
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
2018-08-20 09:51:07 +08:00
Minggui Cao
b37008d74e HV: check secure/normal world for EPTP in gpa2hpa
for secure and normal world has different EPTP, in secure world,
it could trap to hypervisor and call gpa2hpa function. So it need
check if it is in normal or secure world for EPTP selection.

Detailed explanation from Yadong Qi <yadong.qi@intel.com>:
Currently, trusty OS does not handle interrupt, so when an interrupt
is delivering in trusty, trusty will set it to LAPIC IRR register by
inject self_ipi() and then call world_switch to switch to Android,
So android will receive/handle the interrupt properly.Since the
vLAPIC is enabled in ACRN, so when trusty try to inject self_ipi(),
APIC-ACCESS vmexit will happen. Then ACRN will do instruction
decode/emulation, so the GPA2HPA will fail since page walk is using
nworld_eptp. It is probability an issue.

Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-17 14:31:43 +08:00
Yan, Like
538173838d hv: pirq: change the order of functions within irq.c
This commit changes the order of functions in arch/x86/irq.c, and internal
function names to make it looks cleaner, with no change within any function.

Signed-off-by: Yan, Like <like.yan@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-17 14:25:52 +08:00
Yan, Like
2c044e0c4e hv: pirq: refactor vector allocation/free
This commit refactors vector allocation/free codes, two functions are
defined to help alloc/free vectors for an irq:
- uint32_t alloc_irq_vector(uint32_t irq)
  - alloc a free vector (0x20 ~ 0xDF), and bind it to irq, for legacy irqs
    and static mapped irqs, vector has been allocated and bind, so just
    check the mapping correctness;
  - return: valid vector on success, VECTOR_INVALID on failure.

- void free_irq_vector(uint32_t irq)
  - free vector allocated via alloc_irq_vector(), for legacy irqs and static
    mapped irqs, nothing need to do.

Signed-off-by: Yan, Like <like.yan@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-17 14:25:52 +08:00
Yan, Like
1bf2fc342a hv: pirq: refactor irq num alloc/free
This commit refactors the alloc/free irq num, two functions are defined:
- uint32_t alloc_irq_num(uint32_t irq)
  - if irq is valid, mark the irq_desc as used; if it's IRQ_INVALID,
    alloc a free irq, or else do nothing;
  - return: irq num on success, or IRQ_INVALID on failure.

- void free_irq_num(uint32_t irq)
  - free the irq num allocated via alloc_irq_num();

And a global spinlock to protect it from concurrent allocation/free.

Signed-off-by: Yan, Like <like.yan@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-17 14:25:52 +08:00
Sainath Grandhi
38a1898542 hv: Fix comments referring to wrong hypervisor name
Fix comments referring to wrong hypervisor name

Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
2018-08-17 10:03:32 +08:00
Arindam Roy
d3db5a6705 HV: Add const qualifiers where required
V1:
In order to better comply with MISRA C,
add const qualifiers whereeven required.
In the patch, these are being added to pointers
which are normally used in "get" functions.

V2: Corrected the issues in the patch
pointed by Junjie in his review comments.
Moved the const qualifiers to the correct
places. Removed some changes which are not
needed.

V3: Updated patch comment.
This modifies a subset of all the functions
which might need constant qualifiers
for the their parameters.
This is not and exhaustive patch. This only
targets obvious places where we can use
the const qualifier. More changes will be
submitted in future patches, if required.

Signed-off-by: Arindam Roy <arindam.roy@intel.com>
2018-08-17 10:02:12 +08:00
Sainath Grandhi
022ef92b62 hv: Add vrtc emulation support for ACRN partition mode
This patch adds code to support read-only RTC support for guests
run by partition mode ACRN. It supports RW for CMOS address port 0x70
and RO for CMOS data port 0x71. Reads to CMOS RAM offsets are fetched
by reading CMOS h/w directly and writes to CMOS offsets are discarded.

Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
2018-08-16 16:23:11 +08:00
Yonghua Huang
d030595194 HV: remove 'spinlock_rfags' declaration
- remove the global declaration of 'cpu_int_value'

Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-16 09:43:04 +08:00
Mingqiang Chi
de487fff2b hv:fix return value violations for vpic/vioapic
-- Change these APIs to void type, add pre-conditions,
   and move parameter-check to upper-layer functions.
   handle_vpic_irqline
   vpic_set_irqstate
   vpic_assert_irq
   vpic_deassert_irq
   vpic_pulse_irq
   vpic_get_irq_trigger
   handle_vioapic_irqline
   vioapic_assert_irq
   vioapic_deassert_irq
   vioapic_pulse_irq
-- Remove dead code
   vpic_set_irq_trigger

v1-->v2:
   add cleanup vpic
   change some APIs to void type, add pre-conditions,
   and move the parameter-check to upper-layer functions.

Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
2018-08-16 09:01:08 +08:00
Jason Chen CJ
f8f49d410f dump vcpu registers on correct vcpu
after updated cpu context get/set method, the vcpu_dumreg cmd is not
correct anymore as the registers may read from VMCS but meantime hv
shell may not be running on target vcpu.

this patch take use of smp_call_function for vcpu dumpreg and make the
dump always come from correct vcpu.

v2:
- use str pointer to get vcpu_dumpreg context instead of print out directly
  in notify handler.

Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2018-08-15 12:05:18 +08:00
Jason Chen CJ
4b03c97a5e add smp_call_function support
take use of VCPU_NOTIFY vector, add smp_call_function support.
added a per_cpu field smp_call_info, and make each smp_call_function
is not re-entered, and the caller CPU is returned when all the target
CPUs complete the call.

v4:
- remove global lock
- take use of wait_sync_change function to do the sequence sync

v3:
- remove per_cpu lock in smp_call_info
- use a global lock to ensure smp_call_function sequence
- use pcpu_sync_sleep to wait IPI complete

v2:
- after new smp function come, if old one exist, changed from overwirte
  with the new one to ignore the new one.

Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
2018-08-15 12:05:18 +08:00
Jason Chen CJ
e19d36fa6c change pcpu_sync_sleep to wait_sync_change
pcpu_sync_sleep monitor "uint64_t sync" change to "1UL << mask_bit",
which is not very clear to take use of it.
change it to wait_sync_change, means monitor "uint64_t sync" change to
"wake_sync", make the function clear to use.
And expose it for the usage of the following patches.

Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
2018-08-15 12:05:18 +08:00