As ACRN prepares to support platforms with multiple IO-APICs,
GSI is a better way to represent physical and virtual INTx interrupt
source.
1) This patch replaces usage of "pin" with "gsi" whereever applicable
across the modules.
2) PIC pin to gsi is trickier and needs to consider the usage of
"Interrupt Source Override" structure in ACPI for the corresponding VM.
Tracked-On: #4151
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Acked-by: Eddie Dong <eddie.dong@Intel.com>
1. Renames DEFINE_IOAPIC_SID with DEFINE_INTX_SID as the virtual source can
be IOAPIC or PIC
2. Rename the src member of source_id.intx_id to ctlr to indicate interrupt
controller
2. Changes the type of src member of source_id.intx_id from uint32_t to
enum with INTX_CTLR_IOAPIC and INTX_CTLR_PIC
Tracked-On: #4447
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
One argument is missing for the function ptirq_alloc_entry.
This patch fixes the doc generation error.
Tracked-On: #3882
Signed-off-by: Binbin Wu <binbin.wu@intel.com>
Fixed misspellings and rst formatting issues.
Added ptdev.h to the list of include file for doxygen
Tracked-On: #3882
Signed-off-by: Binbin Wu <binbin.wu@intel.com>
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Add doxygen style comments to ptdev public APIs.
Add these API descriptions to group acrn_passthrough.
Tracked-On: #3882
Signed-off-by: Binbin Wu <binbin.wu@intel.com>
BVT (Borrowed virtual time) scheduler is used to schedule vCPUs on pCPU.
It has the concept of virtual time, vCPU with earliset virtual time is
dispatched first.
Main concepts:
tick timer:
a period tick is used to measure the physcial time in units of MCU
(minimum charing unit).
runqueue:
thread in the runqueue is ordered by virtual time.
weight:
each thread receives a share of the pCPU in proportion to its
weight.
context switch allowance:
the physcial time by which the current thread is allowed to advance
beyond the next runnable thread.
warp:
a thread with warp enabled will have a change to minus a value (Wi)
from virtual time to achieve higher priority.
virtual time:
AVT: actual virtual time, advance in proportional to weight.
EVT: effective virtual time.
EVT <- AVT - ( warp ? Wi : 0 )
SVT: scheduler virtual time, the minimum AVT in the runqueue.
Tracked-On: #4410
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Now we split passthrough PCI device from DM to HV, we could remove all the passthrough
PCI device unused code.
Tracked-On: #4371
Signed-off-by: Li Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Add assign/deassign PCI device hypercall APIs to assign a PCI device from SOS to
post-launched VM or deassign a PCI device from post-launched VM to SOS. This patch
is prepared for spliting passthrough PCI device from DM to HV.
The old assign/deassign ptdev APIs will be discarded.
Tracked-On: #4371
Signed-off-by: Li Fei1 <fei1.li@intel.com>
'param' is BDF value instead of GPA when VHM driver
issues below 2 hypercalls:
- HC_ASSIGN_PTEDEV
- HC_DEASSIGN_PTDEV
This patch is to remove related code in hc_assign/deassign()
functions.
Tracked-On: #4334
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
This simple event implemention can only support exclusive waiting
at same time. It mainly used by thread who want to wait for special event
happens.
Thread A who want to wait for some events calls
wait_event(struct sched_event *);
Thread B who can give the event signal calls
signal_event(struct sched_event *);
Tracked-On: #4329
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
We don't use INIT signal notification method now. This patch
removes them.
Tracked-On: #3886
Acked-by: Eddie Dong <eddie.dong@intel.com>
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
We have implemented a new notification method using NMI.
So replace the INIT notification method with the NMI one.
Then we can remove INIT notification related code later.
Tracked-On: #3886
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
ACRN hypervisor needs to kick vCPU off VMX non-root mode to do some
operations in hypervisor, such as interrupt/exception injection, EPT
flush etc. For non lapic-pt vCPUs, we can use IPI to do so. But, it
doesn't work for lapic-pt vCPUs as the IPI will be injected to VMs
directly without vmexit.
Without the way to kick the vCPU off VMX non-root mode to handle pending
request on time, there may be fatal errors triggered.
1). Certain operation may not be carried out on time which may further
lead to fatal errors. Taking the EPT flush request as an example, once we
don't flush the EPT on time and the guest access the out-of-date EPT,
fatal error happens.
2). ACRN now will send an IPI with vector 0xF0 to target vCPU to kick the vCPU
off VMX non-root mode if it wants to do some operations on target vCPU.
However, this way doesn't work for lapic-pt vCPUs. The IPI will be delivered
to the guest directly without vmexit and the guest will receive a unexpected
interrupt. Consequently, if the guest can't handle this interrupt properly,
fatal error may happen.
The NMI can be used as the notification signal to kick the vCPU off VMX
non-root mode for lapic-pt vCPUs. So, this patch uses NMI as notification signal
to address the above issues for lapic-pt vCPUs.
Tracked-On: #3886
Acked-by: Eddie Dong <eddie.dong@intel.com>
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
Add yield support for schedule, which can give up pcpu proactively.
Tracked-On: #4178
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
IO sensitive Round-robin scheduler aim to schedule threads with
round-robin policy. Meanwhile, we also enhance it with some fairness
configuration, such as thread will be scheduled out without properly
timeslice. IO request on thread will be handled in high priority.
This patch only add a skeleton for the sched_iorr scheduler.
Tracked-On: #4178
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
kick means to notify one thread_object. If the target thread object is
running, send a IPI to notify it; if the target thread object is
runnable, make reschedule on it.
Also add kick_vcpu API in vcpu layer to notify vcpu.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
After moving softirq to following interrupt path, softirq handler might
break in the schedule spinlock context and try to grab the lock again,
then deadlock.
Disable interrupt with schedule spinlock context.
For the IRQ disable/restore operations:
CPU_INT_ALL_DISABLE(&rflag)
CPU_INT_ALL_RESTORE(rflag)
each takes 50~60 cycles.
renaming: get_schedule_lock -> obtain_schedule_lock
Tracked-On: #3813
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This patch decouple some scheduling logic and abstract into a scheduler.
Then we have scheduler, schedule framework. From modulization
perspective, schedule framework provides some APIs for other layers to
use, also interact with scheduler through scheduler interaces.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
To get pcpu_id from sched_control quickly and easier.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Let init thread end with run_idle_thread(), then idle thread take over and
start to do scheduling.
Change enter_guest_mode() to init_guest_mode() as run_idle_thread() is removed
out of it. Also add run_thread() in schedule module to run
thread_object's thread loop directly.
rename: switch_to_idle -> run_idle_thread
Tracked-On: #3813
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
sleep one thread_object means to prevent it from being scheduled.
wake one thread_object is an opposite operation of sleep.
This patch also add notify_mode in thread_object to indicate how to
deliver the request.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Now, we have three valid status for thread_object:
THREAD_STS_RUNNING,
THREAD_STS_RUNNABLE,
THREAD_STS_BLOCKED.
This patch also provide several helpers to check the thread's status and
a status set wrapper function.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
schedule infrastructure is per pcpu, so move its initialization to each
pcpu's initialization.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
With cpu sharing enabled, per_cpu vcpu cannot work properly as we might
has multiple vcpus running on one pcpu.
Add a schedule API sched_get_current to get current thread_object on
specific pcpu, also add a vcpu API get_running_vcpu to get corresponding
vcpu of the thread_object.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
With cpu sharing enabled, we will map acrn_vcpu to thread_object
in scheduling. From modulization perspective, we'd better hide the
pcpu_id in acrn_vcpu and move it to thread_object.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Currently we are using a 1:1 mapping logic for pcpu:vcpu. So don't need
a runqueue for it. Removing it as preparation work to abstract scheduler
framework.
Tracked-On: #3813
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
--remove unnecessary includes
--remove unnecssary forward-declaration for 'struct vhm_request'
Tracked-On: #861
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
As we introduced vcpu_affinity[] to assign vcpus to different pcpus, the
old policy and functions are not needed. Remove them.
Tracked-On: #3663
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Now, we create vcpus while VM being created in hypervisor. The
create vcpu hypercall will not be used any more. For compatbility,
keep the hypercall HC_CREATE_VCPU do nothing.
v4: Don't remove HC_CREATE_VCPU hypercall, let it do nothing.
Tracked-On: #3663
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Now the structures(union source & struct intr_source) are defined
in ptdev.h,they are used in vtd.c and assign.c,
vtd is the hardware layer and ptdev is the upper-layer module
from the modularization perspective, this patch move down
these structures to avoid reversed dependency.
Tracked-On: #1842
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Using per_cpu list to record ptdev interrupts is more reasonable than
recording them per-vm. It makes dispatching such interrupts more easier
as we now do it in softirq which happens following interrupt context of
each pcpu.
Tracked-On: #3663
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
From modulization perspective, it's not suitable to put pcpu and vm
related request operations in schedule. So move them to pcpu and vm
module respectively. Also change need_offline return value to bool.
Tracked-On: #3663
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
ACRN Coding guidelines requires type conversion shall be explicity. However,
there's no need for this case since we could return bool directly.
Tracked-On: #1842
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Now sched_object and sched_context are protected by scheduler_lock. There's no
chance to use runqueue_lock to protect schedule runqueue if we have no plan to
support schedule migration.
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Since spinlock ptdev_lock is used to protect ptdev entry, there's no need to
use atomic operation to protect ptdev active flag in split of it's wrong used
to protect ptdev entry. And refine active flag data type to bool.
Tracked-On: #1842
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
is_msix, part of ptirq_msi_info, is not used in the code.
Tracked-On: #3205
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
For pre-launched VMs and SOS, VM shutdown should not be executed in the
current VM context.
- implement NEED_SHUTDOWN_VM request so that the BSP of the target VM can shut
down the guest in idle thread.
- implement shutdown_vm_from_idle() to shut down target VM.
Tracked-On: #2700
Signed-off-by: Zide Chen <zide.chen@intel.com>
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
IRTE is freed if ptirq entry is released from remove_msix_remapping() or
remove_intx_remapping(). But if it's called from ptdev_release_all_entries(),
e.g. SOS shutdown/reboot, IRTE is not freed.
This patch adds a release_cb() callback function to do any architectural
specific cleanup. In x86, it's used to release IRTE.
On VM shutdown, vpci_cleanup() needs to remove MSI/MSI-X remapping on
ptirq entries, thus it should be called before ptdev_release_all_entries().
Tracked-On: #2700
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Signed-off-by: Zide Chen <zide.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
add new hypercall get platform information,
such as physical CPU number.
Tracked-On: #2538
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This patch makes make_reschedule_request support for kicking
off vCPU using INIT.
Tracked-On: #2865
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
merge include/arch/x86/irq.h and include/common/irq.h
--> include/arch/x86/irq.h
Tracked-On: #1842
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
For vcpu.c and vcpu.h,only include some necessary
header files, doesn't include hypervisor.h
Tracked-On: #1842
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
When a corresponding IOMMU is found for the device, this patch adds
support to program Interrupt Remapping hardware RTEs and the original
interrupt sources (MSI or IOAPIC) with IR format.
Tracked-On: #2426
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>
As we enable Interrupt Remapping, bit positions in MSI address and
data registers have a different syntax for programming. This patch adds
bit granularity for MSI address and data structs.
Tracked-On: #2407
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
after compile, the compiled code could change rsp, so use pure asm code
to avoid such problem which will cause schedule switch failure.
Tracked-On: #2410
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
this patch added full context switch support for scheduling, it make sure
each VCPU has its own stack, and added host_sp field in struct sched_object
to record host stack pointer for each switch out object.
Arch related function arch_switch_to is added for context switch.
To benefit debugging, a name[] field is also added into struct sched_object.
Tracked-On: #2394
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Xu, Anthony <anthony.xu@intel.com>
Under sharing mode, VM0 is identical with SOS VM. But the coupling of
SOS VM and VM 0 is not friendly for partition mode.
This patch is a pure term change of vm0 to sos VM, it does not change
any code logic or senmantic.
Tracked-On: #2291
Signed-off-by: Victor Sun <victor.sun@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
-- Change the type from uint8_t to uint32_t
-- Remove some typecast
-- Change union source_id
Tracked-On: #861
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
