On Wed 10.Mar'21 at 18:27:53 +0100, Greg Kroah-Hartman wrote:
On Thu, Mar 11, 2021 at 12:05:38AM +0800, Shuo Liu wrote:
This fixes below build warning.
../drivers/virt/acrn/vm.c:105: warning: expecting prototype for
acrn_inject_msi(). Prototype was for acrn_msi_inject() instead
That's
From: Shuo Liu
hsm.c:336:50: warning: incorrect type in argument 2 (different address spaces)
hsm.c:336:50:expected void const [noderef] __user *from
hsm.c:336:50:got void *
This patch fixes above sparse warning.
Fixes: 3d679d5aec64 ("virt: acrn: Introduce interfaces to query C-s
From: Shuo Liu
This fixes below sparse warning.
../drivers/virt/acrn/vm.c:105: warning: expecting prototype for
acrn_inject_msi(). Prototype was for acrn_msi_inject() instead
Fixes: c7cf8d27244f ("virt: acrn: Introduce interrupt injection interfaces")
Reported-by: kernel test robot
se vfs_poll() instead of f_op->poll()")
Reported-by: kernel test robot
Signed-off-by: Yejune Deng
Thanks for the patch.
Acked-by: Shuo Liu
---
drivers/virt/acrn/irqfd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/virt/acrn/irqfd.c b/drivers/virt/ac
On Wed 3.Mar'21 at 18:37:19 +0100, Borislav Petkov wrote:
On Sun, Feb 07, 2021 at 11:10:39AM +0800, shuo.a@intel.com wrote:
From: Shuo Liu
ACRN supports partition mode to achieve real-time requirements. In
partition mode, a CPU core can be dedicated to a vCPU of User VM. The
local APIC
On Fri 26.Feb'21 at 7:25:18 +0100, Greg Kroah-Hartman wrote:
On Fri, Feb 26, 2021 at 09:38:07AM +0800, Shuo A Liu wrote:
Hi Arnd,
There is already a patchset for this build issue. Please refer to
https://lore.kernel.org/lkml/20210221134339.57851-1-shuo.a@intel.com/.
Hi Greg, Would you
Hi Arnd,
There is already a patchset for this build issue. Please refer to
https://lore.kernel.org/lkml/20210221134339.57851-1-shuo.a@intel.com/.
Hi Greg,
Would you like accept that patchset in you tree?
Thanks
shuo
On Thu 25.Feb'21 at 14:38:30 +0100, Arnd Bergmann wrote:
From: Arnd
Hi,
On Tue 23.Feb'21 at 15:25:30 +, Qais Yousef wrote:
On 02/21/21 21:43, shuo.a@intel.com wrote:
From: Shuo Liu
Without cpu hotplug support, vCPU cannot be removed from a Service VM.
Don't expose remove_cpu sysfs when CONFIG_HOTPLUG_CPU disabled.
Signed-off-by: Shuo Liu
Acked
From: Shuo Liu
Without cpu hotplug support, vCPU cannot be removed from a Service VM.
Don't expose remove_cpu sysfs when CONFIG_HOTPLUG_CPU disabled.
Signed-off-by: Shuo Liu
Acked-by: Randy Dunlap # build-tested
Cc: Stephen Rothwell
Cc: Thomas Gleixner
Cc: Greg Kroah-Hartman
Cc: Qais
From: Shuo Liu
279dcf693ac7 ("virt: acrn: Introduce an interface for Service VM to
control vCPU") introduced {add,remove}_cpu() usage and it hit below
error with !CONFIG_SMP:
../drivers/virt/acrn/hsm.c: In function ‘remove_cpu_store’:
../drivers/virt/acrn/hsm.c:389:3: error
From: Yejune Deng
Use a more advanced function vfs_poll() in acrn_irqfd_assign().
At the same time, modify the definition of events.
Signed-off-by: Yejune Deng
Signed-off-by: Shuo Liu
---
drivers/virt/acrn/irqfd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git
On Sun 21.Feb'21 at 8:54:06 +0100, Greg Kroah-Hartman wrote:
On Sun, Feb 21, 2021 at 09:50:42AM +0800, Liu, Shuo A wrote:
On 2/20/2021 22:53, Yejune Deng wrote:
> Use vfs_poll() is a more advanced function in acrn_irqfd_assign().
> as the same time, modify the definition of
Thanks for the patch.
On Fri 19.Feb'21 at 17:26:12 +0800, Yejune Deng wrote:
In acrn_irqfd_assign(), use vfs_poll() is a more advanced function,
as the same time, modify the definition of events.
Signed-off-by: Yejune Deng
---
drivers/virt/acrn/irqfd.c | 4 ++--
1 file changed, 2
From: Shuo Liu
Without cpu hotplug support, vCPU cannot be removed from a Service VM.
Don't expose remove_cpu sysfs when CONFIG_HOTPLUG_CPU disabled.
Signed-off-by: Shuo Liu
---
drivers/virt/acrn/hsm.c | 9 +
1 file changed, 9 insertions(+)
diff --git a/drivers/virt/acrn/hsm.c b
From: Shuo Liu
279dcf693ac7 ("virt: acrn: Introduce an interface for Service VM to
control vCPU") introduced {add,remove}_cpu() usage and it hit below
error with !CONFIG_SMP:
../drivers/virt/acrn/hsm.c: In function ‘remove_cpu_store’:
../drivers/virt/acrn/hsm.c:389:3: error
On Fri 12.Feb'21 at 12:02:18 +0100, Greg Kroah-Hartman wrote:
On Fri, Feb 12, 2021 at 06:58:53PM +0800, Shuo A Liu wrote:
Hi Greg,
On Fri 12.Feb'21 at 8:52:33 +0100, Greg Kroah-Hartman wrote:
> On Fri, Feb 12, 2021 at 12:57:24PM +0800, shuo.a@intel.com wrote:
> > From:
Hi Greg,
On Fri 12.Feb'21 at 8:52:33 +0100, Greg Kroah-Hartman wrote:
On Fri, Feb 12, 2021 at 12:57:24PM +0800, shuo.a@intel.com wrote:
From: Shuo Liu
vCPU removing code depends on CONFIG_HOTPLUG_CPU as it uses remove_cpu()
and add_cpu(). Make the vCPU removing interface building
From: Shuo Liu
vCPU removing code depends on CONFIG_HOTPLUG_CPU as it uses remove_cpu()
and add_cpu(). Make the vCPU removing interface building with
CONFIG_HOTPLUG_CPU.
../drivers/virt/acrn/hsm.c: In function ‘remove_cpu_store’:
../drivers/virt/acrn/hsm.c:389:3: error: implicit declaration
On Tue 9.Feb'21 at 11:00:55 +0100, Greg Kroah-Hartman wrote:
On Sun, Feb 07, 2021 at 11:10:22AM +0800, shuo.a@intel.com wrote:
From: Shuo Liu
ACRN is a Type 1 reference hypervisor stack, running directly on the bare-metal
hardware, and is suitable for a variety of IoT and embedded device
Hi Randy,
On Mon 8.Feb'21 at 11:48:07 -0800, Randy Dunlap wrote:
On 2/6/21 7:10 PM, shuo.a@intel.com wrote:
From: Shuo Liu
Add documentation on the following aspects of ACRN:
1) A brief introduction on the architecture of ACRN.
2) I/O request handling in ACRN.
3) CPUID functions
From: Shuo Liu
The C-states and P-states data are used to support CPU power management.
The hypervisor controls C-states and P-states for a User VM.
ACRN userspace need to query the data from the hypervisor to build ACPI
tables for a User VM.
HSM provides ioctls for ACRN userspace to query C
From: Shuo Liu
Launch a simple guest (with several instructions as payload) on ACRN
with demonstration ioctl usage.
Signed-off-by: Shuo Liu
---
samples/acrn/Makefile| 12
samples/acrn/guest.ld| 9 +++
samples/acrn/payload.ld | 9 +++
samples/acrn/vm-sample.c | 136
From: Shuo Liu
ACRN supports partition mode to achieve real-time requirements. In
partition mode, a CPU core can be dedicated to a vCPU of User VM. The
local APIC of the dedicated CPU core can be passthrough to the User VM.
The Service VM controls the assignment of the CPU cores.
Introduce
From: Shuo Liu
irqfd is a mechanism to inject a specific interrupt to a User VM using a
decoupled eventfd mechanism.
Vhost is a kernel-level virtio server which uses eventfd for interrupt
injection. To support vhost on ACRN, irqfd is introduced in HSM.
HSM provides ioctls to associate
From: Shuo Liu
An I/O request of a User VM, which is constructed by hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.
I/O client maintains a list of address ranges. Introduce
acrn_ioreq_range_{add,del
From: Shuo Liu
PCI device passthrough enables an OS in a virtual machine to directly
access a PCI device in the host. It promises almost the native
performance, which is required in performance-critical scenarios of
ACRN.
HSM provides the following ioctls:
- Assign - ACRN_IOCTL_ASSIGN_PCIDEV
From: Shuo Liu
A User VM can access its virtual PCI configuration spaces via port IO
approach, which has two following steps:
1) writes address into port 0xCF8
2) put/get data in/from port 0xCFC
To distribute a complete PCI configuration space access one time, HSM
need to combine such two
From: Shuo Liu
ioeventfd is a mechanism to register PIO/MMIO regions to trigger an
eventfd signal when written to by a User VM. ACRN userspace can register
any arbitrary I/O address with a corresponding eventfd and then pass the
eventfd to a specific end-point of interest for handling.
Vhost
From: Shuo Liu
An I/O request of a User VM, which is constructed by the hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.
For each User VM, there is a shared 4-KByte memory region used for I/O
requests
From: Shuo Liu
ACRN userspace need to inject virtual interrupts into a User VM in
devices emulation.
HSM needs provide interfaces to do so.
Introduce following interrupt injection interfaces:
ioctl ACRN_IOCTL_SET_IRQLINE:
Pass data from userspace to the hypervisor, and inform the hypervisor
From: Shuo Liu
A virtual CPU of User VM has different context due to the different
registers state. ACRN userspace needs to set the virtual CPU
registers state (e.g. giving a initial registers state to a virtual
BSP of a User VM).
HSM provides an ioctl ACRN_IOCTL_SET_VCPU_REGS to do the virtual
From: Shuo Liu
The HSM provides hypervisor services to the ACRN userspace. While
launching a User VM, ACRN userspace needs to allocate memory and request
the ACRN Hypervisor to set up the EPT mapping for the VM.
A mapping cache is introduced for accelerating the translation between
the Service
From: Shuo Liu
The Service VM communicates with the hypervisor via conventional
hypercalls. VMCALL instruction is used to make the hypercalls.
ACRN hypercall ABI:
* Hypercall number is in R8 register.
* Up to 2 parameters are in RDI and RSI registers.
* Return value is in RAX register
From: Shuo Liu
ACRN Hypervisor Service Module (HSM) is a kernel module in Service VM
which communicates with ACRN userspace through ioctls and talks to ACRN
Hypervisor through hypercalls.
Add a basic HSM driver which allows Service VM userspace to communicate
with ACRN. The following patches
From: Shuo Liu
The VM management interfaces expose several VM operations to ACRN
userspace via ioctls. For example, creating VM, starting VM, destroying
VM and so on.
The ACRN Hypervisor needs to exchange data with the ACRN userspace
during the VM operations. HSM provides VM operation ioctls
From: Shuo Liu
The ACRN Hypervisor builds an I/O request when a trapped I/O access
happens in User VM. Then, ACRN Hypervisor issues an upcall by sending
a notification interrupt to the Service VM. HSM in the Service VM needs
to hook the notification interrupt to handle I/O requests
From: Yin Fengwei
ACRN Hypervisor reports hypervisor features via CPUID leaf 0x4001
which is similar to KVM. A VM can check if it's the privileged VM using
the feature bits. The Service VM is the only privileged VM by design.
Signed-off-by: Yin Fengwei
Signed-off-by: Shuo Liu
Reviewed
From: Shuo Liu
Add documentation on the following aspects of ACRN:
1) A brief introduction on the architecture of ACRN.
2) I/O request handling in ACRN.
3) CPUID functions of ACRN.
To learn more about ACRN, please go to ACRN project website
https://projectacrn.org, or the documentation
From: Shuo Liu
ACRN is a Type 1 reference hypervisor stack, running directly on the bare-metal
hardware, and is suitable for a variety of IoT and embedded device solutions.
ACRN implements a hybrid VMM architecture, using a privileged Service VM. The
Service VM manages the system resources (CPU
On Wed 27.Jan'21 at 15:20:34 +0100, Greg Kroah-Hartman wrote:
On Fri, Jan 22, 2021 at 07:01:19PM +0800, shuo.a@intel.com wrote:
From: Shuo Liu
ioeventfd is a mechanism to register PIO/MMIO regions to trigger an
eventfd signal when written to by a User VM. ACRN userspace can register
any
From: Shuo Liu
The ACRN Hypervisor builds an I/O request when a trapped I/O access
happens in User VM. Then, ACRN Hypervisor issues an upcall by sending
a notification interrupt to the Service VM. HSM in the Service VM needs
to hook the notification interrupt to handle I/O requests
From: Yin Fengwei
ACRN Hypervisor reports hypervisor features via CPUID leaf 0x4001
which is similar to KVM. A VM can check if it's the privileged VM using
the feature bits. The Service VM is the only privileged VM by design.
Signed-off-by: Yin Fengwei
Signed-off-by: Shuo Liu
Reviewed
From: Shuo Liu
The HSM provides hypervisor services to the ACRN userspace. While
launching a User VM, ACRN userspace needs to allocate memory and request
the ACRN Hypervisor to set up the EPT mapping for the VM.
A mapping cache is introduced for accelerating the translation between
the Service
From: Shuo Liu
ACRN Hypervisor Service Module (HSM) is a kernel module in Service VM
which communicates with ACRN userspace through ioctls and talks to ACRN
Hypervisor through hypercalls.
Add a basic HSM driver which allows Service VM userspace to communicate
with ACRN. The following patches
From: Shuo Liu
The VM management interfaces expose several VM operations to ACRN
userspace via ioctls. For example, creating VM, starting VM, destroying
VM and so on.
The ACRN Hypervisor needs to exchange data with the ACRN userspace
during the VM operations. HSM provides VM operation ioctls
From: Shuo Liu
The Service VM communicates with the hypervisor via conventional
hypercalls. VMCALL instruction is used to make the hypercalls.
ACRN hypercall ABI:
* Hypercall number is in R8 register.
* Up to 2 parameters are in RDI and RSI registers.
* Return value is in RAX register
From: Shuo Liu
A virtual CPU of User VM has different context due to the different
registers state. ACRN userspace needs to set the virtual CPU
registers state (e.g. giving a initial registers state to a virtual
BSP of a User VM).
HSM provides an ioctl ACRN_IOCTL_SET_VCPU_REGS to do the virtual
From: Shuo Liu
ACRN userspace need to inject virtual interrupts into a User VM in
devices emulation.
HSM needs provide interfaces to do so.
Introduce following interrupt injection interfaces:
ioctl ACRN_IOCTL_SET_IRQLINE:
Pass data from userspace to the hypervisor, and inform the hypervisor
From: Shuo Liu
Launch a simple guest (with several instructions as payload) on ACRN
with demonstration ioctl usage.
Signed-off-by: Shuo Liu
---
samples/acrn/Makefile| 12
samples/acrn/guest.ld| 9 +++
samples/acrn/payload.ld | 9 +++
samples/acrn/vm-sample.c | 136
From: Shuo Liu
An I/O request of a User VM, which is constructed by hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.
I/O client maintains a list of address ranges. Introduce
acrn_ioreq_range_{add,del
From: Shuo Liu
The C-states and P-states data are used to support CPU power management.
The hypervisor controls C-states and P-states for a User VM.
ACRN userspace need to query the data from the hypervisor to build ACPI
tables for a User VM.
HSM provides ioctls for ACRN userspace to query C
From: Shuo Liu
ACRN supports partition mode to achieve real-time requirements. In
partition mode, a CPU core can be dedicated to a vCPU of User VM. The
local APIC of the dedicated CPU core can be passthrough to the User VM.
The Service VM controls the assignment of the CPU cores.
Introduce
From: Shuo Liu
An I/O request of a User VM, which is constructed by the hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.
For each User VM, there is a shared 4-KByte memory region used for I/O
requests
From: Shuo Liu
ioeventfd is a mechanism to register PIO/MMIO regions to trigger an
eventfd signal when written to by a User VM. ACRN userspace can register
any arbitrary I/O address with a corresponding eventfd and then pass the
eventfd to a specific end-point of interest for handling.
Vhost
From: Shuo Liu
PCI device passthrough enables an OS in a virtual machine to directly
access a PCI device in the host. It promises almost the native
performance, which is required in performance-critical scenarios of
ACRN.
HSM provides the following ioctls:
- Assign - ACRN_IOCTL_ASSIGN_PCIDEV
From: Shuo Liu
irqfd is a mechanism to inject a specific interrupt to a User VM using a
decoupled eventfd mechanism.
Vhost is a kernel-level virtio server which uses eventfd for interrupt
injection. To support vhost on ACRN, irqfd is introduced in HSM.
HSM provides ioctls to associate
From: Shuo Liu
ACRN is a Type 1 reference hypervisor stack, running directly on the bare-metal
hardware, and is suitable for a variety of IoT and embedded device solutions.
ACRN implements a hybrid VMM architecture, using a privileged Service VM. The
Service VM manages the system resources (CPU
From: Shuo Liu
A User VM can access its virtual PCI configuration spaces via port IO
approach, which has two following steps:
1) writes address into port 0xCF8
2) put/get data in/from port 0xCFC
To distribute a complete PCI configuration space access one time, HSM
need to combine such two
From: Shuo Liu
Add documentation on the following aspects of ACRN:
1) A brief introduction on the architecture of ACRN.
2) I/O request handling in ACRN.
3) CPUID functions of ACRN.
To learn more about ACRN, please go to ACRN project website
https://projectacrn.org, or the documentation
Hi Randy,
Thanks for review.
On Mon 18.Jan'21 at 14:30:51 -0800, Randy Dunlap wrote:
On 1/5/21 11:50 PM, shuo.a@intel.com wrote:
From: Shuo Liu
Add documentation on the following aspects of ACRN:
1) A brief introduction on the architecture of ACRN.
2) I/O request handling in ACRN
On Mon 11.Jan'21 at 13:52:19 -0800, Davidlohr Bueso wrote:
On Wed, 06 Jan 2021, shuo.a@intel.com wrote:
The processing flow of I/O requests are listed as following:
a) The I/O handler of the hypervisor will fill an I/O request with
PENDING state when a trapped I/O access happens in a User
On Fri 8.Jan'21 at 16:34:06 +0100, Greg Kroah-Hartman wrote:
On Wed, Jan 06, 2021 at 03:50:45PM +0800, shuo.a@intel.com wrote:
+/**
+ * struct acrn_vm_memmap - A EPT memory mapping info for a User VM.
+ * @type: Type of the memory mapping (ACRM_MEMMAP_*).
+ *
On Fri 8.Jan'21 at 16:33:22 +0100, Greg Kroah-Hartman wrote:
On Wed, Jan 06, 2021 at 03:50:44PM +0800, shuo.a@intel.com wrote:
From: Shuo Liu
A virtual CPU of User VM has different context due to the different
registers state. ACRN userspace needs to set the virtual CPU
registers state
On Fri 8.Jan'21 at 16:31:34 +0100, Greg Kroah-Hartman wrote:
On Wed, Jan 06, 2021 at 03:50:43PM +0800, shuo.a@intel.com wrote:
From: Shuo Liu
The VM management interfaces expose several VM operations to ACRN
userspace via ioctls. For example, creating VM, starting VM, destroying
VM
On Tue 5.Jan'21 at 15:03:06 +0100, Greg Kroah-Hartman wrote:
On Tue, Dec 15, 2020 at 06:02:51PM +0800, Shuo A Liu wrote:
On Tue 15.Dec'20 at 11:00:57 +0100, Greg Kroah-Hartman wrote:
> On Tue, Dec 15, 2020 at 05:52:59PM +0800, Shuo A Liu wrote:
> > On Wed 2.Dec'20 at 10:14:29 +0
From: Shuo Liu
Launch a simple guest (with several instructions as payload) on ACRN
with demonstration ioctl usage.
Signed-off-by: Shuo Liu
---
samples/acrn/Makefile| 12
samples/acrn/guest.ld| 9 +++
samples/acrn/payload.ld | 9 +++
samples/acrn/vm-sample.c | 136
From: Shuo Liu
irqfd is a mechanism to inject a specific interrupt to a User VM using a
decoupled eventfd mechanism.
Vhost is a kernel-level virtio server which uses eventfd for interrupt
injection. To support vhost on ACRN, irqfd is introduced in HSM.
HSM provides ioctls to associate
From: Shuo Liu
ACRN supports partition mode to achieve real-time requirements. In
partition mode, a CPU core can be dedicated to a vCPU of User VM. The
local APIC of the dedicated CPU core can be passthrough to the User VM.
The Service VM controls the assignment of the CPU cores.
Introduce
On Wed 30.Dec'20 at 18:33:05 +0100, Borislav Petkov wrote:
On Tue, Dec 01, 2020 at 05:38:39PM +0800, shuo.a@intel.com wrote:
From: Shuo Liu
The Service VM communicates with the hypervisor via conventional
hypercalls. VMCALL instruction is used to make the hypercalls.
ACRN hypercall ABI
From: Shuo Liu
The C-states and P-states data are used to support CPU power management.
The hypervisor controls C-states and P-states for a User VM.
ACRN userspace need to query the data from the hypervisor to build ACPI
tables for a User VM.
HSM provides ioctls for ACRN userspace to query C
From: Shuo Liu
ioeventfd is a mechanism to register PIO/MMIO regions to trigger an
eventfd signal when written to by a User VM. ACRN userspace can register
any arbitrary I/O address with a corresponding eventfd and then pass the
eventfd to a specific end-point of interest for handling.
Vhost
From: Shuo Liu
ACRN userspace need to inject virtual interrupts into a User VM in
devices emulation.
HSM needs provide interfaces to do so.
Introduce following interrupt injection interfaces:
ioctl ACRN_IOCTL_SET_IRQLINE:
Pass data from userspace to the hypervisor, and inform the hypervisor
From: Shuo Liu
An I/O request of a User VM, which is constructed by hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.
I/O client maintains a list of address ranges. Introduce
acrn_ioreq_range_{add,del
From: Shuo Liu
PCI device passthrough enables an OS in a virtual machine to directly
access a PCI device in the host. It promises almost the native
performance, which is required in performance-critical scenarios of
ACRN.
HSM provides the following ioctls:
- Assign - ACRN_IOCTL_ASSIGN_PCIDEV
From: Shuo Liu
An I/O request of a User VM, which is constructed by the hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.
For each User VM, there is a shared 4-KByte memory region used for I/O
requests
From: Shuo Liu
A User VM can access its virtual PCI configuration spaces via port IO
approach, which has two following steps:
1) writes address into port 0xCF8
2) put/get data in/from port 0xCFC
To distribute a complete PCI configuration space access one time, HSM
need to combine such two
From: Shuo Liu
The HSM provides hypervisor services to the ACRN userspace. While
launching a User VM, ACRN userspace needs to allocate memory and request
the ACRN Hypervisor to set up the EPT mapping for the VM.
A mapping cache is introduced for accelerating the translation between
the Service
From: Shuo Liu
A virtual CPU of User VM has different context due to the different
registers state. ACRN userspace needs to set the virtual CPU
registers state (e.g. giving a initial registers state to a virtual
BSP of a User VM).
HSM provides an ioctl ACRN_IOCTL_SET_VCPU_REGS to do the virtual
From: Shuo Liu
ACRN Hypervisor Service Module (HSM) is a kernel module in Service VM
which communicates with ACRN userspace through ioctls and talks to ACRN
Hypervisor through hypercalls.
Add a basic HSM driver which allows Service VM userspace to communicate
with ACRN. The following patches
From: Shuo Liu
The VM management interfaces expose several VM operations to ACRN
userspace via ioctls. For example, creating VM, starting VM, destroying
VM and so on.
The ACRN Hypervisor needs to exchange data with the ACRN userspace
during the VM operations. HSM provides VM operation ioctls
From: Shuo Liu
The Service VM communicates with the hypervisor via conventional
hypercalls. VMCALL instruction is used to make the hypercalls.
ACRN hypercall ABI:
* Hypercall number is in R8 register.
* Up to 2 parameters are in RDI and RSI registers.
* Return value is in RAX register
From: Yin Fengwei
ACRN Hypervisor reports hypervisor features via CPUID leaf 0x4001
which is similar to KVM. A VM can check if it's the privileged VM using
the feature bits. The Service VM is the only privileged VM by design.
Signed-off-by: Yin Fengwei
Signed-off-by: Shuo Liu
Reviewed
From: Shuo Liu
The ACRN Hypervisor builds an I/O request when a trapped I/O access
happens in User VM. Then, ACRN Hypervisor issues an upcall by sending
a notification interrupt to the Service VM. HSM in the Service VM needs
to hook the notification interrupt to handle I/O requests
From: Shuo Liu
Add documentation on the following aspects of ACRN:
1) A brief introduction on the architecture of ACRN.
2) I/O request handling in ACRN.
3) CPUID functions of ACRN.
To learn more about ACRN, please go to ACRN project website
https://projectacrn.org, or the documentation
From: Shuo Liu
ACRN is a Type 1 reference hypervisor stack, running directly on the bare-metal
hardware, and is suitable for a variety of IoT and embedded device solutions.
ACRN implements a hybrid VMM architecture, using a privileged Service VM. The
Service VM manages the system resources (CPU
On Tue 15.Dec'20 at 11:00:57 +0100, Greg Kroah-Hartman wrote:
On Tue, Dec 15, 2020 at 05:52:59PM +0800, Shuo A Liu wrote:
On Wed 2.Dec'20 at 10:14:29 +0800, Shuo A Liu wrote:
> On Tue 1.Dec'20 at 11:09:47 +0100, Greg Kroah-Hartman wrote:
> > On Tue, Dec 01, 2020 at 05:38:41PM +080
On Wed 2.Dec'20 at 10:14:29 +0800, Shuo A Liu wrote:
On Tue 1.Dec'20 at 11:09:47 +0100, Greg Kroah-Hartman wrote:
On Tue, Dec 01, 2020 at 05:38:41PM +0800, shuo.a@intel.com wrote:
+ vm_param->reserved0 = 0;
+ vm_param->reserved1 = 0;
NO!
This
On Tue 8.Dec'20 at 12:52:49 +0100, Borislav Petkov wrote:
On Tue, Dec 01, 2020 at 05:38:36PM +0800, shuo.a@intel.com wrote:
From: Shuo Liu
Add documentation on the following aspects of ACRN:
Thanks for doing this!
+===
+ACRN CPUID bits
+===
+
+A guest VM
On Tue 1.Dec'20 at 11:09:47 +0100, Greg Kroah-Hartman wrote:
On Tue, Dec 01, 2020 at 05:38:41PM +0800, shuo.a@intel.com wrote:
+ vm_param->reserved0 = 0;
+ vm_param->reserved1 = 0;
NO!
This means that userspace can put whatever crud they want in those
fields,
From: Shuo Liu
ioeventfd is a mechanism to register PIO/MMIO regions to trigger an
eventfd signal when written to by a User VM. ACRN userspace can register
any arbitrary I/O address with a corresponding eventfd and then pass the
eventfd to a specific end-point of interest for handling.
Vhost
From: Shuo Liu
Launch a simple guest (with several instructions as payload) on ACRN
with demonstration ioctl usage.
Signed-off-by: Shuo Liu
---
samples/acrn/Makefile| 12
samples/acrn/guest.ld| 9 +++
samples/acrn/payload.ld | 9 +++
samples/acrn/vm-sample.c | 136
From: Shuo Liu
ACRN supports partition mode to achieve real-time requirements. In
partition mode, a CPU core can be dedicated to a vCPU of User VM. The
local APIC of the dedicated CPU core can be passthrough to the User VM.
The Service VM controls the assignment of the CPU cores.
Introduce
From: Shuo Liu
An I/O request of a User VM, which is constructed by hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.
I/O client maintains a list of address ranges. Introduce
acrn_ioreq_range_{add,del
From: Shuo Liu
PCI device passthrough enables an OS in a virtual machine to directly
access a PCI device in the host. It promises almost the native
performance, which is required in performance-critical scenarios of
ACRN.
HSM provides the following ioctls:
- Assign - ACRN_IOCTL_ASSIGN_PCIDEV
From: Shuo Liu
The C-states and P-states data are used to support CPU power management.
The hypervisor controls C-states and P-states for a User VM.
ACRN userspace need to query the data from the hypervisor to build ACPI
tables for a User VM.
HSM provides ioctls for ACRN userspace to query C
From: Shuo Liu
A User VM can access its virtual PCI configuration spaces via port IO
approach, which has two following steps:
1) writes address into port 0xCF8
2) put/get data in/from port 0xCFC
To distribute a complete PCI configuration space access one time, HSM
need to combine such two
From: Shuo Liu
irqfd is a mechanism to inject a specific interrupt to a User VM using a
decoupled eventfd mechanism.
Vhost is a kernel-level virtio server which uses eventfd for interrupt
injection. To support vhost on ACRN, irqfd is introduced in HSM.
HSM provides ioctls to associate
From: Shuo Liu
An I/O request of a User VM, which is constructed by the hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.
For each User VM, there is a shared 4-KByte memory region used for I/O
requests
From: Shuo Liu
ACRN userspace need to inject virtual interrupts into a User VM in
devices emulation.
HSM needs provide interfaces to do so.
Introduce following interrupt injection interfaces:
ioctl ACRN_IOCTL_SET_IRQLINE:
Pass data from userspace to the hypervisor, and inform the hypervisor
From: Shuo Liu
ACRN Hypervisor Service Module (HSM) is a kernel module in Service VM
which communicates with ACRN userspace through ioctls and talks to ACRN
Hypervisor through hypercalls.
Add a basic HSM driver which allows Service VM userspace to communicate
with ACRN. The following patches
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