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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v5 30/35] OvmfPkg/OvmfXen: Introduce XenTimerDxe
"OvmfPkg/8254TimerDxe" is replaced with a Xen-specific EFI_TIMER_ARCH_PROTOCOL implementation. Also remove 8259InterruptControllerDxe as it is not used anymore. This Timer uses the local APIC timer as time source as it can work on both a Xen PVH guest and an HVM one. Based on the "OvmfPkg/8254TimerDxe" implementation. Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689 Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx> Acked-by: Laszlo Ersek <lersek@xxxxxxxxxx> --- Notes: v4: - fix the commit message to reflect the fact that the original code as moved. - Update Maintainers.txt v3: - rebased, SPDX, copyright v2: - Use InitializeApicTimer instead of WriteLocalApicReg - rework comments (remove many that don't apply) - remove unused includes, and libs - have a macro to the timervector. - cleanup, copyright - rework calculation of TimerCount, value to be use by the APIC timer - check for overflow of TimerPeriod, with the apic timer, the period can be up to about 42s on Xen (or even higher by changing the DivideValue). OvmfPkg/OvmfXen.dsc | 3 +- OvmfPkg/OvmfXen.fdf | 3 +- OvmfPkg/XenTimerDxe/XenTimerDxe.inf | 42 ++++ OvmfPkg/XenTimerDxe/XenTimerDxe.h | 177 ++++++++++++++ OvmfPkg/XenTimerDxe/XenTimerDxe.c | 355 ++++++++++++++++++++++++++++ Maintainers.txt | 1 + 6 files changed, 577 insertions(+), 4 deletions(-) create mode 100644 OvmfPkg/XenTimerDxe/XenTimerDxe.inf create mode 100644 OvmfPkg/XenTimerDxe/XenTimerDxe.h create mode 100644 OvmfPkg/XenTimerDxe/XenTimerDxe.c diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc index 477d8c76a1..54ac910d8e 100644 --- a/OvmfPkg/OvmfXen.dsc +++ b/OvmfPkg/OvmfXen.dsc @@ -547,10 +547,9 @@ [Components] MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf MdeModulePkg/Universal/EbcDxe/EbcDxe.inf - OvmfPkg/8259InterruptControllerDxe/8259.inf + OvmfPkg/XenTimerDxe/XenTimerDxe.inf UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf UefiCpuPkg/CpuDxe/CpuDxe.inf - OvmfPkg/8254TimerDxe/8254Timer.inf OvmfPkg/IncompatiblePciDeviceSupportDxe/IncompatiblePciDeviceSupport.inf OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.inf MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf { diff --git a/OvmfPkg/OvmfXen.fdf b/OvmfPkg/OvmfXen.fdf index 49997fee9b..fa0830a324 100644 --- a/OvmfPkg/OvmfXen.fdf +++ b/OvmfPkg/OvmfXen.fdf @@ -298,10 +298,9 @@ [FV.DXEFV] INF MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf INF MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf INF MdeModulePkg/Universal/EbcDxe/EbcDxe.inf -INF OvmfPkg/8259InterruptControllerDxe/8259.inf +INF OvmfPkg/XenTimerDxe/XenTimerDxe.inf INF UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf INF UefiCpuPkg/CpuDxe/CpuDxe.inf -INF OvmfPkg/8254TimerDxe/8254Timer.inf INF OvmfPkg/IncompatiblePciDeviceSupportDxe/IncompatiblePciDeviceSupport.inf INF OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.inf INF MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf diff --git a/OvmfPkg/XenTimerDxe/XenTimerDxe.inf b/OvmfPkg/XenTimerDxe/XenTimerDxe.inf new file mode 100644 index 0000000000..add1d01bbf --- /dev/null +++ b/OvmfPkg/XenTimerDxe/XenTimerDxe.inf @@ -0,0 +1,42 @@ +## @file +# Local APIC timer driver that provides Timer Arch protocol. +# +# Copyright (c) 2005 - 2019, Intel Corporation. All rights reserved.<BR> +# Copyright (c) 2019, Citrix Systems, Inc. +# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION = 0x00010005 + BASE_NAME = XenTimerDxe + FILE_GUID = 52fe8196-f9de-4d07-b22f-51f77a0e7c41 + MODULE_TYPE = DXE_DRIVER + VERSION_STRING = 1.0 + + ENTRY_POINT = TimerDriverInitialize + +[Packages] + MdePkg/MdePkg.dec + UefiCpuPkg/UefiCpuPkg.dec + OvmfPkg/OvmfPkg.dec + +[LibraryClasses] + UefiBootServicesTableLib + BaseLib + DebugLib + UefiDriverEntryPoint + LocalApicLib + +[Sources] + XenTimerDxe.h + XenTimerDxe.c + +[Protocols] + gEfiCpuArchProtocolGuid ## CONSUMES + gEfiTimerArchProtocolGuid ## PRODUCES +[Pcd] + gEfiMdePkgTokenSpaceGuid.PcdFSBClock ## CONSUMES +[Depex] + gEfiCpuArchProtocolGuid diff --git a/OvmfPkg/XenTimerDxe/XenTimerDxe.h b/OvmfPkg/XenTimerDxe/XenTimerDxe.h new file mode 100644 index 0000000000..e0a3d95fd0 --- /dev/null +++ b/OvmfPkg/XenTimerDxe/XenTimerDxe.h @@ -0,0 +1,177 @@ +/** @file + Private data structures + +Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR> +Copyright (c) 2019, Citrix Systems, Inc. + +SPDX-License-Identifier: BSD-2-Clause-Patent +**/ + +#ifndef _TIMER_H_ +#define _TIMER_H_ + +#include <PiDxe.h> + +#include <Protocol/Cpu.h> +#include <Protocol/Timer.h> + +#include <Register/LocalApic.h> + +#include <Library/UefiBootServicesTableLib.h> +#include <Library/BaseLib.h> +#include <Library/DebugLib.h> +#include <Library/LocalApicLib.h> +#include <Library/PcdLib.h> + +// The default timer tick duration is set to 10 ms = 100000 100 ns units +// +#define DEFAULT_TIMER_TICK_DURATION 100000 + +// +// The Timer Vector use for interrupt +// +#define LOCAL_APIC_TIMER_VECTOR 32 + +// +// Function Prototypes +// +/** + Initialize the Timer Architectural Protocol driver + + @param ImageHandle ImageHandle of the loaded driver + @param SystemTable Pointer to the System Table + + @retval EFI_SUCCESS Timer Architectural Protocol created + @retval EFI_OUT_OF_RESOURCES Not enough resources available to initialize driver. + @retval EFI_DEVICE_ERROR A device error occurred attempting to initialize the driver. + +**/ +EFI_STATUS +EFIAPI +TimerDriverInitialize ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +; + +/** + + This function adjusts the period of timer interrupts to the value specified + by TimerPeriod. If the timer period is updated, then the selected timer + period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is returned. + If an error occurs while attempting to update the timer period, then the + timer hardware will be put back in its state prior to this call, and + EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt + is disabled. This is not the same as disabling the CPU's interrupts. + Instead, it must either turn off the timer hardware, or it must adjust the + interrupt controller so that a CPU interrupt is not generated when the timer + interrupt fires. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param NotifyFunction The rate to program the timer interrupt in 100 nS units. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is + returned. If the timer is programmable, then the timer period + will be rounded up to the nearest timer period that is supported + by the timer hardware. If TimerPeriod is set to 0, then the + timer interrupts will be disabled. + + @retval EFI_SUCCESS The timer period was changed. + @retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error. + +**/ +EFI_STATUS +EFIAPI +TimerDriverRegisterHandler ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN EFI_TIMER_NOTIFY NotifyFunction + ) +; + +/** + + This function adjusts the period of timer interrupts to the value specified + by TimerPeriod. If the timer period is updated, then the selected timer + period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is returned. + If an error occurs while attempting to update the timer period, then the + timer hardware will be put back in its state prior to this call, and + EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt + is disabled. This is not the same as disabling the CPU's interrupts. + Instead, it must either turn off the timer hardware, or it must adjust the + interrupt controller so that a CPU interrupt is not generated when the timer + interrupt fires. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod The rate to program the timer interrupt in 100 nS units. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is + returned. If the timer is programmable, then the timer period + will be rounded up to the nearest timer period that is supported + by the timer hardware. If TimerPeriod is set to 0, then the + timer interrupts will be disabled. + + @retval EFI_SUCCESS The timer period was changed. + @retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error. + +**/ +EFI_STATUS +EFIAPI +TimerDriverSetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN UINT64 TimerPeriod + ) +; + +/** + + This function retrieves the period of timer interrupts in 100 ns units, + returns that value in TimerPeriod, and returns EFI_SUCCESS. If TimerPeriod + is NULL, then EFI_INVALID_PARAMETER is returned. If a TimerPeriod of 0 is + returned, then the timer is currently disabled. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod A pointer to the timer period to retrieve in 100 ns units. If + 0 is returned, then the timer is currently disabled. + + @retval EFI_SUCCESS The timer period was returned in TimerPeriod. + @retval EFI_INVALID_PARAMETER TimerPeriod is NULL. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + OUT UINT64 *TimerPeriod + ) +; + +/** + + This function generates a soft timer interrupt. If the platform does not support soft + timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned. + If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler() + service, then a soft timer interrupt will be generated. If the timer interrupt is + enabled when this service is called, then the registered handler will be invoked. The + registered handler should not be able to distinguish a hardware-generated timer + interrupt from a software-generated timer interrupt. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + + @retval EFI_SUCCESS The soft timer interrupt was generated. + @retval EFI_UNSUPPORTED The platform does not support the generation of soft timer interrupts. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGenerateSoftInterrupt ( + IN EFI_TIMER_ARCH_PROTOCOL *This + ) +; + +#endif diff --git a/OvmfPkg/XenTimerDxe/XenTimerDxe.c b/OvmfPkg/XenTimerDxe/XenTimerDxe.c new file mode 100644 index 0000000000..9f9e04766c --- /dev/null +++ b/OvmfPkg/XenTimerDxe/XenTimerDxe.c @@ -0,0 +1,355 @@ +/** @file + Timer Architectural Protocol as defined in the DXE CIS + +Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR> +Copyright (c) 2019, Citrix Systems, Inc. + +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include "XenTimerDxe.h" + +// +// The handle onto which the Timer Architectural Protocol will be installed +// +EFI_HANDLE mTimerHandle = NULL; + +// +// The Timer Architectural Protocol that this driver produces +// +EFI_TIMER_ARCH_PROTOCOL mTimer = { + TimerDriverRegisterHandler, + TimerDriverSetTimerPeriod, + TimerDriverGetTimerPeriod, + TimerDriverGenerateSoftInterrupt +}; + +// +// Pointer to the CPU Architectural Protocol instance +// +EFI_CPU_ARCH_PROTOCOL *mCpu; + +// +// The notification function to call on every timer interrupt. +// A bug in the compiler prevents us from initializing this here. +// +EFI_TIMER_NOTIFY mTimerNotifyFunction; + +// +// The current period of the timer interrupt +// +volatile UINT64 mTimerPeriod = 0; + +// +// Worker Functions +// +/** + Interrupt Handler. + + @param InterruptType The type of interrupt that occurred + @param SystemContext A pointer to the system context when the interrupt occurred +**/ +VOID +EFIAPI +TimerInterruptHandler ( + IN EFI_EXCEPTION_TYPE InterruptType, + IN EFI_SYSTEM_CONTEXT SystemContext + ) +{ + EFI_TPL OriginalTPL; + + OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL); + + SendApicEoi(); + + if (mTimerNotifyFunction != NULL) { + // + // @bug : This does not handle missed timer interrupts + // + mTimerNotifyFunction (mTimerPeriod); + } + + gBS->RestoreTPL (OriginalTPL); +} + +/** + + This function registers the handler NotifyFunction so it is called every time + the timer interrupt fires. It also passes the amount of time since the last + handler call to the NotifyFunction. If NotifyFunction is NULL, then the + handler is unregistered. If the handler is registered, then EFI_SUCCESS is + returned. If the CPU does not support registering a timer interrupt handler, + then EFI_UNSUPPORTED is returned. If an attempt is made to register a handler + when a handler is already registered, then EFI_ALREADY_STARTED is returned. + If an attempt is made to unregister a handler when a handler is not registered, + then EFI_INVALID_PARAMETER is returned. If an error occurs attempting to + register the NotifyFunction with the timer interrupt, then EFI_DEVICE_ERROR + is returned. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param NotifyFunction The function to call when a timer interrupt fires. This + function executes at TPL_HIGH_LEVEL. The DXE Core will + register a handler for the timer interrupt, so it can know + how much time has passed. This information is used to + signal timer based events. NULL will unregister the handler. + + @retval EFI_SUCCESS The timer handler was registered. + @retval EFI_UNSUPPORTED The platform does not support timer interrupts. + @retval EFI_ALREADY_STARTED NotifyFunction is not NULL, and a handler is already + registered. + @retval EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not + previously registered. + @retval EFI_DEVICE_ERROR The timer handler could not be registered. + +**/ +EFI_STATUS +EFIAPI +TimerDriverRegisterHandler ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN EFI_TIMER_NOTIFY NotifyFunction + ) +{ + // + // Check for invalid parameters + // + if (NotifyFunction == NULL && mTimerNotifyFunction == NULL) { + return EFI_INVALID_PARAMETER; + } + + if (NotifyFunction != NULL && mTimerNotifyFunction != NULL) { + return EFI_ALREADY_STARTED; + } + + mTimerNotifyFunction = NotifyFunction; + + return EFI_SUCCESS; +} + +/** + + This function adjusts the period of timer interrupts to the value specified + by TimerPeriod. If the timer period is updated, then the selected timer + period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is returned. + If an error occurs while attempting to update the timer period, then the + timer hardware will be put back in its state prior to this call, and + EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt + is disabled. This is not the same as disabling the CPU's interrupts. + Instead, it must either turn off the timer hardware, or it must adjust the + interrupt controller so that a CPU interrupt is not generated when the timer + interrupt fires. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod The rate to program the timer interrupt in 100 nS units. If + the timer hardware is not programmable, then EFI_UNSUPPORTED is + returned. If the timer is programmable, then the timer period + will be rounded up to the nearest timer period that is supported + by the timer hardware. If TimerPeriod is set to 0, then the + timer interrupts will be disabled. + + @retval EFI_SUCCESS The timer period was changed. + @retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt. + @retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error. + +**/ +EFI_STATUS +EFIAPI +TimerDriverSetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + IN UINT64 TimerPeriod + ) +{ + UINT64 TimerCount; + UINT32 TimerFrequency; + UINTN DivideValue = 1; + + if (TimerPeriod == 0) { + // + // Disable timer interrupt for a TimerPeriod of 0 + // + DisableApicTimerInterrupt(); + } else { + TimerFrequency = PcdGet32(PcdFSBClock) / DivideValue; + + // + // Convert TimerPeriod into local APIC counts + // + // TimerPeriod is in 100ns + // TimerPeriod/10000000 will be in seconds. + TimerCount = DivU64x32 (MultU64x32 (TimerPeriod, TimerFrequency), + 10000000); + + // Check for overflow + if (TimerCount > MAX_UINT32) { + TimerCount = MAX_UINT32; + /* TimerPeriod = (MAX_UINT32 / TimerFrequency) * 10000000; */ + TimerPeriod = 429496730; + } + + // + // Program the timer with the new count value + // + InitializeApicTimer(DivideValue, TimerCount, TRUE, LOCAL_APIC_TIMER_VECTOR); + + // + // Enable timer interrupt + // + EnableApicTimerInterrupt(); + } + // + // Save the new timer period + // + mTimerPeriod = TimerPeriod; + + return EFI_SUCCESS; +} + +/** + + This function retrieves the period of timer interrupts in 100 ns units, + returns that value in TimerPeriod, and returns EFI_SUCCESS. If TimerPeriod + is NULL, then EFI_INVALID_PARAMETER is returned. If a TimerPeriod of 0 is + returned, then the timer is currently disabled. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + @param TimerPeriod A pointer to the timer period to retrieve in 100 ns units. If + 0 is returned, then the timer is currently disabled. + + @retval EFI_SUCCESS The timer period was returned in TimerPeriod. + @retval EFI_INVALID_PARAMETER TimerPeriod is NULL. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGetTimerPeriod ( + IN EFI_TIMER_ARCH_PROTOCOL *This, + OUT UINT64 *TimerPeriod + ) +{ + if (TimerPeriod == NULL) { + return EFI_INVALID_PARAMETER; + } + + *TimerPeriod = mTimerPeriod; + + return EFI_SUCCESS; +} + +/** + + This function generates a soft timer interrupt. If the platform does not support soft + timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned. + If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler() + service, then a soft timer interrupt will be generated. If the timer interrupt is + enabled when this service is called, then the registered handler will be invoked. The + registered handler should not be able to distinguish a hardware-generated timer + interrupt from a software-generated timer interrupt. + + + @param This The EFI_TIMER_ARCH_PROTOCOL instance. + + @retval EFI_SUCCESS The soft timer interrupt was generated. + @retval EFI_UNSUPPORTED The platform does not support the generation of soft timer interrupts. + +**/ +EFI_STATUS +EFIAPI +TimerDriverGenerateSoftInterrupt ( + IN EFI_TIMER_ARCH_PROTOCOL *This + ) +{ + EFI_TPL OriginalTPL; + + if (GetApicTimerInterruptState()) { + // + // Invoke the registered handler + // + OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL); + + if (mTimerNotifyFunction != NULL) { + // + // @bug : This does not handle missed timer interrupts + // + mTimerNotifyFunction (mTimerPeriod); + } + + gBS->RestoreTPL (OriginalTPL); + } else { + return EFI_UNSUPPORTED; + } + + return EFI_SUCCESS; +} + +/** + Initialize the Timer Architectural Protocol driver + + @param ImageHandle ImageHandle of the loaded driver + @param SystemTable Pointer to the System Table + + @retval EFI_SUCCESS Timer Architectural Protocol created + @retval EFI_OUT_OF_RESOURCES Not enough resources available to initialize driver. + @retval EFI_DEVICE_ERROR A device error occurred attempting to initialize the driver. + +**/ +EFI_STATUS +EFIAPI +TimerDriverInitialize ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + + // + // Initialize the pointer to our notify function. + // + mTimerNotifyFunction = NULL; + + // + // Make sure the Timer Architectural Protocol is not already installed in the system + // + ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiTimerArchProtocolGuid); + + // + // Find the CPU architectural protocol. + // + Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **) &mCpu); + ASSERT_EFI_ERROR (Status); + + // + // Force the timer to be disabled + // + Status = TimerDriverSetTimerPeriod (&mTimer, 0); + ASSERT_EFI_ERROR (Status); + + // + // Install interrupt handler for Local APIC Timer + // + Status = mCpu->RegisterInterruptHandler (mCpu, LOCAL_APIC_TIMER_VECTOR, + TimerInterruptHandler); + ASSERT_EFI_ERROR (Status); + + // + // Force the timer to be enabled at its default period + // + Status = TimerDriverSetTimerPeriod (&mTimer, DEFAULT_TIMER_TICK_DURATION); + ASSERT_EFI_ERROR (Status); + + // + // Install the Timer Architectural Protocol onto a new handle + // + Status = gBS->InstallMultipleProtocolInterfaces ( + &mTimerHandle, + &gEfiTimerArchProtocolGuid, &mTimer, + NULL + ); + ASSERT_EFI_ERROR (Status); + + return Status; +} + diff --git a/Maintainers.txt b/Maintainers.txt index f51731a6b6..78e9f889ab 100644 --- a/Maintainers.txt +++ b/Maintainers.txt @@ -385,6 +385,7 @@ F: OvmfPkg/XenIoPciDxe/ F: OvmfPkg/XenPlatformPei/ F: OvmfPkg/XenPvBlkDxe/ F: OvmfPkg/XenResetVector/ +F: OvmfPkg/XenTimerDxe/ R: Anthony Perard <anthony.perard@xxxxxxxxxx> R: Julien Grall <julien.grall@xxxxxxx> -- Anthony PERARD _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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