audk/OvmfPkg/Library
Laszlo Ersek 48b3ff0479 OvmfPkg: replace strict XenHypercallLib construction with explicit query
XenHypercallLib has two clients at the moment: XenBusDxe and
XenConsoleSerialPortLib. Currently, when XenBusDxe starts on a non-Xen X86
platform (ie. as part of OVMF not running on Xen), the X86XenHypercallLib
instance built into it fails to initialize, which triggers an ASSERT() in
auto-generated code.

Instead, let's call XenHypercallIsAvailable() in the driver's entry point,
and exit cleanly when the driver is started on a non-Xen platform.

Modify the constructor of XenConsoleSerialPortLib similarly; we shouldn't
proceed if Xen is not available. In practice this check should never fail,
because XenConsoleSerialPortLib is only used on ARM, and
ArmXenHypercallLib is always available; but nonetheless we should be
pedantic.

Reported-by: Gabriel L. Somlo <gsomlo@gmail.com>
Suggested-by: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17001 6f19259b-4bc3-4df7-8a09-765794883524
2015-03-03 08:13:40 +00:00
..
AcpiTimerLib OvmfPkg: AcpiTimerLib: Switch additional stages to PCD-based Dxe instance 2014-11-14 00:38:53 +00:00
EmuVariableFvbLib
LoadLinuxLib
LockBoxLib
NvVarsFileLib
PlatformBdsLib OvmfPkg/PlatformBdsLib: Signal ReadyToBoot before booting QEMU kernel 2015-02-17 00:05:36 +00:00
PlatformDebugLibIoPort OvmfPkg: Update PlatformBaseDebugLibIoPort library 2015-02-06 06:38:37 +00:00
PlatformFvbLibNull
PlatformSecureLib
QemuBootOrderLib OvmfPkg: QemuBootOrderLib: expose QEMU's "-boot menu=on[,splash-time=N]" 2015-01-14 16:25:54 +00:00
QemuFwCfgLib OvmfPkg QemuFwCfgLib: Convert X64/IoLibExAsm.asm to NASM 2014-10-31 20:54:54 +00:00
ResetSystemLib
SerializeVariablesLib
VirtioLib
VirtioMmioDeviceLib
XenConsoleSerialPortLib OvmfPkg: replace strict XenHypercallLib construction with explicit query 2015-03-03 08:13:40 +00:00
XenHypercallLib OvmfPkg: replace strict XenHypercallLib construction with explicit query 2015-03-03 08:13:40 +00:00
XenIoMmioLib ArmVirtualizationPkg: add XenIoMmioLib 2015-02-28 20:34:16 +00:00