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| author | Laszlo Ersek <lersek@redhat.com> | 2015-03-03 08:13:40 +0000 |
|---|---|---|
| committer | lersek <lersek@Edk2> | 2015-03-03 08:13:40 +0000 |
| commit | 48b3ff047929aa5bd4f94128c9a3ac04d6b3b31b (patch) | |
| tree | 0c9f56342687fd008565e919c3bac05a90b5b03b /OvmfPkg/Library/XenConsoleSerialPortLib | |
| parent | 02f69a25f0aa9f6dda38e2b72789136574928f93 (diff) | |
| download | edk2-48b3ff047929aa5bd4f94128c9a3ac04d6b3b31b.tar.gz edk2-48b3ff047929aa5bd4f94128c9a3ac04d6b3b31b.tar.bz2 edk2-48b3ff047929aa5bd4f94128c9a3ac04d6b3b31b.zip | |
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
Diffstat (limited to 'OvmfPkg/Library/XenConsoleSerialPortLib')
| -rw-r--r-- | OvmfPkg/Library/XenConsoleSerialPortLib/XenConsoleSerialPortLib.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/OvmfPkg/Library/XenConsoleSerialPortLib/XenConsoleSerialPortLib.c b/OvmfPkg/Library/XenConsoleSerialPortLib/XenConsoleSerialPortLib.c index 98022354cf..467cb27a30 100644 --- a/OvmfPkg/Library/XenConsoleSerialPortLib/XenConsoleSerialPortLib.c +++ b/OvmfPkg/Library/XenConsoleSerialPortLib/XenConsoleSerialPortLib.c @@ -40,6 +40,10 @@ SerialPortInitialize ( VOID
)
{
+ if (! XenHypercallIsAvailable ()) {
+ return RETURN_NOT_FOUND;
+ }
+
if (!mXenConsoleInterface) {
mXenConsoleEventChain.port = (UINT32)XenHypercallHvmGetParam (HVM_PARAM_CONSOLE_EVTCHN);
mXenConsoleInterface = (struct xencons_interface *)(UINTN)
|