Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2190
Patch series available in this git branch:
https://xenbits.xen.org/git-http/people/aperard/ovmf.git br.xenbusdxe-fix-exitbootservices-v1
Hi,
This patch series works toward removing usage of Memory Allocation Services in
XenBusDxe when ExitBootServices() is called by the next operating system.
Since that in order to reset a backend, communication needs to happened via
xenstore, this series focus mostly on getting rid of allocation in the xenstore
driver. There are still some left but that's in function that aren't needed after
EBS is called.
In some places (like XenStoreVSPrint), instead of allocating a buffer, the
buffer (4k) is on the stack.
Thanks,
Anthony PERARD (11):
OvmfPkg/XenBusDxe: Fix missing \n in DEBUG messages
OvmfPkg/XenBusDxe: Have XenStoreFindWatch take a pointer
OvmfPkg/XenBusDxe: Rework watch events reception
OvmfPkg/XenBusDxe: Avoid Allocate in XenStoreVSPrint
OvmfPkg/XenBusDxe: Construct paths without allocation
OvmfPkg/XenBusDxe: Rework XenStoreProcessMessage to avoid allocating
memory
OvmfPkg/XenBusDxe: Use on stack buffer in internal functions
OvmfPkg/XenBus: Change XENBUS_PROTOCOL to not return allocated memory
OvmfPkg/XenBusDxe: Fix NotifyExitBoot to avoid Memory Allocation
Services
OvmfPkg/XenPvBlkDxe: Use XenBusIo->RegisterExitCallback
OvmfPkg/XenBusDxe: Fix XenStoreWaitForEvent use during EBS
OvmfPkg/Include/Protocol/XenBus.h | 67 +++-
OvmfPkg/XenBusDxe/EventChannel.c | 3 +-
OvmfPkg/XenBusDxe/XenBus.c | 58 ++-
OvmfPkg/XenBusDxe/XenBusDxe.c | 29 +-
OvmfPkg/XenBusDxe/XenBusDxe.h | 3 +
OvmfPkg/XenBusDxe/XenStore.c | 577 +++++++++++++-----------------
OvmfPkg/XenBusDxe/XenStore.h | 44 ++-
OvmfPkg/XenPvBlkDxe/BlockFront.c | 82 +++--
OvmfPkg/XenPvBlkDxe/BlockFront.h | 12 +-
OvmfPkg/XenPvBlkDxe/XenPvBlkDxe.c | 4 +-
10 files changed, 483 insertions(+), 396 deletions(-)
--
Anthony PERARD
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