[Xen-devel] [PATCH v4 0/2] xen: arm: introduce a function and flush dcache while preparing the device tree for Dom0

[Oleksandr Dmytryshyn <oleksandr.dmytryshyn@xxxxxxxxxxxxxxx>]

Changes from v3 to v4:
Added spaces inside the brackets for the if.

Changes from v2 to v3: raw_copy_to_guest_helper()
function now is static.

Currently we use OMAP5 ES2.0 Panda5 board to work with the hypervisor.

Without flushing dcache the hypervisor couldn't copy the device tree
correctly when booting the kernel dom0 Image (memory with device tree
is corrupted). As the result - when we try to load the kernel dom0
Image - dom0 hungs frequently. This issue is not reproduced with the
kernel dom0 zImage because the zImage decompressor code flushes all
dcache before starting the decompressed kernel Image. When the
hypervisor loads the kernel image or initrd, this memory region
isn't corrupted because the hypervisor code flushes the dcache.

Oleksandr Dmytryshyn (2):
  xen: arm: introduce raw_copy_to_guest_flush_dcache() function
  xen: arm: flush dcache while preparing the device tree for Dom0

 xen/arch/arm/domain_build.c        |  3 ++-
 xen/arch/arm/guestcopy.c           | 16 +++++++++++++++-
 xen/include/asm-arm/guest_access.h |  2 ++
 3 files changed, 19 insertions(+), 2 deletions(-)

-- 
1.8.2.rc2


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