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The code from the FAST_RFILL macro uses a local array as a
temporary buffer - which gets allocated in the stack frame
of the engine() function. Since engine() can be called
recursively, this can cause stack overflows. So let's
move the rfill code into a separate function to avoid
these problems.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
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Make sure to include make.rules from the Makefiles in the common
lib folder to get some more sane console output during the build
process.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
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When running a pseries guest in PR KVM on top of pHyp, sc 1 instructions
are handled directly by pHyp, so we don't get to see them.
That means we need to get inventive. Invent a new instruction that behaves
like sc 1, but really is a reserved instruction that traps. This instruction
can be used by KVM to emulate sc 1 behavior.
This patch adds the SLOF support for it. With this, SLOF detects whether
it's running on such a broken setup and if so patches itself to execute
the fake sc 1 instruction instead of the real one.
Furthermore, we also hook into "quiesce" which Linux calls when it boots.
This gives us the chance to also patch Linux when it boots up, so it uses
the fake sc 1 too.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
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Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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The virtio devices are preferred way of providing virtualized devices on
KVM/qemu. Here's now the basic support for virtio block devices.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
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Added a new board for SLOF running on KVM/qemu.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
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