Merge tag 'for-master' of https://github.com/rhdrjones/kvm-unit-tests into HEAD

arm/arm64 patches ready for master

arm: rename cp15.h to sysreg.h

To prepare for future support of ARMv8 system register, rename cp15.h file
to sysreg.h, with _ASMARM_CP15_H_ renamed to _ASMARM_SYSREG_H_ in header
file.

Signed-off-b

arm: rename cp15.h to sysreg.h

To prepare for future support of ARMv8 system register, rename cp15.h file
to sysreg.h, with _ASMARM_CP15_H_ renamed to _ASMARM_SYSREG_H_ in header
file.

Signed-off-by: Wei Huang <wei@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>

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arm/arm64: Introduce mmu_disable

Allow unit test cpus to disable the MMU. Why not? We want the
test framework to be as flexible as possible. Callers will have
to deal with the cache coherency fallou

arm/arm64: Introduce mmu_disable

Allow unit test cpus to disable the MMU. Why not? We want the
test framework to be as flexible as possible. Callers will have
to deal with the cache coherency fallout... Cache flush support
is still forthcoming to the framework though.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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arm/arm64: add smp_boot_secondary

Add a common entry point, present/online cpu masks, and
smp_boot_secondary() to support booting secondary cpus.
Adds a bit more PSCI API that we need too. We also
a

arm/arm64: add smp_boot_secondary

Add a common entry point, present/online cpu masks, and
smp_boot_secondary() to support booting secondary cpus.
Adds a bit more PSCI API that we need too. We also
adjust THREAD_START_SP for arm to make some room for
exception stacks.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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arm: clarify comment about exception stack use

Each mode has its own stack, but we only use it as a base pointer
to a private memory region. That region, which has a size of
sizeof(struct pt_regs),

arm: clarify comment about exception stack use

Each mode has its own stack, but we only use it as a base pointer
to a private memory region. That region, which has a size of
sizeof(struct pt_regs), is used to store some registers during the
switch to svc mode - which will use the normal svc stack. The switch
to svc mode is done because we handle all exceptions in svc.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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arm/arm64: introduce thread_info

For smp we need a way to maintain thread local state. The bottom
of the thread stack is a good place, and is where Linux puts it.
So we just steal the concept of the

arm/arm64: introduce thread_info

For smp we need a way to maintain thread local state. The bottom
of the thread stack is a good place, and is where Linux puts it.
So we just steal the concept of the thread_info structure that
lives at the bottom of the stack in Linux, and introduce it to
kvm-unit-tests/arm[64]. For starters we just have cpu index for
state, and that's implicitly initialized to zero for CPU0 already.
So, as we don't have secondary cpus yet, there's not much to do.

Additionally, sneak a small fixup in to the initial stack setup
for arm64. We were assuming that spsel is EL1 after reset, which
has been true so far, but let's not assume.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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arm: fixups: add barriers, actually set MAIR

Sprinkle in some more isbs after context-changing operations,
as the ARM ARM states we should. I haven't seen any problems
without them, but we should do

arm: fixups: add barriers, actually set MAIR

Sprinkle in some more isbs after context-changing operations,
as the ARM ARM states we should. I haven't seen any problems
without them, but we should do it right. Also, *actually* set
the MAIR in asm_mmu_enable. We were reading, not writing...
Luckily this was just spotted while adding the isbs, rather
than leading to a nightmare debug session some day...

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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arm: use absolute headers

Files in lib/arm including "asm/someheader.h" will get
lib/arm/asm/someheader.h, not lib/asm/someheader.h. So we
need to use <> instead of "" in order to prepare for header

arm: use absolute headers

Files in lib/arm including "asm/someheader.h" will get
lib/arm/asm/someheader.h, not lib/asm/someheader.h. So we
need to use <> instead of "" in order to prepare for headers
of the same name, but for a different arch. We change all
'#include's of all arm files, as consistency looks better.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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arm: setup: drop unused arguments

Drop the unused arguments from setup(), passing only the fdt.
This allows setup() to be more easily shared with arm64.

Signed-off-by: Andrew Jones <drjones@redhat.

arm: setup: drop unused arguments

Drop the unused arguments from setup(), passing only the fdt.
This allows setup() to be more easily shared with arm64.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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arm: turn on the MMU

We should probably always run with the mmu on, so let's
enable it from setup with an identity map.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini

arm: turn on the MMU

We should probably always run with the mmu on, so let's
enable it from setup with an identity map.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Merge remote-tracking branch 'drjones/arm/v7-initial-drop'

arm: vectors support

Add support for tests to use exception handlers using
install_exception_handler(). This patch also adds start_usr(),
which can be used to start a function in USR mode, using a g

arm: vectors support

Add support for tests to use exception handlers using
install_exception_handler(). This patch also adds start_usr(),
which can be used to start a function in USR mode, using a given
stack pointer. start_usr() is used by a new selftest test that
checks the new vector support.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
---
v7:
- selftest.c: s/alloc_aligned/memalign/
- lib/arm/processor.c remove unnecessary include "asm/setup.h"
v6: use alloc() for start_usr
v5: rebase change: replace __stringify with libcflat's new xstr
macro
v4: a couple tweaks to fit changes in the other patches,
vectors-usr test now has an 8K usr stack
v3:
- squashed in 'arm: Simplify exceptions_init in cstart.S'
[Christoffer Dall]
- suggested function name changes and comment additions
[Christoffer Dall]
- fix a bug with stack restore from usr mode exceptions that
Christoffer pointed out. Add a get_sp() accessor too.

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arm: initial drop

This is the initial drop of the arm test framework and a first test
that just checks that setup completed (a selftest). kvm isn't needed
to run this test unless testing with smp >

arm: initial drop

This is the initial drop of the arm test framework and a first test
that just checks that setup completed (a selftest). kvm isn't needed
to run this test unless testing with smp > 1.

Try it out with
yum install gcc-arm-linux-gnu
export QEMU=[qemu with mach-virt and chr-testdev]
./configure --cross-prefix=arm-linux-gnu- --arch=arm
make
./run_tests.sh

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
---
v7:
- remove memregions (reworked them as phys_alloc in lib/alloc)
- selftest: non-functional change: s/argv[i]/var/
- lib/argv:setup_args don't dereference NULL
v6:
- fixed setup.c comment [Christoffer Dall]
- changed arm/run to use chr-testdev instead of virtio-testdev
- add align parameter to memregion_new, setup alloc_ops
v5:
- memregions: check freemem_start is in bounds and document
- selftest: rename testnam => testname and properly init it
- io.c: use writeb instead of writel in puts() and use ioremap
- arm/run script update for new qemu ('-device ?' now requires -machine)
- couple other minor changes to setup.c and io.c [Christoffer Dall]
v4:
- moved fdt to just after stacktop (it was in the middle of free memory)
- switched from using heap to memregions
- get nr_cpus and added smp=<num> test
- added barrier.h
- use new report()/report_summary()
- config/config-arm.mak cleanup

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