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linux/tools/testing/selftests/kvm/lib/aarch64
Oliver Upton e8b9a055fa KVM: arm64: selftests: Align VA space allocator with TTBR0
An interesting feature of the Arm architecture is that the stage-1 MMU
supports two distinct VA regions, controlled by TTBR{0,1}_EL1. As KVM
selftests on arm64 only uses TTBR0_EL1, the VA space is constrained to
[0, 2^(va_bits-1)). This is different from other architectures that
allow for addressing low and high regions of the VA space from a single
page table.

KVM selftests' VA space allocator presumes the valid address range is
split between low and high memory based the MSB, which of course is a
poor match for arm64's TTBR0 region.

Allow architectures to override the default VA space layout. Make use of
the override to align vpages_valid with the behavior of TTBR0 on arm64.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Message-Id: <20221207214809.489070-4-oliver.upton@linux.dev>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-12-09 09:13:35 +01:00
..
gic.c
gic_private.h
gic_v3.c
handlers.S
processor.c KVM: arm64: selftests: Align VA space allocator with TTBR0 2022-12-09 09:13:35 +01:00
spinlock.c
ucall.c KVM: selftests: Add ucall pool based implementation 2022-11-16 16:58:53 -08:00
vgic.c