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| author | Oliver Upton <[email protected]> | 2022-12-07 21:48:07 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2022-12-09 08:13:35 +0000 |
| commit | e8b9a055fa0481679132781db574ecb771960f16 (patch) | |
| tree | c27dabafacc1cd6966c6626e9ddabf4deb026442 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | Merge tag 'kvmarm-6.2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvm... (diff) | |
| download | kernel-e8b9a055fa0481679132781db574ecb771960f16.tar.gz kernel-e8b9a055fa0481679132781db574ecb771960f16.zip | |
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 <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions