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| author | James Morse <james.morse@arm.com> | 2024-10-30 19:03:17 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-10-31 21:10:52 +0300 |
| commit | 75cd027cbcb161e277209e20df14f0818c62d9e7 (patch) | |
| tree | 0417ebbe9d31df706fd1b794f9e49051fa447518 /rust/helpers/helpers.c | |
| parent | 6685f5d572c22e1003e7c0d089afe1c64340ab1f (diff) | |
| download | linux-75cd027cbcb161e277209e20df14f0818c62d9e7.tar.xz | |
KVM: arm64: selftests: Test ID_AA64PFR0.MPAM isn't completely ignored
The ID_AA64PFR0.MPAM bit was previously accidentally exposed to guests,
and is ignored by KVM. KVM will always present the guest with 0 here,
and trap the MPAM system registers to inject an undef.
But, this value is still needed to prevent migration when the value
is incompatible with the target hardware. Add a kvm unit test to try
and write multiple values to ID_AA64PFR0.MPAM. Only the hardware value
previously exposed should be ignored, all other values should be
rejected.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241030160317.2528209-8-joey.gouly@arm.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'rust/helpers/helpers.c')
0 files changed, 0 insertions, 0 deletions