[PATCH 0/3] KVM/arm64 fixes for AArch32 handling
Marc Zyngier
maz at kernel.org
Fri May 24 07:19:53 PDT 2024
The (very much unloved) AArch32 handling has recently been found
lacking in a number of ways:
- Nina spotted a brown paper-bag quality bug in the register narrowing
code when writing one of the core registers (GPRs, PSTATE) from
userspace
- We never allowed System mode to be restored. Nobody ever complained,
but this is wrong nonetheless
- The handling of traps failing their condition check went from dodgy
to outright broken when the handling of ESR_EL2 was upgraded from 32
to 64 bit (patch already posted).
All these are stable material, and I plan to merge them after -rc1
is released.
M.
Marc Zyngier (3):
KVM: arm64: Fix AArch32 register narrowing on userspace write
KVM: arm64: Allow AArch32 PSTATE.M to be restored as System mode
KVM: arm64: AArch32: Fix spurious trapping of conditional instructions
arch/arm64/kvm/guest.c | 3 ++-
arch/arm64/kvm/hyp/aarch32.c | 18 ++++++++++++++++--
2 files changed, 18 insertions(+), 3 deletions(-)
--
2.39.2
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