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| author |   Oliver Upton <oliver.upton@linux.dev> | 2023-10-03 23:04:05 +0000 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-10-04 17:11:50 +0000 |
| commit | f89fbb350dd76d6b5f080954309b9dec5ad220ac (patch) | |
| tree | 205124ab6cd474bd75687a3a20fbb8c7f1bad6ee | |
| parent | KVM: arm64: Allow userspace to change ID_AA64PFR0_EL1 (diff) | |
| download | wireguard-linux-f89fbb350dd76d6b5f080954309b9dec5ad220ac.tar.xz wireguard-linux-f89fbb350dd76d6b5f080954309b9dec5ad220ac.zip | |
KVM: arm64: Allow userspace to change ID_AA64ZFR0_EL1
All known fields in ID_AA64ZFR0_EL1 describe the unprivileged
instructions supported by the PE's SVE implementation. Allow userspace
to pick and choose the advertised feature set, though nothing stops the
guest from using undisclosed instructions.
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20231003230408.3405722-10-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index dbf915f88b17..57c8190d5438 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2067,7 +2067,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { ID_SANITISED(ID_AA64PFR1_EL1), ID_UNALLOCATED(4,2), ID_UNALLOCATED(4,3), - ID_SANITISED(ID_AA64ZFR0_EL1), + ID_WRITABLE(ID_AA64ZFR0_EL1, ~ID_AA64ZFR0_EL1_RES0), ID_HIDDEN(ID_AA64SMFR0_EL1), ID_UNALLOCATED(4,6), ID_UNALLOCATED(4,7), |