diff options
| author | Will Deacon <will@kernel.org> | 2024-10-22 16:40:15 +0200 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-10-24 01:21:45 +0200 |
| commit | ad361ed4771da6aebb3ca6184a81ae4b8ad9f0b6 (patch) | |
| tree | 9527d5fedf0419f31598971d434a76fd5141027b /arch/arm64/kvm/hyp | |
| parent | Linux 6.12-rc3 (diff) | |
| download | linux-ad361ed4771da6aebb3ca6184a81ae4b8ad9f0b6.tar.xz linux-ad361ed4771da6aebb3ca6184a81ae4b8ad9f0b6.zip | |
KVM: arm64: Just advertise SEIS as 0 when emulating ICC_CTLR_EL1
ICC_CTLR_EL1 accesses from a guest are trapped and emulated on systems
with broken SEIS support and without FEAT_GICv3_TDIR. On such systems,
we mask SEIS support in 'kvm_vgic_global_state.ich_vtr_el2' and so the
value of ICC_CTLR_EL1.SEIS visible to the guest is always zero.
Simplify the ICC_CTLR_EL1 read emulation to return 0 for the SEIS field,
rather than reading an always-zero value from the global state.
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241022144016.27350-2-will@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/kvm/hyp')
| -rw-r--r-- | arch/arm64/kvm/hyp/vgic-v3-sr.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c index 18d4677002b1..3f9741e51d41 100644 --- a/arch/arm64/kvm/hyp/vgic-v3-sr.c +++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c @@ -1012,9 +1012,6 @@ static void __vgic_v3_read_ctlr(struct kvm_vcpu *vcpu, u32 vmcr, int rt) val = ((vtr >> 29) & 7) << ICC_CTLR_EL1_PRI_BITS_SHIFT; /* IDbits */ val |= ((vtr >> 23) & 7) << ICC_CTLR_EL1_ID_BITS_SHIFT; - /* SEIS */ - if (kvm_vgic_global_state.ich_vtr_el2 & ICH_VTR_SEIS_MASK) - val |= BIT(ICC_CTLR_EL1_SEIS_SHIFT); /* A3V */ val |= ((vtr >> 21) & 1) << ICC_CTLR_EL1_A3V_SHIFT; /* EOImode */ |