[PATCH v6 33/64] KVM: arm64: nv: Hide RAS from nested guests

Marc Zyngier
2022-01-28T12:51:11Z

We don't want to expose complicated features to guests until we have
a good grasp on the basic CPU emulation. So let's pretend that RAS,
doesn't exist in a nested guest. We already hide the feature bits,
let's now make sure VDISR_EL1 will UNDEF.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/sys_regs.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index ebcdf2714b73..5e8876177ce6 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2212,6 +2212,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
EL2_REG(VBAR_EL2, access_rw, reset_val, 0),
EL2_REG(RVBAR_EL2, access_rw, reset_val, 0),
{ SYS_DESC(SYS_RMR_EL2), trap_undef },
+ { SYS_DESC(SYS_VDISR_EL2), trap_undef },

EL2_REG(CONTEXTIDR_EL2, access_rw, reset_val, 0),
EL2_REG(TPIDR_EL2, access_rw, reset_val, 0),