KVM: arm64: Handle FEAT_IDST for sysregs without specific handlers

Browse source

Add a bit of infrastrtcture to triage_sysreg_trap() to handle the
case of registers falling into the Feature ID space that do not
have a local handler.

For these, we can directly apply the FEAT_IDST semantics and inject
an EC=0x18 exception. Otherwise, an UNDEF will do.

Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Reviewed-by: Yuan Yao <yaoyuan@linux.alibaba.com>
Link: https://patch.msgid.link/20260108173233.2911955-5-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

...

This commit is contained in:

Marc Zyngier 2026-01-08 17:32:28 +00:00

parent 19f7567823

commit d78a14decd

2 changed files with 23 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

13

arch/arm64/kvm/emulate-nested.c

View file

10

arch/arm64/kvm/sys_regs.h

View file