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| author | Marc Zyngier <maz@kernel.org> | 2024-02-14 13:18:18 +0000 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-02-19 17:13:01 +0000 |
| commit | 2fd8f31c32f061822c18d13d17c1ea6a531cc443 (patch) | |
| tree | 654328fdcf1c9cfe40cc945b7b5fb8faa36697e7 /arch/arm64/kvm/emulate-nested.c | |
| parent | 085eabaa74a12345b7dd083b160519fe3a52f2ce (diff) | |
| download | linux-stable-2fd8f31c32f061822c18d13d17c1ea6a531cc443.tar.gz linux-stable-2fd8f31c32f061822c18d13d17c1ea6a531cc443.tar.bz2 linux-stable-2fd8f31c32f061822c18d13d17c1ea6a531cc443.zip | |
KVM: arm64: Add Fine-Grained UNDEF tracking information
In order to efficiently handle system register access being disabled,
and this resulting in an UNDEF exception being injected, we introduce
the (slightly dubious) concept of Fine-Grained UNDEF, modeled after
the architectural Fine-Grained Traps.
For each FGT group, we keep a 64 bit word that has the exact same
bit assignment as the corresponding FGT register, where a 1 indicates
that trapping this register should result in an UNDEF exception being
reinjected.
So far, nothing populates this information, nor sets the corresponding
trap bits.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240214131827.2856277-18-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/kvm/emulate-nested.c')
| -rw-r--r-- | arch/arm64/kvm/emulate-nested.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index 4f2a32a8f247..b67078b8271b 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -1009,18 +1009,6 @@ static const struct encoding_to_trap_config encoding_to_cgt[] __initconst = { static DEFINE_XARRAY(sr_forward_xa); -enum fgt_group_id { - __NO_FGT_GROUP__, - HFGxTR_GROUP, - HDFGRTR_GROUP, - HDFGWTR_GROUP = HDFGRTR_GROUP, - HFGITR_GROUP, - HAFGRTR_GROUP, - - /* Must be last */ - __NR_FGT_GROUP_IDS__ -}; - enum fg_filter_id { __NO_FGF__, HCRX_FGTnXS, |