diff options
| author | Marc Zyngier | 2017-06-09 12:49:46 +0100 |
|---|---|---|
| committer | Marc Zyngier | 2017-06-15 09:45:03 +0100 |
| commit | e23f62f76acea232d4def5d4eb21709a2b575f14 (patch) | |
| tree | 76bca23a065ddc730b24602a09c6ec69da6e8918 | |
| parent | abf55766f7b062234083ff612446ff8d47e2417e (diff) | |
KVM: arm64: Enable GICv3 Group-0 sysreg trapping via command-line
Now that we're able to safely handle Group-0 sysreg access, let's
give the user the opportunity to enable it by passing a specific
command-line option (vgic_v3.group0_trap).
Tested-by: Alexander Graf <agraf@suse.de>
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 4 | ||||
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-v3.c | 6 |
2 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 42fe395be6c8..88bdc421351f 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1829,6 +1829,10 @@ for all guests. Default is 1 (enabled) if in 64-bit or 32-bit PAE mode. + kvm-arm.vgic_v3_group0_trap= + [KVM,ARM] Trap guest accesses to GICv3 group-0 + system registers + kvm-arm.vgic_v3_group1_trap= [KVM,ARM] Trap guest accesses to GICv3 group-1 system registers diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c index 39046ee5be25..828ca7f9a060 100644 --- a/virt/kvm/arm/vgic/vgic-v3.c +++ b/virt/kvm/arm/vgic/vgic-v3.c @@ -438,6 +438,12 @@ out: DEFINE_STATIC_KEY_FALSE(vgic_v3_cpuif_trap); +static int __init early_group0_trap_cfg(char *buf) +{ + return strtobool(buf, &group0_trap); +} +early_param("kvm-arm.vgic_v3_group0_trap", early_group0_trap_cfg); + static int __init early_group1_trap_cfg(char *buf) { return strtobool(buf, &group1_trap); |