From mboxrd@z Thu Jan 1 00:00:00 1970 From: marc.zyngier@arm.com (Marc Zyngier) Date: Wed, 3 May 2017 11:45:58 +0100 Subject: [PATCH 23/31] KVM: arm64: Enable GICv3 Group-0 sysreg trapping via command-line In-Reply-To: <20170503104606.19342-1-marc.zyngier@arm.com> References: <20170503104606.19342-1-marc.zyngier@arm.com> Message-ID: <20170503104606.19342-24-marc.zyngier@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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). Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-v3.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c index 812f179a6931..7c82c586d44a 100644 --- a/virt/kvm/arm/vgic/vgic-v3.c +++ b/virt/kvm/arm/vgic/vgic-v3.c @@ -327,6 +327,12 @@ int vgic_v3_map_resources(struct kvm *kvm) DEFINE_STATIC_KEY_FALSE(vgic_v3_cpuif_trap); +static int __init early_group0_trap_cfg(char *buf) +{ + return strtobool(buf, &group0_trap); +} +early_param("vgic_v3.group0_trap", early_group0_trap_cfg); + static int __init early_group1_trap_cfg(char *buf) { return strtobool(buf, &group1_trap); -- 2.11.0