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Commit e23f62f7 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

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: default avatarAlexander Graf <agraf@suse.de>
Acked-by: default avatarDavid Daney <david.daney@cavium.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarChristoffer Dall <cdall@linaro.org>
parent abf55766

Documentation/admin-guide/kernel-parameters.txt

+4 −0
Original line number Diff line number Diff line
@@ -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

virt/kvm/arm/vgic/vgic-v3.c

+6 −0
Original line number Diff line number Diff line
@@ -438,6 +438,12 @@ 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("kvm-arm.vgic_v3_group0_trap", early_group0_trap_cfg);



static int __init early_group1_trap_cfg(char *buf)

{

	return strtobool(buf, &group1_trap);