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| author |   Andre Przywara <andre.przywara@arm.com> | 2014-06-03 08:58:15 +0200 |
|---|---|---|
| committer |   Christoffer Dall <christoffer.dall@linaro.org> | 2015-01-20 18:25:28 +0100 |
| commit | 2f5fa41a7a7f47f3109a6596b0ec96258dbf06e6 (patch) | |
| tree | 6e75ee4272712add84e6d0a1f547caaacc38a7d3 /include/kvm | |
| parent | arm/arm64: KVM: make the maximum number of vCPUs a per-VM value (diff) | |
| download | linux-dev-2f5fa41a7a7f47f3109a6596b0ec96258dbf06e6.tar.xz linux-dev-2f5fa41a7a7f47f3109a6596b0ec96258dbf06e6.zip | |
arm/arm64: KVM: make the value of ICC_SRE_EL1 a per-VM variable
ICC_SRE_EL1 is a system register allowing msr/mrs accesses to the
GIC CPU interface for EL1 (guests). Currently we force it to 0, but
for proper GICv3 support we have to allow guests to use it (depending
on their selected virtual GIC model).
So add ICC_SRE_EL1 to the list of saved/restored registers on a
world switch, but actually disallow a guest to change it by only
restoring a fixed, once-initialized value.
This value depends on the GIC model userland has chosen for a guest.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'include/kvm')
| -rw-r--r-- | include/kvm/arm_vgic.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 1c0e9dbabe6d..ff04afd0d901 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -245,6 +245,7 @@ struct vgic_v3_cpu_if { #ifdef CONFIG_ARM_GIC_V3 u32 vgic_hcr; u32 vgic_vmcr; + u32 vgic_sre; /* Restored only, change ignored */ u32 vgic_misr; /* Saved only */ u32 vgic_eisr; /* Saved only */ u32 vgic_elrsr; /* Saved only */ |