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| author | Marc Zyngier <marc.zyngier@arm.com> | 2014-07-08 13:09:04 +0200 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2014-09-19 03:48:57 +0200 |
| commit | c3c918361adcceb816c92b21dd95d2b46fb96a8f (patch) | |
| tree | 055024f1f93ec5fce6851aac87f9f22bb79a0a4d /include/kvm | |
| parent | arm/arm64: KVM: vgic: kill VGIC_MAX_CPUS (diff) | |
| download | linux-c3c918361adcceb816c92b21dd95d2b46fb96a8f.tar.xz linux-c3c918361adcceb816c92b21dd95d2b46fb96a8f.zip | |
arm/arm64: KVM: vgic: handle out-of-range MMIO accesses
Now that we can (almost) dynamically size the number of interrupts,
we're facing an interesting issue:
We have to evaluate at runtime whether or not an access hits a valid
register, based on the sizing of this particular instance of the
distributor. Furthermore, the GIC spec says that accessing a reserved
register is RAZ/WI.
For this, add a new field to our range structure, indicating the number
of bits a single interrupts uses. That allows us to find out whether or
not the access is in range.
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'include/kvm')
| -rw-r--r-- | include/kvm/arm_vgic.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 3b73d7845124..2767f939f47c 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -32,6 +32,7 @@ #define VGIC_V2_MAX_LRS (1 << 6) #define VGIC_V3_MAX_LRS 16 +#define VGIC_MAX_IRQS 1024 /* Sanity checks... */ #if (KVM_MAX_VCPUS > 8) @@ -42,7 +43,7 @@ #error "VGIC_NR_IRQS must be a multiple of 32" #endif -#if (VGIC_NR_IRQS > 1024) +#if (VGIC_NR_IRQS > VGIC_MAX_IRQS) #error "VGIC_NR_IRQS must be <= 1024" #endif |