On Tue, 2 Oct 2012 10:24:13 +0100, Will Deacon <will.deacon@xxxxxxx>
wrote:
> On Mon, Oct 01, 2012 at 10:14:26AM +0100, Christoffer Dall wrote:
>> From: Marc Zyngier <marc.zyngier@xxxxxxx>
>>
>> Add the init code for the hypervisor, the virtual machine, and
>> the virtual CPUs.
>>
>> An interrupt handler is also wired to allow the VGIC maintenance
>> interrupts, used to deal with level triggered interrupts and LR
>> underflows.
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
>> Signed-off-by: Christoffer Dall <c.dall@xxxxxxxxxxxxxxxxxxxxxx>
>> ---
>
> [...]
>
>> diff --git a/arch/arm/kvm/vgic.c b/arch/arm/kvm/vgic.c
>> index b52d4c2..fc2a138 100644
>> --- a/arch/arm/kvm/vgic.c
>> +++ b/arch/arm/kvm/vgic.c
>> @@ -20,7 +20,14 @@
>> #include <linux/kvm_host.h>
>> #include <linux/interrupt.h>
>> #include <linux/io.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/of_irq.h>
>> +
>> #include <asm/kvm_emulate.h>
>> +#include <asm/hardware/gic.h>
>> +#include <asm/kvm_arm.h>
>> +#include <asm/kvm_mmu.h>
>>
>> /*
>> * How the whole thing works (courtesy of Christoffer Dall):
>> @@ -61,6 +68,13 @@
>> /* Temporary hacks, need to be provided by userspace emulation */
>> #define VGIC_DIST_BASE 0x2c001000
>> #define VGIC_DIST_SIZE 0x1000
>> +#define VGIC_CPU_BASE 0x2c002000
>> +#define VGIC_CPU_SIZE 0x2000
>
> We really don't want the physical memory map for the guest hardwired in
the
> kernel. Please find a way to parameterise this from userspace.
Yes, this is a known problem. KVM doesn't offer a standard way of passing
the address of an interrupt controller (none of the other architectures
have it memory mapped).
We probably need a separate ioctl for that...
M.
--
Fast, cheap, reliable. Pick two.
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