linux/Documentation/virtual/kvm
Christoffer Dall 1138245ccf KVM: ARM: User space API for getting/setting co-proc registers
The following three ioctls are implemented:
 -  KVM_GET_REG_LIST
 -  KVM_GET_ONE_REG
 -  KVM_SET_ONE_REG

Now we have a table for all the cp15 registers, we can drive a generic
API.

The register IDs carry the following encoding:

ARM registers are mapped using the lower 32 bits.  The upper 16 of that
is the register group type, or coprocessor number:

ARM 32-bit CP15 registers have the following id bit patterns:
  0x4002 0000 000F <zero:1> <crn:4> <crm:4> <opc1:4> <opc2:3>

ARM 64-bit CP15 registers have the following id bit patterns:
  0x4003 0000 000F <zero:1> <zero:4> <crm:4> <opc1:4> <zero:3>

For futureproofing, we need to tell QEMU about the CP15 registers the
host lets the guest access.

It will need this information to restore a current guest on a future
CPU or perhaps a future KVM which allow some of these to be changed.

We use a separate table for these, as they're only for the userspace API.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23 13:29:14 -05:00
..
api.txt KVM: ARM: User space API for getting/setting co-proc registers 2013-01-23 13:29:14 -05:00
cpuid.txt KVM: fix cpuid eax for KVM leaf 2012-05-06 15:51:56 +03:00
hypercalls.txt KVM: Add documentation on hypercalls 2012-08-13 17:39:59 -03:00
locking.txt KVM: MMU: document mmu-lock and fast page fault 2012-07-11 16:51:23 +03:00
mmu.txt Documentation: Fix multiple typo in Documentation 2012-03-07 16:08:24 +01:00
msr.txt KVM: clarify kvmclock documentation 2012-09-17 14:10:23 -03:00
nested-vmx.txt KVM: nVMX: Documentation 2011-07-12 13:15:22 +03:00
ppc-pv.txt KVM: Add ppc hypercall documentation 2012-08-13 17:39:59 -03:00
review-checklist.txt Correct occurrences of 2011-05-06 09:27:55 -07:00
timekeeping.txt