diff options
| author | Christoffer Dall <c.dall@virtualopensystems.com> | 2013-01-20 18:28:09 -0500 |
|---|---|---|
| committer | Christoffer Dall <c.dall@virtualopensystems.com> | 2013-01-23 13:29:13 -0500 |
| commit | 5b3e5e5bf230f56309706dfc05fc0cb173cc83aa (patch) | |
| tree | da2ed7c2553526469c802c2a7903b1595b8be3ce /arch/arm/include/asm/kvm_host.h | |
| parent | f7ed45be3ba524e06a6d933f0517dc7ad2d06703 (diff) | |
KVM: ARM: Emulation framework and CP15 emulation
Adds a new important function in the main KVM/ARM code called
handle_exit() which is called from kvm_arch_vcpu_ioctl_run() on returns
from guest execution. This function examines the Hyp-Syndrome-Register
(HSR), which contains information telling KVM what caused the exit from
the guest.
Some of the reasons for an exit are CP15 accesses, which are
not allowed from the guest and this commit handles these exits by
emulating the intended operation in software and skipping the guest
instruction.
Minor notes about the coproc register reset:
1) We reserve a value of 0 as an invalid cp15 offset, to catch bugs in our
table, at cost of 4 bytes per vcpu.
2) Added comments on the table indicating how we handle each register, for
simplicity of understanding.
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>
Diffstat (limited to 'arch/arm/include/asm/kvm_host.h')
| -rw-r--r-- | arch/arm/include/asm/kvm_host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 7a121089c733..e1d4168d4f19 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -94,6 +94,10 @@ struct kvm_vcpu_arch { * Anything that is not used directly from assembly code goes * here. */ + /* dcache set/way operation pending */ + int last_pcpu; + cpumask_t require_dcache_flush; + /* Interrupt related fields */ u32 irq_lines; /* IRQ and FIQ levels */ |