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authorChristoffer Dall <c.dall@virtualopensystems.com>2013-01-20 18:28:09 -0500
committerChristoffer Dall <c.dall@virtualopensystems.com>2013-01-23 13:29:13 -0500
commit5b3e5e5bf230f56309706dfc05fc0cb173cc83aa (patch)
treeda2ed7c2553526469c802c2a7903b1595b8be3ce /arch/arm/include/asm/kvm_host.h
parentf7ed45be3ba524e06a6d933f0517dc7ad2d06703 (diff)
downloadblackbird-op-linux-5b3e5e5bf230f56309706dfc05fc0cb173cc83aa.tar.gz
blackbird-op-linux-5b3e5e5bf230f56309706dfc05fc0cb173cc83aa.zip
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.h4
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 */
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