search for: handle_noop

...nding data in struct kvm_run in case kvm_handle_sie_intercept() returns -ENOTSUPP. In case of partial execution in kernel with the need of userspace support, kvm_handle_sie_intercept() may choose to set up struct kvm_run and return -EREMOTE. The trivial intercept reasons are handled in this patch: handle_noop() just does nothing for intercepts that don't require our support at all handle_stop() is called when a cpu enters stopped state, and it drops out to userland after updating our vcpu state handle_validity() faults in the cpu lowcore if needed, or passes the request to userland Acked-by:...

...nding data in struct kvm_run in case kvm_handle_sie_intercept() returns -ENOTSUPP. In case of partial execution in kernel with the need of userspace support, kvm_handle_sie_intercept() may choose to set up struct kvm_run and return -EREMOTE. The trivial intercept reasons are handled in this patch: handle_noop() just does nothing for intercepts that don't require our support at all handle_stop() is called when a cpu enters stopped state, and it drops out to userland after updating our vcpu state handle_validity() faults in the cpu lowcore if needed, or passes the request to userland Acked-by:...

...cpu->arch.sie_block->gcr[reg] |= val; + useraddr += 4; + if (reg == reg3) + break; + reg = reg + 1; + if (reg > 15) + reg = 0; + } while (1); + return 0; +} + +static intercept_handler_t instruction_handlers[256] = { + [0xb7] = handle_lctl, + [0xeb] = handle_lctg, +}; static int handle_noop(struct kvm_vcpu *vcpu) { @@ -57,10 +142,48 @@ static int handle_validity(struct kvm_vc return -ENOTSUPP; } +static int handle_instruction(struct kvm_vcpu *vcpu) +{ + intercept_handler_t handler = + instruction_handlers[vcpu->arch.sie_block->ipa >> 8]; + + vcpu->stat.exit_instr...

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

...vm/arch/s390/kvm/intercept.c @@ -100,6 +100,7 @@ static int handle_lctl(struct kvm_vcpu * } static intercept_handler_t instruction_handlers[256] = { + [0xae] = kvm_s390_handle_sigp, [0xb2] = kvm_s390_handle_priv, [0xb7] = handle_lctl, [0xeb] = handle_lctg, @@ -122,10 +123,27 @@ static int handle_noop(struct kvm_vcpu * static int handle_stop(struct kvm_vcpu *vcpu) { + int rc; + vcpu->stat.exit_stop_request++; - VCPU_EVENT(vcpu, 3, "%s", "cpu stopped"); atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); - return -ENOTSUPP; + spin_lock_bh(...