KVM: PPC: Fix emulated MMIO sign-extension
When the guest does a sign-extending load instruction (such as lha or lwa) to an emulated MMIO location, it results in a call to kvmppc_handle_loads() in the host. That function sets the vcpu->arch.mmio_sign_extend flag and calls kvmppc_handle_load() to do the rest of the work. However, kvmppc_handle_load() sets the mmio_sign_extend flag to 0 unconditionally, so the sign extension never gets done. To fix this, we rename kvmppc_handle_load to __kvmppc_handle_load and add an explicit parameter to indicate whether sign extension is required. kvmppc_handle_load() and kvmppc_handle_loads() then become 1-line functions that just call __kvmppc_handle_load() with the extra parameter. Reported-by:Bin Lu <lblulb@linux.vnet.ibm.com> Signed-off-by:
Paul Mackerras <paulus@ozlabs.org> Reviewed-by:
Thomas Huth <thuth@redhat.com> Signed-off-by:
Paul Mackerras <paulus@samba.org>
parent
ade3ac66
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