------- Comment From yasm...@br.ibm.com 2018-01-24 14:13 EDT------- The reason for this bug is because the h_set_sprg0 and h_page_init hypervisor calls were not yet implemented in Qemu 2.5. The problem was solved by two patches. They implement one hypercall each.
https://github.com/qemu/qemu/commit/423576f771db8c6dbb944ddb8dc15b472f62de4a This is a very simple hypercall that only sets up the SPRG0 register for the guest (since writing to SPRG0 was only permitted to the hypervisor in older versions of the PowerISA). https://github.com/qemu/qemu/commit/3240dd9a6924df18dfccb83defa0914065da076e This hypercall either initializes a page with zeros, or copies another page. According to LoPAPR, the i-cache of the page should also be flushed if using H_ICACHE_INVALIDATE or H_ICACHE_SYNCHRONIZE, and the d-cache should be synchronized to the RAM if the H_ICACHE_SYNCHRONIZE flag is used. For this, two new functions are introduced, kvmppc_dcbst_range() and kvmppc_icbi()_range, which use the corresponding assembler instructions to flush the caches if running with KVM on Power. If the code runs with TCG instead, the code only uses tb_flush(), assuming that this will be enough for synchronization. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1712803 Title: spapr_hcall from ubuntu_kvm_unit_test failed on ppc64el with Z-hwe kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1712803/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs