Hi, A pseries guest can be run as a secure guest on Ultravisor-enabled POWER platforms. On such platforms, this driver will be used to manage the movement of guest pages between the normal memory managed by hypervisor(HV) and secure memory managed by Ultravisor(UV). Private ZONE_DEVICE memory equal to the amount of secure memory available in the platform for running secure guests is created via a char device. Whenever a page belonging to the guest becomes secure, a page from this private device memory is used to represent and track that secure page on the HV side. The movement of pages between normal and secure memory is done via migrate_vma_pages(). The page-in or page-out requests from UV will come to HV as hcalls and HV will call back into UV via uvcalls to satisfy these page requests. These patches are against Christoph Hellwig's migrate_vma-cleanup.2 branch (http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/migrate_vma-cleanup.2) plus Claudio Carvalho's base ultravisor enablement patchset (https://lore.kernel.org/linuxppc-dev/20190808040555.2371-1-cclaudio@xxxxxxxxxxxxx/T/#t) These patches along with Claudio's above patches are required to run a secure pseries guest on KVM. Changes in v6 ============= Updated the driver to account for the changes in HMM and migrate_vma() by Christoph Hellwig. - Not using any HMM routines any more. - Switched to using migrate_vma_pages() v5: https://www.mail-archive.com/linuxppc-dev@xxxxxxxxxxxxxxxx/msg153294.html Anshuman Khandual (1): KVM: PPC: Ultravisor: Add PPC_UV config option Bharata B Rao (6): kvmppc: Driver to manage pages of secure guest kvmppc: Shared pages support for secure guests kvmppc: H_SVM_INIT_START and H_SVM_INIT_DONE hcalls kvmppc: Handle memory plug/unplug to secure VM kvmppc: Radix changes for secure guest kvmppc: Support reset of secure guest Documentation/virtual/kvm/api.txt | 18 + arch/powerpc/Kconfig | 18 + arch/powerpc/include/asm/hvcall.h | 9 + arch/powerpc/include/asm/kvm_book3s_devm.h | 48 ++ arch/powerpc/include/asm/kvm_host.h | 28 + arch/powerpc/include/asm/kvm_ppc.h | 2 + arch/powerpc/include/asm/ultravisor-api.h | 6 + arch/powerpc/include/asm/ultravisor.h | 36 ++ arch/powerpc/kvm/Makefile | 3 + arch/powerpc/kvm/book3s_64_mmu_radix.c | 22 + arch/powerpc/kvm/book3s_hv.c | 115 ++++ arch/powerpc/kvm/book3s_hv_devm.c | 668 +++++++++++++++++++++ arch/powerpc/kvm/powerpc.c | 12 + include/uapi/linux/kvm.h | 1 + 14 files changed, 986 insertions(+) create mode 100644 arch/powerpc/include/asm/kvm_book3s_devm.h create mode 100644 arch/powerpc/kvm/book3s_hv_devm.c -- 2.21.0
