Currently on powerpc we store and access floating-point and vector state in various ad-hoc arrays in places such as the thread_struct and the kvm_vcpu_arch struct. This leads to code duplication for the code that transfers this state between CPU registers and memory, and leads to double-copying in the case of PR KVM, where we copy state from the kvm_vcpu_arch struct to the thread_struct, and then load it up into CPU registers from the thread_struct. To simplify all this, this patch series defines a struct for storing FP/VSX state including FPSCR, and a struct for storing vector state (VMX/Altivec) including VSCR. These structs then get used in both the thread_struct and the kvm_vcpu_arch struct, enabling us to use common functions for loading and storing the CPU register state, and avoid double copying. The benefit can be seen in that the series deletes 330 more lines than it adds. This series will also help greatly in implementing the support in KVM for saving and restoring transactional register state on POWER8. This series is against the "queue" branch of the kvm.git tree. I used that as a base because it has pulled in Linus' tree recently and thus has the most recent powerpc code from Ben H's next branch as well as the latest KVM code. Paul. arch/powerpc/include/asm/kvm_book3s.h | 3 - arch/powerpc/include/asm/kvm_host.h | 12 +-- arch/powerpc/include/asm/ppc_asm.h | 95 ++--------------- arch/powerpc/include/asm/processor.h | 47 +++++---- arch/powerpc/include/asm/sfp-machine.h | 2 +- arch/powerpc/include/asm/switch_to.h | 2 - arch/powerpc/kernel/align.c | 6 +- arch/powerpc/kernel/asm-offsets.c | 36 +++---- arch/powerpc/kernel/fpu.S | 84 +++++++-------- arch/powerpc/kernel/ppc_ksyms.c | 4 + arch/powerpc/kernel/process.c | 15 ++- arch/powerpc/kernel/ptrace.c | 49 ++++----- arch/powerpc/kernel/ptrace32.c | 11 +- arch/powerpc/kernel/signal_32.c | 72 ++++++------- arch/powerpc/kernel/signal_64.c | 29 +++--- arch/powerpc/kernel/tm.S | 41 ++++---- arch/powerpc/kernel/traps.c | 10 +- arch/powerpc/kernel/vecemu.c | 6 +- arch/powerpc/kernel/vector.S | 77 +++++++------- arch/powerpc/kvm/book3s.c | 38 +++++-- arch/powerpc/kvm/book3s_exports.c | 4 - arch/powerpc/kvm/book3s_hv.c | 42 -------- arch/powerpc/kvm/book3s_hv_rmhandlers.S | 82 ++++----------- arch/powerpc/kvm/book3s_paired_singles.c | 169 +++++++++++++++---------------- arch/powerpc/kvm/book3s_pr.c | 145 +++++--------------------- arch/powerpc/kvm/book3s_rmhandlers.S | 47 --------- arch/powerpc/kvm/booke.c | 21 ---- arch/powerpc/kvm/booke.h | 5 +- arch/powerpc/kvm/powerpc.c | 4 +- 29 files changed, 414 insertions(+), 744 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
