Hi Tony. Could you give me comments/hints to make progress? What do you think about those patches? I believe that ia64/kvm and other ia64 virtualization technologies also can get much benefit from ia64/pv_ops and that no performance penalties exist with CONFIG_PARAVIRT=n. Regarding to the ia64/xen specific patches, should they go through the xen maintainer like the ia64/kvm patches did? thanks, On Wed, Apr 30, 2008 at 09:29:13PM +0900, Isaku Yamahata wrote: > Hi. This patchset implements ia64/pv_ops support which is the > framework for virtualization support. > Now all the comments so far have been addressed, but only a few exceptions. > > On x86 various ways to support virtualization were proposed, and > eventually pv_ops won. So on ia64 the pv_ops strategy is appropriate too. > Later I'll post the patchset which implements xen domU based on > ia64/pv_ops. Currently only ia64/xen pv_ops implementation exists, > but I believe ia64/kvm can also obtain benefits from this ia64/pv_ops > frame work. > linux/ia64 has the machine vector interface and another approach might be > to utilize it. However pv_ops is better for some reasons. Please see > the thread of the mailing list from > http://www.spinics.net/lists/linux-ia64/msg05238.html > > > This patchset does the followings. > - some preparation work. Mainly make the kernel virtualization friendly. > - introduce pv_info which describes the execution environment. > - introduce macros for hand written assembly code to paravirtualize > hand written code to replace sensitive/privileged instructions. > - introduce various hooks to replace the implementation with > paravirtualized. > They are defined as function tables called, pv_init_ops, pv_cpu_ops, > pv_irq_ops, pv_iosapic_ops and, pv_time_ops. > They represent > pv_init_ops: hooks for various initialization. > pv_cpu_ops: hooks for ia64 intrinsics. > pv_irq_ops: hooks for irq related operations. > pv_iosapic_ops: hooks for paravirtualized iosapic. > pv_time_ops: hooks for steal time accounting > > > The working full source is available from > http://people.valinux.co.jp/~yamahata/xen-ia64/linux-2.6-xen-ia64.git/ > branch: xen-ia64-2008apr30 > > At this phase, we don't address the following issues. > Those will be addressed after the first merge. > - optimization by binary patch > In fact, we had the patch to do that, but we intentionally dropped > for patch size/readability/cleanness. > - freeing the unused pages, i.e. pages for unused ivt.S. > > Changes from take 4: > - refined NR_IRQS paravirtualization according to Jes Soresen's comment > - rebased and fixed the breakage due to the upstream change. > - fixed various compilation errors. > > Changes from take 3: > - split the patch set into pv_op part and xen domU part. > - many clean ups. > - introduced pv_ops: pv_cpu_ops and pv_time_ops. > > Changes from take 2: > - many clean ups following to comments. > - clean up:assembly instruction macro. > - introduced pv_ops: pv_info, pv_init_ops, pv_iosapic_ops, pv_irq_ops. > > Changes from take 1: > Single IVT source code. compile multitimes using assembler macros. > > thanks, > > Diffstat: > arch/ia64/Makefile | 6 + > arch/ia64/kernel/Makefile | 44 +++++ > arch/ia64/kernel/entry.S | 115 +++++++---- > arch/ia64/kernel/iosapic.c | 45 +++-- > arch/ia64/kernel/irq_ia64.c | 19 ++- > arch/ia64/kernel/ivt.S | 227 +++++++++++----------- > arch/ia64/kernel/minstate.h | 13 +- > arch/ia64/kernel/nr-irqs.c | 24 +++ > arch/ia64/kernel/paravirt.c | 369 ++++++++++++++++++++++++++++++++++++ > arch/ia64/kernel/paravirt_inst.h | 29 +++ > arch/ia64/kernel/paravirtentry.S | 60 ++++++ > arch/ia64/kernel/setup.c | 10 + > arch/ia64/kernel/smpboot.c | 2 + > arch/ia64/kernel/time.c | 23 +++ > include/asm-ia64/Kbuild | 2 +- > include/asm-ia64/gcc_intrin.h | 24 ++-- > include/asm-ia64/hw_irq.h | 23 ++- > include/asm-ia64/intel_intrin.h | 41 ++-- > include/asm-ia64/intrinsics.h | 55 ++++++ > include/asm-ia64/iosapic.h | 18 ++- > include/asm-ia64/irq.h | 9 +- > include/asm-ia64/mmu_context.h | 6 +- > include/asm-ia64/native/inst.h | 180 ++++++++++++++++++ > include/asm-ia64/native/irq.h | 35 ++++ > include/asm-ia64/paravirt.h | 252 ++++++++++++++++++++++++ > include/asm-ia64/paravirt_privop.h | 114 +++++++++++ > include/asm-ia64/smp.h | 2 + > include/asm-ia64/system.h | 10 +- > 28 files changed, 1520 insertions(+), 237 deletions(-) -- yamahata _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
