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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 0/9] x86: Always use eager-fpu
Remove the eager-fpu option and cleanup the code accordingly. The first patch is a bugfix, new in v2. The second patch removes the option and includes the justification. The rest of the patches are cleanup and mostly have no functional change. I measured a 0.7% geometric mean improvement with this series across a few different benchmarks (Linux VMs on an AMD host). I'm not sure the improvement is statistically significant, but it likely indicates it is no worse than before. A previous series to do this was submitted here: https://lore.kernel.org/xen-devel/20240304091307.2295344-1-fouad.hilly@xxxxxxxxx/ With the exception of patch 5, I haven't kept authorship and sign-offs since this is a reimplementation, albeit ending up at a similar place. Thanks, Ross Ross Lagerwall (8): x86/domain: Ensure a vCPU's FPU is reset early x86: Always use eager-fpu x86/vmx: Remove lazy FPU support x86/svm: Remove lazy FPU support x86: Remove fully_eager_fpu x86: Remove fpu_initialised/fpu_dirty x86/xstate: Stop tracking nonlazy xstate use x86: Cleanup cr0.TS flag handling Wei Liu (1): x86/traps: Remove lazy FPU support docs/misc/hypfs-paths.pandoc | 2 - docs/misc/xen-command-line.pandoc | 7 +- xen/arch/x86/cpu/common.c | 3 - xen/arch/x86/domain.c | 4 +- xen/arch/x86/domctl.c | 4 +- xen/arch/x86/hvm/emulate.c | 38 +------- xen/arch/x86/hvm/hvm.c | 16 ++-- xen/arch/x86/hvm/svm/nestedsvm.c | 67 +------------- xen/arch/x86/hvm/svm/svm.c | 81 +---------------- xen/arch/x86/hvm/svm/vmcb.c | 4 +- xen/arch/x86/hvm/vlapic.c | 3 - xen/arch/x86/hvm/vmx/vmcs.c | 8 +- xen/arch/x86/hvm/vmx/vmx.c | 70 +-------------- xen/arch/x86/hvm/vmx/vvmx.c | 15 +--- xen/arch/x86/i387.c | 109 ++--------------------- xen/arch/x86/include/asm/domain.h | 6 -- xen/arch/x86/include/asm/hvm/hvm.h | 3 - xen/arch/x86/include/asm/hvm/svm-types.h | 6 -- xen/arch/x86/include/asm/hvm/vmx/vmcs.h | 2 - xen/arch/x86/include/asm/i387.h | 4 +- xen/arch/x86/include/asm/spec_ctrl.h | 1 - xen/arch/x86/include/asm/xstate.h | 17 +--- xen/arch/x86/pv/misc-hypercalls.c | 3 +- xen/arch/x86/spec_ctrl.c | 88 +----------------- xen/arch/x86/traps.c | 20 +++-- xen/arch/x86/xstate.c | 24 ++--- xen/common/domain.c | 2 - xen/common/efi/runtime.c | 4 +- xen/include/xen/sched.h | 4 - 29 files changed, 59 insertions(+), 556 deletions(-) -- 2.53.0
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