Curently KVM ARM64 doesn't support to compile as a kernel module. It's useful to compile KVM as a module. For example, it could reload kvm without rebooting host machine. This patchset support this feature while there are some limitations to be solved. But I just send it out as RFC to get more suggestion and comments. The patchset could be fetched from: https://github.com/shannonz88/linux/tree/kvm_module Curently it only supports for VHE system due to the hyp code section address variables like __hyp_text_start. Also it can't call kvm_update_va_mask when loading kvm module and kernel panic with below errors. So I make kern_hyp_va into a nop funtion. Unable to handle kernel read from unreadable memory at virtual address ffff800008eda580 Mem abort info: ESR = 0x8600000f EC = 0x21: IABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000000ca1000 [ffff800008eda580] pgd=00002057fffff003, pud=00002057ffffe003, pmd=0000003799c63003, pte=00e800575140f713 Internal error: Oops: 8600000f [#1] SMP CPU: 25 PID: 9307 Comm: insmod Tainted: G E 5.4.0-rc4+ #39 pstate: 60400009 (nZCv daif +PAN -UAO) pc : 0xffff800008eda580 lr : __apply_alternatives+0x130/0x26c sp : ffff800022fdbb00 x29: ffff800022fdbb00 x28: ffff800008f105bc x27: 0000000000000005 x26: ffff800008f105bc x25: ffff800010b67dd0 x24: ffff800008eda580 x23: ffff800010f21eff x22: ffff800022fdbba8 x21: 0000000000000001 x20: ffff800022fdbba0 x19: ffff800008f232bc x18: ffff00379b437d90 x17: 0000000000000000 x16: 0000000000009000 x15: 0000000000000008 x14: 0000000000000a00 x13: 0000000000000001 x12: ffff205768d18010 x11: 00000000ffffffff x10: 0000000000aaaaaa x9 : ffff8000109b0cc8 x8 : 0000000000000001 x7 : ffff00579f9391a8 x6 : 0000000000000001 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000005 x2 : ffff800008f105bc x1 : ffff800008f105bc x0 : ffff800008f232bc Call trace: 0xffff800008eda580 apply_alternatives_module+0x64/0x84 module_finalize+0xa8/0xd0 load_module+0xf88/0x1b34 __do_sys_finit_module+0xd0/0xfc __arm64_sys_finit_module+0x28/0x34 el0_svc_handler+0x120/0x1d4 el0_svc+0x8/0xc Code: d34b2c00 17ffffea d4000002 d65f03c0 (a9ba7bfd) ---[ end trace 6de8ebc787a78157 ]--- Kernel panic - not syncing: Fatal exception SMP: stopping secondary CPUs Shannon Zhao (7): KVM: ARM: call hyp_cpu_pm_exit on correct fail and exit path KVM: arch_timer: Fix resource leak on error path KVM: vgic: make vgic parameters work well for module KVM: vgic: Add hyp uninitialize function KVM: arch_timer: Add hyp uninitialize function KVM: arm/arm64: Move target table register into register table init function KVM: ARM: Support KVM being compiled as a kernel module arch/arm/kvm/coproc.c | 3 ++ arch/arm/kvm/coproc.h | 3 ++ arch/arm/kvm/coproc_a15.c | 4 +-- arch/arm/kvm/coproc_a7.c | 4 +-- arch/arm64/include/asm/cache.h | 16 ++--------- arch/arm64/include/asm/cpufeature.h | 11 +------- arch/arm64/include/asm/fpsimd.h | 6 +--- arch/arm64/include/asm/kvm_host.h | 3 -- arch/arm64/include/asm/kvm_mmu.h | 4 +++ arch/arm64/include/asm/perf_event.h | 2 ++ arch/arm64/kernel/acpi.c | 1 + arch/arm64/kernel/asm-offsets.c | 2 +- arch/arm64/kernel/cpu_errata.c | 15 +++++++++- arch/arm64/kernel/cpufeature.c | 2 ++ arch/arm64/kernel/cpuinfo.c | 16 +++++++++++ arch/arm64/kernel/entry-fpsimd.S | 2 ++ arch/arm64/kernel/entry.S | 1 + arch/arm64/kernel/fpsimd.c | 11 ++++++++ arch/arm64/kernel/head.S | 1 + arch/arm64/kernel/hibernate.c | 6 ++++ arch/arm64/kernel/hyp-stub.S | 1 + arch/arm64/kernel/insn.c | 2 ++ arch/arm64/kernel/perf_event.c | 19 +++++++++++-- arch/arm64/kernel/probes/kprobes.c | 2 ++ arch/arm64/kernel/smp.c | 1 + arch/arm64/kernel/traps.c | 2 ++ arch/arm64/kvm/Kconfig | 19 ++++++++++--- arch/arm64/kvm/Makefile | 53 ++++++++++++++++++++---------------- arch/arm64/kvm/hyp/Makefile | 22 +++++++-------- arch/arm64/kvm/sys_regs.c | 1 + arch/arm64/kvm/sys_regs.h | 2 ++ arch/arm64/kvm/sys_regs_generic_v8.c | 5 +--- arch/arm64/kvm/va_layout.c | 7 ++++- arch/arm64/mm/cache.S | 2 ++ arch/arm64/mm/hugetlbpage.c | 2 ++ arch/arm64/mm/mmu.c | 4 +++ drivers/clocksource/arm_arch_timer.c | 1 + drivers/irqchip/irq-gic-common.c | 1 + drivers/irqchip/irq-gic-v4.c | 8 ++++++ include/kvm/arm_arch_timer.h | 1 + include/kvm/arm_vgic.h | 1 + include/linux/interrupt.h | 6 +--- kernel/irq/manage.c | 6 ++++ mm/pgtable-generic.c | 1 + virt/kvm/arm/arch_timer.c | 19 +++++++++++-- virt/kvm/arm/arm.c | 41 ++++++++++++++++++++++++++-- virt/kvm/arm/mmu.c | 4 +++ virt/kvm/arm/vgic/vgic-init.c | 7 +++++ virt/kvm/arm/vgic/vgic-v3.c | 7 +++++ 49 files changed, 264 insertions(+), 96 deletions(-) -- 1.8.3.1 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
