Hi Paolo,
Please find below the KVM/ARM updates for 4.6. As you can tell by the
explosion of your mailbox, we've been fairly busy lately.
Most notable things are PMU support for guests, as well as the v8.1
VHE support. Other than that, the 32bit port went under the knife just
like we did for the 64bit port in 4.5, rewriting most of the assembly
code in C for ease of maintenance as well as code sharing. Finally, a
handful of optimizations that do speed up the world switch.
Please note that:
- the series is on top of 4.5-rc6 in order to avoid ugly conflicts
with the fixes that went in during the 4.5 cycle
- there is still quite a few conflicts with the arm64 tree that should
be resolved just like it has been done in linux-next
Thanks!
M.
The following changes since commit fc77dbd34c5c99bce46d40a2491937c3bcbd10af:
Linux 4.5-rc6 (2016-02-28 08:41:20 -0800)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git
kvm-arm-for-4.6
for you to fetch changes up to b40c4892d175874d118860c8282a85ee7b64bcbb:
arm64: KVM: vgic-v3: Only wipe LRs on vcpu exit (2016-03-09 04:24:16 +0000)
----------------------------------------------------------------
KVM/ARM updates for 4.6
- VHE support so that we can run the kernel at EL2 on ARMv8.1 systems
- PMU support for guests
- 32bit world switch rewritten in C
- Various optimizations to the vgic save/restore code
----------------------------------------------------------------
Marc Zyngier (76):
arm/arm64: KVM: Add hook for C-based stage2 init
ARM: KVM: Move the HYP code to its own section
ARM: KVM: Remove __kvm_hyp_code_start/__kvm_hyp_code_end
ARM: KVM: Move VFP registers to a CPU context structure
ARM: KVM: Move CP15 array into the CPU context structure
ARM: KVM: Move GP registers into the CPU context structure
ARM: KVM: Add a HYP-specific header file
ARM: KVM: Add system register accessor macros
ARM: KVM: Add TLB invalidation code
ARM: KVM: Add CP15 save/restore code
ARM: KVM: Add timer save/restore
ARM: KVM: Add vgic v2 save/restore
ARM: KVM: Add VFP save/restore
ARM: KVM: Add banked registers save/restore
ARM: KVM: Add guest entry code
ARM: KVM: Add VFP lazy save/restore handler
ARM: KVM: Add the new world switch implementation
ARM: KVM: Add populating of fault data structure
ARM: KVM: Add HYP mode entry code
ARM: KVM: Add panic handling code
ARM: KVM: Change kvm_call_hyp return type to unsigned long
ARM: KVM: Remove the old world switch
ARM: KVM: Switch to C-based stage2 init
ARM: KVM: Remove __weak attributes
ARM: KVM: Turn CP15 defines to an enum
ARM: KVM: Cleanup asm-offsets.c
ARM: KVM: Remove unused hyp_pc field
ARM: KVM: Remove handling of ARM_EXCEPTION_DATA/PREF_ABORT
ARM: KVM: Remove __kvm_hyp_exit/__kvm_hyp_exit_end
arm/arm64: KVM: Handle out-of-RAM cache maintenance as a NOP
arm64: KVM: Switch to C-based stage2 init
arm/arm64: Add new is_kernel_in_hyp_mode predicate
arm64: Allow the arch timer to use the HYP timer
arm64: Add ARM64_HAS_VIRT_HOST_EXTN feature
arm64: KVM: Skip HYP setup when already running in HYP
arm64: KVM: VHE: Patch out use of HVC
arm64: KVM: VHE: Patch out kern_hyp_va
arm64: KVM: VHE: Introduce unified system register accessors
arm64: KVM: VHE: Differenciate host/guest sysreg save/restore
arm64: KVM: VHE: Split save/restore of registers shared between guest and
host
arm64: KVM: VHE: Use unified system register accessors
arm64: KVM: VHE: Enable minimal sysreg save/restore
arm64: KVM: VHE: Make __fpsimd_enabled VHE aware
arm64: KVM: VHE: Implement VHE activate/deactivate_traps
arm64: KVM: VHE: Use unified sysreg accessors for timer
arm64: KVM: VHE: Add fpsimd enabling on guest access
arm64: KVM: VHE: Add alternative panic handling
arm64: KVM: Move most of the fault decoding to C
arm64: perf: Count EL2 events if the kernel is running in HYP
arm64: hw_breakpoint: Allow EL2 breakpoints if running in HYP
arm64: VHE: Add support for running Linux in EL2 mode
arm64: KVM: Move kvm/hyp/hyp.h to include/asm/kvm_hyp.h
arm64: KVM: Move vgic-v2 and timer save/restore to virt/kvm/arm/hyp
ARM: KVM: Move kvm/hyp/hyp.h to include/asm/kvm_hyp.h
ARM: KVM: Use common version of vgic-v2-sr.c
ARM: KVM: Use common version of timer-sr.c
arm64: KVM: Move __cpu_init_stage2 after kvm_call_hyp
arm64: KVM: Add temporary kvm_perf_event.h
arm64: KVM: Switch the sys_reg search to be a binary search
ARM: KVM: Properly sort the invariant table
ARM: KVM: Enforce sorting of all CP tables
ARM: KVM: Rename struct coproc_reg::is_64 to is_64bit
ARM: KVM: Switch the CP reg search to be a binary search
KVM: arm/arm64: timer: Add active state caching
KVM: arm/arm64: vgic-v2: Avoid accessing GICH registers
KVM: arm/arm64: vgic-v2: Save maintenance interrupt state only if required
KVM: arm/arm64: vgic-v2: Move GICH_ELRSR saving to its own function
KVM: arm/arm64: vgic-v2: Do not save an LR known to be empty
KVM: arm/arm64: vgic-v2: Reset LRs at boot time
KVM: arm/arm64: vgic-v2: Only wipe LRs on vcpu exit
KVM: arm/arm64: vgic-v2: Make GICD_SGIR quicker to hit
arm64: KVM: vgic-v3: Avoid accessing ICH registers
arm64: KVM: vgic-v3: Save maintenance interrupt state only if required
arm64: KVM: vgic-v3: Do not save an LR known to be empty
arm64: KVM: vgic-v3: Reset LRs at boot time
arm64: KVM: vgic-v3: Only wipe LRs on vcpu exit
Shannon Zhao (19):
arm64: KVM: Define PMU data structure for each vcpu
arm64: KVM: Add access handler for PMCR register
arm64: KVM: Add access handler for PMSELR register
arm64: KVM: Add access handler for PMCEID0 and PMCEID1 register
arm64: KVM: Add access handler for event counter register
arm64: KVM: Add access handler for PMCNTENSET and PMCNTENCLR register
arm64: KVM: PMU: Add perf event map and introduce perf event creating
function
arm64: KVM: Add access handler for event type register
arm64: KVM: Add access handler for PMINTENSET and PMINTENCLR register
arm64: KVM: Add access handler for PMOVSSET and PMOVSCLR register
arm64: KVM: Add access handler for PMSWINC register
arm64: KVM: Add helper to handle PMCR register bits
arm64: KVM: Add access handler for PMUSERENR register
arm64: KVM: Add PMU overflow interrupt routing
arm64: KVM: Reset PMU state when resetting vcpu
arm64: KVM: Free perf event of PMU when destroying vcpu
arm64: KVM: Add a new feature bit for PMUv3
arm64: KVM: Introduce per-vcpu kvm device controls
arm64: KVM: Add a new vcpu device control group for PMUv3
Documentation/virtual/kvm/api.txt | 12 +-
Documentation/virtual/kvm/devices/vcpu.txt | 33 ++
arch/arm/include/asm/kvm_asm.h | 41 +-
arch/arm/include/asm/kvm_emulate.h | 20 +-
arch/arm/include/asm/kvm_host.h | 80 ++-
arch/arm/include/asm/kvm_hyp.h | 139 +++++
arch/arm/include/asm/kvm_mmu.h | 2 +-
arch/arm/include/asm/virt.h | 9 +
arch/arm/kernel/asm-offsets.c | 40 +-
arch/arm/kernel/vmlinux.lds.S | 6 +
arch/arm/kvm/Makefile | 1 +
arch/arm/kvm/arm.c | 244 ++++++---
arch/arm/kvm/coproc.c | 126 +++--
arch/arm/kvm/coproc.h | 24 +-
arch/arm/kvm/emulate.c | 34 +-
arch/arm/kvm/guest.c | 5 +-
arch/arm/kvm/handle_exit.c | 7 -
arch/arm/kvm/hyp/Makefile | 17 +
arch/arm/kvm/hyp/banked-sr.c | 77 +++
arch/arm/kvm/hyp/cp15-sr.c | 84 +++
arch/arm/kvm/hyp/entry.S | 101 ++++
arch/arm/kvm/hyp/hyp-entry.S | 169 ++++++
arch/arm/kvm/hyp/s2-setup.c | 33 ++
arch/arm/kvm/hyp/switch.c | 232 +++++++++
arch/arm/kvm/hyp/tlb.c | 70 +++
arch/arm/kvm/hyp/vfp.S | 68 +++
arch/arm/kvm/init.S | 8 -
arch/arm/kvm/interrupts.S | 480 +-----------------
arch/arm/kvm/interrupts_head.S | 648 ------------------------
arch/arm/kvm/mmu.c | 23 +
arch/arm/kvm/reset.c | 2 +-
arch/arm64/Kconfig | 13 +
arch/arm64/include/asm/cpufeature.h | 6 +-
arch/arm64/include/asm/hw_breakpoint.h | 18 +-
arch/arm64/include/asm/kvm_arm.h | 6 +-
arch/arm64/include/asm/kvm_asm.h | 6 +-
arch/arm64/include/asm/kvm_emulate.h | 8 +
arch/arm64/include/asm/kvm_host.h | 34 +-
arch/arm64/include/asm/kvm_hyp.h | 181 +++++++
arch/arm64/include/asm/kvm_mmu.h | 12 +-
arch/arm64/include/asm/kvm_perf_event.h | 68 +++
arch/arm64/include/asm/virt.h | 10 +
arch/arm64/include/uapi/asm/kvm.h | 6 +
arch/arm64/kernel/asm-offsets.c | 3 -
arch/arm64/kernel/cpufeature.c | 11 +
arch/arm64/kernel/head.S | 28 +-
arch/arm64/kernel/perf_event.c | 6 +-
arch/arm64/kvm/Kconfig | 7 +
arch/arm64/kvm/Makefile | 1 +
arch/arm64/kvm/guest.c | 51 ++
arch/arm64/kvm/hyp-init.S | 15 +-
arch/arm64/kvm/hyp.S | 7 +
arch/arm64/kvm/hyp/Makefile | 8 +-
arch/arm64/kvm/hyp/debug-sr.c | 4 +-
arch/arm64/kvm/hyp/entry.S | 6 +
arch/arm64/kvm/hyp/hyp-entry.S | 109 ++--
arch/arm64/kvm/hyp/hyp.h | 90 ----
arch/arm64/kvm/hyp/s2-setup.c | 43 ++
arch/arm64/kvm/hyp/switch.c | 206 +++++++-
arch/arm64/kvm/hyp/sysreg-sr.c | 149 ++++--
arch/arm64/kvm/hyp/tlb.c | 2 +-
arch/arm64/kvm/hyp/vgic-v2-sr.c | 84 ---
arch/arm64/kvm/hyp/vgic-v3-sr.c | 341 ++++++++-----
arch/arm64/kvm/reset.c | 7 +
arch/arm64/kvm/sys_regs.c | 609 ++++++++++++++++++++--
drivers/clocksource/arm_arch_timer.c | 96 ++--
include/kvm/arm_arch_timer.h | 5 +
include/kvm/arm_pmu.h | 110 ++++
include/kvm/arm_vgic.h | 8 +-
include/uapi/linux/kvm.h | 2 +
virt/kvm/arm/arch_timer.c | 31 ++
{arch/arm64/kvm => virt/kvm/arm}/hyp/timer-sr.c | 14 +-
virt/kvm/arm/hyp/vgic-v2-sr.c | 170 +++++++
virt/kvm/arm/pmu.c | 529 +++++++++++++++++++
virt/kvm/arm/vgic-v2-emul.c | 10 +-
virt/kvm/arm/vgic-v2.c | 12 +
virt/kvm/arm/vgic-v3.c | 11 +-
77 files changed, 4023 insertions(+), 1965 deletions(-)
create mode 100644 Documentation/virtual/kvm/devices/vcpu.txt
create mode 100644 arch/arm/include/asm/kvm_hyp.h
create mode 100644 arch/arm/kvm/hyp/Makefile
create mode 100644 arch/arm/kvm/hyp/banked-sr.c
create mode 100644 arch/arm/kvm/hyp/cp15-sr.c
create mode 100644 arch/arm/kvm/hyp/entry.S
create mode 100644 arch/arm/kvm/hyp/hyp-entry.S
create mode 100644 arch/arm/kvm/hyp/s2-setup.c
create mode 100644 arch/arm/kvm/hyp/switch.c
create mode 100644 arch/arm/kvm/hyp/tlb.c
create mode 100644 arch/arm/kvm/hyp/vfp.S
delete mode 100644 arch/arm/kvm/interrupts_head.S
create mode 100644 arch/arm64/include/asm/kvm_hyp.h
create mode 100644 arch/arm64/include/asm/kvm_perf_event.h
delete mode 100644 arch/arm64/kvm/hyp/hyp.h
create mode 100644 arch/arm64/kvm/hyp/s2-setup.c
delete mode 100644 arch/arm64/kvm/hyp/vgic-v2-sr.c
create mode 100644 include/kvm/arm_pmu.h
rename {arch/arm64/kvm => virt/kvm/arm}/hyp/timer-sr.c (86%)
create mode 100644 virt/kvm/arm/hyp/vgic-v2-sr.c
create mode 100644 virt/kvm/arm/pmu.c
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