Paolo,
Here's the (pretty large) set of KVM/arm64 updates for 5.10.
This time around, more of the work we're doing on the pKVM front: new
page table code, new EL2-private data structures, including a per-CPU
infrastructure. Also, we now have a way for userspace to decide which
PMU events get counted. Finally, a complete rework of the Spectre
mitigation, as the existing code had quickly become completely
unmaintainable.
A couple of notes:
- The Spectre stuff is a shared branch between the arm64 and the KVM,
so both tries carry the whole thing
- The branch is based on -rc4, but would have (badly) conflicted with
some of the fixes merged in -rc5. So I did the merge myself, solving
the conflicts myself. This may explain why some of the patches have
an air of "déjà vu" (the steal-time fixes, for example)...
The following changes since commit f4d51dffc6c01a9e94650d95ce0104964f8ae822:
Linux 5.9-rc4 (2020-09-06 17:11:40 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-5.10
for you to fetch changes up to 4e5dc64c43192b4fd4c96ac150a8f013065f5f5b:
Merge branches 'kvm-arm64/pt-new' and 'kvm-arm64/pmu-5.9' into kvmarm-master/next (2020-10-02 09:25:55 +0100)
----------------------------------------------------------------
KVM/arm64 updates for Linux 5.10
- New page table code for both hypervisor and guest stage-2
- Introduction of a new EL2-private host context
- Allow EL2 to have its own private per-CPU variables
- Support of PMU event filtering
- Complete rework of the Spectre mitigation
----------------------------------------------------------------
Alexandru Elisei (5):
KVM: arm64: Update page shift if stage 2 block mapping not supported
KVM: arm64: Try PMD block mappings if PUD mappings are not supported
KVM: arm64: Do not flush memslot if FWB is supported
KVM: arm64: Add undocumented return values for PMU device control group
KVM: arm64: Match PMU error code descriptions with error conditions
Andrew Jones (6):
KVM: arm64: pvtime: steal-time is only supported when configured
KVM: arm64: pvtime: Fix potential loss of stolen time
KVM: arm64: Drop type input from kvm_put_guest
KVM: arm64: pvtime: Fix stolen time accounting across migration
KVM: Documentation: Minor fixups
arm64/x86: KVM: Introduce steal-time cap
Andrew Scull (19):
KVM: arm64: Remove __activate_vm wrapper
KVM: arm64: Remove hyp_panic arguments
KVM: arm64: Remove kvm_host_data_t typedef
KVM: arm64: Choose hyp symbol based on context
KVM: arm64: Save chosen hyp vector to a percpu variable
KVM: arm64: nVHE: Use separate vector for the host
KVM: arm64: nVHE: Don't consume host SErrors with ESB
KVM: arm64: Introduce hyp context
KVM: arm64: Update context references from host to hyp
KVM: arm64: Restore hyp when panicking in guest context
KVM: arm64: Share context save and restore macros
KVM: arm64: nVHE: Switch to hyp context for EL2
KVM: arm64: nVHE: Handle hyp panics
KVM: arm64: nVHE: Pass pointers consistently to hyp-init
smccc: Define vendor hyp owned service call region
smccc: Use separate variables for args and results
KVM: arm64: nVHE: Migrate hyp interface to SMCCC
KVM: arm64: nVHE: Migrate hyp-init to SMCCC
KVM: arm64: nVHE: Fix pointers during SMCCC convertion
David Brazdil (10):
kvm: arm64: Partially link nVHE hyp code, simplify HYPCOPY
kvm: arm64: Move nVHE hyp namespace macros to hyp_image.h
kvm: arm64: Only define __kvm_ex_table for CONFIG_KVM
kvm: arm64: Remove __hyp_this_cpu_read
kvm: arm64: Remove hyp_adr/ldr_this_cpu
kvm: arm64: Add helpers for accessing nVHE hyp per-cpu vars
kvm: arm64: Duplicate arm64_ssbd_callback_required for nVHE hyp
kvm: arm64: Create separate instances of kvm_host_data for VHE/nVHE
kvm: arm64: Set up hyp percpu data for nVHE
kvm: arm64: Remove unnecessary hyp mappings
Liu Shixin (1):
KVM: arm64: vgic-debug: Convert to use DEFINE_SEQ_ATTRIBUTE macro
Marc Zyngier (23):
KVM: arm64: Do not try to map PUDs when they are folded into PMD
KVM: arm64: Fix address truncation in traces
Merge branch 'kvm-arm64/pt-new' into kvmarm-master/next
Merge branch 'kvm-arm64/nvhe-hyp-context' into kvmarm-master/next
Merge branch 'kvm-arm64/pt-new' into kvmarm-master/next
Merge branch 'kvm-arm64/misc-5.10' into kvmarm-master/next
arm64: Make use of ARCH_WORKAROUND_1 even when KVM is not enabled
arm64: Run ARCH_WORKAROUND_1 enabling code on all CPUs
KVM: arm64: Refactor PMU attribute error handling
KVM: arm64: Use event mask matching architecture revision
KVM: arm64: Add PMU event filtering infrastructure
KVM: arm64: Mask out filtered events in PCMEID{0,1}_EL1
KVM: arm64: Document PMU filtering API
Merge branch 'kvm-arm64/pmu-5.9' into kvmarm-master/next
arm64: Run ARCH_WORKAROUND_2 enabling code on all CPUs
KVM: arm64: Set CSV2 for guests on hardware unaffected by Spectre-v2
KVM: arm64: Simplify handling of ARCH_WORKAROUND_2
KVM: arm64: Get rid of kvm_arm_have_ssbd()
KVM: arm64: Convert ARCH_WORKAROUND_2 to arm64_get_spectre_v4_state()
arm64: Get rid of arm64_ssbd_state
Merge remote-tracking branch 'arm64/for-next/ghostbusters' into kvm-arm64/hyp-pcpu
Merge branch 'kvm-arm64/hyp-pcpu' into kvmarm-master/next
Merge branches 'kvm-arm64/pt-new' and 'kvm-arm64/pmu-5.9' into kvmarm-master/next
Mauro Carvalho Chehab (1):
KVM: arm64: Fix some documentation build warnings
Quentin Perret (4):
KVM: arm64: Add support for stage-2 write-protect in generic page-table
KVM: arm64: Convert write-protect operation to generic page-table API
KVM: arm64: Add support for stage-2 cache flushing in generic page-table
KVM: arm64: Convert memslot cache-flushing code to generic page-table API
Tian Tao (1):
KVM: arm64: Fix inject_fault.c kernel-doc warnings
Will Deacon (33):
KVM: arm64: Remove kvm_mmu_free_memory_caches()
KVM: arm64: Add stand-alone page-table walker infrastructure
KVM: arm64: Add support for creating kernel-agnostic stage-1 page tables
KVM: arm64: Use generic allocator for hyp stage-1 page-tables
KVM: arm64: Add support for creating kernel-agnostic stage-2 page tables
KVM: arm64: Add support for stage-2 map()/unmap() in generic page-table
KVM: arm64: Convert kvm_phys_addr_ioremap() to generic page-table API
KVM: arm64: Convert kvm_set_spte_hva() to generic page-table API
KVM: arm64: Convert unmap_stage2_range() to generic page-table API
KVM: arm64: Add support for stage-2 page-aging in generic page-table
KVM: arm64: Convert page-aging and access faults to generic page-table API
KVM: arm64: Add support for relaxing stage-2 perms in generic page-table code
KVM: arm64: Convert user_mem_abort() to generic page-table API
KVM: arm64: Check the pgt instead of the pgd when modifying page-table
KVM: arm64: Remove unused page-table code
KVM: arm64: Remove unused 'pgd' field from 'struct kvm_s2_mmu'
KVM: arm64: Don't constrain maximum IPA size based on host configuration
arm64: Remove Spectre-related CONFIG_* options
KVM: arm64: Replace CONFIG_KVM_INDIRECT_VECTORS with CONFIG_RANDOMIZE_BASE
KVM: arm64: Simplify install_bp_hardening_cb()
arm64: Rename ARM64_HARDEN_BRANCH_PREDICTOR to ARM64_SPECTRE_V2
arm64: Introduce separate file for spectre mitigations and reporting
arm64: Rewrite Spectre-v2 mitigation code
arm64: Group start_thread() functions together
arm64: Treat SSBS as a non-strict system feature
arm64: Rename ARM64_SSBD to ARM64_SPECTRE_V4
arm64: Move SSBD prctl() handler alongside other spectre mitigation code
arm64: Rewrite Spectre-v4 mitigation code
KVM: arm64: Allow patching EL2 vectors even with KASLR is not enabled
arm64: Pull in task_stack_page() to Spectre-v4 mitigation code
arm64: Add support for PR_SPEC_DISABLE_NOEXEC prctl() option
KVM: arm64: Pass level hint to TLBI during stage-2 permission fault
KVM: arm64: Ensure user_mem_abort() return value is initialised
Xiaofei Tan (1):
KVM: arm64: Fix doc warnings in mmu code
Documentation/virt/kvm/api.rst | 22 +-
Documentation/virt/kvm/devices/vcpu.rst | 57 +-
arch/arm64/Kconfig | 26 -
arch/arm64/include/asm/assembler.h | 29 +-
arch/arm64/include/asm/cpucaps.h | 4 +-
arch/arm64/include/asm/cpufeature.h | 24 -
arch/arm64/include/asm/hyp_image.h | 36 +
arch/arm64/include/asm/kvm_asm.h | 192 +++-
arch/arm64/include/asm/kvm_emulate.h | 14 -
arch/arm64/include/asm/kvm_host.h | 77 +-
arch/arm64/include/asm/kvm_hyp.h | 9 +-
arch/arm64/include/asm/kvm_mmu.h | 341 +-----
arch/arm64/include/asm/kvm_pgtable.h | 309 +++++
arch/arm64/include/asm/kvm_ptrauth.h | 6 +-
arch/arm64/include/asm/mmu.h | 11 +-
arch/arm64/include/asm/percpu.h | 28 +-
arch/arm64/include/asm/pgtable-hwdef.h | 24 -
arch/arm64/include/asm/pgtable-prot.h | 19 -
arch/arm64/include/asm/processor.h | 44 +-
arch/arm64/include/asm/spectre.h | 32 +
arch/arm64/include/asm/stage2_pgtable.h | 215 ----
arch/arm64/include/uapi/asm/kvm.h | 25 +
arch/arm64/kernel/Makefile | 3 +-
arch/arm64/kernel/cpu_errata.c | 487 +-------
arch/arm64/kernel/cpufeature.c | 51 +-
arch/arm64/kernel/entry.S | 10 +-
arch/arm64/kernel/hibernate.c | 6 +-
arch/arm64/kernel/image-vars.h | 5 -
arch/arm64/kernel/process.c | 23 +-
arch/arm64/kernel/proton-pack.c | 792 +++++++++++++
arch/arm64/kernel/ssbd.c | 129 ---
arch/arm64/kernel/suspend.c | 3 +-
arch/arm64/kernel/vmlinux.lds.S | 13 +
arch/arm64/kvm/Kconfig | 3 -
arch/arm64/kvm/Makefile | 2 +-
arch/arm64/kvm/arm.c | 113 +-
arch/arm64/kvm/hyp.S | 34 -
arch/arm64/kvm/hyp/Makefile | 3 +-
arch/arm64/kvm/hyp/entry.S | 95 +-
arch/arm64/kvm/hyp/hyp-entry.S | 107 +-
arch/arm64/kvm/hyp/include/hyp/debug-sr.h | 4 +-
arch/arm64/kvm/hyp/include/hyp/switch.h | 48 +-
arch/arm64/kvm/hyp/nvhe/.gitignore | 2 +
arch/arm64/kvm/hyp/nvhe/Makefile | 62 +-
arch/arm64/kvm/hyp/nvhe/host.S | 187 +++
arch/arm64/kvm/hyp/nvhe/hyp-init.S | 67 +-
arch/arm64/kvm/hyp/nvhe/hyp-main.c | 117 ++
arch/arm64/kvm/hyp/nvhe/hyp.lds.S | 19 +
arch/arm64/kvm/hyp/nvhe/switch.c | 52 +-
arch/arm64/kvm/hyp/nvhe/tlb.c | 2 -
arch/arm64/kvm/hyp/pgtable.c | 892 +++++++++++++++
arch/arm64/kvm/hyp/vhe/switch.c | 35 +-
arch/arm64/kvm/hyp/vhe/sysreg-sr.c | 4 +-
arch/arm64/kvm/hypercalls.c | 33 +-
arch/arm64/kvm/inject_fault.c | 1 +
arch/arm64/kvm/mmu.c | 1759 +++++------------------------
arch/arm64/kvm/pmu-emul.c | 195 +++-
arch/arm64/kvm/pmu.c | 13 +-
arch/arm64/kvm/psci.c | 74 +-
arch/arm64/kvm/pvtime.c | 29 +-
arch/arm64/kvm/reset.c | 44 +-
arch/arm64/kvm/sys_regs.c | 8 +-
arch/arm64/kvm/trace_arm.h | 16 +-
arch/arm64/kvm/trace_handle_exit.h | 6 +-
arch/arm64/kvm/vgic/vgic-debug.c | 24 +-
arch/arm64/kvm/vgic/vgic-v3.c | 4 +-
arch/x86/kvm/x86.c | 3 +
include/kvm/arm_pmu.h | 5 +
include/linux/arm-smccc.h | 74 +-
include/linux/kvm_host.h | 31 +-
include/uapi/linux/kvm.h | 1 +
71 files changed, 3658 insertions(+), 3576 deletions(-)
create mode 100644 arch/arm64/include/asm/hyp_image.h
create mode 100644 arch/arm64/include/asm/kvm_pgtable.h
create mode 100644 arch/arm64/include/asm/spectre.h
create mode 100644 arch/arm64/kernel/proton-pack.c
delete mode 100644 arch/arm64/kernel/ssbd.c
delete mode 100644 arch/arm64/kvm/hyp.S
create mode 100644 arch/arm64/kvm/hyp/nvhe/.gitignore
create mode 100644 arch/arm64/kvm/hyp/nvhe/host.S
create mode 100644 arch/arm64/kvm/hyp/nvhe/hyp-main.c
create mode 100644 arch/arm64/kvm/hyp/nvhe/hyp.lds.S
create mode 100644 arch/arm64/kvm/hyp/pgtable.c
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