mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
- Proper emulation of the OSLock feature of the debug architecture - Scalibility improvements for the MMU lock when dirty logging is on - New VMID allocator, which will eventually help with SVA in VMs - Better support for PMUs in heterogenous systems - PSCI 1.1 support, enabling support for SYSTEM_RESET2 - Implement CONFIG_DEBUG_LIST at EL2 - Make CONFIG_ARM64_ERRATUM_2077057 default y - Reduce the overhead of VM exit when no interrupt is pending - Remove traces of 32bit ARM host support from the documentation - Updated vgic selftests - Various cleanups, doc updates and spelling fixes RISC-V: - Prevent KVM_COMPAT from being selected - Optimize __kvm_riscv_switch_to() implementation - RISC-V SBI v0.3 support s390: - memop selftest - fix SCK locking - adapter interruptions virtualization for secure guests - add Claudio Imbrenda as maintainer - first step to do proper storage key checking x86: - Continue switching kvm_x86_ops to static_call(); introduce static_call_cond() and __static_call_ret0 when applicable. - Cleanup unused arguments in several functions - Synthesize AMD 0x80000021 leaf - Fixes and optimization for Hyper-V sparse-bank hypercalls - Implement Hyper-V's enlightened MSR bitmap for nested SVM - Remove MMU auditing - Eager splitting of page tables (new aka "TDP" MMU only) when dirty page tracking is enabled - Cleanup the implementation of the guest PGD cache - Preparation for the implementation of Intel IPI virtualization - Fix some segment descriptor checks in the emulator - Allow AMD AVIC support on systems with physical APIC ID above 255 - Better API to disable virtualization quirks - Fixes and optimizations for the zapping of page tables: - Zap roots in two passes, avoiding RCU read-side critical sections that last too long for very large guests backed by 4 KiB SPTEs. - Zap invalid and defunct roots asynchronously via concurrency-managed work queue. - Allowing yielding when zapping TDP MMU roots in response to the root's last reference being put. - Batch more TLB flushes with an RCU trick. Whoever frees the paging structure now holds RCU as a proxy for all vCPUs running in the guest, i.e. to prolongs the grace period on their behalf. It then kicks the the vCPUs out of guest mode before doing rcu_read_unlock(). Generic: - Introduce __vcalloc and use it for very large allocations that need memcg accounting -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmI4fdwUHHBib256aW5p QHJlZGhhdC5jb20ACgkQv/vSX3jHroMq8gf/WoeVHtw2QlL5Mmz6McvRRmPAYPLV wLUIFNrRqRvd8Tw4kivzZoh/xTpwmnojv0YdK5SjKAiMjgv094YI1LrNp1JSPvmL pitocMkA10RSJNWHeEMg9cMSKH0rKiqeYl6S1e2XsdB+UZZ2BINOCVtvglmjTAvJ dFBdKdBkqjAUZbdXAGIvz4JEEER3N/LkFDKGaUGX+0QIQOzGBPIyLTxynxIDG6mt RViCCFyXdy5NkVp5hZFm96vQ2qAlWL9B9+iKruQN++82+oqWbeTdSqPhdwF7GyFz BfOv3gobQ2c4ef/aMLO5LswZ9joI1t/4kQbbAn6dNybpOAz/NXfDnbNefg== =keox -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull kvm updates from Paolo Bonzini: "ARM: - Proper emulation of the OSLock feature of the debug architecture - Scalibility improvements for the MMU lock when dirty logging is on - New VMID allocator, which will eventually help with SVA in VMs - Better support for PMUs in heterogenous systems - PSCI 1.1 support, enabling support for SYSTEM_RESET2 - Implement CONFIG_DEBUG_LIST at EL2 - Make CONFIG_ARM64_ERRATUM_2077057 default y - Reduce the overhead of VM exit when no interrupt is pending - Remove traces of 32bit ARM host support from the documentation - Updated vgic selftests - Various cleanups, doc updates and spelling fixes RISC-V: - Prevent KVM_COMPAT from being selected - Optimize __kvm_riscv_switch_to() implementation - RISC-V SBI v0.3 support s390: - memop selftest - fix SCK locking - adapter interruptions virtualization for secure guests - add Claudio Imbrenda as maintainer - first step to do proper storage key checking x86: - Continue switching kvm_x86_ops to static_call(); introduce static_call_cond() and __static_call_ret0 when applicable. - Cleanup unused arguments in several functions - Synthesize AMD 0x80000021 leaf - Fixes and optimization for Hyper-V sparse-bank hypercalls - Implement Hyper-V's enlightened MSR bitmap for nested SVM - Remove MMU auditing - Eager splitting of page tables (new aka "TDP" MMU only) when dirty page tracking is enabled - Cleanup the implementation of the guest PGD cache - Preparation for the implementation of Intel IPI virtualization - Fix some segment descriptor checks in the emulator - Allow AMD AVIC support on systems with physical APIC ID above 255 - Better API to disable virtualization quirks - Fixes and optimizations for the zapping of page tables: - Zap roots in two passes, avoiding RCU read-side critical sections that last too long for very large guests backed by 4 KiB SPTEs. - Zap invalid and defunct roots asynchronously via concurrency-managed work queue. - Allowing yielding when zapping TDP MMU roots in response to the root's last reference being put. - Batch more TLB flushes with an RCU trick. Whoever frees the paging structure now holds RCU as a proxy for all vCPUs running in the guest, i.e. to prolongs the grace period on their behalf. It then kicks the the vCPUs out of guest mode before doing rcu_read_unlock(). Generic: - Introduce __vcalloc and use it for very large allocations that need memcg accounting" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (246 commits) KVM: use kvcalloc for array allocations KVM: x86: Introduce KVM_CAP_DISABLE_QUIRKS2 kvm: x86: Require const tsc for RT KVM: x86: synthesize CPUID leaf 0x80000021h if useful KVM: x86: add support for CPUID leaf 0x80000021 KVM: x86: do not use KVM_X86_OP_OPTIONAL_RET0 for get_mt_mask Revert "KVM: x86/mmu: Zap only TDP MMU leafs in kvm_zap_gfn_range()" kvm: x86/mmu: Flush TLB before zap_gfn_range releases RCU KVM: arm64: fix typos in comments KVM: arm64: Generalise VM features into a set of flags KVM: s390: selftests: Add error memop tests KVM: s390: selftests: Add more copy memop tests KVM: s390: selftests: Add named stages for memop test KVM: s390: selftests: Add macro as abstraction for MEM_OP KVM: s390: selftests: Split memop tests KVM: s390x: fix SCK locking RISC-V: KVM: Implement SBI HSM suspend call RISC-V: KVM: Add common kvm_riscv_vcpu_wfi() function RISC-V: Add SBI HSM suspend related defines RISC-V: KVM: Implement SBI v0.3 SRST extension ...
457 lines
12 KiB
C
457 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef ARCH_X86_KVM_X86_H
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#define ARCH_X86_KVM_X86_H
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#include <linux/kvm_host.h>
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#include <asm/mce.h>
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#include <asm/pvclock.h>
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#include "kvm_cache_regs.h"
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#include "kvm_emulate.h"
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void kvm_spurious_fault(void);
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#define KVM_NESTED_VMENTER_CONSISTENCY_CHECK(consistency_check) \
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({ \
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bool failed = (consistency_check); \
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if (failed) \
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trace_kvm_nested_vmenter_failed(#consistency_check, 0); \
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failed; \
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})
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#define KVM_DEFAULT_PLE_GAP 128
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#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
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#define KVM_DEFAULT_PLE_WINDOW_GROW 2
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#define KVM_DEFAULT_PLE_WINDOW_SHRINK 0
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#define KVM_VMX_DEFAULT_PLE_WINDOW_MAX UINT_MAX
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#define KVM_SVM_DEFAULT_PLE_WINDOW_MAX USHRT_MAX
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#define KVM_SVM_DEFAULT_PLE_WINDOW 3000
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static inline unsigned int __grow_ple_window(unsigned int val,
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unsigned int base, unsigned int modifier, unsigned int max)
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{
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u64 ret = val;
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if (modifier < 1)
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return base;
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if (modifier < base)
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ret *= modifier;
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else
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ret += modifier;
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return min(ret, (u64)max);
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}
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static inline unsigned int __shrink_ple_window(unsigned int val,
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unsigned int base, unsigned int modifier, unsigned int min)
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{
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if (modifier < 1)
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return base;
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if (modifier < base)
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val /= modifier;
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else
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val -= modifier;
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return max(val, min);
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}
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#define MSR_IA32_CR_PAT_DEFAULT 0x0007040600070406ULL
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void kvm_service_local_tlb_flush_requests(struct kvm_vcpu *vcpu);
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int kvm_check_nested_events(struct kvm_vcpu *vcpu);
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static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu)
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{
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vcpu->arch.exception.pending = false;
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vcpu->arch.exception.injected = false;
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}
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static inline void kvm_queue_interrupt(struct kvm_vcpu *vcpu, u8 vector,
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bool soft)
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{
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vcpu->arch.interrupt.injected = true;
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vcpu->arch.interrupt.soft = soft;
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vcpu->arch.interrupt.nr = vector;
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}
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static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu)
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{
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vcpu->arch.interrupt.injected = false;
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}
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static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.exception.injected || vcpu->arch.interrupt.injected ||
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vcpu->arch.nmi_injected;
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}
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static inline bool kvm_exception_is_soft(unsigned int nr)
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{
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return (nr == BP_VECTOR) || (nr == OF_VECTOR);
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}
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static inline bool is_protmode(struct kvm_vcpu *vcpu)
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{
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return kvm_read_cr0_bits(vcpu, X86_CR0_PE);
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}
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static inline int is_long_mode(struct kvm_vcpu *vcpu)
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{
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#ifdef CONFIG_X86_64
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return vcpu->arch.efer & EFER_LMA;
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#else
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return 0;
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#endif
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}
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static inline bool is_64_bit_mode(struct kvm_vcpu *vcpu)
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{
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int cs_db, cs_l;
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WARN_ON_ONCE(vcpu->arch.guest_state_protected);
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if (!is_long_mode(vcpu))
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return false;
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static_call(kvm_x86_get_cs_db_l_bits)(vcpu, &cs_db, &cs_l);
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return cs_l;
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}
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static inline bool is_64_bit_hypercall(struct kvm_vcpu *vcpu)
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{
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/*
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* If running with protected guest state, the CS register is not
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* accessible. The hypercall register values will have had to been
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* provided in 64-bit mode, so assume the guest is in 64-bit.
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*/
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return vcpu->arch.guest_state_protected || is_64_bit_mode(vcpu);
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}
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static inline bool x86_exception_has_error_code(unsigned int vector)
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{
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static u32 exception_has_error_code = BIT(DF_VECTOR) | BIT(TS_VECTOR) |
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BIT(NP_VECTOR) | BIT(SS_VECTOR) | BIT(GP_VECTOR) |
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BIT(PF_VECTOR) | BIT(AC_VECTOR);
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return (1U << vector) & exception_has_error_code;
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}
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static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
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}
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static inline int is_pae(struct kvm_vcpu *vcpu)
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{
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return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);
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}
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static inline int is_pse(struct kvm_vcpu *vcpu)
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{
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return kvm_read_cr4_bits(vcpu, X86_CR4_PSE);
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}
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static inline int is_paging(struct kvm_vcpu *vcpu)
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{
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return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG));
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}
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static inline bool is_pae_paging(struct kvm_vcpu *vcpu)
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{
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return !is_long_mode(vcpu) && is_pae(vcpu) && is_paging(vcpu);
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}
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static inline u8 vcpu_virt_addr_bits(struct kvm_vcpu *vcpu)
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{
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return kvm_read_cr4_bits(vcpu, X86_CR4_LA57) ? 57 : 48;
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}
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static inline bool is_noncanonical_address(u64 la, struct kvm_vcpu *vcpu)
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{
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return !__is_canonical_address(la, vcpu_virt_addr_bits(vcpu));
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}
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static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
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gva_t gva, gfn_t gfn, unsigned access)
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{
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u64 gen = kvm_memslots(vcpu->kvm)->generation;
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if (unlikely(gen & KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS))
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return;
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/*
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* If this is a shadow nested page table, the "GVA" is
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* actually a nGPA.
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*/
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vcpu->arch.mmio_gva = mmu_is_nested(vcpu) ? 0 : gva & PAGE_MASK;
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vcpu->arch.mmio_access = access;
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vcpu->arch.mmio_gfn = gfn;
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vcpu->arch.mmio_gen = gen;
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}
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static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation;
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}
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/*
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* Clear the mmio cache info for the given gva. If gva is MMIO_GVA_ANY, we
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* clear all mmio cache info.
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*/
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#define MMIO_GVA_ANY (~(gva_t)0)
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static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva)
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{
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if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK))
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return;
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vcpu->arch.mmio_gva = 0;
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}
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static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva)
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{
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if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva &&
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vcpu->arch.mmio_gva == (gva & PAGE_MASK))
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return true;
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return false;
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}
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static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
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{
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if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn &&
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vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT)
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return true;
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return false;
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}
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static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu, int reg)
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{
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unsigned long val = kvm_register_read_raw(vcpu, reg);
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return is_64_bit_mode(vcpu) ? val : (u32)val;
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}
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static inline void kvm_register_write(struct kvm_vcpu *vcpu,
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int reg, unsigned long val)
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{
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if (!is_64_bit_mode(vcpu))
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val = (u32)val;
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return kvm_register_write_raw(vcpu, reg, val);
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}
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static inline bool kvm_check_has_quirk(struct kvm *kvm, u64 quirk)
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{
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return !(kvm->arch.disabled_quirks & quirk);
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}
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static inline bool kvm_vcpu_latch_init(struct kvm_vcpu *vcpu)
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{
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return is_smm(vcpu) || static_call(kvm_x86_apic_init_signal_blocked)(vcpu);
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}
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void kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);
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u64 get_kvmclock_ns(struct kvm *kvm);
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int kvm_read_guest_virt(struct kvm_vcpu *vcpu,
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gva_t addr, void *val, unsigned int bytes,
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struct x86_exception *exception);
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int kvm_write_guest_virt_system(struct kvm_vcpu *vcpu,
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gva_t addr, void *val, unsigned int bytes,
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struct x86_exception *exception);
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int handle_ud(struct kvm_vcpu *vcpu);
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void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu);
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void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu);
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u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
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bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data);
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int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data);
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int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
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bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn,
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int page_num);
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bool kvm_vector_hashing_enabled(void);
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void kvm_fixup_and_inject_pf_error(struct kvm_vcpu *vcpu, gva_t gva, u16 error_code);
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int x86_decode_emulated_instruction(struct kvm_vcpu *vcpu, int emulation_type,
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void *insn, int insn_len);
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int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
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int emulation_type, void *insn, int insn_len);
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fastpath_t handle_fastpath_set_msr_irqoff(struct kvm_vcpu *vcpu);
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extern u64 host_xcr0;
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extern u64 supported_xcr0;
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extern u64 host_xss;
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extern u64 supported_xss;
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extern bool enable_pmu;
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static inline bool kvm_mpx_supported(void)
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{
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return (supported_xcr0 & (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR))
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== (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR);
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}
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extern unsigned int min_timer_period_us;
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extern bool enable_vmware_backdoor;
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extern int pi_inject_timer;
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extern bool report_ignored_msrs;
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extern bool eager_page_split;
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static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
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{
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return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult,
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vcpu->arch.virtual_tsc_shift);
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}
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/* Same "calling convention" as do_div:
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* - divide (n << 32) by base
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* - put result in n
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* - return remainder
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*/
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#define do_shl32_div32(n, base) \
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({ \
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u32 __quot, __rem; \
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asm("divl %2" : "=a" (__quot), "=d" (__rem) \
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: "rm" (base), "0" (0), "1" ((u32) n)); \
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n = __quot; \
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__rem; \
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})
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static inline bool kvm_mwait_in_guest(struct kvm *kvm)
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{
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return kvm->arch.mwait_in_guest;
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}
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static inline bool kvm_hlt_in_guest(struct kvm *kvm)
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{
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return kvm->arch.hlt_in_guest;
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}
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static inline bool kvm_pause_in_guest(struct kvm *kvm)
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{
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return kvm->arch.pause_in_guest;
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}
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static inline bool kvm_cstate_in_guest(struct kvm *kvm)
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{
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return kvm->arch.cstate_in_guest;
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}
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enum kvm_intr_type {
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/* Values are arbitrary, but must be non-zero. */
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KVM_HANDLING_IRQ = 1,
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KVM_HANDLING_NMI,
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};
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static inline void kvm_before_interrupt(struct kvm_vcpu *vcpu,
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enum kvm_intr_type intr)
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{
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WRITE_ONCE(vcpu->arch.handling_intr_from_guest, (u8)intr);
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}
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static inline void kvm_after_interrupt(struct kvm_vcpu *vcpu)
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{
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WRITE_ONCE(vcpu->arch.handling_intr_from_guest, 0);
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|
}
|
|
|
|
static inline bool kvm_handling_nmi_from_guest(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.handling_intr_from_guest == KVM_HANDLING_NMI;
|
|
}
|
|
|
|
static inline bool kvm_pat_valid(u64 data)
|
|
{
|
|
if (data & 0xF8F8F8F8F8F8F8F8ull)
|
|
return false;
|
|
/* 0, 1, 4, 5, 6, 7 are valid values. */
|
|
return (data | ((data & 0x0202020202020202ull) << 1)) == data;
|
|
}
|
|
|
|
static inline bool kvm_dr7_valid(u64 data)
|
|
{
|
|
/* Bits [63:32] are reserved */
|
|
return !(data >> 32);
|
|
}
|
|
static inline bool kvm_dr6_valid(u64 data)
|
|
{
|
|
/* Bits [63:32] are reserved */
|
|
return !(data >> 32);
|
|
}
|
|
|
|
/*
|
|
* Trigger machine check on the host. We assume all the MSRs are already set up
|
|
* by the CPU and that we still run on the same CPU as the MCE occurred on.
|
|
* We pass a fake environment to the machine check handler because we want
|
|
* the guest to be always treated like user space, no matter what context
|
|
* it used internally.
|
|
*/
|
|
static inline void kvm_machine_check(void)
|
|
{
|
|
#if defined(CONFIG_X86_MCE)
|
|
struct pt_regs regs = {
|
|
.cs = 3, /* Fake ring 3 no matter what the guest ran on */
|
|
.flags = X86_EFLAGS_IF,
|
|
};
|
|
|
|
do_machine_check(®s);
|
|
#endif
|
|
}
|
|
|
|
void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu);
|
|
void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu);
|
|
int kvm_spec_ctrl_test_value(u64 value);
|
|
bool kvm_is_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
|
|
int kvm_handle_memory_failure(struct kvm_vcpu *vcpu, int r,
|
|
struct x86_exception *e);
|
|
int kvm_handle_invpcid(struct kvm_vcpu *vcpu, unsigned long type, gva_t gva);
|
|
bool kvm_msr_allowed(struct kvm_vcpu *vcpu, u32 index, u32 type);
|
|
|
|
/*
|
|
* Internal error codes that are used to indicate that MSR emulation encountered
|
|
* an error that should result in #GP in the guest, unless userspace
|
|
* handles it.
|
|
*/
|
|
#define KVM_MSR_RET_INVALID 2 /* in-kernel MSR emulation #GP condition */
|
|
#define KVM_MSR_RET_FILTERED 3 /* #GP due to userspace MSR filter */
|
|
|
|
#define __cr4_reserved_bits(__cpu_has, __c) \
|
|
({ \
|
|
u64 __reserved_bits = CR4_RESERVED_BITS; \
|
|
\
|
|
if (!__cpu_has(__c, X86_FEATURE_XSAVE)) \
|
|
__reserved_bits |= X86_CR4_OSXSAVE; \
|
|
if (!__cpu_has(__c, X86_FEATURE_SMEP)) \
|
|
__reserved_bits |= X86_CR4_SMEP; \
|
|
if (!__cpu_has(__c, X86_FEATURE_SMAP)) \
|
|
__reserved_bits |= X86_CR4_SMAP; \
|
|
if (!__cpu_has(__c, X86_FEATURE_FSGSBASE)) \
|
|
__reserved_bits |= X86_CR4_FSGSBASE; \
|
|
if (!__cpu_has(__c, X86_FEATURE_PKU)) \
|
|
__reserved_bits |= X86_CR4_PKE; \
|
|
if (!__cpu_has(__c, X86_FEATURE_LA57)) \
|
|
__reserved_bits |= X86_CR4_LA57; \
|
|
if (!__cpu_has(__c, X86_FEATURE_UMIP)) \
|
|
__reserved_bits |= X86_CR4_UMIP; \
|
|
if (!__cpu_has(__c, X86_FEATURE_VMX)) \
|
|
__reserved_bits |= X86_CR4_VMXE; \
|
|
if (!__cpu_has(__c, X86_FEATURE_PCID)) \
|
|
__reserved_bits |= X86_CR4_PCIDE; \
|
|
__reserved_bits; \
|
|
})
|
|
|
|
int kvm_sev_es_mmio_write(struct kvm_vcpu *vcpu, gpa_t src, unsigned int bytes,
|
|
void *dst);
|
|
int kvm_sev_es_mmio_read(struct kvm_vcpu *vcpu, gpa_t src, unsigned int bytes,
|
|
void *dst);
|
|
int kvm_sev_es_string_io(struct kvm_vcpu *vcpu, unsigned int size,
|
|
unsigned int port, void *data, unsigned int count,
|
|
int in);
|
|
|
|
#endif
|