Changes in Kconfig

eded6754 - riscv: KVM: add basic support for host vs guest profiling

Tue, 15 Oct 2024 02:58:37 +0000

riscv: KVM: add basic support for host vs guest profilingFor the information collected on the host side, we need toidentify which data originates from the guest and recordthese events separately, this can be achieved by havingKVM register perf callbacks.Signed-off-by: Quan Zhou Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/00342d535311eb0629b9ba4f1e457a48e2abee33.1728957131.git.zhouquan@iscas.ac.cnSigned-off-by: Anup Patel List of files: /linux-6.15/arch/riscv/kvm/Kconfig

8886640d - kvm: replace __KVM_HAVE_READONLY_MEM with Kconfig symbol

Thu, 11 Jan 2024 08:00:34 +0000

kvm: replace __KVM_HAVE_READONLY_MEM with Kconfig symbolKVM uses __KVM_HAVE_* symbols in the architecture-dependent uapi/asm/kvm.h to maskunused definitions in include/uapi/linux/kvm.h. __KVM_HAVE_READONLY_MEM howeverwas nothing but a misguided attempt to define KVM_CAP_READONLY_MEM only onarchitectures where KVM_CHECK_EXTENSION(KVM_CAP_READONLY_MEM) could possiblyreturn nonzero. This however does not make sense, and it prevented userspacefrom supporting this architecture-independent feature without recompilation.Therefore, these days __KVM_HAVE_READONLY_MEM does not mask anything andis only used in virt/kvm/kvm_main.c. Userspace does not need to test itand there should be no need for it to exist. Remove it and replace itwith a Kconfig symbol within Linux source code.Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/riscv/kvm/Kconfig

caadf876 - KVM: introduce CONFIG_KVM_COMMON

Thu, 04 Jan 2024 16:15:07 +0000

KVM: introduce CONFIG_KVM_COMMONCONFIG_HAVE_KVM is currently used by some architectures to eitherenabled the KVM config proper, or to enable host-side code that isnot part of the KVM module. However, CONFIG_KVM's "select" statementin virt/kvm/Kconfig corresponds to a third meaning, namely toenable common Kconfigs required by all architectures that supportKVM.These three meanings can be replaced respectively by anarchitecture-specific Kconfig, by IS_ENABLED(CONFIG_KVM), or bya new Kconfig symbol that is in turn selected by thearchitecture-specific "config KVM".Start by introducing such a new Kconfig symbol, CONFIG_KVM_COMMON.Unlike CONFIG_HAVE_KVM, it is selected by CONFIG_KVM, not byarchitecture code, and it brings in all dependencies of commonKVM code. In particular, INTERVAL_TREE was missing in loongarchand riscv, so that is another thing that is fixed.Fixes: 8132d887a702 ("KVM: remove CONFIG_HAVE_KVM_EVENTFD", 2023-12-08)Reported-by: Randy Dunlap Closes: https://lore.kernel.org/all/44907c6b-c5bd-4e4a-a921-e4d3825539d8@infradead.org/Reviewed-by: Andrew Jones Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/riscv/kvm/Kconfig

e9f12b5f - RISC-V: KVM: Implement SBI STA extension

Wed, 20 Dec 2023 16:00:22 +0000

RISC-V: KVM: Implement SBI STA extensionAdd a select SCHED_INFO to the KVM config in order to get run_delayinfo. Then implement SBI STA's set-steal-time-shmem function andkvm_riscv_vcpu_record_steal_time() to provide the steal-time infoto guests.Reviewed-by: Anup Patel Reviewed-by: Atish Patra Signed-off-by: Andrew Jones Signed-off-by: Anup Patel List of files: /linux-6.15/arch/riscv/kvm/Kconfig

c5b31cc2 - KVM: remove CONFIG_HAVE_KVM_IRQFD

Wed, 18 Oct 2023 16:07:32 +0000

KVM: remove CONFIG_HAVE_KVM_IRQFDAll platforms with a kernel irqchip have support for irqfd. Unify thetwo configuration items so that userspace can expect to use irqfd toinject interrupts into the irqchip.Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/riscv/kvm/Kconfig

8132d887 - KVM: remove CONFIG_HAVE_KVM_EVENTFD

Wed, 18 Oct 2023 16:11:56 +0000

KVM: remove CONFIG_HAVE_KVM_EVENTFDvirt/kvm/eventfd.c is compiled unconditionally, meaning that the ioeventfdsmember of struct kvm is accessed unconditionally. CONFIG_HAVE_KVM_EVENTFDtherefore must be defined for KVM common code to compile successfully,remove it.Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/riscv/kvm/Kconfig

f128cf8c - KVM: Convert KVM_ARCH_WANT_MMU_NOTIFIER to CONFIG_KVM_GENERIC_MMU_NOTIFIER

Fri, 27 Oct 2023 18:21:49 +0000

KVM: Convert KVM_ARCH_WANT_MMU_NOTIFIER to CONFIG_KVM_GENERIC_MMU_NOTIFIERConvert KVM_ARCH_WANT_MMU_NOTIFIER into a Kconfig and select it whereappropriate to effectively maintain existing behavior. Using a properKconfig will simplify building more functionality on top of KVM'smmu_notifier infrastructure.Add a forward declaration of kvm_gfn_range to kvm_types.h so thatincluding arch/powerpc/include/asm/kvm_ppc.h's with CONFIG_KVM=n doesn'tgenerate warnings due to kvm_gfn_range being undeclared. PPC defineshooks for PR vs. HV without guarding them via #ifdeffery, e.g. bool (*unmap_gfn_range)(struct kvm *kvm, struct kvm_gfn_range *range); bool (*age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range); bool (*test_age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range); bool (*set_spte_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);Alternatively, PPC could forward declare kvm_gfn_range, but there's nogood reason not to define it in common KVM.Acked-by: Anup Patel Signed-off-by: Sean Christopherson Reviewed-by: Paolo Bonzini Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba Message-Id: <20231027182217.3615211-8-seanjc@google.com>Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/riscv/kvm/Kconfig

00f918f6 - RISC-V: KVM: Skeletal in-kernel AIA irqchip support

Thu, 15 Jun 2023 07:33:48 +0000

RISC-V: KVM: Skeletal in-kernel AIA irqchip supportTo incrementally implement in-kernel AIA irqchip support, we firstadd minimal skeletal support which only compiles but does not provideany functionality.Signed-off-by: Anup Patel Reviewed-by: Atish Patra Signed-off-by: Anup Patel List of files: /linux-6.15/arch/riscv/kvm/Kconfig

c69daf8b - RISC-V: KVM: Alphabetize selects

Wed, 22 Mar 2023 19:28:57 +0000

RISC-V: KVM: Alphabetize selectsWhile alphabetized lists tend to become unalphabetized almostas quickly as they get fixed up, it is preferred to keep selectlists in Kconfigs in order. Let's fix KVM's up.Signed-off-by: Andrew Jones Reviewed-by: Anup Patel Signed-off-by: Anup Patel List of files: /linux-6.15/arch/riscv/kvm/Kconfig

79cf833b - kvm: Remove "select SRCU"

Fri, 24 Mar 2023 20:52:47 +0000

kvm: Remove "select SRCU"Now that the SRCU Kconfig option is unconditionally selected, there isno longer any point in selecting it. Therefore, remove the "select SRCU"Kconfig statements from the various KVM Kconfig files.Acked-by: Sean Christopherson (x86)Signed-off-by: Paul E. McKenney Cc: Huacai Chen Cc: Aleksandar Markovic Cc: Thomas Bogendoerfer Cc: Michael Ellerman Cc: Christophe Leroy Cc: Sean Christopherson Cc: Paolo Bonzini Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" Cc: Acked-by: Marc Zyngier (arm64)Acked-by: Michael Ellerman (powerpc)Acked-by: Anup Patel (riscv)Acked-by: Heiko Carstens (s390)Reviewed-by: John Ogness Signed-off-by: Joel Fernandes (Google) List of files: /linux-6.15/arch/riscv/kvm/Kconfig

441f7bfa - KVM: Opt out of generic hardware enabling on s390 and PPC

Wed, 30 Nov 2022 23:09:33 +0000

KVM: Opt out of generic hardware enabling on s390 and PPCAllow architectures to opt out of the generic hardware enabling logic,and opt out on both s390 and PPC, which don't need to manually enablevirtualization as it's always on (when available).In addition to letting s390 and PPC drop a bit of dead code, this willhopefully also allow ARM to clean up its related code, e.g. ARM has itsown per-CPU flag to track which CPUs have enable hardware due to theneed to keep hardware enabled indefinitely when pKVM is enabled.Signed-off-by: Sean Christopherson Acked-by: Anup Patel Message-Id: <20221130230934.1014142-50-seanjc@google.com>Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/riscv/kvm/Kconfig

9c00fbdd - RISC-V: KVM: Use generic guest entry infrastructure

Sun, 02 Oct 2022 04:49:25 +0000

RISC-V: KVM: Use generic guest entry infrastructureUse generic guest entry infrastructure to properly handleTIF_NOTIFY_RESUME.Signed-off-by: Jisheng Zhang Reviewed-by: Andrew Jones Signed-off-by: Anup Patel List of files: /linux-6.15/arch/riscv/kvm/Kconfig

9b4eb770 - riscv: do not select non-existing config ANON_INODES

Fri, 22 Oct 2021 06:15:14 +0000

riscv: do not select non-existing config ANON_INODESCommit 99cdc6c18c2d ("RISC-V: Add initial skeletal KVM support") selectsthe config ANON_INODES in config KVM, but the config ANON_INODES is removedsince commit 5dd50aaeb185 ("Make anon_inodes unconditional") in 2018.Hence, ./scripts/checkkconfigsymbols.py warns on non-existing symbols: ANON_INODES Referencing files: arch/riscv/kvm/KconfigRemove selecting the non-existing config ANON_INODES.Signed-off-by: Lukas Bulwahn Message-Id: <20211022061514.25946-1-lukas.bulwahn@gmail.com>Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/riscv/kvm/Kconfig

9955371c - RISC-V: KVM: Implement MMU notifiers

Mon, 27 Sep 2021 11:40:10 +0000

RISC-V: KVM: Implement MMU notifiersThis patch implements MMU notifiers for KVM RISC-V so that Guestphysical address space is in-sync with Host physical address space.This will allow swapping, page migration, etc to work transparentlywith KVM RISC-V.Signed-off-by: Anup Patel Acked-by: Paolo Bonzini Reviewed-by: Paolo Bonzini Reviewed-by: Alexander Graf Acked-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kvm/Kconfig

9d05c1fe - RISC-V: KVM: Implement stage2 page table programming

Mon, 27 Sep 2021 11:40:09 +0000

RISC-V: KVM: Implement stage2 page table programmingThis patch implements all required functions for programmingthe stage2 page table for each Guest/VM.At high-level, the flow of stage2 related functions is similarfrom KVM ARM/ARM64 implementation but the stage2 page tableformat is quite different for KVM RISC-V.[jiangyifei: stage2 dirty log support]Signed-off-by: Yifei Jiang Signed-off-by: Anup Patel Acked-by: Paolo Bonzini Reviewed-by: Paolo Bonzini Acked-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kvm/Kconfig

9f701326 - RISC-V: KVM: Handle MMIO exits for VCPU

Mon, 27 Sep 2021 11:40:06 +0000

RISC-V: KVM: Handle MMIO exits for VCPUWe will get stage2 page faults whenever Guest/VM access SW emulatedMMIO device or unmapped Guest RAM.This patch implements MMIO read/write emulation by extracting MMIOdetails from the trapped load/store instruction and forwarding theMMIO read/write to user-space. The actual MMIO emulation will happenin user-space and KVM kernel module will only take care of registerupdates before resuming the trapped VCPU.The handling for stage2 page faults for unmapped Guest RAM will beimplemeted by a separate patch later.[jiangyifei: ioeventfd and in-kernel mmio device support]Signed-off-by: Yifei Jiang Signed-off-by: Anup Patel Acked-by: Paolo Bonzini Reviewed-by: Paolo Bonzini Reviewed-by: Alexander Graf Acked-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kvm/Kconfig

99cdc6c1 - RISC-V: Add initial skeletal KVM support

Mon, 27 Sep 2021 11:40:01 +0000

RISC-V: Add initial skeletal KVM supportThis patch adds initial skeletal KVM RISC-V support which has:1. A simple implementation of arch specific VM functions except kvm_vm_ioctl_get_dirty_log() which will implemeted in-future as part of stage2 page loging.2. Stubs of required arch specific VCPU functions except kvm_arch_vcpu_ioctl_run() which is semi-complete and extended by subsequent patches.3. Stubs for required arch specific stage2 MMU functions.Signed-off-by: Anup Patel Acked-by: Paolo Bonzini Reviewed-by: Paolo Bonzini Reviewed-by: Alexander Graf Acked-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kvm/Kconfig