Changes in Makefile

96c2f033 - KVM: arm64: nv: Plumb handling of GICv3 EL2 accesses

Tue, 25 Feb 2025 17:29:20 +0000

KVM: arm64: nv: Plumb handling of GICv3 EL2 accessesWire the handling of all GICv3 EL2 registers, and provide emulationfor all the non memory-backed registers (ICC_SRE_EL2, ICH_VTR_EL2,ICH_MISR_EL2, ICH_ELRSR_EL2, and ICH_EISR_EL2).Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20250225172930.1850838-7-maz@kernel.orgSigned-off-by: Oliver Upton List of files: /linux-6.15/arch/arm64/kvm/Makefile

7c4f7354 - KVM: arm64: Register ptdump with debugfs on guest creation

Mon, 09 Sep 2024 12:47:21 +0000

KVM: arm64: Register ptdump with debugfs on guest creationWhile arch/*/mem/ptdump handles the kernel pagetable dumping code,introduce KVM/ptdump to show the guest stage-2 pagetables. Theseparation is necessary because most of the definitions from thestage-2 pagetable reside in the KVM path and we will be invokingfunctionality specific to KVM. Introduce the PTDUMP_STAGE2_DEBUGFS config.When a guest is created, register a new file entry under the guestdebugfs dir which allows userspace to show the contents of the gueststage-2 pagetables when accessed.[maz: moved function prototypes from kvm_host.h to kvm_mmu.h]Signed-off-by: Sebastian Ene Reviewed-by: Vincent Donnefort Link: https://lore.kernel.org/r/20240909124721.1672199-6-sebastianene@google.comSigned-off-by: Marc Zyngier List of files: /linux-6.15/arch/arm64/kvm/Makefile

477e89ca - KVM: arm64: nv: Add basic emulation of AT S1E{0,1}{R,W}

Wed, 19 Jun 2024 07:29:20 +0000

KVM: arm64: nv: Add basic emulation of AT S1E{0,1}{R,W}Emulating AT instructions is one the tasks devolved to the hosthypervisor when NV is on.Here, we take the basic approach of emulating AT S1E{0,1}{R,W}using the AT instructions themselves. While this mostly work,it doesn't *always* work:- S1 page tables can be swapped out- shadow S2 can be incomplete and not contain mappings for the S1 page tablesWe are not trying to handle these case here, and defer it toa later patch. Suitable comments indicate where we are in direneed of better handling.Co-developed-by: Jintack Lim Signed-off-by: Jintack Lim Signed-off-by: Marc Zyngier List of files: /linux-6.15/arch/arm64/kvm/Makefile

963a08e5 - KVM: arm64: fix override-init warnings in W=1 builds

Tue, 23 Jul 2024 10:12:02 +0000

KVM: arm64: fix override-init warnings in W=1 buildsAdd -Wno-override-init to the build flags for sys_regs.c,handle_exit.c, and switch.c to fix warnings like the following:arch/arm64/kvm/hyp/vhe/switch.c:271:43: warning: initialized field overwritten [-Woverride-init] 271 | [ESR_ELx_EC_CP15_32] = kvm_hyp_handle_cp15_32, |Signed-off-by: Sebastian Ott Reviewed-by: Marc Zyngier Link: https://lore.kernel.org/r/20240723101204.7356-2-sebott@redhat.comSigned-off-by: Oliver Upton List of files: /linux-6.15/arch/arm64/kvm/Makefile

b1992c37 - kbuild: use $(src) instead of $(srctree)/$(src) for source directory

Sat, 27 Apr 2024 14:55:02 +0000

kbuild: use $(src) instead of $(srctree)/$(src) for source directoryKbuild conventionally uses $(obj)/ for generated files, and $(src)/ forchecked-in source files. It is merely a convention without any functionaldifference. In fact, $(obj) and $(src) are exactly the same, as definedin scripts/Makefile.build: src := $(obj)When the kernel is built in a separate output directory, $(src) doesnot accurately reflect the source directory location. While Kbuildresolves this discrepancy by specifying VPATH=$(srctree) to search forsource files, it does not cover all cases. For example, when adding aheader search path for local headers, -I$(srctree)/$(src) is typicallypassed to the compiler.This introduces inconsistency between upstream and downstream Makefilesbecause $(src) is used instead of $(srctree)/$(src) for the latter.To address this inconsistency, this commit changes the semantics of$(src) so that it always points to the directory in the source tree.Going forward, the variables used in Makefiles will have the followingmeanings: $(obj) - directory in the object tree $(src) - directory in the source tree (changed by this commit) $(objtree) - the top of the kernel object tree $(srctree) - the top of the kernel source treeConsequently, $(srctree)/$(src) in upstream Makefiles need to be replacedwith $(src).Signed-off-by: Masahiro Yamada Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/arm64/kvm/Makefile

6ccc971e - KVM: arm64: nv: Add emulation for ERETAx instructions

Fri, 19 Apr 2024 10:29:32 +0000

KVM: arm64: nv: Add emulation for ERETAx instructionsFEAT_NV has the interesting property of relying on ERET beingtrapped. An added complexity is that it also traps ERETAA andERETAB, meaning that the Pointer Authentication aspect of theseinstruction must be emulated.Add an emulation of Pointer Authentication, limited to ERETAx(always using SP_EL2 as the modifier and ELR_EL2 as the pointer),using the Generic Authentication instructions.The emulation, however small, is placed in its own compilationunit so that it can be avoided if the configuration doesn'tinclude it (or the toolchan in not up to the task).Reviewed-by: Joey Gouly Reviewed-by: Oliver Upton Link: https://lore.kernel.org/r/20240419102935.1935571-13-maz@kernel.orgSigned-off-by: Marc Zyngier List of files: /linux-6.15/arch/arm64/kvm/Makefile

9f75b6d4 - KVM: arm64: nv: Filter out unsupported features from ID regs

Thu, 09 Feb 2023 17:58:19 +0000

KVM: arm64: nv: Filter out unsupported features from ID regsAs there is a number of features that we either can't support,or don't want to support right away with NV, let's add somebasic filtering so that we don't advertize silly things to theEL2 guest.Whilst we are at it, advertize FEAT_TTL as well as FEAT_GTG, whichthe NV implementation will implement.Reviewed-by: Ganapatrao Kulkarni Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20230209175820.1939006-18-maz@kernel.orgSigned-off-by: Oliver Upton List of files: /linux-6.15/arch/arm64/kvm/Makefile

47f3a2fc - KVM: arm64: nv: Support virtual EL2 exceptions

Thu, 09 Feb 2023 17:58:11 +0000

KVM: arm64: nv: Support virtual EL2 exceptionsSupport injecting exceptions and performing exception returns to andfrom virtual EL2. This must be done entirely in software except whentaking an exception from vEL0 to vEL2 when the virtual HCR_EL2.{E2H,TGE}== {1,1} (a VHE guest hypervisor).[maz: switch to common exception injection framework, illegal exeption return handling]Reviewed-by: Ganapatrao Kulkarni Signed-off-by: Jintack Lim Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20230209175820.1939006-10-maz@kernel.orgSigned-off-by: Oliver Upton List of files: /linux-6.15/arch/arm64/kvm/Makefile

9f5fee05 - KVM: arm64: Move nVHE stacktrace unwinding into its own compilation unit

Wed, 27 Jul 2022 14:29:02 +0000

KVM: arm64: Move nVHE stacktrace unwinding into its own compilation unitThe unwinding code doesn't really belong to the exit handlingcode. Instead, move it to a file (conveniently named stacktrace.cto confuse the reviewer), and move all the stacktrace-relatedstuff there.It will be joined by more code very soon.Signed-off-by: Marc Zyngier Reviewed-by: Kalesh Singh Tested-by: Kalesh Singh Reviewed-by: Oliver Upton Link: https://lore.kernel.org/r/20220727142906.1856759-3-maz@kernel.org List of files: /linux-6.15/arch/arm64/kvm/Makefile

20492a62 - KVM: arm64: pmu: Restore compilation when HW_PERF_EVENTS isn't selected

Mon, 16 May 2022 12:02:24 +0000

KVM: arm64: pmu: Restore compilation when HW_PERF_EVENTS isn't selectedMoving kvm_pmu_events into the vcpu (and refering to it) broke thesomewhat unusual case where the kernel has no support for a PMUat all.In order to solve this, move things around a bit so that we caneasily avoid refering to the pmu structure outside of PMU-awarecode. As a bonus, pmu.c isn't compiled in when HW_PERF_EVENTSisn't selected.Reported-by: kernel test robot Reviewed-by: Fuad Tabba Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/202205161814.KQHpOzsJ-lkp@intel.com List of files: /linux-6.15/arch/arm64/kvm/Makefile

3248136b - KVM: arm64: Align the VMID allocation with the arm64 ASID

Mon, 22 Nov 2021 12:18:43 +0000

KVM: arm64: Align the VMID allocation with the arm64 ASIDAt the moment, the VMID algorithm will send an SGI to all theCPUs to force an exit and then broadcast a full TLB flush andI-Cache invalidation.This patch uses the new VMID allocator. The benefits are: - Aligns with arm64 ASID algorithm. - CPUs are not forced to exit at roll-over. Instead, the VMID will be marked reserved and context invalidation is broadcasted. This will reduce the IPIs traffic. - More flexible to add support for pinned KVM VMIDs in the future. With the new algo, the code is now adapted: - The call to update_vmid() will be done with preemption disabled as the new algo requires to store information per-CPU.Signed-off-by: Julien Grall Signed-off-by: Shameer Kolothum Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211122121844.867-4-shameerali.kolothum.thodi@huawei.com List of files: /linux-6.15/arch/arm64/kvm/Makefile

d8f6ef45 - KVM: arm64: Use Makefile.kvm for common files

Sun, 21 Nov 2021 12:54:46 +0000

KVM: arm64: Use Makefile.kvm for common filesSigned-off-by: David Woodhouse Acked-by: Marc Zyngier Message-Id: <20211121125451.9489-8-dwmw2@infradead.org>Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/arm64/kvm/Makefile

9429f4b0 - KVM: arm64: Move host EL1 code out of hyp/ directory

Thu, 02 Dec 2021 17:10:48 +0000

KVM: arm64: Move host EL1 code out of hyp/ directorykvm/hyp/reserved_mem.c contains host code executing at EL1 and is notlinked into the hypervisor object. Move the file into kvm/pkvm.c andrework the headers so that the definitions shared between the host andthe hypervisor live in asm/kvm_pkvm.h.Signed-off-by: Will Deacon Tested-by: Fuad Tabba Reviewed-by: Fuad Tabba Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211202171048.26924-4-will@kernel.org List of files: /linux-6.15/arch/arm64/kvm/Makefile

ed4ed15d - KVM: arm64: Generate hyp_constants.h for the host

Thu, 02 Dec 2021 17:10:47 +0000

KVM: arm64: Generate hyp_constants.h for the hostIn order to avoid exposing hypervisor (EL2) data structures directly tothe host, generate hyp_constants.h to provide constants such as structuresizes to the host without dragging in the definitions themselves.Signed-off-by: Will Deacon Tested-by: Fuad Tabba Reviewed-by: Fuad Tabba Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211202171048.26924-3-will@kernel.org List of files: /linux-6.15/arch/arm64/kvm/Makefile

17ed14eb - KVM: arm64: Drop perf.c and fold its tiny bits of code into arm.c

Thu, 11 Nov 2021 02:07:37 +0000

KVM: arm64: Drop perf.c and fold its tiny bits of code into arm.cCall KVM's (un)register perf callbacks helpers directly from arm.c anddelete perf.cNo functional change intended.Signed-off-by: Sean Christopherson Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20211111020738.2512932-17-seanjc@google.com List of files: /linux-6.15/arch/arm64/kvm/Makefile

cb082bfa - KVM: stats: Add fd-based API to read binary stats data

Fri, 18 Jun 2021 22:27:04 +0000

KVM: stats: Add fd-based API to read binary stats dataThis commit defines the API for userspace and prepare the commonfunctionalities to support per VM/VCPU binary stats data readings.The KVM stats now is only accessible by debugfs, which has someshortcomings this change series are supposed to fix:1. The current debugfs stats solution in KVM could be disabled when kernel Lockdown mode is enabled, which is a potential rick for production.2. The current debugfs stats solution in KVM is organized as "one stats per file", it is good for debugging, but not efficient for production.3. The stats read/clear in current debugfs solution in KVM are protected by the global kvm_lock.Besides that, there are some other benefits with this change:1. All KVM VM/VCPU stats can be read out in a bulk by one copy to userspace.2. A schema is used to describe KVM statistics. From userspace's perspective, the KVM statistics are self-describing.3. With the fd-based solution, a separate telemetry would be able to read KVM stats in a less privileged environment.4. After the initial setup by reading in stats descriptors, a telemetry only needs to read the stats data itself, no more parsing or setup is needed.Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Reviewed-by: Krish Sadhukhan Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba #arm64Signed-off-by: Jing Zhang Message-Id: <20210618222709.1858088-3-jingzhangos@google.com>Signed-off-by: Paolo Bonzini List of files: /linux-6.15/arch/arm64/kvm/Makefile

a8e190cd - KVM: arm64: Implement the TRNG hypervisor call

Wed, 06 Jan 2021 10:34:53 +0000

KVM: arm64: Implement the TRNG hypervisor callProvide a hypervisor implementation of the ARM architected TRNG firmwareinterface described in ARM spec DEN0098. All function IDs are implemented,including both 32-bit and 64-bit versions of the TRNG_RND service, whichis the centerpiece of the API.The API is backed by the kernel's entropy pool only, to avoid guestsdraining more precious direct entropy sources.Signed-off-by: Ard Biesheuvel [Andre: minor fixes, drop arch_get_random() usage]Signed-off-by: Andre Przywara Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210106103453.152275-6-andre.przywara@arm.com List of files: /linux-6.15/arch/arm64/kvm/Makefile

8cbebc41 - KVM: arm64: Replace KVM_ARM_PMU with HW_PERF_EVENTS

Mon, 04 Jan 2021 16:50:16 +0000

KVM: arm64: Replace KVM_ARM_PMU with HW_PERF_EVENTSKVM_ARM_PMU only existed for the benefit of 32bit ARM hosts,and makes no sense now that we are 64bit only. Get rid of it.Signed-off-by: Marc Zyngier List of files: /linux-6.15/arch/arm64/kvm/Makefile

90c1f934 - KVM: arm64: Get rid of the AArch32 register mapping code

Fri, 16 Oct 2020 17:41:24 +0000

KVM: arm64: Get rid of the AArch32 register mapping codeThe only use of the register mapping code was for the sake of the LRmapping, which we trivially solved in a previous patch. Get rid ofthe whole thing now.Signed-off-by: Marc Zyngier List of files: /linux-6.15/arch/arm64/kvm/Makefile

dcfba399 - KVM: arm64: Consolidate exception injection

Thu, 15 Oct 2020 08:45:24 +0000

KVM: arm64: Consolidate exception injectionMove the AArch32 exception injection code back into the inject_fault.cfile, removing the need for a few non-static functions now that AArch32host support is a thing of the past.Signed-off-by: Marc Zyngier List of files: /linux-6.15/arch/arm64/kvm/Makefile