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2023-06-01KVM: arm64: Allocate pages for hypervisor FF-A mailboxesWill Deacon
The FF-A proxy code needs to allocate its own buffer pair for communication with EL3 and for forwarding calls from the host at EL1. Reserve a couple of pages for this purpose and use them to initialise the hypervisor's FF-A buffer structure. Co-developed-by: Andrew Walbran <qwandor@google.com> Signed-off-by: Andrew Walbran <qwandor@google.com> Signed-off-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20230523101828.7328-4-will@kernel.org Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-06-01KVM: arm64: Probe FF-A version and host/hyp partition ID during initWill Deacon
Probe FF-A during pKVM initialisation so that we can detect any inconsistencies in the version or partition ID early on. Signed-off-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20230523101828.7328-3-will@kernel.org Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-30KVM: arm64: Use BTI for nvheMostafa Saleh
CONFIG_ARM64_BTI_KERNEL compiles the kernel to support ARMv8.5-BTI. However, the nvhe code doesn't make use of it as it doesn't map any pages with Guarded Page(GP) bit. kvm pgtable code is modified to map executable pages with GP bit if BTI is enabled for the kernel. At hyp init, SCTLR_EL2.BT is set to 1 to match EL1 configuration (SCTLR_EL1.BT1) set in bti_enable(). One difference between kernel and nvhe code, is that the kernel maps .text with GP while nvhe maps all the executable pages, this makes nvhe code need to deal with special initialization code coming from other executable sections (.idmap.text). For this we need to add bti instruction at the beginning of __kvm_handle_stub_hvc as it can be called by __host_hvc through branch instruction(br) and unlike SYM_FUNC_START, SYM_CODE_START doesn’t add bti instruction at the beginning, and it can’t be modified to add it as it is used with vector tables. Another solution which is more intrusive is to convert __kvm_handle_stub_hvc to a function and inject “bti jc” instead of “bti c” in SYM_FUNC_START Signed-off-by: Mostafa Saleh <smostafa@google.com> Link: https://lore.kernel.org/r/20230530150845.2856828-1-smostafa@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-29arm64: memory: Make virt_to_pfn() a static inlineLinus Walleij
Making virt_to_pfn() a static inline taking a strongly typed (const void *) makes the contract of a passing a pointer of that type to the function explicit and exposes any misuse of the macro virt_to_pfn() acting polymorphic and accepting many types such as (void *), (unitptr_t) or (unsigned long) as arguments without warnings. Since arm64 is using <asm-generic/memory_model.h> to provide __phys_to_pfn() we need to move the inclusion of that header up, so we can resolve the static inline at compile time. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2023-05-26arm64/esr: Add decode of ISS2 to data abort reportingMark Brown
The architecture has added more information about faults to ISS2 within ESR. Add decode of this to our data abort fault decode to aid diagnostics. Features that are not currently enabled are included here for completeness. Since the architecture specifies the values of bits within ISS2 in terms of ISS2 rather than in terms of the register as a whole we do so for our definitions as well, this makes it easier to review bitfield definitions. Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20230417-arm64-iss2-dabt-decode-v3-2-c1fa503e503a@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-26arm64/esr: Use GENMASK() for the ISS maskMark Brown
We express the mask for ESR_ELx.ISS in a non-standard manner, not using the standard helpers. In preparation for adding decode for ISS2 convert to use GENMASK(). No functional change. Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20230417-arm64-iss2-dabt-decode-v3-1-c1fa503e503a@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: add alt_cb_patch_nops prototypeArnd Bergmann
alt_cb_patch_nops() is called through an inline asm macro, so it does not need a prototype for the caller, but adding it avoids this W=1 build warning: arch/arm64/kernel/alternative.c:295:14: error: no previous prototype for 'alt_cb_patch_nops' [-Werror=missing-prototypes] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-16-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: move early_brk64 prototype to headerArnd Bergmann
The prototype used for calling early_brk64() is in the file that calls it, which is the wrong place, as it is not included for the definition: arch/arm64/kernel/traps.c:1100:12: error: no previous prototype for 'early_brk64' [-Werror=missing-prototypes] Move it to an appropriate header instead. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-15-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: kaslr: add kaslr_early_init() declarationArnd Bergmann
kaslr_early_init() is called from assembler code and does not need a declaration to work, but adding one anyway shuts up this W=1 warning: arch/arm64/kernel/pi/kaslr_early.c:88:16: error: no previous prototype for 'kaslr_early_init' [-Werror=missing-prototypes] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-13-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: efi: add efi_handle_corrupted_x18 prototypeArnd Bergmann
This functions is only called from assembler and lacks a prototype, which is seen from this W=1 warning: arch/arm64/kernel/efi.c:155:25: error: no previous prototype for 'efi_handle_corrupted_x18' [-Werror=missing-prototypes] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-9-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: kvm: add prototypes for functions called in asmArnd Bergmann
A lot of kvm specific functions are called only from assembler and have no extern prototype, but that causes a W=1 warnings: arch/arm64/kvm/handle_exit.c:365:24: error: no previous prototype for 'nvhe_hyp_panic_handler' [-Werror=missing-prototypes] arch/arm64/kvm/va_layout.c:188:6: error: no previous prototype for 'kvm_patch_vector_branch' [-Werror=mi ssing-prototypes] arch/arm64/kvm/va_layout.c:287:6: error: no previous prototype for 'kvm_get_kimage_voffset' [-Werror=mis sing-prototypes] arch/arm64/kvm/va_layout.c:293:6: error: no previous prototype for 'kvm_compute_final_ctr_el0' [-Werror= missing-prototypes] arch/arm64/kvm/hyp/vhe/switch.c:259:17: error: no previous prototype for 'hyp_panic' [-Werror=missing-pr arch/arm64/kvm/hyp/nvhe/switch.c:389:17: error: no previous prototype for 'kvm_unexpected_el2_exception' arch/arm64/kvm/hyp/nvhe/switch.c:384:28: error: no previous prototype for 'hyp_panic_bad_stack' [-Werror arch/arm64/kvm/hyp/nvhe/hyp-main.c:383:6: error: no previous prototype for 'handle_trap' [-Werror=missin arch/arm64/kvm/hyp/nvhe/psci-relay.c:203:28: error: no previous prototype for 'kvm_host_psci_cpu_entry' [-Werror=missing-prototypes] Declare those in asm/kvm_asm.h, which already has related declarations. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-7-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: spectre: provide prototypes for internal functionsArnd Bergmann
The helpers in proton-pack.c are called from assembler and have no prototype in a header, which causes a W=1 warning: arch/arm64/kernel/proton-pack.c:568:13: error: no previous prototype for 'spectre_v4_patch_fw_mitigation_enable' [-Werror=missing-prototypes] arch/arm64/kernel/proton-pack.c:588:13: error: no previous prototype for 'smccc_patch_fw_mitigation_conduit' [-Werror=missing-prototypes] arch/arm64/kernel/proton-pack.c:1064:14: error: no previous prototype for 'spectre_bhb_patch_loop_mitigation_enable' [-Werror=missing-prototypes] arch/arm64/kernel/proton-pack.c:1075:14: error: no previous prototype for 'spectre_bhb_patch_fw_mitigation_enabled' [-Werror=missing-prototypes] Add these to asm/spectre.h, which contains related declarations already. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-6-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: move cpu_suspend_set_dbg_restorer() prototype to headerArnd Bergmann
The cpu_suspend_set_dbg_restorer() function is called by the hw_breakpoint code but defined in another file. Since the declaration is in the same file as the caller, the compiler warns about the definition without a prior prototype: arch/arm64/kernel/suspend.c:35:13: error: no previous prototype for 'cpu_suspend_set_dbg_restorer' [-Werror=missing-prototypes] Move it into the corresponding header instead to avoid the warning. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-5-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: avoid prototype warnings for syscallsArnd Bergmann
With W=1 warnings enabled, there are lots of complaints about missing prototypes for system calls, plus a few other related ones: arch/arm64/kernel/sys_compat.c:68:6: error: no previous prototype for 'compat_arm_syscall' [-Werror=missing-prototypes] arch/arm64/include/asm/syscall_wrapper.h:76:32: error: no previous prototype for '__arm64_sys_io_setup' [-Werror=missing-prototypes] arch/arm64/include/asm/syscall_wrapper.h:41:32: error: no previous prototype for '__arm64_compat_sys_io_setup' [-Werror=missing-prototypes] arch/arm64/include/asm/syscall_wrapper.h:76:32: error: no previous prototype for '__arm64_sys_io_destroy' [-Werror=missing-prototypes] arch/arm64/include/asm/syscall_wrapper.h:76:32: error: no previous prototype for '__arm64_sys_io_submit' [-Werror=missing-prototypes] Add declarations to the syscall macros to avoid all of these, plus one for the compat syscall entry. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-4-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-25arm64: add scs_patch_vmlinux prototypeArnd Bergmann
scs_patch_vmlinux() is only called from assembler code, so there is no prototype, but adding one avoids this warning: arch/arm64/kernel/patch-scs.c:254:24: error: no previous prototype for function 'scs_patch_vmlinux' [-Werror,-Wmissing-prototypes] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-3-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-05-24KVM: arm64: Reload PTE after invoking walker callback on preorder traversalFuad Tabba
The preorder callback on the kvm_pgtable_stage2_map() path can replace a table with a block, then recursively free the detached table. The higher-level walking logic stashes the old page table entry and then walks the freed table, invoking the leaf callback and potentially freeing pgtable pages prematurely. In normal operation, the call to tear down the detached stage-2 is indirected and uses an RCU callback to trigger the freeing. RCU is not available to pKVM, which is where this bug is triggered. Change the behavior of the walker to reload the page table entry after invoking the walker callback on preorder traversal, as it does for leaf entries. Tested on Pixel 6. Fixes: 5c359cca1faf ("KVM: arm64: Tear down unlinked stage-2 subtree after break-before-make") Suggested-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Fuad Tabba <tabba@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230522103258.402272-1-tabba@google.com
2023-05-24arm64: Add missing Set/Way CMO encodingsMarc Zyngier
Add the missing Set/Way CMOs that apply to tagged memory. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Steven Price <steven.price@arm.com> Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Link: https://lore.kernel.org/r/20230515204601.1270428-2-maz@kernel.org
2023-05-21Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm fixes from Paolo Bonzini: "ARM: - Plug a race in the stage-2 mapping code where the IPA and the PA would end up being out of sync - Make better use of the bitmap API (bitmap_zero, bitmap_zalloc...) - FP/SVE/SME documentation update, in the hope that this field becomes clearer... - Add workaround for Apple SEIS brokenness to a new SoC - Random comment fixes x86: - add MSR_IA32_TSX_CTRL into msrs_to_save - fixes for XCR0 handling in SGX enclaves Generic: - Fix vcpu_array[0] races - Fix race between starting a VM and 'reboot -f'" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: VMX: add MSR_IA32_TSX_CTRL into msrs_to_save KVM: x86: Don't adjust guest's CPUID.0x12.1 (allowed SGX enclave XFRM) KVM: VMX: Don't rely _only_ on CPUID to enforce XCR0 restrictions for ECREATE KVM: Fix vcpu_array[0] races KVM: VMX: Fix header file dependency of asm/vmx.h KVM: Don't enable hardware after a restart/shutdown is initiated KVM: Use syscore_ops instead of reboot_notifier to hook restart/shutdown KVM: arm64: vgic: Add Apple M2 PRO/MAX cpus to the list of broken SEIS implementations KVM: arm64: Clarify host SME state management KVM: arm64: Restructure check for SVE support in FP trap handler KVM: arm64: Document check for TIF_FOREIGN_FPSTATE KVM: arm64: Fix repeated words in comments KVM: arm64: Constify start/end/phys fields of the pgtable walker data KVM: arm64: Infer PA offset from VA in hyp map walker KVM: arm64: Infer the PA offset from IPA in stage-2 map walker KVM: arm64: Use the bitmap API to allocate bitmaps KVM: arm64: Slightly optimize flush_context()
2023-05-21KVM: arm64: Relax trapping of CTR_EL0 when FEAT_EVT is availableMarc Zyngier
CTR_EL0 can often be used in userspace, and it would be nice if KVM didn't have to emulate it unnecessarily. While it isn't possible to trap the cache configuration registers independently from CTR_EL0 in the base ARMv8.0 architecture, FEAT_EVT allows these cache configuration registers (CCSIDR_EL1, CCSIDR2_EL1, CLIDR_EL1 and CSSELR_EL1) to be trapped independently by setting HCR_EL2.TID4. Switch to using TID4 instead of TID2 in the cases where FEAT_EVT is available *and* that KVM doesn't need to sanitise CTR_EL0 to paper over mismatched cache configurations. Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230515170016.965378-1-maz@kernel.org Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-16KVM: arm64: Use local TLBI on permission relaxationMarc Zyngier
Broadcast TLB invalidations (TLBIs) targeting the Inner Shareable Domain are usually less performant than their non-shareable variant. In particular, we observed some implementations that take millliseconds to complete parallel broadcasted TLBIs. It's safe to use non-shareable TLBIs when relaxing permissions on a PTE in the KVM case. According to the ARM ARM (0487I.a) section D8.13.1 "Using break-before-make when updating translation table entries", permission relaxation does not need break-before-make. Specifically, R_WHZWS states that these are the only changes that require a break-before-make sequence: changes of memory type (Shareability or Cacheability), address changes, or changing the block size. Signed-off-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20230426172330.1439644-13-ricarkol@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-16KVM: arm64: Add kvm_uninit_stage2_mmu()Ricardo Koller
Add kvm_uninit_stage2_mmu() and move kvm_free_stage2_pgd() into it. A future commit will add some more things to do inside of kvm_uninit_stage2_mmu(). Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Shaoqin Huang <shahuang@redhat.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20230426172330.1439644-9-ricarkol@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-16KVM: arm64: Add kvm_pgtable_stage2_split()Ricardo Koller
Add a new stage2 function, kvm_pgtable_stage2_split(), for splitting a range of huge pages. This will be used for eager-splitting huge pages into PAGE_SIZE pages. The goal is to avoid having to split huge pages on write-protection faults, and instead use this function to do it ahead of time for large ranges (e.g., all guest memory in 1G chunks at a time). Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Shaoqin Huang <shahuang@redhat.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20230426172330.1439644-7-ricarkol@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-16KVM: arm64: Add KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZERicardo Koller
Add a capability for userspace to specify the eager split chunk size. The chunk size specifies how many pages to break at a time, using a single allocation. Bigger the chunk size, more pages need to be allocated ahead of time. Suggested-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20230426172330.1439644-6-ricarkol@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-16KVM: arm64: Add helper for creating unlinked stage2 subtreesRicardo Koller
Add a stage2 helper, kvm_pgtable_stage2_create_unlinked(), for creating unlinked tables (which is the opposite of kvm_pgtable_stage2_free_unlinked()). Creating an unlinked table is useful for splitting level 1 and 2 entries into subtrees of PAGE_SIZE PTEs. For example, a level 1 entry can be split into PAGE_SIZE PTEs by first creating a fully populated tree, and then use it to replace the level 1 entry in a single step. This will be used in a subsequent commit for eager huge-page splitting (a dirty-logging optimization). Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Shaoqin Huang <shahuang@redhat.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20230426172330.1439644-4-ricarkol@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-16KVM: arm64: Add KVM_PGTABLE_WALK flags for skipping CMOs and BBM TLBIsRicardo Koller
Add two flags to kvm_pgtable_visit_ctx, KVM_PGTABLE_WALK_SKIP_BBM_TLBI and KVM_PGTABLE_WALK_SKIP_CMO, to indicate that the walk should not perform TLB invalidations (TLBIs) in break-before-make (BBM) nor cache maintenance operations (CMO). This will be used by a future commit to create unlinked tables not accessible to the HW page-table walker. Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Shaoqin Huang <shahuang@redhat.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20230426172330.1439644-3-ricarkol@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-16KVM: arm64: Rename free_removed to free_unlinkedRicardo Koller
Normalize on referring to tables outside of an active paging structure as 'unlinked'. A subsequent change to KVM will add support for building page tables that are not part of an active paging structure. The existing 'removed_table' terminology is quite clunky when applied in this context. Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Reviewed-by: Shaoqin Huang <shahuang@redhat.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20230426172330.1439644-2-ricarkol@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-05-16arm64: perf: Mark all accessor functions inlineGeert Uytterhoeven
When just including <asm/arm_pmuv3.h>: arch/arm64/include/asm/arm_pmuv3.h:31:13: error: ‘write_pmevtypern’ defined but not used [-Werror=unused-function] 31 | static void write_pmevtypern(int n, unsigned long val) | ^~~~~~~~~~~~~~~~ arch/arm64/include/asm/arm_pmuv3.h:24:13: error: ‘write_pmevcntrn’ defined but not used [-Werror=unused-function] 24 | static void write_pmevcntrn(int n, unsigned long val) | ^~~~~~~~~~~~~~~ arch/arm64/include/asm/arm_pmuv3.h:16:22: error: ‘read_pmevcntrn’ defined but not used [-Werror=unused-function] 16 | static unsigned long read_pmevcntrn(int n) | ^~~~~~~~~~~~~~ Fix this by adding the missing "inline" keywords to the three accessor functions that lack them. Fixes: df29ddf4f04b ("arm64: perf: Abstract system register accesses away") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Marc Zyngier <maz@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/d53a19043c0c3bd25f6c203e73a2fb08a9661824.1683561482.git.geert+renesas@glider.be Signed-off-by: Will Deacon <will@kernel.org>
2023-05-15arm64: smp: Switch to hotplug core state synchronizationThomas Gleixner
Switch to the CPU hotplug core state tracking and synchronization mechanim. No functional change intended. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Tested-by: Helge Deller <deller@gmx.de> # parisc Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck Link: https://lore.kernel.org/r/20230512205256.690926018@linutronix.de
2023-05-11Merge branch kvm-arm64/pgtable-fixes-6.4 into kvmarm-master/fixesMarc Zyngier
* kvm-arm64/pgtable-fixes-6.4: : . : Fixes for concurrent S2 mapping race from Oliver: : : "So it appears that there is a race between two parallel stage-2 map : walkers that could lead to mapping the incorrect PA for a given IPA, as : the IPA -> PA relationship picks up an unintended offset. This series : eliminates the problem by using the current IPA of the walk as the : source-of-truth regarding where we are in a map operation." : . KVM: arm64: Constify start/end/phys fields of the pgtable walker data KVM: arm64: Infer PA offset from VA in hyp map walker KVM: arm64: Infer the PA offset from IPA in stage-2 map walker Signed-off-by: Marc Zyngier <maz@kernel.org>
2023-05-11Merge branch kvm-arm64/misc-6.4 into kvmarm-master/fixesMarc Zyngier
* kvm-arm64/misc-6.4: : . : Minor changes for 6.4: : : - Make better use of the bitmap API (bitmap_zero, bitmap_zalloc...) : : - FP/SVE/SME documentation update, in the hope that this field : becomes clearer... : : - Add workaround for the usual Apple SEIS brokenness : : - Random comment fixes : . KVM: arm64: vgic: Add Apple M2 PRO/MAX cpus to the list of broken SEIS implementations KVM: arm64: Clarify host SME state management KVM: arm64: Restructure check for SVE support in FP trap handler KVM: arm64: Document check for TIF_FOREIGN_FPSTATE KVM: arm64: Fix repeated words in comments KVM: arm64: Use the bitmap API to allocate bitmaps KVM: arm64: Slightly optimize flush_context() Signed-off-by: Marc Zyngier <maz@kernel.org>
2023-05-11KVM: arm64: vgic: Add Apple M2 PRO/MAX cpus to the list of broken SEIS ↵Marc Zyngier
implementations Unsurprisingly, the M2 PRO is also affected by the SEIS bug, so add it to the naughty list. And since M2 MAX is likely to be of the same ilk, flag it as well. Tested on a M2 PRO mini machine. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Zenghui Yu <yuzenghui@huawei.com> Link: https://lore.kernel.org/r/20230501182141.39770-1-maz@kernel.org
2023-05-09Merge drm/drm-next into drm-misc-nextMaxime Ripard
Start the 6.5 release cycle. Signed-off-by: Maxime Ripard <maxime@cerno.tech>
2023-05-05Merge tag 'locking-core-2023-05-05' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: - Introduce local{,64}_try_cmpxchg() - a slightly more optimal primitive, which will be used in perf events ring-buffer code - Simplify/modify rwsems on PREEMPT_RT, to address writer starvation - Misc cleanups/fixes * tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/atomic: Correct (cmp)xchg() instrumentation locking/x86: Define arch_try_cmpxchg_local() locking/arch: Wire up local_try_cmpxchg() locking/generic: Wire up local{,64}_try_cmpxchg() locking/atomic: Add generic try_cmpxchg{,64}_local() support locking/rwbase: Mitigate indefinite writer starvation locking/arch: Rename all internal __xchg() names to __arch_xchg()
2023-05-01Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm updates from Paolo Bonzini: "s390: - More phys_to_virt conversions - Improvement of AP management for VSIE (nested virtualization) ARM64: - Numerous fixes for the pathological lock inversion issue that plagued KVM/arm64 since... forever. - New framework allowing SMCCC-compliant hypercalls to be forwarded to userspace, hopefully paving the way for some more features being moved to VMMs rather than be implemented in the kernel. - Large rework of the timer code to allow a VM-wide offset to be applied to both virtual and physical counters as well as a per-timer, per-vcpu offset that complements the global one. This last part allows the NV timer code to be implemented on top. - A small set of fixes to make sure that we don't change anything affecting the EL1&0 translation regime just after having having taken an exception to EL2 until we have executed a DSB. This ensures that speculative walks started in EL1&0 have completed. - The usual selftest fixes and improvements. x86: - Optimize CR0.WP toggling by avoiding an MMU reload when TDP is enabled, and by giving the guest control of CR0.WP when EPT is enabled on VMX (VMX-only because SVM doesn't support per-bit controls) - Add CR0/CR4 helpers to query single bits, and clean up related code where KVM was interpreting kvm_read_cr4_bits()'s "unsigned long" return as a bool - Move AMD_PSFD to cpufeatures.h and purge KVM's definition - Avoid unnecessary writes+flushes when the guest is only adding new PTEs - Overhaul .sync_page() and .invlpg() to utilize .sync_page()'s optimizations when emulating invalidations - Clean up the range-based flushing APIs - Revamp the TDP MMU's reaping of Accessed/Dirty bits to clear a single A/D bit using a LOCK AND instead of XCHG, and skip all of the "handle changed SPTE" overhead associated with writing the entire entry - Track the number of "tail" entries in a pte_list_desc to avoid having to walk (potentially) all descriptors during insertion and deletion, which gets quite expensive if the guest is spamming fork() - Disallow virtualizing legacy LBRs if architectural LBRs are available, the two are mutually exclusive in hardware - Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES) after KVM_RUN, similar to CPUID features - Overhaul the vmx_pmu_caps selftest to better validate PERF_CAPABILITIES - Apply PMU filters to emulated events and add test coverage to the pmu_event_filter selftest - AMD SVM: - Add support for virtual NMIs - Fixes for edge cases related to virtual interrupts - Intel AMX: - Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if XTILE_DATA is not being reported due to userspace not opting in via prctl() - Fix a bug in emulation of ENCLS in compatibility mode - Allow emulation of NOP and PAUSE for L2 - AMX selftests improvements - Misc cleanups MIPS: - Constify MIPS's internal callbacks (a leftover from the hardware enabling rework that landed in 6.3) Generic: - Drop unnecessary casts from "void *" throughout kvm_main.c - Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct size by 8 bytes on 64-bit kernels by utilizing a padding hole Documentation: - Fix goof introduced by the conversion to rST" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (211 commits) KVM: s390: pci: fix virtual-physical confusion on module unload/load KVM: s390: vsie: clarifications on setting the APCB KVM: s390: interrupt: fix virtual-physical confusion for next alert GISA KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init() KVM: selftests: Test the PMU event "Instructions retired" KVM: selftests: Copy full counter values from guest in PMU event filter test KVM: selftests: Use error codes to signal errors in PMU event filter test KVM: selftests: Print detailed info in PMU event filter asserts KVM: selftests: Add helpers for PMC asserts in PMU event filter test KVM: selftests: Add a common helper for the PMU event filter guest code KVM: selftests: Fix spelling mistake "perrmited" -> "permitted" KVM: arm64: vhe: Drop extra isb() on guest exit KVM: arm64: vhe: Synchronise with page table walker on MMU update KVM: arm64: pkvm: Document the side effects of kvm_flush_dcache_to_poc() KVM: arm64: nvhe: Synchronise with page table walker on TLBI KVM: arm64: Handle 32bit CNTPCTSS traps KVM: arm64: nvhe: Synchronise with page table walker on vcpu run KVM: arm64: vgic: Don't acquire its_lock before config_lock KVM: selftests: Add test to verify KVM's supported XCR0 ...
2023-04-29locking/arch: Rename all internal __xchg() names to __arch_xchg()Andrzej Hajda
Decrease the probability of this internal facility to be used by driver code. Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Palmer Dabbelt <palmer@rivosinc.com> [riscv] Link: https://lore.kernel.org/r/20230118154450.73842-1-andrzej.hajda@intel.com Cc: Linus Torvalds <torvalds@linux-foundation.org>
2023-04-28Merge tag 'objtool-core-2023-04-27' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull objtool updates from Ingo Molnar: - Mark arch_cpu_idle_dead() __noreturn, make all architectures & drivers that did this inconsistently follow this new, common convention, and fix all the fallout that objtool can now detect statically - Fix/improve the ORC unwinder becoming unreliable due to UNWIND_HINT_EMPTY ambiguity, split it into UNWIND_HINT_END_OF_STACK and UNWIND_HINT_UNDEFINED to resolve it - Fix noinstr violations in the KCSAN code and the lkdtm/stackleak code - Generate ORC data for __pfx code - Add more __noreturn annotations to various kernel startup/shutdown and panic functions - Misc improvements & fixes * tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits) x86/hyperv: Mark hv_ghcb_terminate() as noreturn scsi: message: fusion: Mark mpt_halt_firmware() __noreturn x86/cpu: Mark {hlt,resume}_play_dead() __noreturn btrfs: Mark btrfs_assertfail() __noreturn objtool: Include weak functions in global_noreturns check cpu: Mark nmi_panic_self_stop() __noreturn cpu: Mark panic_smp_self_stop() __noreturn arm64/cpu: Mark cpu_park_loop() and friends __noreturn x86/head: Mark *_start_kernel() __noreturn init: Mark start_kernel() __noreturn init: Mark [arch_call_]rest_init() __noreturn objtool: Generate ORC data for __pfx code x86/linkage: Fix padding for typed functions objtool: Separate prefix code from stack validation code objtool: Remove superfluous dead_end_function() check objtool: Add symbol iteration helpers objtool: Add WARN_INSN() scripts/objdump-func: Support multiple functions context_tracking: Fix KCSAN noinstr violation objtool: Add stackleak instrumentation to uaccess safe list ...
2023-04-28Merge tag 'x86_mm_for_6.4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 LAM (Linear Address Masking) support from Dave Hansen: "Add support for the new Linear Address Masking CPU feature. This is similar to ARM's Top Byte Ignore and allows userspace to store metadata in some bits of pointers without masking it out before use" * tag 'x86_mm_for_6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm/iommu/sva: Do not allow to set FORCE_TAGGED_SVA bit from outside x86/mm/iommu/sva: Fix error code for LAM enabling failure due to SVA selftests/x86/lam: Add test cases for LAM vs thread creation selftests/x86/lam: Add ARCH_FORCE_TAGGED_SVA test cases for linear-address masking selftests/x86/lam: Add inherit test cases for linear-address masking selftests/x86/lam: Add io_uring test cases for linear-address masking selftests/x86/lam: Add mmap and SYSCALL test cases for linear-address masking selftests/x86/lam: Add malloc and tag-bits test cases for linear-address masking x86/mm/iommu/sva: Make LAM and SVA mutually exclusive iommu/sva: Replace pasid_valid() helper with mm_valid_pasid() mm: Expose untagging mask in /proc/$PID/status x86/mm: Provide arch_prctl() interface for LAM x86/mm: Reduce untagged_addr() overhead for systems without LAM x86/uaccess: Provide untagged_addr() and remove tags before address check mm: Introduce untagged_addr_remote() x86/mm: Handle LAM on context switch x86: CPUID and CR3/CR4 flags for Linear Address Masking x86: Allow atomic MM_CONTEXT flags setting x86/mm: Rework address range check in get_user() and put_user()
2023-04-27Merge tag 'mm-stable-2023-04-27-15-30' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of switching from a user process to a kernel thread. - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav. - zsmalloc performance improvements from Sergey Senozhatsky. - Yue Zhao has found and fixed some data race issues around the alteration of memcg userspace tunables. - VFS rationalizations from Christoph Hellwig: - removal of most of the callers of write_one_page() - make __filemap_get_folio()'s return value more useful - Luis Chamberlain has changed tmpfs so it no longer requires swap backing. Use `mount -o noswap'. - Qi Zheng has made the slab shrinkers operate locklessly, providing some scalability benefits. - Keith Busch has improved dmapool's performance, making part of its operations O(1) rather than O(n). - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd, permitting userspace to wr-protect anon memory unpopulated ptes. - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather than exclusive, and has fixed a bunch of errors which were caused by its unintuitive meaning. - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature, which causes minor faults to install a write-protected pte. - Vlastimil Babka has done some maintenance work on vma_merge(): cleanups to the kernel code and improvements to our userspace test harness. - Cleanups to do_fault_around() by Lorenzo Stoakes. - Mike Rapoport has moved a lot of initialization code out of various mm/ files and into mm/mm_init.c. - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for DRM, but DRM doesn't use it any more. - Lorenzo has also coverted read_kcore() and vread() to use iterators and has thereby removed the use of bounce buffers in some cases. - Lorenzo has also contributed further cleanups of vma_merge(). - Chaitanya Prakash provides some fixes to the mmap selftesting code. - Matthew Wilcox changes xfs and afs so they no longer take sleeping locks in ->map_page(), a step towards RCUification of pagefaults. - Suren Baghdasaryan has improved mmap_lock scalability by switching to per-VMA locking. - Frederic Weisbecker has reworked the percpu cache draining so that it no longer causes latency glitches on cpu isolated workloads. - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig logic. - Liu Shixin has changed zswap's initialization so we no longer waste a chunk of memory if zswap is not being used. - Yosry Ahmed has improved the performance of memcg statistics flushing. - David Stevens has fixed several issues involving khugepaged, userfaultfd and shmem. - Christoph Hellwig has provided some cleanup work to zram's IO-related code paths. - David Hildenbrand has fixed up some issues in the selftest code's testing of our pte state changing. - Pankaj Raghav has made page_endio() unneeded and has removed it. - Peter Xu contributed some rationalizations of the userfaultfd selftests. - Yosry Ahmed has fixed an issue around memcg's page recalim accounting. - Chaitanya Prakash has fixed some arm-related issues in the selftests/mm code. - Longlong Xia has improved the way in which KSM handles hwpoisoned pages. - Peter Xu fixes a few issues with uffd-wp at fork() time. - Stefan Roesch has changed KSM so that it may now be used on a per-process and per-cgroup basis. * tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits) mm,unmap: avoid flushing TLB in batch if PTE is inaccessible shmem: restrict noswap option to initial user namespace mm/khugepaged: fix conflicting mods to collapse_file() sparse: remove unnecessary 0 values from rc mm: move 'mmap_min_addr' logic from callers into vm_unmapped_area() hugetlb: pte_alloc_huge() to replace huge pte_alloc_map() maple_tree: fix allocation in mas_sparse_area() mm: do not increment pgfault stats when page fault handler retries zsmalloc: allow only one active pool compaction context selftests/mm: add new selftests for KSM mm: add new KSM process and sysfs knobs mm: add new api to enable ksm per process mm: shrinkers: fix debugfs file permissions mm: don't check VMA write permissions if the PTE/PMD indicates write permissions migrate_pages_batch: fix statistics for longterm pin retry userfaultfd: use helper function range_in_vma() lib/show_mem.c: use for_each_populated_zone() simplify code mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list() fs/buffer: convert create_page_buffers to folio_create_buffers fs/buffer: add folio_create_empty_buffers helper ...
2023-04-26Merge tag 'kvmarm-6.4' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm64 updates for 6.4 - Numerous fixes for the pathological lock inversion issue that plagued KVM/arm64 since... forever. - New framework allowing SMCCC-compliant hypercalls to be forwarded to userspace, hopefully paving the way for some more features being moved to VMMs rather than be implemented in the kernel. - Large rework of the timer code to allow a VM-wide offset to be applied to both virtual and physical counters as well as a per-timer, per-vcpu offset that complements the global one. This last part allows the NV timer code to be implemented on top. - A small set of fixes to make sure that we don't change anything affecting the EL1&0 translation regime just after having having taken an exception to EL2 until we have executed a DSB. This ensures that speculative walks started in EL1&0 have completed. - The usual selftest fixes and improvements.
2023-04-25Merge tag 'arm64-upstream' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Will Deacon: "ACPI: - Improve error reporting when failing to manage SDEI on AGDI device removal Assembly routines: - Improve register constraints so that the compiler can make use of the zero register instead of moving an immediate #0 into a GPR - Allow the compiler to allocate the registers used for CAS instructions CPU features and system registers: - Cleanups to the way in which CPU features are identified from the ID register fields - Extend system register definition generation to handle Enum types when defining shared register fields - Generate definitions for new _EL2 registers and add new fields for ID_AA64PFR1_EL1 - Allow SVE to be disabled separately from SME on the kernel command-line Tracing: - Support for "direct calls" in ftrace, which enables BPF tracing for arm64 Kdump: - Don't bother unmapping the crashkernel from the linear mapping, which then allows us to use huge (block) mappings and reduce TLB pressure when a crashkernel is loaded. Memory management: - Try again to remove data cache invalidation from the coherent DMA allocation path - Simplify the fixmap code by mapping at page granularity - Allow the kfence pool to be allocated early, preventing the rest of the linear mapping from being forced to page granularity Perf and PMU: - Move CPU PMU code out to drivers/perf/ where it can be reused by the 32-bit ARM architecture when running on ARMv8 CPUs - Fix race between CPU PMU probing and pKVM host de-privilege - Add support for Apple M2 CPU PMU - Adjust the generic PERF_COUNT_HW_BRANCH_INSTRUCTIONS event dynamically, depending on what the CPU actually supports - Minor fixes and cleanups to system PMU drivers Stack tracing: - Use the XPACLRI instruction to strip PAC from pointers, rather than rolling our own function in C - Remove redundant PAC removal for toolchains that handle this in their builtins - Make backtracing more resilient in the face of instrumentation Miscellaneous: - Fix single-step with KGDB - Remove harmless warning when 'nokaslr' is passed on the kernel command-line - Minor fixes and cleanups across the board" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (72 commits) KVM: arm64: Ensure CPU PMU probes before pKVM host de-privilege arm64: kexec: include reboot.h arm64: delete dead code in this_cpu_set_vectors() arm64/cpufeature: Use helper macro to specify ID register for capabilites drivers/perf: hisi: add NULL check for name drivers/perf: hisi: Remove redundant initialized of pmu->name arm64/cpufeature: Consistently use symbolic constants for min_field_value arm64/cpufeature: Pull out helper for CPUID register definitions arm64/sysreg: Convert HFGITR_EL2 to automatic generation ACPI: AGDI: Improve error reporting for problems during .remove() arm64: kernel: Fix kernel warning when nokaslr is passed to commandline perf/arm-cmn: Fix port detection for CMN-700 arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step arm64: move PAC masks to <asm/pointer_auth.h> arm64: use XPACLRI to strip PAC arm64: avoid redundant PAC stripping in __builtin_return_address() arm64/sme: Fix some comments of ARM SME arm64/signal: Alloc tpidr2 sigframe after checking system_supports_tpidr2() arm64/signal: Use system_supports_tpidr2() to check TPIDR2 arm64/idreg: Don't disable SME when disabling SVE ...
2023-04-21KVM: arm64: Infer the PA offset from IPA in stage-2 map walkerOliver Upton
Until now, the page table walker counted increments to the PA and IPA of a walk in two separate places. While the PA is incremented as soon as a leaf PTE is installed in stage2_map_walker_try_leaf(), the IPA is actually bumped in the generic table walker context. Critically, __kvm_pgtable_visit() rereads the PTE after the LEAF callback returns to work out if a table or leaf was installed, and only bumps the IPA for a leaf PTE. This arrangement worked fine when we handled faults behind the write lock, as the walker had exclusive access to the stage-2 page tables. However, commit 1577cb5823ce ("KVM: arm64: Handle stage-2 faults in parallel") started handling all stage-2 faults behind the read lock, opening up a race where a walker could increment the PA but not the IPA of a walk. Nothing good ensues, as the walker starts mapping with the incorrect IPA -> PA relationship. For example, assume that two vCPUs took a data abort on the same IPA. One observes that dirty logging is disabled, and the other observed that it is enabled: vCPU attempting PMD mapping vCPU attempting PTE mapping ====================================== ===================================== /* install PMD */ stage2_make_pte(ctx, leaf); data->phys += granule; /* replace PMD with a table */ stage2_try_break_pte(ctx, data->mmu); stage2_make_pte(ctx, table); /* table is observed */ ctx.old = READ_ONCE(*ptep); table = kvm_pte_table(ctx.old, level); /* * map walk continues w/o incrementing * IPA. */ __kvm_pgtable_walk(..., level + 1); Bring an end to the whole mess by using the IPA as the single source of truth for how far along a walk has gotten. Work out the correct PA to map by calculating the IPA offset from the beginning of the walk and add that to the starting physical address. Cc: stable@vger.kernel.org Fixes: 1577cb5823ce ("KVM: arm64: Handle stage-2 faults in parallel") Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230421071606.1603916-2-oliver.upton@linux.dev
2023-04-21Merge branch kvm-arm64/smccc-filtering into kvmarm-master/nextMarc Zyngier
* kvm-arm64/smccc-filtering: : . : SMCCC call filtering and forwarding to userspace, courtesy of : Oliver Upton. From the cover letter: : : "The Arm SMCCC is rather prescriptive in regards to the allocation of : SMCCC function ID ranges. Many of the hypercall ranges have an : associated specification from Arm (FF-A, PSCI, SDEI, etc.) with some : room for vendor-specific implementations. : : The ever-expanding SMCCC surface leaves a lot of work within KVM for : providing new features. Furthermore, KVM implements its own : vendor-specific ABI, with little room for other implementations (like : Hyper-V, for example). Rather than cramming it all into the kernel we : should provide a way for userspace to handle hypercalls." : . KVM: selftests: Fix spelling mistake "KVM_HYPERCAL_EXIT_SMC" -> "KVM_HYPERCALL_EXIT_SMC" KVM: arm64: Test that SMC64 arch calls are reserved KVM: arm64: Prevent userspace from handling SMC64 arch range KVM: arm64: Expose SMC/HVC width to userspace KVM: selftests: Add test for SMCCC filter KVM: selftests: Add a helper for SMCCC calls with SMC instruction KVM: arm64: Let errors from SMCCC emulation to reach userspace KVM: arm64: Return NOT_SUPPORTED to guest for unknown PSCI version KVM: arm64: Introduce support for userspace SMCCC filtering KVM: arm64: Add support for KVM_EXIT_HYPERCALL KVM: arm64: Use a maple tree to represent the SMCCC filter KVM: arm64: Refactor hvc filtering to support different actions KVM: arm64: Start handling SMCs from EL1 KVM: arm64: Rename SMC/HVC call handler to reflect reality KVM: arm64: Add vm fd device attribute accessors KVM: arm64: Add a helper to check if a VM has ran once KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL Signed-off-by: Marc Zyngier <maz@kernel.org>
2023-04-21Merge branch kvm-arm64/timer-vm-offsets into kvmarm-master/nextMarc Zyngier
* kvm-arm64/timer-vm-offsets: (21 commits) : . : This series aims at satisfying multiple goals: : : - allow a VMM to atomically restore a timer offset for a whole VM : instead of updating the offset each time a vcpu get its counter : written : : - allow a VMM to save/restore the physical timer context, something : that we cannot do at the moment due to the lack of offsetting : : - provide a framework that is suitable for NV support, where we get : both global and per timer, per vcpu offsetting, and manage : interrupts in a less braindead way. : : Conflict resolution involves using the new per-vcpu config lock instead : of the home-grown timer lock. : . KVM: arm64: Handle 32bit CNTPCTSS traps KVM: arm64: selftests: Augment existing timer test to handle variable offset KVM: arm64: selftests: Deal with spurious timer interrupts KVM: arm64: selftests: Add physical timer registers to the sysreg list KVM: arm64: nv: timers: Support hyp timer emulation KVM: arm64: nv: timers: Add a per-timer, per-vcpu offset KVM: arm64: Document KVM_ARM_SET_CNT_OFFSETS and co KVM: arm64: timers: Abstract the number of valid timers per vcpu KVM: arm64: timers: Fast-track CNTPCT_EL0 trap handling KVM: arm64: Elide kern_hyp_va() in VHE-specific parts of the hypervisor KVM: arm64: timers: Move the timer IRQs into arch_timer_vm_data KVM: arm64: timers: Abstract per-timer IRQ access KVM: arm64: timers: Rationalise per-vcpu timer init KVM: arm64: timers: Allow save/restoring of the physical timer KVM: arm64: timers: Allow userspace to set the global counter offset KVM: arm64: Expose {un,}lock_all_vcpus() to the rest of KVM KVM: arm64: timers: Allow physical offset without CNTPOFF_EL2 KVM: arm64: timers: Use CNTPOFF_EL2 to offset the physical timer arm64: Add HAS_ECV_CNTPOFF capability arm64: Add CNTPOFF_EL2 register definition ... Signed-off-by: Marc Zyngier <maz@kernel.org>
2023-04-20Merge branch 'for-next/sysreg' into for-next/coreWill Deacon
* for-next/sysreg: arm64/sysreg: Convert HFGITR_EL2 to automatic generation arm64/idreg: Don't disable SME when disabling SVE arm64/sysreg: Update ID_AA64PFR1_EL1 for DDI0601 2022-12 arm64/sysreg: Convert HFG[RW]TR_EL2 to automatic generation arm64/sysreg: allow *Enum blocks in SysregFields blocks
2023-04-20Merge branch 'for-next/stacktrace' into for-next/coreWill Deacon
* for-next/stacktrace: arm64: move PAC masks to <asm/pointer_auth.h> arm64: use XPACLRI to strip PAC arm64: avoid redundant PAC stripping in __builtin_return_address() arm64: stacktrace: always inline core stacktrace functions arm64: stacktrace: move dump functions to end of file arm64: stacktrace: recover return address for first entry
2023-04-20Merge branch 'for-next/perf' into for-next/coreWill Deacon
* for-next/perf: (24 commits) KVM: arm64: Ensure CPU PMU probes before pKVM host de-privilege drivers/perf: hisi: add NULL check for name drivers/perf: hisi: Remove redundant initialized of pmu->name perf/arm-cmn: Fix port detection for CMN-700 arm64: pmuv3: dynamically map PERF_COUNT_HW_BRANCH_INSTRUCTIONS perf/arm-cmn: Validate cycles events fully Revert "ARM: mach-virt: Select PMUv3 driver by default" drivers/perf: apple_m1: Add Apple M2 support dt-bindings: arm-pmu: Add PMU compatible strings for Apple M2 cores perf: arm_cspmu: Fix variable dereference warning perf/amlogic: Fix config1/config2 parsing issue drivers/perf: Use devm_platform_get_and_ioremap_resource() kbuild, drivers/perf: remove MODULE_LICENSE in non-modules perf: qcom: Use devm_platform_get_and_ioremap_resource() perf: arm: Use devm_platform_get_and_ioremap_resource() perf/arm-cmn: Move overlapping wp_combine field ARM: mach-virt: Select PMUv3 driver by default ARM: perf: Allow the use of the PMUv3 driver on 32bit ARM ARM: Make CONFIG_CPU_V7 valid for 32bit ARMv8 implementations perf: pmuv3: Change GENMASK to GENMASK_ULL ...
2023-04-20Merge branch 'for-next/mm' into for-next/coreWill Deacon
* for-next/mm: arm64: mm: always map fixmap at page granularity arm64: mm: move fixmap code to its own file arm64: add FIXADDR_TOT_{START,SIZE} Revert "Revert "arm64: dma: Drop cache invalidation from arch_dma_prep_coherent()"" arm: uaccess: Remove memcpy_page_flushcache() mm,kfence: decouple kfence from page granularity mapping judgement
2023-04-20Merge branch 'for-next/misc' into for-next/coreWill Deacon
* for-next/misc: arm64: kexec: include reboot.h arm64: delete dead code in this_cpu_set_vectors() arm64: kernel: Fix kernel warning when nokaslr is passed to commandline arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step arm64/sme: Fix some comments of ARM SME arm64/signal: Alloc tpidr2 sigframe after checking system_supports_tpidr2() arm64/signal: Use system_supports_tpidr2() to check TPIDR2 arm64: compat: Remove defines now in asm-generic arm64: kexec: remove unnecessary (void*) conversions arm64: armv8_deprecated: remove unnecessary (void*) conversions firmware: arm_sdei: Fix sleep from invalid context BUG
2023-04-20Merge branch 'for-next/kdump' into for-next/coreWill Deacon
* for-next/kdump: arm64: kdump: defer the crashkernel reservation for platforms with no DMA memory zones arm64: kdump: do not map crashkernel region specifically arm64: kdump : take off the protection on crashkernel memory region
2023-04-20Merge branch 'for-next/ftrace' into for-next/coreWill Deacon
* for-next/ftrace: arm64: ftrace: Simplify get_ftrace_plt arm64: ftrace: Add direct call support ftrace: selftest: remove broken trace_direct_tramp ftrace: Make DIRECT_CALLS work WITH_ARGS and !WITH_REGS ftrace: Store direct called addresses in their ops ftrace: Rename _ftrace_direct_multi APIs to _ftrace_direct APIs ftrace: Remove the legacy _ftrace_direct API ftrace: Replace uses of _ftrace_direct APIs with _ftrace_direct_multi ftrace: Let unregister_ftrace_direct_multi() call ftrace_free_filter()
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-29 20:30:47 +0000