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2022-01-16Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds162-1832/+4109
Pull kvm updates from Paolo Bonzini: "RISCV: - Use common KVM implementation of MMU memory caches - SBI v0.2 support for Guest - Initial KVM selftests support - Fix to avoid spurious virtual interrupts after clearing hideleg CSR - Update email address for Anup and Atish ARM: - Simplification of the 'vcpu first run' by integrating it into KVM's 'pid change' flow - Refactoring of the FP and SVE state tracking, also leading to a simpler state and less shared data between EL1 and EL2 in the nVHE case - Tidy up the header file usage for the nvhe hyp object - New HYP unsharing mechanism, finally allowing pages to be unmapped from the Stage-1 EL2 page-tables - Various pKVM cleanups around refcounting and sharing - A couple of vgic fixes for bugs that would trigger once the vcpu xarray rework is merged, but not sooner - Add minimal support for ARMv8.7's PMU extension - Rework kvm_pgtable initialisation ahead of the NV work - New selftest for IRQ injection - Teach selftests about the lack of default IPA space and page sizes - Expand sysreg selftest to deal with Pointer Authentication - The usual bunch of cleanups and doc update s390: - fix sigp sense/start/stop/inconsistency - cleanups x86: - Clean up some function prototypes more - improved gfn_to_pfn_cache with proper invalidation, used by Xen emulation - add KVM_IRQ_ROUTING_XEN_EVTCHN and event channel delivery - completely remove potential TOC/TOU races in nested SVM consistency checks - update some PMCs on emulated instructions - Intel AMX support (joint work between Thomas and Intel) - large MMU cleanups - module parameter to disable PMU virtualization - cleanup register cache - first part of halt handling cleanups - Hyper-V enlightened MSR bitmap support for nested hypervisors Generic: - clean up Makefiles - introduce CONFIG_HAVE_KVM_DIRTY_RING - optimize memslot lookup using a tree - optimize vCPU array usage by converting to xarray" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (268 commits) x86/fpu: Fix inline prefix warnings selftest: kvm: Add amx selftest selftest: kvm: Move struct kvm_x86_state to header selftest: kvm: Reorder vcpu_load_state steps for AMX kvm: x86: Disable interception for IA32_XFD on demand x86/fpu: Provide fpu_sync_guest_vmexit_xfd_state() kvm: selftests: Add support for KVM_CAP_XSAVE2 kvm: x86: Add support for getting/setting expanded xstate buffer x86/fpu: Add uabi_size to guest_fpu kvm: x86: Add CPUID support for Intel AMX kvm: x86: Add XCR0 support for Intel AMX kvm: x86: Disable RDMSR interception of IA32_XFD_ERR kvm: x86: Emulate IA32_XFD_ERR for guest kvm: x86: Intercept #NM for saving IA32_XFD_ERR x86/fpu: Prepare xfd_err in struct fpu_guest kvm: x86: Add emulation for IA32_XFD x86/fpu: Provide fpu_update_guest_xfd() for IA32_XFD emulation kvm: x86: Enable dynamic xfeatures at KVM_SET_CPUID2 x86/fpu: Provide fpu_enable_guest_xfd_features() for KVM x86/fpu: Add guest support to xfd_enable_feature() ...
2022-01-16Merge tag 'hyperv-next-signed-20220114' of ↵Linus Torvalds6-13/+73
git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux Pull hyperv updates from Wei Liu: - More patches for Hyper-V isolation VM support (Tianyu Lan) - Bug fixes and clean-up patches from various people * tag 'hyperv-next-signed-20220114' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: scsi: storvsc: Fix storvsc_queuecommand() memory leak x86/hyperv: Properly deal with empty cpumasks in hyperv_flush_tlb_multi() Drivers: hv: vmbus: Initialize request offers message for Isolation VM scsi: storvsc: Fix unsigned comparison to zero swiotlb: Add CONFIG_HAS_IOMEM check around swiotlb_mem_remap() x86/hyperv: Fix definition of hv_ghcb_pg variable Drivers: hv: Fix definition of hypercall input & output arg variables net: netvsc: Add Isolation VM support for netvsc driver scsi: storvsc: Add Isolation VM support for storvsc driver hyper-v: Enable swiotlb bounce buffer for Isolation VM x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has() swiotlb: Add swiotlb bounce buffer remap function for HV IVM
2022-01-16powerpc/32s: Fix kasan_init_region() for KASANChristophe Leroy3-33/+38
It has been reported some configuration where the kernel doesn't boot with KASAN enabled. This is due to wrong BAT allocation for the KASAN area: ---[ Data Block Address Translation ]--- 0: 0xc0000000-0xcfffffff 0x00000000 256M Kernel rw m 1: 0xd0000000-0xdfffffff 0x10000000 256M Kernel rw m 2: 0xe0000000-0xefffffff 0x20000000 256M Kernel rw m 3: 0xf8000000-0xf9ffffff 0x2a000000 32M Kernel rw m 4: 0xfa000000-0xfdffffff 0x2c000000 64M Kernel rw m A BAT must have both virtual and physical addresses alignment matching the size of the BAT. This is not the case for BAT 4 above. Fix kasan_init_region() by using block_size() function that is in book3s32/mmu.c. To be able to reuse it here, make it non static and change its name to bat_block_size() in order to avoid name conflict with block_size() defined in <linux/blkdev.h> Also reuse find_free_bat() to avoid an error message from setbat() when no BAT is available. And allocate memory outside of linear memory mapping to avoid wasting that precious space. With this change we get correct alignment for BATs and KASAN shadow memory is allocated outside the linear memory space. ---[ Data Block Address Translation ]--- 0: 0xc0000000-0xcfffffff 0x00000000 256M Kernel rw 1: 0xd0000000-0xdfffffff 0x10000000 256M Kernel rw 2: 0xe0000000-0xefffffff 0x20000000 256M Kernel rw 3: 0xf8000000-0xfbffffff 0x7c000000 64M Kernel rw 4: 0xfc000000-0xfdffffff 0x7a000000 32M Kernel rw Fixes: 7974c4732642 ("powerpc/32s: Implement dedicated kasan_init_region()") Cc: stable@vger.kernel.org Reported-by: Maxime Bizon <mbizon@freebox.fr> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Tested-by: Maxime Bizon <mbizon@freebox.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/7a50ef902494d1325227d47d33dada01e52e5518.1641818726.git.christophe.leroy@csgroup.eu
2022-01-16powerpc/time: Fix build failure due to do_hard_irq_enable() on PPC32Christophe Leroy1-1/+1
CC arch/powerpc/kernel/time.o In file included from <command-line>: ./arch/powerpc/include/asm/hw_irq.h: In function 'do_hard_irq_enable': ././include/linux/compiler_types.h:335:45: error: call to '__compiletime_assert_35' declared with attribute error: BUILD_BUG failed 335 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^ ././include/linux/compiler_types.h:316:25: note: in definition of macro '__compiletime_assert' 316 | prefix ## suffix(); \ | ^~~~~~ ././include/linux/compiler_types.h:335:9: note: in expansion of macro '_compiletime_assert' 335 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG' 59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed") | ^~~~~~~~~~~~~~~~ ./arch/powerpc/include/asm/hw_irq.h:483:9: note: in expansion of macro 'BUILD_BUG' 483 | BUILD_BUG(); | ^~~~~~~~~ should_hard_irq_enable() returns false on PPC32 so this BUILD_BUG() shouldn't trigger. Force inlining of should_hard_irq_enable() Fixes: 0faf20a1ad16 ("powerpc/64s/interrupt: Don't enable MSR[EE] in irq handlers unless perf is in use") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/247e01e0e10f4dbc59b5ff89e81702eb1ee7641e.1641828571.git.christophe.leroy@csgroup.eu
2022-01-16Merge tag 'pci-v5.17-changes' of ↵Linus Torvalds11-23/+109
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull pci updates from Bjorn Helgaas: "Enumeration: - Use pci_find_vsec_capability() instead of open-coding it (Andy Shevchenko) - Convert pci_dev_present() stub from macro to static inline to avoid 'unused variable' errors (Hans de Goede) - Convert sysfs slot attributes from default_attrs to default_groups (Greg Kroah-Hartman) - Use DWORD accesses for LTR, L1 SS to avoid BayHub OZ711LV2 erratum (Rajat Jain) - Remove unnecessary initialization of static variables (Longji Guo) Resource management: - Always write Intel I210 ROM BAR on update to work around device defect (Bjorn Helgaas) PCIe native device hotplug: - Fix pciehp lockdep errors on Thunderbolt undock (Hans de Goede) - Fix infinite loop in pciehp IRQ handler on power fault (Lukas Wunner) Power management: - Convert amd64-agp, sis-agp, via-agp from legacy PCI power management to generic power management (Vaibhav Gupta) IOMMU: - Add function 1 DMA alias quirk for Marvell 88SE9125 SATA controller so it can work with an IOMMU (Yifeng Li) Error handling: - Add PCI_ERROR_RESPONSE and related definitions for signaling and checking for transaction errors on PCI (Naveen Naidu) - Fabricate PCI_ERROR_RESPONSE data (~0) in config read wrappers, instead of in host controller drivers, when transactions fail on PCI (Naveen Naidu) - Use PCI_POSSIBLE_ERROR() to check for possible failure of config reads (Naveen Naidu) Peer-to-peer DMA: - Add Logan Gunthorpe as P2PDMA maintainer (Bjorn Helgaas) ASPM: - Calculate link L0s and L1 exit latencies when needed instead of caching them (Saheed O. Bolarinwa) - Calculate device L0s and L1 acceptable exit latencies when needed instead of caching them (Saheed O. Bolarinwa) - Remove struct aspm_latency since it's no longer needed (Saheed O. Bolarinwa) APM X-Gene PCIe controller driver: - Fix IB window setup, which was broken by the fact that IB resources are now sorted in address order instead of DT dma-ranges order (Rob Herring) Apple PCIe controller driver: - Enable clock gating to save power (Hector Martin) - Fix REFCLK1 enable/poll logic (Hector Martin) Broadcom STB PCIe controller driver: - Declare bitmap correctly for use by bitmap interfaces (Christophe JAILLET) - Clean up computation of legacy and non-legacy MSI bitmasks (Florian Fainelli) - Update suspend/resume/remove error handling to warn about errors and not fail the operation (Jim Quinlan) - Correct the "pcie" and "msi" interrupt descriptions in DT binding (Jim Quinlan) - Add DT bindings for endpoint voltage regulators (Jim Quinlan) - Split brcm_pcie_setup() into two functions (Jim Quinlan) - Add mechanism for turning on voltage regulators for connected devices (Jim Quinlan) - Turn voltage regulators for connected devices on/off when bus is added or removed (Jim Quinlan) - When suspending, don't turn off voltage regulators for wakeup devices (Jim Quinlan) Freescale i.MX6 PCIe controller driver: - Add i.MX8MM support (Richard Zhu) Freescale Layerscape PCIe controller driver: - Use DWC common ops instead of layerscape-specific link-up functions (Hou Zhiqiang) Intel VMD host bridge driver: - Honor platform ACPI _OSC feature negotiation for Root Ports below VMD (Kai-Heng Feng) - Add support for Raptor Lake SKUs (Karthik L Gopalakrishnan) - Reset everything below VMD before enumerating to work around failure to enumerate NVMe devices when guest OS reboots (Nirmal Patel) Bridge emulation (used by Marvell Aardvark and MVEBU): - Make emulated ROM BAR read-only by default (Pali Rohár) - Make some emulated legacy PCI bits read-only for PCIe devices (Pali Rohár) - Update reserved bits in emulated PCIe Capability (Pali Rohár) - Allow drivers to emulate different PCIe Capability versions (Pali Rohár) - Set emulated Capabilities List bit for all PCIe devices, since they must have at least a PCIe Capability (Pali Rohár) Marvell Aardvark PCIe controller driver: - Add bridge emulation definitions for PCIe DEVCAP2, DEVCTL2, DEVSTA2, LNKCAP2, LNKCTL2, LNKSTA2, SLTCAP2, SLTCTL2, SLTSTA2 (Pali Rohár) - Add aardvark support for DEVCAP2, DEVCTL2, LNKCAP2 and LNKCTL2 registers (Pali Rohár) - Clear all MSIs at setup to avoid spurious interrupts (Pali Rohár) - Disable bus mastering when unbinding host controller driver (Pali Rohár) - Mask all interrupts when unbinding host controller driver (Pali Rohár) - Fix memory leak in host controller unbind (Pali Rohár) - Assert PERST# when unbinding host controller driver (Pali Rohár) - Disable link training when unbinding host controller driver (Pali Rohár) - Disable common PHY when unbinding host controller driver (Pali Rohár) - Fix resource type checking to check only IORESOURCE_MEM, not IORESOURCE_MEM_64, which is a flavor of IORESOURCE_MEM (Pali Rohár) Marvell MVEBU PCIe controller driver: - Implement pci_remap_iospace() for ARM so mvebu can use devm_pci_remap_iospace() instead of the previous ARM-specific pci_ioremap_io() interface (Pali Rohár) - Use the standard pci_host_probe() instead of the device-specific mvebu_pci_host_probe() (Pali Rohár) - Replace all uses of ARM-specific pci_ioremap_io() with the ARM implementation of the standard pci_remap_iospace() interface and remove pci_ioremap_io() (Pali Rohár) - Skip initializing invalid Root Ports (Pali Rohár) - Check for errors from pci_bridge_emul_init() (Pali Rohár) - Ignore any bridges at non-zero function numbers (Pali Rohár) - Return ~0 data for invalid config read size (Pali Rohár) - Disallow mapping interrupts on emulated bridges (Pali Rohár) - Clear Root Port Memory & I/O Space Enable and Bus Master Enable at initialization (Pali Rohár) - Make type bits in Root Port I/O Base register read-only (Pali Rohár) - Disable Root Port windows when base/limit set to invalid values (Pali Rohár) - Set controller to Root Complex mode (Pali Rohár) - Set Root Port Class Code to PCI Bridge (Pali Rohár) - Update emulated Root Port secondary bus numbers to better reflect the actual topology (Pali Rohár) - Add PCI_BRIDGE_CTL_BUS_RESET support to emulated Root Ports so pci_reset_secondary_bus() can reset connected devices (Pali Rohár) - Add PCI_EXP_DEVCTL Error Reporting Enable support to emulated Root Ports (Pali Rohár) - Add PCI_EXP_RTSTA PME Status bit support to emulated Root Ports (Pali Rohár) - Add DEVCAP2, DEVCTL2 and LNKCTL2 support to emulated Root Ports on Armada XP and newer devices (Pali Rohár) - Export mvebu-mbus.c symbols to allow pci-mvebu.c to be a module (Pali Rohár) - Add support for compiling as a module (Pali Rohár) MediaTek PCIe controller driver: - Assert PERST# for 100ms to allow power and clock to stabilize (qizhong cheng) MediaTek PCIe Gen3 controller driver: - Disable Mediatek DVFSRC voltage request since lack of DVFSRC to respond to the request causes failure to exit L1 PM Substate (Jianjun Wang) MediaTek MT7621 PCIe controller driver: - Declare mt7621_pci_ops static (Sergio Paracuellos) - Give pcibios_root_bridge_prepare() access to host bridge windows (Sergio Paracuellos) - Move MIPS I/O coherency unit setup from driver to pcibios_root_bridge_prepare() (Sergio Paracuellos) - Add missing MODULE_LICENSE() (Sergio Paracuellos) - Allow COMPILE_TEST for all arches (Sergio Paracuellos) Microsoft Hyper-V host bridge driver: - Add hv-internal interfaces to encapsulate arch IRQ dependencies (Sunil Muthuswamy) - Add arm64 Hyper-V vPCI support (Sunil Muthuswamy) Qualcomm PCIe controller driver: - Undo PM setup in qcom_pcie_probe() error handling path (Christophe JAILLET) - Use __be16 type to store return value from cpu_to_be16() (Manivannan Sadhasivam) - Constify static dw_pcie_ep_ops (Rikard Falkeborn) Renesas R-Car PCIe controller driver: - Fix aarch32 abort handler so it doesn't check the wrong bus clock before accessing the host controller (Marek Vasut) TI Keystone PCIe controller driver: - Add register offset for ti,syscon-pcie-id and ti,syscon-pcie-mode DT properties (Kishon Vijay Abraham I) MicroSemi Switchtec management driver: - Add Gen4 automotive device IDs (Kelvin Cao) - Declare state_names[] as static so it's not allocated and initialized for every call (Kelvin Cao) Host controller driver cleanups: - Use of_device_get_match_data(), not of_match_device(), when we only need the device data in altera, artpec6, cadence, designware-plat, dra7xx, keystone, kirin (Fan Fei) - Drop pointless of_device_get_match_data() cast in j721e (Bjorn Helgaas) - Drop redundant struct device * from j721e since struct cdns_pcie already has one (Bjorn Helgaas) - Rename driver structs to *_pcie in intel-gw, iproc, ls-gen4, mediatek-gen3, microchip, mt7621, rcar-gen2, tegra194, uniphier, xgene, xilinx, xilinx-cpm for consistency across drivers (Fan Fei) - Fix invalid address space conversions in hisi, spear13xx (Bjorn Helgaas) Miscellaneous: - Sort Intel Device IDs by value (Andy Shevchenko) - Change Capability offsets to hex to match spec (Baruch Siach) - Correct misspellings (Krzysztof Wilczyński) - Terminate statement with semicolon in pci_endpoint_test.c (Ming Wang)" * tag 'pci-v5.17-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (151 commits) PCI: mt7621: Allow COMPILE_TEST for all arches PCI: mt7621: Add missing MODULE_LICENSE() PCI: mt7621: Move MIPS setup to pcibios_root_bridge_prepare() PCI: Let pcibios_root_bridge_prepare() access bridge->windows PCI: mt7621: Declare mt7621_pci_ops static PCI: brcmstb: Do not turn off WOL regulators on suspend PCI: brcmstb: Add control of subdevice voltage regulators PCI: brcmstb: Add mechanism to turn on subdev regulators PCI: brcmstb: Split brcm_pcie_setup() into two funcs dt-bindings: PCI: Add bindings for Brcmstb EP voltage regulators dt-bindings: PCI: Correct brcmstb interrupts, interrupt-map. PCI: brcmstb: Fix function return value handling PCI: brcmstb: Do not use __GENMASK PCI: brcmstb: Declare 'used' as bitmap, not unsigned long PCI: hv: Add arm64 Hyper-V vPCI support PCI: hv: Make the code arch neutral by adding arch specific interfaces PCI: pciehp: Use down_read/write_nested(reset_lock) to fix lockdep errors x86/PCI: Remove initialization of static variables to false PCI: Use DWORD accesses for LTR, L1 SS to avoid erratum misc: pci_endpoint_test: Terminate statement with semicolon ...
2022-01-15Merge branch 'akpm' (patches from Andrew)Linus Torvalds50-189/+200
Merge misc updates from Andrew Morton: "146 patches. Subsystems affected by this patch series: kthread, ia64, scripts, ntfs, squashfs, ocfs2, vfs, and mm (slab-generic, slab, kmemleak, dax, kasan, debug, pagecache, gup, shmem, frontswap, memremap, memcg, selftests, pagemap, dma, vmalloc, memory-failure, hugetlb, userfaultfd, vmscan, mempolicy, oom-kill, hugetlbfs, migration, thp, ksm, page-poison, percpu, rmap, zswap, zram, cleanups, hmm, and damon)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (146 commits) mm/damon: hide kernel pointer from tracepoint event mm/damon/vaddr: hide kernel pointer from damon_va_three_regions() failure log mm/damon/vaddr: use pr_debug() for damon_va_three_regions() failure logging mm/damon/dbgfs: remove an unnecessary variable mm/damon: move the implementation of damon_insert_region to damon.h mm/damon: add access checking for hugetlb pages Docs/admin-guide/mm/damon/usage: update for schemes statistics mm/damon/dbgfs: support all DAMOS stats Docs/admin-guide/mm/damon/reclaim: document statistics parameters mm/damon/reclaim: provide reclamation statistics mm/damon/schemes: account how many times quota limit has exceeded mm/damon/schemes: account scheme actions that successfully applied mm/damon: remove a mistakenly added comment for a future feature Docs/admin-guide/mm/damon/usage: update for kdamond_pid and (mk|rm)_contexts Docs/admin-guide/mm/damon/usage: mention tracepoint at the beginning Docs/admin-guide/mm/damon/usage: remove redundant information Docs/admin-guide/mm/damon/usage: update for scheme quotas and watermarks mm/damon: convert macro functions to static inline functions mm/damon: modify damon_rand() macro to static inline function mm/damon: move damon_rand() definition into damon.h ...
2022-01-15Replace for_each_*_bit_from() with for_each_*_bit() where appropriateYury Norov1-2/+2
A couple of kernel functions call for_each_*_bit_from() with start bit equal to 0. Replace them with for_each_*_bit(). No functional changes, but might improve on readability. Signed-off-by: Yury Norov <yury.norov@gmail.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
2022-01-15all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriateYury Norov2-3/+3
find_first{,_zero}_bit is a more effective analogue of 'next' version if start == 0. This patch replaces 'next' with 'first' where things look trivial. Signed-off-by: Yury Norov <yury.norov@gmail.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
2022-01-15arch: remove GENERIC_FIND_FIRST_BIT entirelyYury Norov6-6/+0
In 5.12 cycle we enabled GENERIC_FIND_FIRST_BIT config option for ARM64 and MIPS. It increased performance and shrunk .text size; and so far I didn't receive any negative feedback on the change. https://lore.kernel.org/linux-arch/20210225135700.1381396-1-yury.norov@gmail.com/ Now I think it's a good time to switch all architectures to use find_{first,last}_bit() unconditionally, and so remove corresponding config option. The patch does't introduce functioal changes for arc, arm, arm64, mips, m68k, s390 and x86, for other architectures I expect improvement both in performance and .text size. Signed-off-by: Yury Norov <yury.norov@gmail.com> Tested-by: Alexander Lobakin <alobakin@pm.me> (mips) Reviewed-by: Alexander Lobakin <alobakin@pm.me> (mips) Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Will Deacon <will@kernel.org> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
2022-01-15include: move find.h from asm_generic to linuxYury Norov20-26/+0
find_bit API and bitmap API are closely related, but inclusion paths are different - include/asm-generic and include/linux, correspondingly. In the past it made a lot of troubles due to circular dependencies and/or undefined symbols. Fix this by moving find.h under include/linux. Signed-off-by: Yury Norov <yury.norov@gmail.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2022-01-15mm/mempolicy: wire up syscall set_mempolicy_home_nodeAneesh Kumar K.V18-1/+19
Link: https://lkml.kernel.org/r/20211202123810.267175-4-aneesh.kumar@linux.ibm.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Ben Widawsky <ben.widawsky@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Feng Tang <feng.tang@intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: <linux-api@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15x86: mm: add x86_64 support for page table checkPasha Tatashin2-2/+28
Add page table check hooks into routines that modify user page tables. Link: https://lkml.kernel.org/r/20211221154650.1047963-5-pasha.tatashin@soleen.com Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Greg Thelen <gthelen@google.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Slaby <jirislaby@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <keescook@chromium.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Paul Turner <pjt@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sami Tolvanen <samitolvanen@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Xu <weixugc@google.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15mm: page table checkPasha Tatashin1-0/+3
Check user page table entries at the time they are added and removed. Allows to synchronously catch memory corruption issues related to double mapping. When a pte for an anonymous page is added into page table, we verify that this pte does not already point to a file backed page, and vice versa if this is a file backed page that is being added we verify that this page does not have an anonymous mapping We also enforce that read-only sharing for anonymous pages is allowed (i.e. cow after fork). All other sharing must be for file pages. Page table check allows to protect and debug cases where "struct page" metadata became corrupted for some reason. For example, when refcnt or mapcount become invalid. Link: https://lkml.kernel.org/r/20211221154650.1047963-4-pasha.tatashin@soleen.com Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Greg Thelen <gthelen@google.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Slaby <jirislaby@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <keescook@chromium.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Paul Turner <pjt@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sami Tolvanen <samitolvanen@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Xu <weixugc@google.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15mm: move tlb_flush_pending inline helpers to mm_inline.hArnd Bergmann1-1/+1
linux/mm_types.h should only define structure definitions, to make it cheap to include elsewhere. The atomic_t helper function definitions are particularly large, so it's better to move the helpers using those into the existing linux/mm_inline.h and only include that where needed. As a follow-up, we may want to go through all the indirect includes in mm_types.h and reduce them as much as possible. Link: https://lkml.kernel.org/r/20211207125710.2503446-2-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Colin Cross <ccross@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Peter Xu <peterx@redhat.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Yu Zhao <yuzhao@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Eric Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15mm: remove redundant check about FAULT_FLAG_ALLOW_RETRY bitQi Zheng22-168/+134
Since commit 4064b9827063 ("mm: allow VM_FAULT_RETRY for multiple times") allowed VM_FAULT_RETRY for multiple times, the FAULT_FLAG_ALLOW_RETRY bit of fault_flag will not be changed in the page fault path, so the following check is no longer needed: flags & FAULT_FLAG_ALLOW_RETRY So just remove it. [akpm@linux-foundation.org: coding style fixes] Link: https://lkml.kernel.org/r/20211110123358.36511-1-zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: David Hildenbrand <david@redhat.com> Cc: Kirill Shutemov <kirill@shutemov.name> Cc: Peter Xu <peterx@redhat.com> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15mm: defer kmemleak object creation of module_alloc()Kefeng Wang3-7/+9
Yongqiang reports a kmemleak panic when module insmod/rmmod with KASAN enabled(without KASAN_VMALLOC) on x86[1]. When the module area allocates memory, it's kmemleak_object is created successfully, but the KASAN shadow memory of module allocation is not ready, so when kmemleak scan the module's pointer, it will panic due to no shadow memory with KASAN check. module_alloc __vmalloc_node_range kmemleak_vmalloc kmemleak_scan update_checksum kasan_module_alloc kmemleak_ignore Note, there is no problem if KASAN_VMALLOC enabled, the modules area entire shadow memory is preallocated. Thus, the bug only exits on ARCH which supports dynamic allocation of module area per module load, for now, only x86/arm64/s390 are involved. Add a VM_DEFER_KMEMLEAK flags, defer vmalloc'ed object register of kmemleak in module_alloc() to fix this issue. [1] https://lore.kernel.org/all/6d41e2b9-4692-5ec4-b1cd-cbe29ae89739@huawei.com/ [wangkefeng.wang@huawei.com: fix build] Link: https://lkml.kernel.org/r/20211125080307.27225-1-wangkefeng.wang@huawei.com [akpm@linux-foundation.org: simplify ifdefs, per Andrey] Link: https://lkml.kernel.org/r/CA+fCnZcnwJHUQq34VuRxpdoY6_XbJCDJ-jopksS5Eia4PijPzw@mail.gmail.com Link: https://lkml.kernel.org/r/20211124142034.192078-1-wangkefeng.wang@huawei.com Fixes: 793213a82de4 ("s390/kasan: dynamic shadow mem allocation for modules") Fixes: 39d114ddc682 ("arm64: add KASAN support") Fixes: bebf56a1b176 ("kasan: enable instrumentation of global variables") Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Reported-by: Yongqiang Liu <liuyongqiang13@huawei.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Alexander Potapenko <glider@google.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15ia64: topology: use default_groups in kobj_typeGreg Kroah-Hartman1-1/+2
There are currently two ways to create a set of sysfs files for a kobj_type, through the default_attrs field, and the default_groups field. Move the ia64 topology sysfs code to use default_groups field which has been the preferred way since aa30f47cf666 ("kobject: Add support for default attribute groups to kobj_type") so that we can soon get rid of the obsolete default_attrs field. Link: https://lkml.kernel.org/r/20220104154800.1287947-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15ia64: fix typo in a commentJason Wang1-1/+1
The double `the' in a comment is repeated, thus it should be removed. Link: https://lkml.kernel.org/r/20211113030316.22650-1-wangborong@cdjrlc.com Signed-off-by: Jason Wang <wangborong@cdjrlc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15arch/ia64/kernel/setup.c: use swap() to make code cleanerYang Guang1-4/+1
Use the macro 'swap()' defined in 'include/linux/minmax.h' to avoid opencoding it. Link: https://lkml.kernel.org/r/20211104001908.695110-1-yang.guang5@zte.com.cn Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Yang Guang <yang.guang5@zte.com.cn> Cc: David Yang <davidcomponentone@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15ia64: module: use swap() to make code cleanerYang Guang1-4/+2
Use the macro 'swap()' defined in 'include/linux/minmax.h' to avoid opencoding it. Link: https://lkml.kernel.org/r/20211104062642.1506539-1-yang.guang5@zte.com.cn Signed-off-by: Yang Guang <yang.guang5@zte.com.cn> Reported-by: Zeal Robot <zealci@zte.com.cn> Cc: David Yang <davidcomponentone@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15powerpc/audit: Fix syscall_get_arch()Christophe Leroy2-2/+4
Commit 770cec16cdc9 ("powerpc/audit: Simplify syscall_get_arch()") and commit 898a1ef06ad4 ("powerpc/audit: Avoid unneccessary #ifdef in syscall_get_arguments()") replaced test_tsk_thread_flag(task, TIF_32BIT)) by is_32bit_task(). But is_32bit_task() applies on current task while be want the test done on task 'task' So add a new macro is_tsk_32bit_task() to check any task. Fixes: 770cec16cdc9 ("powerpc/audit: Simplify syscall_get_arch()") Fixes: 898a1ef06ad4 ("powerpc/audit: Avoid unneccessary #ifdef in syscall_get_arguments()") Cc: stable@vger.kernel.org Reported-by: Dmitry V. Levin <ldv@altlinux.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/c55cddb8f65713bf5859ed675d75a50cb37d5995.1642159570.git.christophe.leroy@csgroup.eu
2022-01-15powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06Naveen N. Rao2-9/+14
Johan reported the below crash with test_bpf on ppc64 e5500: test_bpf: #296 ALU_END_FROM_LE 64: 0x0123456789abcdef -> 0x67452301 jited:1 Oops: Exception in kernel mode, sig: 4 [#1] BE PAGE_SIZE=4K SMP NR_CPUS=24 QEMU e500 Modules linked in: test_bpf(+) CPU: 0 PID: 76 Comm: insmod Not tainted 5.14.0-03771-g98c2059e008a-dirty #1 NIP: 8000000000061c3c LR: 80000000006dea64 CTR: 8000000000061c18 REGS: c0000000032d3420 TRAP: 0700 Not tainted (5.14.0-03771-g98c2059e008a-dirty) MSR: 0000000080089000 <EE,ME> CR: 88002822 XER: 20000000 IRQMASK: 0 <...> NIP [8000000000061c3c] 0x8000000000061c3c LR [80000000006dea64] .__run_one+0x104/0x17c [test_bpf] Call Trace: .__run_one+0x60/0x17c [test_bpf] (unreliable) .test_bpf_init+0x6a8/0xdc8 [test_bpf] .do_one_initcall+0x6c/0x28c .do_init_module+0x68/0x28c .load_module+0x2460/0x2abc .__do_sys_init_module+0x120/0x18c .system_call_exception+0x110/0x1b8 system_call_common+0xf0/0x210 --- interrupt: c00 at 0x101d0acc <...> ---[ end trace 47b2bf19090bb3d0 ]--- Illegal instruction The illegal instruction turned out to be 'ldbrx' emitted for BPF_FROM_[L|B]E, which was only introduced in ISA v2.06. Guard use of the same and implement an alternative approach for older processors. Fixes: 156d0e290e969c ("powerpc/ebpf/jit: Implement JIT compiler for extended BPF") Reported-by: Johan Almbladh <johan.almbladh@anyfinetworks.com> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Tested-by: Johan Almbladh <johan.almbladh@anyfinetworks.com> Acked-by: Johan Almbladh <johan.almbladh@anyfinetworks.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/d1e51c6fdf572062cf3009a751c3406bda01b832.1641468127.git.naveen.n.rao@linux.vnet.ibm.com
2022-01-15powerpc/bpf: Update ldimm64 instructions during extra passNaveen N. Rao3-7/+35
These instructions are updated after the initial JIT, so redo codegen during the extra pass. Rename bpf_jit_fixup_subprog_calls() to clarify that this is more than just subprog calls. Fixes: 69c087ba6225b5 ("bpf: Add bpf_for_each_map_elem() helper") Cc: stable@vger.kernel.org # v5.15 Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Tested-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/7cc162af77ba918eb3ecd26ec9e7824bc44b1fae.1641468127.git.naveen.n.rao@linux.vnet.ibm.com
2022-01-15powerpc32/bpf: Fix codegen for bpf-to-bpf callsNaveen N. Rao1-0/+3
Pad instructions emitted for BPF_CALL so that the number of instructions generated does not change for different function addresses. This is especially important for calls to other bpf functions, whose address will only be known during extra pass. Fixes: 51c66ad849a703 ("powerpc/bpf: Implement extended BPF on PPC32") Cc: stable@vger.kernel.org # v5.13+ Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/52d8fe51f7620a6f27f377791564d79d75463576.1641468127.git.naveen.n.rao@linux.vnet.ibm.com
2022-01-15virtio: wrap config->reset callsMichael S. Tsirkin1-1/+1
This will enable cleanups down the road. The idea is to disable cbs, then add "flush_queued_cbs" callback as a parameter, this way drivers can flush any work queued after callbacks have been disabled. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/r/20211013105226.20225-1-mst@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-01-14x86/fpu: Fix inline prefix warningsYang Zhong2-2/+2
Fix sparse warnings in xstate and remove inline prefix. Fixes: 980fe2fddcff ("x86/fpu: Extend fpu_xstate_prctl() with guest permissions") Signed-off-by: Yang Zhong <yang.zhong@intel.com> Reported-by: kernel test robot <lkp@intel.com> Message-Id: <20220113180825.322333-1-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Disable interception for IA32_XFD on demandKevin Tian4-6/+29
Always intercepting IA32_XFD causes non-negligible overhead when this register is updated frequently in the guest. Disable r/w emulation after intercepting the first WRMSR(IA32_XFD) with a non-zero value. Disable WRMSR emulation implies that IA32_XFD becomes out-of-sync with the software states in fpstate and the per-cpu xfd cache. This leads to two additional changes accordingly: - Call fpu_sync_guest_vmexit_xfd_state() after vm-exit to bring software states back in-sync with the MSR, before handle_exit_irqoff() is called. - Always trap #NM once write interception is disabled for IA32_XFD. The #NM exception is rare if the guest doesn't use dynamic features. Otherwise, there is at most one exception per guest task given a dynamic feature. p.s. We have confirmed that SDM is being revised to say that when setting IA32_XFD[18] the AMX register state is not guaranteed to be preserved. This clarification avoids adding mess for a creative guest which sets IA32_XFD[18]=1 before saving active AMX state to its own storage. Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-22-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14x86/fpu: Provide fpu_sync_guest_vmexit_xfd_state()Thomas Gleixner2-0/+26
KVM can disable the write emulation for the XFD MSR when the vCPU's fpstate is already correctly sized to reduce the overhead. When write emulation is disabled the XFD MSR state after a VMEXIT is unknown and therefore not in sync with the software states in fpstate and the per CPU XFD cache. Provide fpu_sync_guest_vmexit_xfd_state() which has to be invoked after a VMEXIT before enabling interrupts when write emulation is disabled for the XFD MSR. It could be invoked unconditionally even when write emulation is enabled for the price of a pointless MSR read. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-21-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Add support for getting/setting expanded xstate bufferGuang Zeng4-3/+62
With KVM_CAP_XSAVE, userspace uses a hardcoded 4KB buffer to get/set xstate data from/to KVM. This doesn't work when dynamic xfeatures (e.g. AMX) are exposed to the guest as they require a larger buffer size. Introduce a new capability (KVM_CAP_XSAVE2). Userspace VMM gets the required xstate buffer size via KVM_CHECK_EXTENSION(KVM_CAP_XSAVE2). KVM_SET_XSAVE is extended to work with both legacy and new capabilities by doing properly-sized memdup_user() based on the guest fpu container. KVM_GET_XSAVE is kept for backward-compatible reason. Instead, KVM_GET_XSAVE2 is introduced under KVM_CAP_XSAVE2 as the preferred interface for getting xstate buffer (4KB or larger size) from KVM (Link: https://lkml.org/lkml/2021/12/15/510) Also, update the api doc with the new KVM_GET_XSAVE2 ioctl. Signed-off-by: Guang Zeng <guang.zeng@intel.com> Signed-off-by: Wei Wang <wei.w.wang@intel.com> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-19-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14x86/fpu: Add uabi_size to guest_fpuThomas Gleixner3-0/+7
Userspace needs to inquire KVM about the buffer size to work with the new KVM_SET_XSAVE and KVM_GET_XSAVE2. Add the size info to guest_fpu for KVM to access. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Wei Wang <wei.w.wang@intel.com> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-18-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Add CPUID support for Intel AMXJing Liu2-2/+27
Extend CPUID emulation to support XFD, AMX_TILE, AMX_INT8 and AMX_BF16. Adding those bits into kvm_cpu_caps finally activates all previous logics in this series. Hide XFD on 32bit host kernels. Otherwise it leads to a weird situation where KVM tells userspace to migrate MSR_IA32_XFD and then rejects attempts to read/write the MSR. Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-17-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Add XCR0 support for Intel AMXJing Liu1-1/+6
Two XCR0 bits are defined for AMX to support XSAVE mechanism. Bit 17 is for tilecfg and bit 18 is for tiledata. The value of XCR0[17:18] is always either 00b or 11b. Also, SDM recommends that only 64-bit operating systems enable Intel AMX by setting XCR0[18:17]. 32-bit host kernel never sets the tile bits in vcpu->arch.guest_supported_xcr0. Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-16-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Disable RDMSR interception of IA32_XFD_ERRJing Liu2-1/+7
This saves one unnecessary VM-exit in guest #NM handler, given that the MSR is already restored with the guest value before the guest is resumed. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-15-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Emulate IA32_XFD_ERR for guestJing Liu1-1/+20
Emulate read/write to IA32_XFD_ERR MSR. Only the saved value in the guest_fpu container is touched in the emulation handler. Actual MSR update is handled right before entering the guest (with preemption disabled) Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Zeng Guang <guang.zeng@intel.com> Signed-off-by: Wei Wang <wei.w.wang@intel.com> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-14-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Intercept #NM for saving IA32_XFD_ERRJing Liu3-0/+59
Guest IA32_XFD_ERR is generally modified in two places: - Set by CPU when #NM is triggered; - Cleared by guest in its #NM handler; Intercept #NM for the first case when a nonzero value is written to IA32_XFD. Nonzero indicates that the guest is willing to do dynamic fpstate expansion for certain xfeatures, thus KVM needs to manage and virtualize guest XFD_ERR properly. The vcpu exception bitmap is updated in XFD write emulation according to guest_fpu::xfd. Save the current XFD_ERR value to the guest_fpu container in the #NM VM-exit handler. This must be done with interrupt disabled, otherwise the unsaved MSR value may be clobbered by host activity. The saving operation is conducted conditionally only when guest_fpu:xfd includes a non-zero value. Doing so also avoids misread on a platform which doesn't support XFD but #NM is triggered due to L1 interception. Queueing #NM to the guest is postponed to handle_exception_nmi(). This goes through the nested_vmx check so a virtual vmexit is queued instead when #NM is triggered in L2 but L1 wants to intercept it. Restore the host value (always ZERO outside of the host #NM handler) before enabling interrupt. Restore the guest value from the guest_fpu container right before entering the guest (with interrupt disabled). Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-13-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14x86/fpu: Prepare xfd_err in struct fpu_guestJing Liu1-0/+5
When XFD causes an instruction to generate #NM, IA32_XFD_ERR contains information about which disabled state components are being accessed. The #NM handler is expected to check this information and then enable the state components by clearing IA32_XFD for the faulting task (if having permission). If the XFD_ERR value generated in guest is consumed/clobbered by the host before the guest itself doing so, it may lead to non-XFD-related #NM treated as XFD #NM in host (due to non-zero value in XFD_ERR), or XFD-related #NM treated as non-XFD #NM in guest (XFD_ERR cleared by the host #NM handler). Introduce a new field in fpu_guest to save the guest xfd_err value. KVM is expected to save guest xfd_err before interrupt is enabled and restore it right before entering the guest (with interrupt disabled). Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-12-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Add emulation for IA32_XFDJing Liu1-0/+27
Intel's eXtended Feature Disable (XFD) feature allows the software to dynamically adjust fpstate buffer size for XSAVE features which have large state. Because guest fpstate has been expanded for all possible dynamic xstates at KVM_SET_CPUID2, emulation of the IA32_XFD MSR is straightforward. For write just call fpu_update_guest_xfd() to update the guest fpu container once all the sanity checks are passed. For read simply return the cached value in the container. Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Zeng Guang <guang.zeng@intel.com> Signed-off-by: Wei Wang <wei.w.wang@intel.com> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-11-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14x86/fpu: Provide fpu_update_guest_xfd() for IA32_XFD emulationKevin Tian2-0/+18
Guest XFD can be updated either in the emulation path or in the restore path. Provide a wrapper to update guest_fpu::fpstate::xfd. If the guest fpstate is currently in-use, also update the per-cpu xfd cache and the actual MSR. Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-10-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14kvm: x86: Enable dynamic xfeatures at KVM_SET_CPUID2Jing Liu1-13/+29
KVM can request fpstate expansion in two approaches: 1) When intercepting guest updates to XCR0 and XFD MSR; 2) Before vcpu runs (e.g. at KVM_SET_CPUID2); The first option doesn't waste memory for legacy guest if it doesn't support XFD. However doing so introduces more complexity and also imposes an order requirement in the restoring path, i.e. XCR0/XFD must be restored before XSTATE. Given that the agreement is to do the static approach. This is considered a better tradeoff though it does waste 8K memory for legacy guest if its CPUID includes dynamically-enabled xfeatures. Successful fpstate expansion requires userspace VMM to acquire guest xstate permissions before calling KVM_SET_CPUID2. Also take the chance to adjust the indent in kvm_set_cpuid(). Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-9-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14x86/fpu: Provide fpu_enable_guest_xfd_features() for KVMSean Christopherson2-0/+23
Provide a wrapper for expanding the guest fpstate buffer according to requested xfeatures. KVM wants to call this wrapper to manage any dynamic xstate used by the guest. Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20220105123532.12586-8-yang.zhong@intel.com> [Remove unnecessary 32-bit check. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14x86/fpu: Add guest support to xfd_enable_feature()Thomas Gleixner2-39/+60
Guest support for dynamically enabled FPU features requires a few modifications to the enablement function which is currently invoked from the #NM handler: 1) Use guest permissions and sizes for the update 2) Update fpu_guest state accordingly 3) Take into account that the enabling can be triggered either from a running guest via XSETBV and MSR_IA32_XFD write emulation or from a guest restore. In the latter case the guests fpstate is not the current tasks active fpstate. Split the function and implement the guest mechanics throughout the callchain. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-7-yang.zhong@intel.com> [Add 32-bit stub for __xfd_enable_feature. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14x86/fpu: Make XFD initialization in __fpstate_reset() a function argumentJing Liu1-5/+6
vCPU threads are different from native tasks regarding to the initial XFD value. While all native tasks follow a fixed value (init_fpstate::xfd) established by the FPU core at boot, vCPU threads need to obey the reset value (i.e. ZERO) defined by the specification, to meet the expectation of the guest. Let the caller supply an argument and adjust the host and guest related invocations accordingly. Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jing Liu <jing2.liu@intel.com> Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20220105123532.12586-6-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14Merge tag 'for-linus' of git://github.com/openrisc/linuxLinus Torvalds4-14/+20
Pull OpenRISC updates from Stafford Horne: "A few fixups and enhancements for OpenRISC: - Fix to add proper wrapper for clone3 to save callee saved regs - Cleanups for clone, fork and switch - Add support for common clk so OpenRISC and use more drivers" * tag 'for-linus' of git://github.com/openrisc/linux: openrisc: init: Add support for common clk openrisc: Add clone3 ABI wrapper openrisc: Use delay slot for clone and fork wrappers openrisc: Cleanup switch code and comments
2022-01-14Merge tag 'powerpc-5.17-1' of ↵Linus Torvalds355-3419/+5408
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Optimise radix KVM guest entry/exit by 2x on Power9/Power10. - Allow firmware to tell us whether to disable the entry and uaccess flushes on Power10 or later CPUs. - Add BPF_PROBE_MEM support for 32 and 64-bit BPF jits. - Several fixes and improvements to our hard lockup watchdog. - Activate HAVE_DYNAMIC_FTRACE_WITH_REGS on 32-bit. - Allow building the 64-bit Book3S kernel without hash MMU support, ie. Radix only. - Add KUAP (SMAP) support for 40x, 44x, 8xx, Book3E (64-bit). - Add new encodings for perf_mem_data_src.mem_hops field, and use them on Power10. - A series of small performance improvements to 64-bit interrupt entry. - Several commits fixing issues when building with the clang integrated assembler. - Many other small features and fixes. Thanks to Alan Modra, Alexey Kardashevskiy, Ammar Faizi, Anders Roxell, Arnd Bergmann, Athira Rajeev, Cédric Le Goater, Christophe JAILLET, Christophe Leroy, Christoph Hellwig, Daniel Axtens, David Yang, Erhard Furtner, Fabiano Rosas, Greg Kroah-Hartman, Guo Ren, Hari Bathini, Jason Wang, Joel Stanley, Julia Lawall, Kajol Jain, Kees Cook, Laurent Dufour, Madhavan Srinivasan, Mark Brown, Minghao Chi, Nageswara R Sastry, Naresh Kamboju, Nathan Chancellor, Nathan Lynch, Nicholas Piggin, Nick Child, Oliver O'Halloran, Peiwei Hu, Randy Dunlap, Ravi Bangoria, Rob Herring, Russell Currey, Sachin Sant, Sean Christopherson, Segher Boessenkool, Thadeu Lima de Souza Cascardo, Tyrel Datwyler, Xiang wangx, and Yang Guang. * tag 'powerpc-5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (240 commits) powerpc/xmon: Dump XIVE information for online-only processors. powerpc/opal: use default_groups in kobj_type powerpc/cacheinfo: use default_groups in kobj_type powerpc/sched: Remove unused TASK_SIZE_OF powerpc/xive: Add missing null check after calling kmalloc powerpc/floppy: Remove usage of the deprecated "pci-dma-compat.h" API selftests/powerpc: Add a test of sigreturning to an unaligned address powerpc/64s: Use EMIT_WARN_ENTRY for SRR debug warnings powerpc/64s: Mask NIP before checking against SRR0 powerpc/perf: Fix spelling of "its" powerpc/32: Fix boot failure with GCC latent entropy plugin powerpc/code-patching: Replace patch_instruction() by ppc_inst_write() in selftests powerpc/code-patching: Move code patching selftests in its own file powerpc/code-patching: Move instr_is_branch_{i/b}form() in code-patching.h powerpc/code-patching: Move patch_exception() outside code-patching.c powerpc/code-patching: Use test_trampoline for prefixed patch test powerpc/code-patching: Fix patch_branch() return on out-of-range failure powerpc/code-patching: Reorganise do_patch_instruction() to ease error handling powerpc/code-patching: Fix unmap_patch_area() error handling powerpc/code-patching: Fix error handling in do_patch_instruction() ...
2022-01-14KVM: arm64: pkvm: Use the mm_ops indirection for cache maintenanceMarc Zyngier1-12/+6
CMOs issued from EL2 cannot directly use the kernel helpers, as EL2 doesn't have a mapping of the guest pages. Oops. Instead, use the mm_ops indirection to use helpers that will perform a mapping at EL2 and allow the CMO to be effective. Fixes: 25aa28691bb9 ("KVM: arm64: Move guest CMOs to the fault handlers") Reviewed-by: Quentin Perret <qperret@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20220114125038.1336965-1-maz@kernel.org
2022-01-14Merge tag 'mips_5.17' of ↵Linus Torvalds77-3688/+434
git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull MIPS updates from Thomas Bogendoerfer: - add support for more BCM47XX based devices - add MIPS support for brcmstb PCIe controller - add Loongson 2K1000 reset driver - remove board support for rbtx4938/rbtx4939 - remove support for TX4939 SoCs - fixes and cleanups * tag 'mips_5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (59 commits) MIPS: ath79: drop _machine_restart again PCI: brcmstb: Augment driver for MIPs SOCs MIPS: bmips: Remove obsolete DMA mapping support MIPS: bmips: Add support PCIe controller device nodes dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs MIPS: compressed: Fix build with ZSTD compression MIPS: BCM47XX: Add support for Netgear WN2500RP v1 & v2 MIPS: BCM47XX: Add support for Netgear R6300 v1 MIPS: BCM47XX: Add LEDs and buttons for Asus RTN-10U MIPS: BCM47XX: Add board entry for Linksys WRT320N v1 MIPS: BCM47XX: Define Linksys WRT310N V2 buttons MIPS: Remove duplicated include in local.h MIPS: retire "asm/llsc.h" MIPS: rework local_t operation on MIPS64 MIPS: fix local_{add,sub}_return on MIPS64 mips/pci: remove redundant ret variable MIPS: Loongson64: Add missing of_node_put() in ls2k_reset_init() MIPS: new Kconfig option ZBOOT_LOAD_ADDRESS MIPS: enable both vmlinux.gz.itb and vmlinuz for generic MIPS: signal: Return immediately if call fails ...
2022-01-14Merge tag 'sound-5.17-rc1' of ↵Linus Torvalds1-3/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound updates from Takashi Iwai: "It's a relatively calm development cycle, but still lots of updates in the driver side like Intel SOF. Below are some highlights: ALSA / ASoC core: - A new kselftest for ALSA control API - PCM NO_REWINDS support - Potential race fixes around control removals - Unify x86 SG-buffer memory allocation code - Cleanups and race fixes for ASoC DPCM locking ASoC: - Refinements and cleanups around the delay() APIs - Wider use of dev_err_probe(). - Continuing cleanups and improvements to the SOF code - Support for pin switches in simple-card derived cards - Support for AMD Renoir ACP, Asahi Kasei Microdevices AKM4375, Intel systems using NAU8825 and MAX98390, Mediatek MT8915, nVidia Tegra20 S/PDIF, Qualcomm systems using ALC5682I-VS and Texas Instruments TLV320ADC3xxx HD-audio / USB-audio: - Fix deadlock at HD-audio codec unbinding - Fixes for Tegra194 HD-audio, new HDA support for CS35L41 codec - Quirks for Lenovo and HP machines, Gigabyte mobo, Bose device Misc: - Fix virmidi drain behavior Note that the merge of CS35L41 codec support is still half-baked, and at least one ACPI change is missing. Although this won't hinder the kernel build itself, we're going to catch up before RC1" * tag 'sound-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (415 commits) ALSA: hda: intel-dsp-config: reorder the config table ALSA: hda: intel-dsp-config: add JasperLake support ALSA: hda: cs35l41: fix double free on error in probe() ALSA: hda: Fix dependencies of CS35L41 on SPI/I2C buses ALSA: hda: Fix dependency on ASoC cs35l41 codec ASoC: cs35l41: Add support for hibernate memory retention mode ASoC: cs35l41: Update handling of test key registers ALSA: intel_hdmi: Check for error num after setting mask ASoC: wcd9335: Keep a RX port value for each SLIM RX mux ASoC: amd: acp: acp-mach: Change default RT1019 amp dev id ALSA: virmidi: Remove duplicated code ALSA: seq: virmidi: Add a drain operation ASoC: topology: Fix typo ASoC: fsl_asrc: refine the check of available clock divider ASoC: Intel: bytcr_rt5640: Add support for external GPIO jack-detect ASoC: Intel: bytcr_rt5640: Support retrieving the codec IRQ from the AMCR0F28 ACPI dev ASoC: rt5640: Add support for boards with an external jack-detect GPIO ASoC: rt5640: Allow snd_soc_component_set_jack() to override the codec IRQ ASoC: rt5640: Change jack_work to a delayed_work ASoC: rt5640: Fix possible NULL pointer deref on resume ...
2022-01-13arch: decompressor: remove useless vmlinux.bin.all-yMasahiro Yamada3-24/+18
Presumably, arch/{parisc,s390,sh}/boot/compressed/Makefile copied arch/x86/boot/compressed/Makefile, but vmlinux.bin.all-y is useless here because it is the same as $(obj)/vmlinux.bin. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <n.schier@avm.de>
2022-01-13kbuild: rename cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22}Masahiro Yamada7-32/+34
GZIP-compressed files end with 4 byte data that represents the size of the original input. The decompressors (the self-extracting kernel) exploit it to know the vmlinux size beforehand. To mimic the GZIP's trailer, Kbuild provides cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22}. Unfortunately these macros are used everywhere despite the appended size data is only useful for the decompressors. There is no guarantee that such hand-crafted trailers are safely ignored. In fact, the kernel refuses compressed initramdfs with the garbage data. That is why usr/Makefile overrides size_append to make it no-op. To limit the use of such broken compressed files, this commit renames the existing macros as follows: cmd_bzip2 --> cmd_bzip2_with_size cmd_lzma --> cmd_lzma_with_size cmd_lzo --> cmd_lzo_with_size cmd_lz4 --> cmd_lz4_with_size cmd_xzkern --> cmd_xzkern_with_size cmd_zstd22 --> cmd_zstd22_with_size To keep the decompressors working, I updated the following Makefiles accordingly: arch/arm/boot/compressed/Makefile arch/h8300/boot/compressed/Makefile arch/mips/boot/compressed/Makefile arch/parisc/boot/compressed/Makefile arch/s390/boot/compressed/Makefile arch/sh/boot/compressed/Makefile arch/x86/boot/compressed/Makefile I reused the current macro names for the normal usecases; they produce the compressed data in the proper format. I did not touch the following: arch/arc/boot/Makefile arch/arm64/boot/Makefile arch/csky/boot/Makefile arch/mips/boot/Makefile arch/riscv/boot/Makefile arch/sh/boot/Makefile kernel/Makefile This means those Makefiles will stop appending the size data. I dropped the 'override size_append' hack from usr/Makefile. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <n.schier@avm.de>
2022-01-13sh: rename suffix-y to suffix_yMasahiro Yamada2-9/+9
'export suffix-y' does not work reliably because hyphens are disallowed in shell variables. A similar issue was fixed by commit 2bfbe7881ee0 ("kbuild: Do not use hyphen in exported variable name"). If I do similar in dash, ARCH=sh fails to build. $ mv linux linux~ $ cd linux~ $ dash $ make O=foo/bar ARCH=sh CROSS_COMPILE=sh4-linux-gnu- defconfig all make[1]: Entering directory '/home/masahiro/linux~/foo/bar' [ snip ] make[4]: *** No rule to make target 'arch/sh/boot/compressed/vmlinux.bin.', needed by 'arch/sh/boot/compressed/piggy.o'. Stop. make[3]: *** [/home/masahiro/linux~/arch/sh/boot/Makefile:40: arch/sh/boot/compressed/vmlinux] Error 2 make[2]: *** [/home/masahiro/linux~/arch/sh/Makefile:194: zImage] Error 2 make[1]: *** [/home/masahiro/linux~/Makefile:350: __build_one_by_one] Error 2 make[1]: Leaving directory '/home/masahiro/linux~/foo/bar' make: *** [Makefile:219: __sub-make] Error 2 The maintainer of GNU Make stated that there is no consistent way to export variables that do not meet the shell's naming criteria. (https://savannah.gnu.org/bugs/?55719) Consequently, you cannot use hyphens in exported variables. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <n.schier@avm.de>
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