linux/drivers/virt/coco, branch v6.18

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2025-09-30T01:48:39Z

Pull arm64 updates from Will Deacon: "There's good stuff across the board, including some nice mm improvements for CPUs with the 'noabort' BBML2 feature and a clever patch to allow ptdump to play nicely with block mappings in the vmalloc area. Confidential computing: - Add support for accepting secrets from firmware (e.g. ACPI CCEL) and mapping them with appropriate attributes. CPU features: - Advertise atomic floating-point instructions to userspace - Extend Spectre workarounds to cover additional Arm CPU variants - Extend list of CPUs that support break-before-make level 2 and guarantee not to generate TLB conflict aborts for changes of mapping granularity (BBML2_NOABORT) - Add GCS support to our uprobes implementation. Documentation: - Remove bogus SME documentation concerning register state when entering/exiting streaming mode. Entry code: - Switch over to the generic IRQ entry code (GENERIC_IRQ_ENTRY) - Micro-optimise syscall entry path with a compiler branch hint. Memory management: - Enable huge mappings in vmalloc space even when kernel page-table dumping is enabled - Tidy up the types used in our early MMU setup code - Rework rodata= for closer parity with the behaviour on x86 - For CPUs implementing BBML2_NOABORT, utilise block mappings in the linear map even when rodata= applies to virtual aliases - Don't re-allocate the virtual region between '_text' and '_stext', as doing so confused tools parsing /proc/vmcore. Miscellaneous: - Clean-up Kconfig menuconfig text for architecture features - Avoid redundant bitmap_empty() during determination of supported SME vector lengths - Re-enable warnings when building the 32-bit vDSO object - Avoid breaking our eggs at the wrong end. Perf and PMUs: - Support for v3 of the Hisilicon L3C PMU - Support for Hisilicon's MN and NoC PMUs - Support for Fujitsu's Uncore PMU - Support for SPE's extended event filtering feature - Preparatory work to enable data source filtering in SPE - Support for multiple lanes in the DWC PCIe PMU - Support for i.MX94 in the IMX DDR PMU driver - MAINTAINERS update (Thank you, Yicong) - Minor driver fixes (PERF_IDX2OFF() overflow, CMN register offsets). Selftests: - Add basic LSFE check to the existing hwcaps test - Support nolibc in GCS tests - Extend SVE ptrace test to pass unsupported regsets and invalid vector lengths - Minor cleanups (typos, cosmetic changes). System registers: - Fix ID_PFR1_EL1 definition - Fix incorrect signedness of some fields in ID_AA64MMFR4_EL1 - Sync TCR_EL1 definition with the latest Arm ARM (L.b) - Be stricter about the input fed into our AWK sysreg generator script - Typo fixes and removal of redundant definitions. ACPI, EFI and PSCI: - Decouple Arm's "Software Delegated Exception Interface" (SDEI) support from the ACPI GHES code so that it can be used by platforms booted with device-tree - Remove unnecessary per-CPU tracking of the FPSIMD state across EFI runtime calls - Fix a node refcount imbalance in the PSCI device-tree code. CPU Features: - Ensure register sanitisation is applied to fields in ID_AA64MMFR4 - Expose AIDR_EL1 to userspace via sysfs, primarily so that KVM guests can reliably query the underlying CPU types from the VMM - Re-enabling of SME support (CONFIG_ARM64_SME) as a result of fixes to our context-switching, signal handling and ptrace code" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (93 commits) arm64: cpufeature: Remove duplicate asm/mmu.h header arm64: Kconfig: Make CPU_BIG_ENDIAN depend on BROKEN perf/dwc_pcie: Fix use of uninitialized variable arm/syscalls: mark syscall invocation as likely in invoke_syscall Documentation: hisi-pmu: Add introduction to HiSilicon V3 PMU Documentation: hisi-pmu: Fix of minor format error drivers/perf: hisi: Add support for L3C PMU v3 drivers/perf: hisi: Refactor the event configuration of L3C PMU drivers/perf: hisi: Extend the field of tt_core drivers/perf: hisi: Extract the event filter check of L3C PMU drivers/perf: hisi: Simplify the probe process of each L3C PMU version drivers/perf: hisi: Export hisi_uncore_pmu_isr() drivers/perf: hisi: Relax the event ID check in the framework perf: Fujitsu: Add the Uncore PMU driver arm64: map [_text, _stext) virtual address range non-executable+read-only arm64/sysreg: Update TCR_EL1 register arm64: Enable vmalloc-huge with ptdump arm64: cpufeature: add Neoverse-V3AE to BBML2 allow list arm64: errata: Apply workarounds for Neoverse-V3AE arm64: cputype: Add Neoverse-V3AE definitions ...

arm64: Enable EFI secret area Securityfs support

2025-09-19T09:12:01Z

Enable EFI COCO secrets support. Provide the ioremap_encrypted() support required by the driver. Cc: Sami Mujawar Cc: Will Deacon Cc: Catalin Marinas Cc: Aneesh Kumar K.V Cc: Steven Price Reviewed-by: Gavin Shan Tested-by: Sami Mujawar Signed-off-by: Suzuki K Poulose Signed-off-by: Will Deacon

virt: sev-guest: Satisfy linear mapping requirement in get_derived_key()

2025-08-15T15:05:39Z

Commit 7ffeb2fc2670 ("x86/sev: Document requirement for linear mapping of guest request buffers") added a check that requires the guest request buffers to be in the linear mapping. The get_derived_key() function was passing a buffer that was allocated on the stack, resulting in the call to snp_send_guest_request() returning an error. Update the get_derived_key() function to use an allocated buffer instead of a stack buffer. Fixes: 7ffeb2fc2670 ("x86/sev: Document requirement for linear mapping of guest request buffers") Signed-off-by: Tom Lendacky Signed-off-by: Borislav Petkov (AMD) Cc: Link: https://lore.kernel.org/9b764ca9fc79199a091aac684c4926e2080ca7a8.1752698495.git.thomas.lendacky@amd.com

Merge tag 'x86_sev_for_v6.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-07-30T00:18:46Z

Pull x86 SEV updates from Borislav Petkov: - Map the SNP calling area pages too so that OVMF EFI fw can issue SVSM calls properly with the goal of implementing EFI variable store in the SVSM - a component which is trusted by the guest, vs in the firmware, which is not - Allow the kernel to handle #VC exceptions from EFI runtime services properly when running as a SNP guest - Rework and cleanup the SNP guest request issue glue code a bit * tag 'x86_sev_for_v6.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/sev: Let sev_es_efi_map_ghcbs() map the CA pages too x86/sev/vc: Fix EFI runtime instruction emulation x86/sev: Drop unnecessary parameter in snp_issue_guest_request() x86/sev: Document requirement for linear mapping of guest request buffers x86/sev: Allocate request in TSC_INFO_REQ on stack virt: sev-guest: Contain snp_guest_request_ioctl in sev-guest

Merge tag 'driver-core-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

2025-07-29T19:15:39Z

Pull driver core updates from Danilo Krummrich: "debugfs: - Remove unneeded debugfs_file_{get,put}() instances - Remove last remnants of debugfs_real_fops() - Allow storing non-const void * in struct debugfs_inode_info::aux sysfs: - Switch back to attribute_group::bin_attrs (treewide) - Switch back to bin_attribute::read()/write() (treewide) - Constify internal references to 'struct bin_attribute' Support cache-ids for device-tree systems: - Add arch hook arch_compact_of_hwid() - Use arch_compact_of_hwid() to compact MPIDR values on arm64 Rust: - Device: - Introduce CoreInternal device context (for bus internal methods) - Provide generic drvdata accessors for bus devices - Provide Driver::unbind() callbacks - Use the infrastructure above for auxiliary, PCI and platform - Implement Device::as_bound() - Rename Device::as_ref() to Device::from_raw() (treewide) - Implement fwnode and device property abstractions - Implement example usage in the Rust platform sample driver - Devres: - Remove the inner reference count (Arc) and use pin-init instead - Replace Devres::new_foreign_owned() with devres::register() - Require T to be Send in Devres - Initialize the data kept inside a Devres last - Provide an accessor for the Devres associated Device - Device ID: - Add support for ACPI device IDs and driver match tables - Split up generic device ID infrastructure - Use generic device ID infrastructure in net::phy - DMA: - Implement the dma::Device trait - Add DMA mask accessors to dma::Device - Implement dma::Device for PCI and platform devices - Use DMA masks from the DMA sample module - I/O: - Implement abstraction for resource regions (struct resource) - Implement resource-based ioremap() abstractions - Provide platform device accessors for I/O (remap) requests - Misc: - Support fallible PinInit types in Revocable - Implement Wrapper for Opaque - Merge pin-init blanket dependencies (for Devres) Misc: - Fix OF node leak in auxiliary_device_create() - Use util macros in device property iterators - Improve kobject sample code - Add device_link_test() for testing device link flags - Fix typo in Documentation/ABI/testing/sysfs-kernel-address_bits - Hint to prefer container_of_const() over container_of()" * tag 'driver-core-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (84 commits) rust: io: fix broken intra-doc links to `platform::Device` rust: io: fix broken intra-doc link to missing `flags` module rust: io: mem: enable IoRequest doc-tests rust: platform: add resource accessors rust: io: mem: add a generic iomem abstraction rust: io: add resource abstraction rust: samples: dma: set DMA mask rust: platform: implement the `dma::Device` trait rust: pci: implement the `dma::Device` trait rust: dma: add DMA addressing capabilities rust: dma: implement `dma::Device` trait rust: net::phy Change module_phy_driver macro to use module_device_table macro rust: net::phy represent DeviceId as transparent wrapper over mdio_device_id rust: device_id: split out index support into a separate trait device: rust: rename Device::as_ref() to Device::from_raw() arm64: cacheinfo: Provide helper to compress MPIDR value into u32 cacheinfo: Add arch hook to compress CPU h/w id into 32 bits for cache-id cacheinfo: Set cache 'id' based on DT data container_of: Document container_of() is not to be used in new code driver core: auxiliary bus: fix OF node leak ...

virt: sev-guest: Contain snp_guest_request_ioctl in sev-guest

2025-06-18T20:55:30Z

SNP Guest Request uses only exitinfo2 which is a return value from GHCB, has meaning beyond ioctl and therefore belongs to struct snp_guest_req. Move exitinfo2 there and remove snp_guest_request_ioctl from the SEV platform code. No functional change intended. Signed-off-by: Alexey Kardashevskiy Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Tom Lendacky Reviewed-by: Dionna Glaze Link: https://lore.kernel.org/20250611040842.2667262-2-aik@amd.com

sysfs: treewide: switch back to attribute_group::bin_attrs

2025-06-17T08:44:15Z

The normal bin_attrs field can now handle const pointers. This makes the _new variant unnecessary. Switch all users back. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20250530-sysfs-const-bin_attr-final-v3-4-724bfcf05b99@weissschuh.net Signed-off-by: Greg Kroah-Hartman

sysfs: treewide: switch back to bin_attribute::read()/write()

2025-06-17T08:44:13Z

The bin_attribute argument of bin_attribute::read() is now const. This makes the _new() callbacks unnecessary. Switch all users back. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20250530-sysfs-const-bin_attr-final-v3-3-724bfcf05b99@weissschuh.net Signed-off-by: Greg Kroah-Hartman

efi_secret: clean securityfs use up

2025-06-11T22:20:19Z

securityfs_remove() does take care of entire subtree now; no need to mess with them individually. NB: ->i_op replacement in there is still buggy. One shouldn't ever modify ->i_op of live accessible inode. Signed-off-by: Al Viro

fix locking in efi_secret_unlink()

2025-06-11T22:00:31Z

We used to need securityfs_remove() to undo simple_pin_fs() done when the file had been created and to drop the second extra reference taken at the same time. Now that neither is needed (or done by securityfs_remove()), we can simply call simple_unlink() and be done with that - the broken games with locking had been there only for the sake of securityfs_remove(). Signed-off-by: Al Viro