lwn.git - Linux kernel documentation tree maintained by Jonathan Corbet

Age	Commit message (Collapse)	Author
2026-02-21	Convert 'alloc_obj' family to use the new default GFP_KERNEL argument	Linus Torvalds
	This was done entirely with mindless brute force, using git grep -l '\<k[vmz]alloc_objs(., GFP_KERNEL)' \| xargs sed -i 's/\(alloc_objs(.*\), GFP_KERNEL)/\1)/' to convert the new alloc_obj() users that had a simple GFP_KERNEL argument to just drop that argument. Note that due to the extreme simplicity of the scripting, any slightly more complex cases spread over multiple lines would not be triggered: they definitely exist, but this covers the vast bulk of the cases, and the resulting diff is also then easier to check automatically. For the same reason the 'flex' versions will be done as a separate conversion. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21	treewide: Replace kmalloc with kmalloc_obj for non-scalar types	Kees Cook
	This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(PTR, FAM, COUNT, ...) (where TYPE may also be VAR) The resulting allocations no longer return "void ", instead returning "TYPE ". Signed-off-by: Kees Cook <kees@kernel.org>
2025-12-02	crypto/ccp: Implement SEV-TIO PCIe IDE (phase1)	Alexey Kardashevskiy
	Implement the SEV-TIO (Trusted I/O) firmware interface for PCIe TDISP (Trust Domain In-Socket Protocol). This enables secure communication between trusted domains and PCIe devices through the PSP (Platform Security Processor). The implementation includes: - Device Security Manager (DSM) operations for establishing secure links - SPDM (Security Protocol and Data Model) over DOE (Data Object Exchange) - IDE (Integrity Data Encryption) stream management for secure PCIe This module bridges the SEV firmware stack with the generic PCIe TSM framework. This is phase1 as described in Documentation/driver-api/pci/tsm.rst. On AMD SEV, the AMD PSP firmware acts as TSM (manages the security/trust). The CCP driver provides the interface to it and registers in the TSM subsystem. Detect the PSP support (reported via FEATURE_INFO + SNP_PLATFORM_STATUS) and enable SEV-TIO in the SNP_INIT_EX call if the hardware supports TIO. Implement SEV TIO PSP command wrappers in sev-dev-tio.c and store the data in the SEV-TIO-specific structs. Implement TSM hooks and IDE setup in sev-dev-tsm.c. Signed-off-by: Alexey Kardashevskiy <aik@amd.com> Link: https://patch.msgid.link/692f506bb80c9_261c11004@dwillia2-mobl4.notmuch Acked-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>