From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 2 Sep 2026 15:31:14 -0700 Subject: treewide: refresh kmalloc_obj() conversions This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook --- Documentation/virt/acrn/cpuid.rst | 46 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/virt/acrn/cpuid.rst (limited to 'Documentation/virt/acrn/cpuid.rst') diff --git a/Documentation/virt/acrn/cpuid.rst b/Documentation/virt/acrn/cpuid.rst new file mode 100644 index 000000000..65fa4b9c1 --- /dev/null +++ b/Documentation/virt/acrn/cpuid.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=============== +ACRN CPUID bits +=============== + +A guest VM running on an ACRN hypervisor can check some of its features using +CPUID. + +ACRN cpuid functions are: + +function: 0x40000000 + +returns:: + + eax = 0x40000010 + ebx = 0x4e524341 + ecx = 0x4e524341 + edx = 0x4e524341 + +Note that this value in ebx, ecx and edx corresponds to the string +"ACRNACRNACRN". The value in eax corresponds to the maximum cpuid function +present in this leaf, and will be updated if more functions are added in the +future. + +function: define ACRN_CPUID_FEATURES (0x40000001) + +returns:: + + ebx, ecx, edx + eax = an OR'ed group of (1 << flag) + +where ``flag`` is defined as below: + +================================= =========== ================================ +flag value meaning +================================= =========== ================================ +ACRN_FEATURE_PRIVILEGED_VM 0 guest VM is a privileged VM +================================= =========== ================================ + +function: 0x40000010 + +returns:: + + ebx, ecx, edx + eax = (Virtual) TSC frequency in kHz. -- cgit v1.3.1