kernel.git/arch/x86/kernel/cpu/mtrr/generic.c, branch master

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51Z

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28Z

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

x86/mtrr: Drop unnecessary export of "mtrr_state"

2025-11-12T23:24:42Z

Don't export "mtrr_state" as usage is limited to arch/x86/kernel/cpu/mtrr (and nothing outside of that directory even includes the local mtrr.h). No functional change intended. Signed-off-by: Sean Christopherson Signed-off-by: Dave Hansen Link: https://patch.msgid.link/20251112173944.1380633-3-seanjc%40google.com

x86/mtrr: Check if fixed-range MTRRs exist in mtrr_save_fixed_ranges()

2025-05-12T11:04:40Z

When suspending, save_processor_state() calls mtrr_save_fixed_ranges() to save fixed-range MTRRs. On platforms without fixed-range MTRRs like the ACRN hypervisor which has removed fixed-range MTRR emulation, accessing these MSRs will trigger an unchecked MSR access error. Make sure fixed-range MTRRs are supported before access to prevent such error. Since mtrr_state.have_fixed is only set when MTRRs are present and enabled, checking the CPU feature flag in mtrr_save_fixed_ranges() is unnecessary. Fixes: 3ebad5905609 ("[PATCH] x86: Save and restore the fixed-range MTRRs of the BSP when suspending") Signed-off-by: Jiaqing Zhao Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/20250509170633.3411169-2-jiaqing.zhao@linux.intel.com

x86/mtrr: Modify a x86_model check to an Intel VFM check

2025-03-19T10:19:40Z

Simplify one of the last few Intel x86_model checks in arch/x86 by substituting it with a VFM one. Signed-off-by: Sohil Mehta Signed-off-by: Ingo Molnar Acked-by: Dave Hansen Link: https://lore.kernel.org/r/20250219184133.816753-5-sohil.mehta@intel.com

x86/mtrr: Use str_enabled_disabled() helper in print_mtrr_state()

2025-03-19T10:17:56Z

Remove hard-coded strings by using the str_enabled_disabled() helper function. Suggested-by: Christophe JAILLET Signed-off-by: Thorsten Blum Signed-off-by: Dave Hansen Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/all/20250117144900.171684-2-thorsten.blum%40linux.dev

x86/mtrr: Rename mtrr_overwrite_state() to guest_force_mtrr_state()

2024-12-04T18:46:19Z

Rename the helper to better reflect its function. Suggested-by: Dave Hansen Signed-off-by: Kirill A. Shutemov Signed-off-by: Dave Hansen Acked-by: Dave Hansen Link: https://lore.kernel.org/all/20241202073139.448208-1-kirill.shutemov%40linux.intel.com

x86/CPU/AMD: Track SNP host status with cc_platform_*()

2024-04-04T08:40:30Z

The host SNP worthiness can determined later, after alternatives have been patched, in snp_rmptable_init() depending on cmdline options like iommu=pt which is incompatible with SNP, for example. Which means that one cannot use X86_FEATURE_SEV_SNP and will need to have a special flag for that control. Use that newly added CC_ATTR_HOST_SEV_SNP in the appropriate places. Move kdump_sev_callback() to its rightful place, while at it. Fixes: 216d106c7ff7 ("x86/sev: Add SEV-SNP host initialization support") Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Tom Lendacky Tested-by: Srikanth Aithal Link: https://lore.kernel.org/r/20240327154317.29909-6-bp@alien8.de

x86/mtrr: Don't print errors if MtrrFixDramModEn is set when SNP enabled

2024-01-29T16:24:27Z

SNP enabled platforms require the MtrrFixDramModeEn bit to be set across all CPUs when SNP is enabled. Therefore, don't print error messages when MtrrFixDramModeEn is set when bringing CPUs online. Closes: https://lore.kernel.org/kvm/68b2d6bf-bce7-47f9-bebb-2652cc923ff9@linux.microsoft.com/ Reported-by: Jeremi Piotrowski Signed-off-by: Ashish Kalra Signed-off-by: Michael Roth Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20240126041126.1927228-6-michael.roth@amd.com

x86/mtrr: Document missing function parameters in kernel-doc

2023-11-20T09:19:27Z

Add text explaining what they do. No functional changes. Closes: https://lore.kernel.org/oe-kbuild-all/202311130104.9xKAKzke-lkp@intel.com/ Reported-by: kernel test robot Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/202311130104.9xKAKzke-lkp@intel.com