kernel.git/drivers/edac/amd64_edac.c, branch linux-6.18.y

EDAC/amd64: Add support for AMD family 1Ah-based newer models

2025-09-17T09:53:54Z

Add support for family 1Ah-based models 50h-57h, 90h-9Fh, A0h-AFh, and C0h-C7h. Also, raise the maximum memory controllers number as those machines support that many. Signed-off-by: Avadhut Naik Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/20250916203242.1281036-1-avadhut.naik@amd.com

EDAC/amd64: Fix size calculation for Non-Power-of-Two DIMMs

2025-06-25T14:40:03Z

Each Chip-Select (CS) of a Unified Memory Controller (UMC) on AMD Zen-based SOCs has an Address Mask and a Secondary Address Mask register associated with it. The amd64_edac module logs DIMM sizes on a per-UMC per-CS granularity during init using these two registers. Currently, the module primarily considers only the Address Mask register for computing DIMM sizes. The Secondary Address Mask register is only considered for odd CS. Additionally, if it has been considered, the Address Mask register is ignored altogether for that CS. For power-of-two DIMMs i.e. DIMMs whose total capacity is a power of two (32GB, 64GB, etc), this is not an issue since only the Address Mask register is used. For non-power-of-two DIMMs i.e., DIMMs whose total capacity is not a power of two (48GB, 96GB, etc), however, the Secondary Address Mask register is used in conjunction with the Address Mask register. However, since the module only considers either of the two registers for a CS, the size computed by the module is incorrect. The Secondary Address Mask register is not considered for even CS, and the Address Mask register is not considered for odd CS. Introduce a new helper function so that both Address Mask and Secondary Address Mask registers are considered, when valid, for computing DIMM sizes. Furthermore, also rename some variables for greater clarity. Fixes: 81f5090db843 ("EDAC/amd64: Support asymmetric dual-rank DIMMs") Closes: https://lore.kernel.org/dbec22b6-00f2-498b-b70d-ab6f8a5ec87e@natrix.lt Reported-by: Žilvinas Žaltiena Signed-off-by: Avadhut Naik Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Yazen Ghannam Tested-by: Žilvinas Žaltiena Cc: stable@vger.kernel.org Link: https://lore.kernel.org/20250529205013.403450-1-avadhut.naik@amd.com

EDAC/amd64: Correct number of UMCs for family 19h models 70h-7fh

2025-06-16T21:11:14Z

AMD's Family 19h-based Models 70h-7fh support 4 unified memory controllers (UMC) per processor die. The amd64_edac driver, however, assumes only 2 UMCs are supported since max_mcs variable for the models has not been explicitly set to 4. The same results in incomplete or incorrect memory information being logged to dmesg by the module during initialization in some instances. Fixes: 6c79e42169fe ("EDAC/amd64: Add support for ECC on family 19h model 60h-7Fh") Closes: https://lore.kernel.org/all/27dc093f-ce27-4c71-9e81-786150a040b6@reox.at/ Reported-by: reox Signed-off-by: Avadhut Naik Signed-off-by: Borislav Petkov (AMD) Cc: stable@kernel.org Link: https://lore.kernel.org/20250613005233.2330627-1-avadhut.naik@amd.com

Merge branch 'x86/msr' into x86/core, to resolve conflicts

2025-05-13T08:42:06Z

Conflicts: arch/x86/boot/startup/sme.c arch/x86/coco/sev/core.c arch/x86/kernel/fpu/core.c arch/x86/kernel/fpu/xstate.c Semantic conflict: arch/x86/include/asm/sev-internal.h Signed-off-by: Ingo Molnar

x86/platform/amd: Move the header to

2025-04-14T07:34:17Z

Collect AMD specific platform header files in . Signed-off-by: Ingo Molnar Acked-by: Borislav Petkov (AMD) Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Mario Limonciello Link: https://lore.kernel.org/r/20250413084144.3746608-7-mingo@kernel.org

x86/platform/amd: Move the header to

2025-04-14T07:34:14Z

x86/msr: Rename 'rdmsrl()' to 'rdmsrq()'

2025-04-10T09:58:27Z

Suggested-by: "H. Peter Anvin" Signed-off-by: Ingo Molnar Acked-by: Peter Zijlstra (Intel) Cc: Juergen Gross Cc: Dave Hansen Cc: Xin Li Cc: Linus Torvalds

EDAC/amd64: Simplify return statement in dct_ecc_enabled()

2025-02-28T12:21:43Z

Simplify the return statement to improve the code's readability. No functional changes. Signed-off-by: Thorsten Blum Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Qiuxu Zhuo Reviewed-by: Yazen Ghannam Link: https://lore.kernel.org/r/20250201130953.1377-2-thorsten.blum@linux.dev

EDAC: Use string choice helper functions

2025-02-25T21:19:55Z

Remove hard-coded strings by using the str_enabled_disabled(), str_yes_no(), str_write_read(), and str_plural() helper functions. Add a space in "All DIMMs support ECC: yes/no" to improve readability. Signed-off-by: Thorsten Blum Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Yazen Ghannam Reviewed-by: Qiuxu Zhuo Link: https://lore.kernel.org/r/20250223212429.3466-2-thorsten.blum@linux.dev

Merge tag 'x86_misc_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-01-21T17:38:52Z

Pull misc x86 updates from Borislav Petkov: - The first part of a restructuring of AMD's representation of a northbridge which is legacy now, and the creation of the new AMD node concept which represents the Zen architecture of having a collection of I/O devices within an SoC. Those nodes comprise the so-called data fabric on Zen. This has at least one practical advantage of not having to add a PCI ID each time a new data fabric PCI device releases. Eventually, the lot more uniform provider of data fabric functionality amd_node.c will be used by all the drivers which need it - Smaller cleanups * tag 'x86_misc_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/amd_node: Use defines for SMN register offsets x86/amd_node: Remove dependency on AMD_NB x86/amd_node: Update __amd_smn_rw() error paths x86/amd_nb: Move SMN access code to a new amd_node driver x86/amd_nb, hwmon: (k10temp): Simplify amd_pci_dev_to_node_id() x86/amd_nb: Simplify function 3 search x86/amd_nb: Use topology info to get AMD node count x86/amd_nb: Simplify root device search x86/amd_nb: Simplify function 4 search x86: Start moving AMD node functionality out of AMD_NB x86/amd_nb: Clean up early_is_amd_nb() x86/amd_nb: Restrict init function to AMD-based systems x86/mtrr: Rename mtrr_overwrite_state() to guest_force_mtrr_state()