kernel/drivers/firmware/efi/cper.c, branch linux-6.9.y

Merge tag 'pci-v6.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

2024-03-14T17:58:27Z

Pull PCI updates from Bjorn Helgaas: "Enumeration: - Consolidate interrupt related code in irq.c (Ilpo Järvinen) - Reduce kernel size by replacing sysfs resource macros with functions (Ilpo Järvinen) - Reduce kernel size by compiling sysfs support only when CONFIG_SYSFS=y (Lukas Wunner) - Avoid using Extended Tags on 3ware-9650SE Root Port to work around an apparent hardware defect (Jörg Wedekind) Resource management: - Fix an MMIO mapping leak in pci_iounmap() (Philipp Stanner) - Move pci_iomap.c and other PCI-specific devres code to drivers/pci (Philipp Stanner) - Consolidate PCI devres code in devres.c (Philipp Stanner) Power management: - Avoid D3cold on Asus B1400 PCI-NVMe bridge, where firmware doesn't know how to return correctly to D0, and remove previous quirk that wasn't as specific (Daniel Drake) - Allow runtime PM when the driver enables it but doesn't need any runtime PM callbacks (Raag Jadav) - Drain runtime-idle callbacks before driver removal to avoid races between .remove() and .runtime_idle(), which caused intermittent page faults when the rtsx .runtime_idle() accessed registers that its .remove() had already unmapped (Rafael J. Wysocki) Virtualization: - Avoid Secondary Bus Reset on LSI FW643 so it can be assigned to VMs with VFIO, e.g., for professional audio software on many Apple machines, at the cost of leaking state between VMs (Edmund Raile) Error handling: - Print all logged TLP Prefixes, not just the first, after AER or DPC errors (Ilpo Järvinen) - Quirk the DPC PIO log size for Intel Raptor Lake Root Ports, which still don't advertise a legal size (Paul Menzel) - Ignore expected DPC Surprise Down errors on hot removal (Smita Koralahalli) - Block runtime suspend while handling AER errors to avoid races that prevent the device form being resumed from D3hot (Stanislaw Gruszka) Peer-to-peer DMA: - Use atomic XA allocation in RCU read section (Christophe JAILLET) ASPM: - Collect bits of ASPM-related code that we need even without CONFIG_PCIEASPM into aspm.c (David E. Box) - Save/restore L1 PM Substates config for suspend/resume (David E. Box) - Update save_save when ASPM config is changed, so a .slot_reset() during error recovery restores the changed config, not the .probe()-time config (Vidya Sagar) Endpoint framework: - Refactor and improve pci_epf_alloc_space() API (Niklas Cassel) - Clean up endpoint BAR descriptions (Niklas Cassel) - Fix ntb_register_device() name leak in error path (Yang Yingliang) - Return actual error code for pci_vntb_probe() failure (Yang Yingliang) Broadcom STB PCIe controller driver: - Fix MDIO write polling, which previously never waited for completion (Jonathan Bell) Cadence PCIe endpoint driver: - Clear the ARI "Next Function Number" of last function (Jasko-EXT Wojciech) Freescale i.MX6 PCIe controller driver: - Simplify by replacing switch statements with function pointers for different hardware variants (Frank Li) - Simplify by using clk_bulk*() API (Frank Li) - Remove redundant DT clock and reg/reg-name details (Frank Li) - Add i.MX95 DT and driver support for both Root Complex and Endpoint mode (Frank Li) Microsoft Hyper-V host bridge driver: - Reduce memory usage by limiting ring buffer size to 16KB instead of 4 pages (Michael Kelley) Qualcomm PCIe controller driver: - Add X1E80100 DT and driver support (Abel Vesa) - Add DT 'required-opps' for SoCs that require a minimum performance level (Johan Hovold) - Make DT 'msi-map-mask' optional, depending on how MSI interrupts are mapped (Johan Hovold) - Disable ASPM L0s for sc8280xp, sa8540p and sa8295p because the PHY configuration isn't tuned correctly for L0s (Johan Hovold) - Split dt-binding qcom,pcie.yaml into qcom,pcie-common.yaml and separate files for SA8775p, SC7280, SC8180X, SC8280XP, SM8150, SM8250, SM8350, SM8450, SM8550 for easier reviewing (Krzysztof Kozlowski) - Enable BDF to SID translation by disabling bypass mode (Manivannan Sadhasivam) - Add endpoint MHI support for Snapdragon SA8775P SoC (Mrinmay Sarkar) Synopsys DesignWare PCIe controller driver: - Allocate 64-bit MSI address if no 32-bit address is available (Ajay Agarwal) - Fix endpoint Resizable BAR to actually advertise the required 1MB size (Niklas Cassel) MicroSemi Switchtec management driver: - Release resources if the .probe() fails (Christophe JAILLET) Miscellaneous: - Make pcie_port_bus_type const (Ricardo B. Marliere)" * tag 'pci-v6.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (77 commits) PCI/ASPM: Update save_state when configuration changes PCI/ASPM: Disable L1 before configuring L1 Substates PCI/ASPM: Call pci_save_ltr_state() from pci_save_pcie_state() PCI/ASPM: Save L1 PM Substates Capability for suspend/resume PCI: hv: Fix ring buffer size calculation PCI: dwc: endpoint: Fix advertised resizable BAR size PCI: cadence: Clear the ARI Capability Next Function Number of the last function PCI: dwc: Strengthen the MSI address allocation logic PCI: brcmstb: Fix broken brcm_pcie_mdio_write() polling PCI: qcom: Add X1E80100 PCIe support dt-bindings: PCI: qcom: Document the X1E80100 PCIe Controller PCI: qcom: Enable BDF to SID translation properly PCI/AER: Generalize TLP Header Log reading PCI/AER: Use explicit register size for PCI_ERR_CAP PCI: qcom: Disable ASPM L0s for sc8280xp, sa8540p and sa8295p dt-bindings: PCI: qcom: Do not require 'msi-map-mask' dt-bindings: PCI: qcom: Allow 'required-opps' PCI/AER: Block runtime suspend when handling errors PCI/ASPM: Move pci_save_ltr_state() to aspm.c PCI/ASPM: Always build aspm.c ...

PCI/AER: Generalize TLP Header Log reading

2024-03-08T21:26:46Z

Both AER and DPC RP PIO provide TLP Header Log registers (PCIe r6.1 secs 7.8.4 & 7.9.14) to convey error diagnostics but the struct is named after AER as the struct aer_header_log_regs. Also, not all places that handle TLP Header Log use the struct and the struct members are named individually. Generalize the struct name and members, and use it consistently where TLP Header Log is being handled so that a pcie_read_tlp_log() helper can be easily added. Link: https://lore.kernel.org/r/20240206135717.8565-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen [bhelgaas: drop ixgbe changes for now, tidy whitespace] Signed-off-by: Bjorn Helgaas

cxl/cper: Fix errant CPER prints for CXL events

2024-02-03T17:31:17Z

Jonathan reports that CXL CPER events dump an extra generic error message. {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1 {1}[Hardware Error]: event severity: recoverable {1}[Hardware Error]: Error 0, type: recoverable {1}[Hardware Error]: section type: unknown, fbcd0a77-c260-417f-85a9-088b1621eba6 {1}[Hardware Error]: section length: 0x90 {1}[Hardware Error]: 00000000: 00000090 00000007 00000000 0d938086 ................ {1}[Hardware Error]: 00000010: 00100000 00000000 00040000 00000000 ................ ... CXL events were rerouted though the CXL subsystem for additional processing. However, when that work was done it was missed that cper_estatus_print_section() continued with a generic error message which is confusing. Teach CPER print code to ignore printing details of some section types. Assign the CXL event GUIDs to this set to prevent confusing unknown prints. Reported-by: Jonathan Cameron Suggested-by: Jonathan Cameron Signed-off-by: Ira Weiny Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Reviewed-by: Alison Schofield Signed-off-by: Ard Biesheuvel

Merge tag 'efi-next-for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi

2022-12-13T22:31:47Z

Pull EFI updates from Ard Biesheuvel: "Another fairly sizable pull request, by EFI subsystem standards. Most of the work was done by me, some of it in collaboration with the distro and bootloader folks (GRUB, systemd-boot), where the main focus has been on removing pointless per-arch differences in the way EFI boots a Linux kernel. - Refactor the zboot code so that it incorporates all the EFI stub logic, rather than calling the decompressed kernel as a EFI app. - Add support for initrd= command line option to x86 mixed mode. - Allow initrd= to be used with arbitrary EFI accessible file systems instead of just the one the kernel itself was loaded from. - Move some x86-only handling and manipulation of the EFI memory map into arch/x86, as it is not used anywhere else. - More flexible handling of any random seeds provided by the boot environment (i.e., systemd-boot) so that it becomes available much earlier during the boot. - Allow improved arch-agnostic EFI support in loaders, by setting a uniform baseline of supported features, and adding a generic magic number to the DOS/PE header. This should allow loaders such as GRUB or systemd-boot to reduce the amount of arch-specific handling substantially. - (arm64) Run EFI runtime services from a dedicated stack, and use it to recover from synchronous exceptions that might occur in the firmware code. - (arm64) Ensure that we don't allocate memory outside of the 48-bit addressable physical range. - Make EFI pstore record size configurable - Add support for decoding CXL specific CPER records" * tag 'efi-next-for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi: (43 commits) arm64: efi: Recover from synchronous exceptions occurring in firmware arm64: efi: Execute runtime services from a dedicated stack arm64: efi: Limit allocations to 48-bit addressable physical region efi: Put Linux specific magic number in the DOS header efi: libstub: Always enable initrd command line loader and bump version efi: stub: use random seed from EFI variable efi: vars: prohibit reading random seed variables efi: random: combine bootloader provided RNG seed with RNG protocol output efi/cper, cxl: Decode CXL Error Log efi/cper, cxl: Decode CXL Protocol Error Section efi: libstub: fix efi_load_initrd_dev_path() kernel-doc comment efi: x86: Move EFI runtime map sysfs code to arch/x86 efi: runtime-maps: Clarify purpose and enable by default for kexec efi: pstore: Add module parameter for setting the record size efi: xen: Set EFI_PARAVIRT for Xen dom0 boot on all architectures efi: memmap: Move manipulation routines into x86 arch tree efi: memmap: Move EFI fake memmap support into x86 arch tree efi: libstub: Undeprecate the command line initrd loader efi: libstub: Add mixed mode support to command line initrd loader efi: libstub: Permit mixed mode return types other than efi_status_t ...

efi/cper, cxl: Decode CXL Protocol Error Section

2022-11-18T08:14:10Z

Add support for decoding CXL Protocol Error Section as defined in UEFI 2.10 Section N.2.13. Do the section decoding in a new cper_cxl.c file. This new file will be used in the future for more CXL CPERs decode support. Add this to the existing UEFI_CPER config. Signed-off-by: Smita Koralahalli Reviewed-by: Jonathan Cameron Signed-off-by: Ard Biesheuvel

efi/cper: Export several helpers for ghes_edac to use

2022-10-20T11:20:36Z

Before ghes_edac can be turned back into a proper module again, export several helpers which are going to be used by it. Signed-off-by: Jia He Signed-off-by: Borislav Petkov Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20221010023559.69655-2-justin.he@arm.com

efi/cper: Reformat CPER memory error location to more readable

2022-04-08T09:36:16Z

Remove the space after the colon in cper_mem_err_location() so that it is easier to parse its output this way, both by humans and tools. No functional changes. Signed-off-by: Shuai Xue Signed-off-by: Borislav Petkov Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20220308144053.49090-4-xueshuai@linux.alibaba.com

EDAC/ghes: Unify CPER memory error location reporting

2022-04-08T09:31:18Z

Switch the GHES EDAC memory error reporting functions to use the common CPER ones and get rid of code duplication. [ bp: - rewrite commit message, remove useless text - rip out useless reformatting - align function params on the opening brace - rename function to a more descriptive name - drop useless function exports - handle buffer lengths properly when printing other detail - remove useless casting ] Signed-off-by: Shuai Xue Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/20220308144053.49090-3-xueshuai@linux.alibaba.com

efi/cper: Add a cper_mem_err_status_str() to decode error description

2022-04-08T09:16:08Z

Introduce a new helper function cper_mem_err_status_str() to decode the error status value into a human readable string. [ bp: Massage. ] Signed-off-by: Shuai Xue Signed-off-by: Borislav Petkov Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20220308144053.49090-2-xueshuai@linux.alibaba.com

efi/cper: use stack buffer for error record decoding

2021-10-05T11:05:59Z

Joe reports that using a statically allocated buffer for converting CPER error records into human readable text is probably a bad idea. Even though we are not aware of any actual issues, a stack buffer is clearly a better choice here anyway, so let's move the buffer into the stack frames of the two functions that refer to it. Cc: Reported-by: Joe Perches Signed-off-by: Ard Biesheuvel