Messages in this thread | | | From | Ashok Raj <> | Subject | [PATCH 00/13] Make microcode loading more robust | Date | Fri, 14 Oct 2022 13:09:00 -0700 |
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This series adds more robustness to microcode loading.
- Adds proper quiesce to sibling threads in an NMI handler. - Fixes some nasty early loading bugs that are there for a long time. - Adds a minimum revision ID to Intel patch meta-data, requested by Thomas. - Turns microcode late loading back on by default. - Adds some debugfs support to provide ability to test the microcode flows without the need for a new microcode.
This series has too many changes from previous post, but for anecdotal references.
https://lore.kernel.org/lkml/20220817051127.3323755-1-ashok.raj@intel.com/
Here is a summary of those patches.
patch1: Allow printing the old and new rev during an early update patch2: Fix a potential bug during CPU hot-add flow for microcode update. patch3: Fixes a nasty early loading bug that locks up with endless retries. patch4: Add a helper to perform self NMI patch5: Drop siblings in NMI while primary thread updates the microcode. patch6: Rename refresh_fw to late_loading, in preparation for min-rev patches. patch7: Move late loading warning to the same function as where taint happens. patch8: Adds support for microcode meta-data to declare a minimum version patch9: Add a generic way to declare support for min-rev across vendors. patch10: Drop wbinvd(), its not required after patch7. patch11: Print microcode updated messages only when its successfully loaded patch12: Issue a warning if MCE arrives while a microcode update is in progress. patch13: Debug patch: To permit testing repeated loading of microcode.
Ashok Raj (12): x86/microcode/intel: Print old and new rev after early microcode update x86/microcode: Do not load from filesystem for CPU hot add x86/microcode/intel: Fix a hang if early loading microcode fails x86/microcode: Place siblings in NMI loop while update in progress x86/microcode: Rename refresh_fw to late_loading x86/microcode: Move late-load warning to earlier where kernel taint happens x86/microcode/intel: Add minimum required revision to microcode header x86/microcode: Add a generic mechanism to declare support for minrev x86/microcode/intel: Drop wbinvd() from microcode loading x86/microcode: Display revisions only when update is successful x86/mce: Warn of a microcode update is in progress when MCE arrives x86/microcode/intel: Add ability to update microcode even if rev is unchanged
Jacob Pan (1): x86/x2apic: Support x2apic self IPI with NMI_VECTOR
arch/x86/include/asm/microcode.h | 39 ++++++- arch/x86/include/asm/microcode_intel.h | 4 +- arch/x86/kernel/apic/x2apic_phys.c | 6 +- arch/x86/kernel/cpu/mce/core.c | 5 + arch/x86/kernel/cpu/microcode/amd.c | 6 +- arch/x86/kernel/cpu/microcode/core.c | 156 ++++++++++++++++++++++--- arch/x86/kernel/cpu/microcode/intel.c | 85 +++++++++----- arch/x86/kernel/cpu/microcode/nmi.c | 72 ++++++++++++ arch/x86/kernel/nmi.c | 7 ++ arch/x86/Kconfig | 7 +- arch/x86/kernel/cpu/microcode/Makefile | 1 + 11 files changed, 332 insertions(+), 56 deletions(-) create mode 100644 arch/x86/kernel/cpu/microcode/nmi.c
-- 2.34.1
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