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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-30 13:23:17 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-30 13:23:17 -0700 |
commit | 8f645b420822f2061a41d022e8bd9a02fae5ba28 (patch) | |
tree | bf60f945b05476f724a5b0cd372263c9ab45502f | |
parent | 05b5fdb2a8f7f981b9b1aa77a6c4b810e19f01ab (diff) | |
parent | 3bff147b187d5dfccfca1ee231b0761a89f1eff5 (diff) | |
download | linux-8f645b420822f2061a41d022e8bd9a02fae5ba28.tar.bz2 |
Merge tag 'ras_core_for_v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS update from Borislav Petkov:
"A single RAS change for 5.15:
- Do not start processing MCEs logged early because the decoding
chain is not up yet - delay that processing until everything is
ready"
* tag 'ras_core_for_v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mce: Defer processing of early errors
-rw-r--r-- | arch/x86/include/asm/mce.h | 1 | ||||
-rw-r--r-- | arch/x86/kernel/cpu/mce/core.c | 11 |
2 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index 0607ec4f5091..da9321548f6f 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -265,6 +265,7 @@ enum mcp_flags { MCP_TIMESTAMP = BIT(0), /* log time stamp */ MCP_UC = BIT(1), /* log uncorrected errors */ MCP_DONTLOG = BIT(2), /* only clear, don't log */ + MCP_QUEUE_LOG = BIT(3), /* only queue to genpool */ }; bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b); diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 22791aadc085..8cb7816d03b4 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -817,7 +817,10 @@ log_it: if (mca_cfg.dont_log_ce && !mce_usable_address(&m)) goto clear_it; - mce_log(&m); + if (flags & MCP_QUEUE_LOG) + mce_gen_pool_add(&m); + else + mce_log(&m); clear_it: /* @@ -1639,10 +1642,12 @@ static void __mcheck_cpu_init_generic(void) m_fl = MCP_DONTLOG; /* - * Log the machine checks left over from the previous reset. + * Log the machine checks left over from the previous reset. Log them + * only, do not start processing them. That will happen in mcheck_late_init() + * when all consumers have been registered on the notifier chain. */ bitmap_fill(all_banks, MAX_NR_BANKS); - machine_check_poll(MCP_UC | m_fl, &all_banks); + machine_check_poll(MCP_UC | MCP_QUEUE_LOG | m_fl, &all_banks); cr4_set_bits(X86_CR4_MCE); |