函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\cpu\mce\intel.c Create Date:2022-07-27 09:02:54
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Enable CMCI (Corrected Machine Check Interrupt) for available MCE banks* on this CPU. Use the algorithm recommended in the SDM to discover shared* banks.

函数原型：static void cmci_discover(int banks)

返回类型：void

参数：

类型参数名称
intbanks
268  owned等于this_cpu_ptr( & CMCI can be delivered to multiple cpus that share a machine check bank* so we need to designate a single cpu to process errors logged in each bank* in the interrupt handler (otherwise we would have many races and potential)
271  bios_wrong_thresh等于0
273  raw_spin_lock_irqsave( & cmci_discover_lock protects against parallel discovery attempts* which could race against each other., flags)
274  以i小于banks循环
276  bios_zero_thresh等于0
278  如果st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from则继续下一循环
282  如果st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from则继续下一循环
285  rdmsrl(MSR_IA32_MCx_CTL2(i), val)
288  如果val按位与CTL2 register defines 则
289  lear_bit - Clears a bit in memory*@nr: Bit to clear*@addr: Address to start counting from* This is a relaxed atomic operation (no implied memory barriers).
290  __clear_bit - Clears a bit in memory*@nr: the bit to clear*@addr: the address to start counting from* Unlike clear_bit(), this function is non-atomic. If it is called on the same* region of memory concurrently, the effect may be that only one operation
291  继续下一循环
294  如果非bios_cmci_threshold则
295  val与等于MCI_CTL2_CMCI_THRESHOLD_MASK的反
296  val或等于CMCI_THRESHOLD
297  否则如果非val按位与MCI_CTL2_CMCI_THRESHOLD_MASK的值则
303  bios_zero_thresh等于1
304  val或等于CMCI_THRESHOLD
307  val或等于CTL2 register defines
308  wrmsrl(MSR_IA32_MCx_CTL2(i), val)
309  rdmsrl(MSR_IA32_MCx_CTL2(i), val)
312  如果val按位与CTL2 register defines 则
313  设置内存位
314  __clear_bit - Clears a bit in memory*@nr: the bit to clear*@addr: the address to start counting from* Unlike clear_bit(), this function is non-atomic. If it is called on the same* region of memory concurrently, the effect may be that only one operation
321  如果bios_cmci_threshold且bios_zero_thresh且val按位与MCI_CTL2_CMCI_THRESHOLD_MASK则bios_wrong_thresh等于1
324  否则
325  WARN_ON(!st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from)
328  raw_spin_unlock_irqrestore( & cmci_discover_lock protects against parallel discovery attempts* which could race against each other., flags)
329  如果bios_cmci_threshold且bios_wrong_thresh则
330  pr_info_once("bios_cmci_threshold: Some banks do not have valid thresholds set\n")
332  pr_info_once("bios_cmci_threshold: Make sure your BIOS supports this boot option\n")
调用者
名称描述
cmci_rediscover_work_func
cmci_reenableReenable CMCI on this CPU in case a CPU down failed.
intel_init_cmci