Commit 56f17be6 authored by Yazen Ghannam's avatar Yazen Ghannam Committed by Borislav Petkov (AMD)
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x86/mce/amd: Define threshold restart function for banks 



Prepare for CMCI storm support by moving the common bank/block iterator code
to a helper function.

Include a parameter to switch the interrupt enable. This will be used by the
CMCI storm handling function.

Signed-off-by: default avatarYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarNikolay Borisov <nik.borisov@suse.com>
Link: https://lore.kernel.org/20251104-wip-mca-updates-v8-0-66c8eacf67b9@amd.com
parent 3206b416

arch/x86/kernel/cpu/mce/amd.c

+19 −18
Original line number Diff line number Diff line
@@ -471,6 +471,24 @@ static void threshold_restart_block(void *_tr) 
	wrmsr(tr->b->address, lo, hi);

}



static void threshold_restart_bank(unsigned int bank, bool intr_en)

{

	struct threshold_bank **thr_banks = this_cpu_read(threshold_banks);

	struct threshold_block *block, *tmp;

	struct thresh_restart tr;



	if (!thr_banks || !thr_banks[bank])

		return;



	memset(&tr, 0, sizeof(tr));



	list_for_each_entry_safe(block, tmp, &thr_banks[bank]->miscj, miscj) {

		tr.b = block;

		tr.b->interrupt_enable = intr_en;

		threshold_restart_block(&tr);

	}

}



static void mce_threshold_block_init(struct threshold_block *b, int offset)

{

	struct thresh_restart tr = {
@@ -814,24 +832,7 @@ static void amd_deferred_error_interrupt(void) 


static void amd_reset_thr_limit(unsigned int bank)

{

	struct threshold_bank **bp = this_cpu_read(threshold_banks);

	struct threshold_block *block, *tmp;

	struct thresh_restart tr;



	/*

	 * Validate that the threshold bank has been initialized already. The

	 * handler is installed at boot time, but on a hotplug event the

	 * interrupt might fire before the data has been initialized.

	 */

	if (!bp || !bp[bank])

		return;



	memset(&tr, 0, sizeof(tr));



	list_for_each_entry_safe(block, tmp, &bp[bank]->miscj, miscj) {

		tr.b = block;

		threshold_restart_block(&tr);

	}

	threshold_restart_bank(bank, true);

}



/*