blob: 43673f18e45ab5ca3b0daf5811c4664c744f469b [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* CMM migration tests (ESSA)
*
* Copyright IBM Corp. 2022
*
* Authors:
* Nico Boehr <nrb@linux.ibm.com>
*/
#include <libcflat.h>
#include <migrate.h>
#include <asm/interrupt.h>
#include <asm/page.h>
#include <asm/cmm.h>
#include <bitops.h>
#define NUM_PAGES 128
static uint8_t pagebuf[NUM_PAGES][PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
static void test_migration(void)
{
int i, state_mask, actual_state;
/*
* Maps ESSA actions to states the page is allowed to be in after the
* respective action was executed.
*/
int allowed_essa_state_masks[4] = {
BIT(ESSA_USAGE_STABLE), /* ESSA_SET_STABLE */
BIT(ESSA_USAGE_UNUSED), /* ESSA_SET_UNUSED */
BIT(ESSA_USAGE_VOLATILE), /* ESSA_SET_VOLATILE */
BIT(ESSA_USAGE_VOLATILE) | BIT(ESSA_USAGE_POT_VOLATILE) /* ESSA_SET_POT_VOLATILE */
};
assert(NUM_PAGES % 4 == 0);
for (i = 0; i < NUM_PAGES; i += 4) {
essa(ESSA_SET_STABLE, (unsigned long)pagebuf[i]);
essa(ESSA_SET_UNUSED, (unsigned long)pagebuf[i + 1]);
essa(ESSA_SET_VOLATILE, (unsigned long)pagebuf[i + 2]);
essa(ESSA_SET_POT_VOLATILE, (unsigned long)pagebuf[i + 3]);
}
migrate_once();
for (i = 0; i < NUM_PAGES; i++) {
actual_state = essa(ESSA_GET_STATE, (unsigned long)pagebuf[i]);
/* extract the usage state in bits 60 and 61 */
actual_state = (actual_state >> 2) & 0x3;
state_mask = allowed_essa_state_masks[i % ARRAY_SIZE(allowed_essa_state_masks)];
report(BIT(actual_state) & state_mask, "page %d state: expected_mask=0x%x actual_mask=0x%lx", i, state_mask, BIT(actual_state));
}
}
int main(void)
{
report_prefix_push("migration-cmm");
if (!check_essa_available())
report_skip("ESSA is not available");
else
test_migration();
migrate_once();
report_prefix_pop();
return report_summary();
}