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dart: Allow SIDs != 0 in dart_setup_pt_region()

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Required for dart-dcp on M2 and M2 Pro/Max.

Signed-off-by: Janne Grunau <j@jannau.net>
This commit is contained in:
Janne Grunau 2023-01-25 17:16:02 +01:00 committed by Hector Martin
parent 72cdec0e31
commit c3c29bbd92
1 changed files with 10 additions and 9 deletions
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19
src/dart.c
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@ -396,23 +396,24 @@ dart_dev_t *dart_init_fdt(void *dt, u32 phandle, int device, bool keep_pts)
int dart_setup_pt_region(dart_dev_t *dart, const char *path, int device, u64 vm_base)
{
/* only device 0 of dart-dcp and dart-disp0 are of interest */
if (device != 0)
return -1;
int node = adt_path_offset(adt, path);
if (node < 0) {
printf("dart: Error getting DART node %s\n", path);
return -1;
}
char pt_region_str[24];
snprintf(pt_region_str, sizeof(pt_region_str), "pt-region-%d", device);
char l2_tt_str[24];
snprintf(l2_tt_str, sizeof(l2_tt_str), "l2-tt-%d", device);
const struct adt_property *pt_region = adt_get_property(adt, node, "pt-region-0");
const struct adt_property *pt_region = adt_get_property(adt, node, pt_region_str);
if (pt_region && pt_region->size == 16) {
u64 region[2];
memcpy(region, pt_region->value, sizeof(region));
u64 tbl_count = (region[1] - region[0]) / SZ_16K;
if (tbl_count > 64) {
printf("dart: dart %s ignoring large pt-region-0, %lu L2 tables\n", path, tbl_count);
printf("dart: dart %s ignoring large %s, %lu L2 tables\n", path, pt_region_str,
tbl_count);
return -1;
}
/* first index is the l1 table, cap at 2 or else macOS hates it */
@ -440,10 +441,10 @@ int dart_setup_pt_region(dart_dev_t *dart, const char *path, int device, u64 vm_
dart->l1[ttbr][idx] = offset | DART_PTE_VALID;
}
u64 l2_tt_0[2] = {region[0], tbl_count};
int ret = adt_setprop(adt, node, "l2-tt-0", &l2_tt_0, sizeof(l2_tt_0));
u64 l2_tt[2] = {region[0], tbl_count};
int ret = adt_setprop(adt, node, l2_tt_str, &l2_tt, sizeof(l2_tt));
if (ret < 0) {
printf("dart: failed to update '%s/l2-tt-0'\n", path);
printf("dart: failed to update '%s/%s'\n", path, l2_tt_str);
}
dart->params->tlb_invalidate(dart);