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ppc/pnv: add PHB4 helpers for user created pnv-phb

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The PHB4 backend relies on a link with the corresponding PEC element.
This is trivial to do during machine_init() time for default devices,
but not so much for user created ones.

pnv_phb4_get_pec() is a small variation of the function that was
reverted by commit 9c10d86fee "ppc/pnv: Remove user-created PHB{3,4,5}
devices". We'll use it to determine the appropriate PEC for a given user
created pnv-phb that uses a PHB4 backend.

This is done during realize() time, in pnv_phb_user_device_init().

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-8-danielhb413@gmail.com>
This commit is contained in:
Daniel Henrique Barboza 2022-08-11 13:39:46 -03:00
parent 892c3ad0d5
commit c147177277
1 changed files with 32 additions and 3 deletions
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35
hw/ppc/pnv.c
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@ -281,6 +281,34 @@ static void pnv_dt_icp(PnvChip *chip, void *fdt, uint32_t pir,
g_free(reg);
}
static PnvPhb4PecState *pnv_phb4_get_pec(PnvChip *chip, PnvPHB4 *phb,
Error **errp)
{
Pnv9Chip *chip9 = PNV9_CHIP(chip);
int chip_id = phb->chip_id;
int index = phb->phb_id;
int i, j;
for (i = 0; i < chip->num_pecs; i++) {
/*
* For each PEC, check the amount of phbs it supports
* and see if the given phb4 index matches an index.
*/
PnvPhb4PecState *pec = &chip9->pecs[i];
for (j = 0; j < pec->num_phbs; j++) {
if (index == pnv_phb4_pec_get_phb_id(pec, j)) {
return pec;
}
}
}
error_setg(errp,
"pnv-phb4 chip-id %d index %d didn't match any existing PEC",
chip_id, index);
return NULL;
}
/*
* Adds a PnvPHB to the chip. Returns the parent obj of the
* PHB which varies with each version (phb version 3 is parented
@ -302,10 +330,11 @@ Object *pnv_chip_add_phb(PnvChip *chip, PnvPHB *phb, Error **errp)
chip8->num_phbs++;
return OBJECT(chip);
} else {
/* phb4 support will be added later */
return NULL;
}
phb->pec = pnv_phb4_get_pec(chip, PNV_PHB4(phb->backend), errp);
return OBJECT(phb->pec);
}
static void pnv_chip_power8_dt_populate(PnvChip *chip, void *fdt)