From c1471772772499b36659a0785d9a3de759d5aee2 Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Thu, 11 Aug 2022 13:39:46 -0300 Subject: [PATCH] ppc/pnv: add PHB4 helpers for user created pnv-phb MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Cédric Le Goater Reviewed-by: Frederic Barrat Message-Id: <20220811163950.578927-8-danielhb413@gmail.com> --- hw/ppc/pnv.c | 35 ++++++++++++++++++++++++++++++++--- 1 file changed, 32 insertions(+), 3 deletions(-) diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c index 9ce1ae7752..c34967cac7 100644 --- a/hw/ppc/pnv.c +++ b/hw/ppc/pnv.c @@ -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) -- 2.11.4.GIT