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iommu/ipmmu-vmsa: Add an array of slave devices whitelist 

To avoid adding copy and pasted strcmp codes in the future,
this patch adds an array "rcar_gen3_slave_whitelist" to check
whether the device can work with the IPMMU or not.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yoshihiro Shimoda 2018-11-28 09:23:36 +00:00 committed by Joerg Roedel
parent b7ee92c6ff
commit 807596491d
1 changed files with 12 additions and 1 deletions
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13
drivers/iommu/ipmmu-vmsa.c
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@ -770,8 +770,13 @@ static const struct soc_device_attribute soc_rcar_gen3_whitelist[] = {
{ /* sentinel */ }
};
static const char * const rcar_gen3_slave_whitelist[] = {
};
static bool ipmmu_slave_whitelist(struct device *dev)
{
unsigned int i;
/*
* For R-Car Gen3 use a white list to opt-in slave devices.
* For Other SoCs, this returns true anyway.
@ -783,7 +788,13 @@ static bool ipmmu_slave_whitelist(struct device *dev)
if (!soc_device_match(soc_rcar_gen3_whitelist))
return false;
/* By default, do not allow use of IPMMU */
/* Check whether this slave device can work with the IPMMU */
for (i = 0; i < ARRAY_SIZE(rcar_gen3_slave_whitelist); i++) {
if (!strcmp(dev_name(dev), rcar_gen3_slave_whitelist[i]))
return true;
}
/* Otherwise, do not allow use of IPMMU */
return false;
}