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authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2018-11-28 09:23:36 +0000
committerJoerg Roedel <jroedel@suse.de>2018-12-03 14:24:02 +0100
commit807596491d33d016e420d217cf1350aef2d2b3f7 (patch)
tree6dab39610cf9d15ae7870f9039e35f5fc16672dd /drivers/iommu/ipmmu-vmsa.c
parentb7ee92c6ff0e023a473b2500d771f6bf504fcc1a (diff)
downloadlinux-807596491d33d016e420d217cf1350aef2d2b3f7.tar.bz2
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>
Diffstat (limited to 'drivers/iommu/ipmmu-vmsa.c')
-rw-r--r--drivers/iommu/ipmmu-vmsa.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 46906a763d69..331e86839a8c 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -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;
}