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Date: Fri, 28 Sep 2012 10:08:34 -0400 From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> To: Joerg Roedel <joerg.roedel@....com> Cc: iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 01/16] iommu/amd: Keep track of HPET and IOAPIC device ids On Fri, Sep 28, 2012 at 02:23:51PM +0200, Joerg Roedel wrote: > The IVRS ACPI table provides information about the IOAPICs > and the HPETs available in the system and which PCI device > ID they use in transactions. Save that information for later > usage in interrupt remapping. > > Signed-off-by: Joerg Roedel <joerg.roedel@....com> > --- > drivers/iommu/amd_iommu.c | 3 ++ > drivers/iommu/amd_iommu_init.c | 65 +++++++++++++++++++++++++++++++++++++-- > drivers/iommu/amd_iommu_types.h | 34 ++++++++++++++++++++ > 3 files changed, 100 insertions(+), 2 deletions(-) > > diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c > index b64502d..6f51483 100644 > --- a/drivers/iommu/amd_iommu.c > +++ b/drivers/iommu/amd_iommu.c > @@ -72,6 +72,9 @@ static DEFINE_SPINLOCK(iommu_pd_list_lock); > static LIST_HEAD(dev_data_list); > static DEFINE_SPINLOCK(dev_data_list_lock); > > +LIST_HEAD(ioapic_map); > +LIST_HEAD(hpet_map); > + > /* > * Domain for untranslated devices - only allocated > * if iommu=pt passed on kernel cmd line. > diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c > index 18a89b7..a9f3948 100644 > --- a/drivers/iommu/amd_iommu_init.c > +++ b/drivers/iommu/amd_iommu_init.c > @@ -55,6 +55,7 @@ > #define IVHD_DEV_ALIAS_RANGE 0x43 > #define IVHD_DEV_EXT_SELECT 0x46 > #define IVHD_DEV_EXT_SELECT_RANGE 0x47 > +#define IVHD_DEV_SPECIAL 0x48 > > #define IVHD_FLAG_HT_TUN_EN_MASK 0x01 > #define IVHD_FLAG_PASSPW_EN_MASK 0x02 > @@ -690,6 +691,31 @@ static void __init set_dev_entry_from_acpi(struct amd_iommu *iommu, > set_iommu_for_device(iommu, devid); > } > > +static int add_special_device(u8 type, u8 id, u16 devid) > +{ > + struct devid_map *entry; > + struct list_head *list; > + > + if (type != 1 && type != 2) > + return -EINVAL; Should this be perhaps an enum? or #define? > + > + entry = kzalloc(sizeof(*entry), GFP_KERNEL); > + if (!entry) > + return -ENOMEM; > + > + entry->id = id; > + entry->devid = devid; > + > + if (type == 1) > + list = &ioapic_map; > + else > + list = &hpet_map; > + > + list_add_tail(&entry->list, list); > + > + return 0; > +} > + Reviwed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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