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IOMMU Fixes for Linux 3.7-rc2

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Two fixes this time:
 
 	1. Another fix for a broken BIOS to detect when AMD IOMMU
 	   interrupt remapping can not work reliably
 	2. Typo fix for NVidia IOMMU driver
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Merge tag 'iommu-fixes-v3.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:
 "Two fixes this time:

   1. Another fix for a broken BIOS to detect when AMD IOMMU interrupt
      remapping can not work reliably
   2. Typo fix for NVidia IOMMU driver"

* tag 'iommu-fixes-v3.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/tegra: smmu: Fix deadly typo
  iommu/amd: Work around wrong IOAPIC device-id in IVRS table
This commit is contained in:
Linus Torvalds 2012-10-24 17:05:21 -07:00
commit 735f0a985a
2 changed files with 33 additions and 8 deletions
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39
drivers/iommu/amd_iommu_init.c
View file

@ -1599,21 +1599,46 @@ static void __init free_on_init_error(void)
#endif
}
/* SB IOAPIC is always on this device in AMD systems */
#define IOAPIC_SB_DEVID ((0x00 << 8) | PCI_DEVFN(0x14, 0))
static bool __init check_ioapic_information(void)
{
bool ret, has_sb_ioapic;
int idx;
for (idx = 0; idx < nr_ioapics; idx++) {
int id = mpc_ioapic_id(idx);
has_sb_ioapic = false;
ret = false;
if (get_ioapic_devid(id) < 0) {
pr_err(FW_BUG "AMD-Vi: IO-APIC[%d] not in IVRS table\n", id);
pr_err("AMD-Vi: Disabling interrupt remapping due to BIOS Bug\n");
return false;
for (idx = 0; idx < nr_ioapics; idx++) {
int devid, id = mpc_ioapic_id(idx);
devid = get_ioapic_devid(id);
if (devid < 0) {
pr_err(FW_BUG "AMD-Vi: IOAPIC[%d] not in IVRS table\n", id);
ret = false;
} else if (devid == IOAPIC_SB_DEVID) {
has_sb_ioapic = true;
ret = true;
}
}
return true;
if (!has_sb_ioapic) {
/*
* We expect the SB IOAPIC to be listed in the IVRS
* table. The system timer is connected to the SB IOAPIC
* and if we don't have it in the list the system will
* panic at boot time. This situation usually happens
* when the BIOS is buggy and provides us the wrong
* device id for the IOAPIC in the system.
*/
pr_err(FW_BUG "AMD-Vi: No southbridge IOAPIC found in IVRS table\n");
}
if (!ret)
pr_err("AMD-Vi: Disabling interrupt remapping due to BIOS Bug(s)\n");
return ret;
}
static void __init free_dma_resources(void)

2
drivers/iommu/tegra-smmu.c
View file

@ -200,7 +200,7 @@ enum {
#define SMMU_ADDR_TO_PFN(addr) ((addr) >> 12)
#define SMMU_ADDR_TO_PDN(addr) ((addr) >> 22)
#define SMMU_PDN_TO_ADDR(addr) ((pdn) << 22)
#define SMMU_PDN_TO_ADDR(pdn) ((pdn) << 22)
#define _READABLE (1 << SMMU_PTB_DATA_ASID_READABLE_SHIFT)
#define _WRITABLE (1 << SMMU_PTB_DATA_ASID_WRITABLE_SHIFT)