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iommu fixes for -rc5

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- Fix boot when intel iommu initialisation fails under TXT (tboot)
 
 - Fix intel iommu compilation error when DMAR is enabled without ATS
 
 - Temporarily update IOMMU MAINTAINERs entry
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Merge tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull iommu fixes from Will Deacon:
 "Two straightforward vt-d fixes:

   - Fix boot when intel iommu initialisation fails under TXT (tboot)

   - Fix intel iommu compilation error when DMAR is enabled without ATS

  and temporarily update IOMMU MAINTAINERs entry"

* tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  MAINTAINERS: Temporarily add myself to the IOMMU entry
  iommu/vt-d: Fix compile error with CONFIG_PCI_ATS not set
  iommu/vt-d: Avoid panic if iommu init fails in tboot system
This commit is contained in:
Linus Torvalds 2020-11-20 10:20:16 -08:00
commit fc8299f9f3
5 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MAINTAINERS
View File

@ -9162,6 +9162,7 @@ F: include/linux/iomap.h
IOMMU DRIVERS
M: Joerg Roedel <joro@8bytes.org>
M: Will Deacon <will@kernel.org>
L: iommu@lists.linux-foundation.org
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git

3
arch/x86/kernel/tboot.c
View File

@ -514,9 +514,6 @@ int tboot_force_iommu(void)
if (!tboot_enabled())
return 0;
if (intel_iommu_tboot_noforce)
return 1;
if (no_iommu || swiotlb || dmar_disabled)
pr_warn("Forcing Intel-IOMMU to enabled\n");

4
drivers/iommu/intel/dmar.c
View File

@ -335,7 +335,9 @@ static void dmar_pci_bus_del_dev(struct dmar_pci_notify_info *info)
static inline void vf_inherit_msi_domain(struct pci_dev *pdev)
{
dev_set_msi_domain(&pdev->dev, dev_get_msi_domain(&pdev->physfn->dev));
struct pci_dev *physfn = pci_physfn(pdev);
dev_set_msi_domain(&pdev->dev, dev_get_msi_domain(&physfn->dev));
}
static int dmar_pci_bus_notifier(struct notifier_block *nb,

5
drivers/iommu/intel/iommu.c
View File

@ -179,7 +179,7 @@ static int rwbf_quirk;
* (used when kernel is launched w/ TXT)
*/
static int force_on = 0;
int intel_iommu_tboot_noforce;
static int intel_iommu_tboot_noforce;
static int no_platform_optin;
#define ROOT_ENTRY_NR (VTD_PAGE_SIZE/sizeof(struct root_entry))
@ -4884,7 +4884,8 @@ int __init intel_iommu_init(void)
* Intel IOMMU is required for a TXT/tboot launch or platform
* opt in, so enforce that.
*/
force_on = tboot_force_iommu() || platform_optin_force_iommu();
force_on = (!intel_iommu_tboot_noforce && tboot_force_iommu()) ||
platform_optin_force_iommu();
if (iommu_init_mempool()) {
if (force_on)

1
include/linux/intel-iommu.h
View File

@ -798,7 +798,6 @@ extern int iommu_calculate_agaw(struct intel_iommu *iommu);
extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
extern int dmar_disabled;
extern int intel_iommu_enabled;
extern int intel_iommu_tboot_noforce;
extern int intel_iommu_gfx_mapped;
#else
static inline int iommu_calculate_agaw(struct intel_iommu *iommu)