| Message ID | 20200915082936.23663-9-paul@xen.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | IOMMU cleanup | expand |
> From: Paul Durrant <paul@xen.org> > Sent: Tuesday, September 15, 2020 4:30 PM > > From: Paul Durrant <pdurrant@amazon.com> > > It's confusing and not consistent with the terminology introduced with 'dfn_t'. > Just call them IOMMU page tables. > > Also remove a pointless check of the 'acpi_drhd_units' list in > vtd_dump_page_table_level(). If the list is empty then IOMMU mappings > would > not have been enabled for the domain in the first place. > > NOTE: All calls to printk() have also been removed from > iommu_dump_page_tables(); the implementation specific code is now > responsible for all output. > The check for the global 'iommu_enabled' has also been replaced by an > ASSERT since iommu_dump_page_tables() is not registered as a key > handler > unless IOMMU mappings are enabled. > Error messages are now prefixed with the name of the function. > > Signed-off-by: Paul Durrant <pdurrant@amazon.com> > Reviewed-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> > --- > Cc: Andrew Cooper <andrew.cooper3@citrix.com> > Cc: Kevin Tian <kevin.tian@intel.com> > > v6: > - Cosmetic adjustment > - Drop use of __func__ > > v5: > - Make sure domain id is in the output > - Use VTDPREFIX in output for consistency > > v2: > - Moved all output into implementation specific code > --- > xen/drivers/passthrough/amd/pci_amd_iommu.c | 20 +++++++------- > xen/drivers/passthrough/iommu.c | 21 ++++----------- > xen/drivers/passthrough/vtd/iommu.c | 30 ++++++++++++--------- > xen/include/xen/iommu.h | 2 +- > 4 files changed, 33 insertions(+), 40 deletions(-) > > diff --git a/xen/drivers/passthrough/amd/pci_amd_iommu.c > b/xen/drivers/passthrough/amd/pci_amd_iommu.c > index 3390c22cf3..5fe9dc849d 100644 > --- a/xen/drivers/passthrough/amd/pci_amd_iommu.c > +++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c > @@ -491,8 +491,8 @@ static int amd_iommu_group_id(u16 seg, u8 bus, u8 > devfn) > > #include <asm/io_apic.h> > > -static void amd_dump_p2m_table_level(struct page_info* pg, int level, > - paddr_t gpa, int indent) > +static void amd_dump_page_table_level(struct page_info *pg, int level, > + paddr_t gpa, int indent) > { > paddr_t address; > struct amd_iommu_pte *table_vaddr; > @@ -504,7 +504,7 @@ static void amd_dump_p2m_table_level(struct > page_info* pg, int level, > table_vaddr = __map_domain_page(pg); > if ( table_vaddr == NULL ) > { > - printk("Failed to map IOMMU domain page %"PRIpaddr"\n", > + printk("AMD IOMMU failed to map domain page %"PRIpaddr"\n", > page_to_maddr(pg)); > return; > } > @@ -521,7 +521,7 @@ static void amd_dump_p2m_table_level(struct > page_info* pg, int level, > > if ( pde->next_level && (pde->next_level != (level - 1)) ) > { > - printk("IOMMU p2m table error. next_level = %d, expected %d\n", > + printk("AMD IOMMU table error. next_level = %d, expected %d\n", > pde->next_level, level - 1); > > continue; > @@ -529,7 +529,7 @@ static void amd_dump_p2m_table_level(struct > page_info* pg, int level, > > address = gpa + amd_offset_level_address(index, level); > if ( pde->next_level >= 1 ) > - amd_dump_p2m_table_level( > + amd_dump_page_table_level( > mfn_to_page(_mfn(pde->mfn)), pde->next_level, > address, indent + 1); > else > @@ -542,16 +542,16 @@ static void amd_dump_p2m_table_level(struct > page_info* pg, int level, > unmap_domain_page(table_vaddr); > } > > -static void amd_dump_p2m_table(struct domain *d) > +static void amd_dump_page_tables(struct domain *d) > { > const struct domain_iommu *hd = dom_iommu(d); > > if ( !hd->arch.amd.root_table ) > return; > > - printk("p2m table has %u levels\n", hd->arch.amd.paging_mode); > - amd_dump_p2m_table_level(hd->arch.amd.root_table, > - hd->arch.amd.paging_mode, 0, 0); > + printk("AMD IOMMU %pd table has %u levels\n", d, hd- > >arch.amd.paging_mode); > + amd_dump_page_table_level(hd->arch.amd.root_table, > + hd->arch.amd.paging_mode, 0, 0); > } > > static const struct iommu_ops __initconstrel _iommu_ops = { > @@ -578,7 +578,7 @@ static const struct iommu_ops __initconstrel > _iommu_ops = { > .suspend = amd_iommu_suspend, > .resume = amd_iommu_resume, > .crash_shutdown = amd_iommu_crash_shutdown, > - .dump_p2m_table = amd_dump_p2m_table, > + .dump_page_tables = amd_dump_page_tables, > }; > > static const struct iommu_init_ops __initconstrel _iommu_init_ops = { > diff --git a/xen/drivers/passthrough/iommu.c > b/xen/drivers/passthrough/iommu.c > index 90748062e5..8fae77b593 100644 > --- a/xen/drivers/passthrough/iommu.c > +++ b/xen/drivers/passthrough/iommu.c > @@ -22,7 +22,7 @@ > #include <xen/keyhandler.h> > #include <xsm/xsm.h> > > -static void iommu_dump_p2m_table(unsigned char key); > +static void iommu_dump_page_tables(unsigned char key); > > unsigned int __read_mostly iommu_dev_iotlb_timeout = 1000; > integer_param("iommu_dev_iotlb_timeout", iommu_dev_iotlb_timeout); > @@ -212,7 +212,7 @@ void __hwdom_init iommu_hwdom_init(struct > domain *d) > if ( !is_iommu_enabled(d) ) > return; > > - register_keyhandler('o', &iommu_dump_p2m_table, "dump iommu p2m > table", 0); > + register_keyhandler('o', &iommu_dump_page_tables, "dump iommu > page tables", 0); > > hd->platform_ops->hwdom_init(d); > } > @@ -535,16 +535,12 @@ bool_t iommu_has_feature(struct domain *d, > enum iommu_feature feature) > return is_iommu_enabled(d) && test_bit(feature, dom_iommu(d)- > >features); > } > > -static void iommu_dump_p2m_table(unsigned char key) > +static void iommu_dump_page_tables(unsigned char key) > { > struct domain *d; > const struct iommu_ops *ops; > > - if ( !iommu_enabled ) > - { > - printk("IOMMU not enabled!\n"); > - return; > - } > + ASSERT(iommu_enabled); > > ops = iommu_get_ops(); > > @@ -555,14 +551,7 @@ static void iommu_dump_p2m_table(unsigned char > key) > if ( is_hardware_domain(d) || !is_iommu_enabled(d) ) > continue; > > - if ( iommu_use_hap_pt(d) ) > - { > - printk("\ndomain%d IOMMU p2m table shared with MMU: \n", d- > >domain_id); > - continue; > - } > - > - printk("\ndomain%d IOMMU p2m table: \n", d->domain_id); > - ops->dump_p2m_table(d); > + ops->dump_page_tables(d); > } > > rcu_read_unlock(&domlist_read_lock); > diff --git a/xen/drivers/passthrough/vtd/iommu.c > b/xen/drivers/passthrough/vtd/iommu.c > index 58d4550a4c..faf258e699 100644 > --- a/xen/drivers/passthrough/vtd/iommu.c > +++ b/xen/drivers/passthrough/vtd/iommu.c > @@ -2582,8 +2582,8 @@ static void vtd_resume(void) > } > } > > -static void vtd_dump_p2m_table_level(paddr_t pt_maddr, int level, paddr_t > gpa, > - int indent) > +static void vtd_dump_page_table_level(paddr_t pt_maddr, int level, > paddr_t gpa, > + int indent) > { > paddr_t address; > int i; > @@ -2596,7 +2596,8 @@ static void vtd_dump_p2m_table_level(paddr_t > pt_maddr, int level, paddr_t gpa, > pt_vaddr = map_vtd_domain_page(pt_maddr); > if ( pt_vaddr == NULL ) > { > - printk("Failed to map VT-D domain page %"PRIpaddr"\n", pt_maddr); > + printk(VTDPREFIX " failed to map domain page %"PRIpaddr"\n", > + pt_maddr); > return; > } > > @@ -2612,8 +2613,8 @@ static void vtd_dump_p2m_table_level(paddr_t > pt_maddr, int level, paddr_t gpa, > > address = gpa + offset_level_address(i, level); > if ( next_level >= 1 ) > - vtd_dump_p2m_table_level(dma_pte_addr(*pte), next_level, > - address, indent + 1); > + vtd_dump_page_table_level(dma_pte_addr(*pte), next_level, > + address, indent + 1); > else > printk("%*sdfn: %08lx mfn: %08lx\n", > indent, "", > @@ -2624,17 +2625,20 @@ static void vtd_dump_p2m_table_level(paddr_t > pt_maddr, int level, paddr_t gpa, > unmap_vtd_domain_page(pt_vaddr); > } > > -static void vtd_dump_p2m_table(struct domain *d) > +static void vtd_dump_page_tables(struct domain *d) > { > - const struct domain_iommu *hd; > + const struct domain_iommu *hd = dom_iommu(d); > > - if ( list_empty(&acpi_drhd_units) ) > + if ( iommu_use_hap_pt(d) ) > + { > + printk(VTDPREFIX " %pd sharing EPT table\n", d); > return; > + } > > - hd = dom_iommu(d); > - printk("p2m table has %d levels\n", agaw_to_level(hd->arch.vtd.agaw)); > - vtd_dump_p2m_table_level(hd->arch.vtd.pgd_maddr, > - agaw_to_level(hd->arch.vtd.agaw), 0, 0); > + printk(VTDPREFIX" %pd table has %d levels\n", d, > + agaw_to_level(hd->arch.vtd.agaw)); > + vtd_dump_page_table_level(hd->arch.vtd.pgd_maddr, > + agaw_to_level(hd->arch.vtd.agaw), 0, 0); > } > > static int __init intel_iommu_quarantine_init(struct domain *d) > @@ -2734,7 +2738,7 @@ static struct iommu_ops __initdata vtd_ops = { > .iotlb_flush = iommu_flush_iotlb_pages, > .iotlb_flush_all = iommu_flush_iotlb_all, > .get_reserved_device_memory = > intel_iommu_get_reserved_device_memory, > - .dump_p2m_table = vtd_dump_p2m_table, > + .dump_page_tables = vtd_dump_page_tables, > }; > > const struct iommu_init_ops __initconstrel intel_iommu_init_ops = { > diff --git a/xen/include/xen/iommu.h b/xen/include/xen/iommu.h > index 373145266f..7a539522b1 100644 > --- a/xen/include/xen/iommu.h > +++ b/xen/include/xen/iommu.h > @@ -276,7 +276,7 @@ struct iommu_ops { > unsigned int flush_flags); > int __must_check (*iotlb_flush_all)(struct domain *d); > int (*get_reserved_device_memory)(iommu_grdm_t *, void *); > - void (*dump_p2m_table)(struct domain *d); > + void (*dump_page_tables)(struct domain *d); > > #ifdef CONFIG_HAS_DEVICE_TREE > /* > -- > 2.20.1
diff --git a/xen/drivers/passthrough/amd/pci_amd_iommu.c b/xen/drivers/passthrough/amd/pci_amd_iommu.c index 3390c22cf3..5fe9dc849d 100644 --- a/xen/drivers/passthrough/amd/pci_amd_iommu.c +++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c @@ -491,8 +491,8 @@ static int amd_iommu_group_id(u16 seg, u8 bus, u8 devfn) #include <asm/io_apic.h> -static void amd_dump_p2m_table_level(struct page_info* pg, int level, - paddr_t gpa, int indent) +static void amd_dump_page_table_level(struct page_info *pg, int level, + paddr_t gpa, int indent) { paddr_t address; struct amd_iommu_pte *table_vaddr; @@ -504,7 +504,7 @@ static void amd_dump_p2m_table_level(struct page_info* pg, int level, table_vaddr = __map_domain_page(pg); if ( table_vaddr == NULL ) { - printk("Failed to map IOMMU domain page %"PRIpaddr"\n", + printk("AMD IOMMU failed to map domain page %"PRIpaddr"\n", page_to_maddr(pg)); return; } @@ -521,7 +521,7 @@ static void amd_dump_p2m_table_level(struct page_info* pg, int level, if ( pde->next_level && (pde->next_level != (level - 1)) ) { - printk("IOMMU p2m table error. next_level = %d, expected %d\n", + printk("AMD IOMMU table error. next_level = %d, expected %d\n", pde->next_level, level - 1); continue; @@ -529,7 +529,7 @@ static void amd_dump_p2m_table_level(struct page_info* pg, int level, address = gpa + amd_offset_level_address(index, level); if ( pde->next_level >= 1 ) - amd_dump_p2m_table_level( + amd_dump_page_table_level( mfn_to_page(_mfn(pde->mfn)), pde->next_level, address, indent + 1); else @@ -542,16 +542,16 @@ static void amd_dump_p2m_table_level(struct page_info* pg, int level, unmap_domain_page(table_vaddr); } -static void amd_dump_p2m_table(struct domain *d) +static void amd_dump_page_tables(struct domain *d) { const struct domain_iommu *hd = dom_iommu(d); if ( !hd->arch.amd.root_table ) return; - printk("p2m table has %u levels\n", hd->arch.amd.paging_mode); - amd_dump_p2m_table_level(hd->arch.amd.root_table, - hd->arch.amd.paging_mode, 0, 0); + printk("AMD IOMMU %pd table has %u levels\n", d, hd->arch.amd.paging_mode); + amd_dump_page_table_level(hd->arch.amd.root_table, + hd->arch.amd.paging_mode, 0, 0); } static const struct iommu_ops __initconstrel _iommu_ops = { @@ -578,7 +578,7 @@ static const struct iommu_ops __initconstrel _iommu_ops = { .suspend = amd_iommu_suspend, .resume = amd_iommu_resume, .crash_shutdown = amd_iommu_crash_shutdown, - .dump_p2m_table = amd_dump_p2m_table, + .dump_page_tables = amd_dump_page_tables, }; static const struct iommu_init_ops __initconstrel _iommu_init_ops = { diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c index 90748062e5..8fae77b593 100644 --- a/xen/drivers/passthrough/iommu.c +++ b/xen/drivers/passthrough/iommu.c @@ -22,7 +22,7 @@ #include <xen/keyhandler.h> #include <xsm/xsm.h> -static void iommu_dump_p2m_table(unsigned char key); +static void iommu_dump_page_tables(unsigned char key); unsigned int __read_mostly iommu_dev_iotlb_timeout = 1000; integer_param("iommu_dev_iotlb_timeout", iommu_dev_iotlb_timeout); @@ -212,7 +212,7 @@ void __hwdom_init iommu_hwdom_init(struct domain *d) if ( !is_iommu_enabled(d) ) return; - register_keyhandler('o', &iommu_dump_p2m_table, "dump iommu p2m table", 0); + register_keyhandler('o', &iommu_dump_page_tables, "dump iommu page tables", 0); hd->platform_ops->hwdom_init(d); } @@ -535,16 +535,12 @@ bool_t iommu_has_feature(struct domain *d, enum iommu_feature feature) return is_iommu_enabled(d) && test_bit(feature, dom_iommu(d)->features); } -static void iommu_dump_p2m_table(unsigned char key) +static void iommu_dump_page_tables(unsigned char key) { struct domain *d; const struct iommu_ops *ops; - if ( !iommu_enabled ) - { - printk("IOMMU not enabled!\n"); - return; - } + ASSERT(iommu_enabled); ops = iommu_get_ops(); @@ -555,14 +551,7 @@ static void iommu_dump_p2m_table(unsigned char key) if ( is_hardware_domain(d) || !is_iommu_enabled(d) ) continue; - if ( iommu_use_hap_pt(d) ) - { - printk("\ndomain%d IOMMU p2m table shared with MMU: \n", d->domain_id); - continue; - } - - printk("\ndomain%d IOMMU p2m table: \n", d->domain_id); - ops->dump_p2m_table(d); + ops->dump_page_tables(d); } rcu_read_unlock(&domlist_read_lock); diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c index 58d4550a4c..faf258e699 100644 --- a/xen/drivers/passthrough/vtd/iommu.c +++ b/xen/drivers/passthrough/vtd/iommu.c @@ -2582,8 +2582,8 @@ static void vtd_resume(void) } } -static void vtd_dump_p2m_table_level(paddr_t pt_maddr, int level, paddr_t gpa, - int indent) +static void vtd_dump_page_table_level(paddr_t pt_maddr, int level, paddr_t gpa, + int indent) { paddr_t address; int i; @@ -2596,7 +2596,8 @@ static void vtd_dump_p2m_table_level(paddr_t pt_maddr, int level, paddr_t gpa, pt_vaddr = map_vtd_domain_page(pt_maddr); if ( pt_vaddr == NULL ) { - printk("Failed to map VT-D domain page %"PRIpaddr"\n", pt_maddr); + printk(VTDPREFIX " failed to map domain page %"PRIpaddr"\n", + pt_maddr); return; } @@ -2612,8 +2613,8 @@ static void vtd_dump_p2m_table_level(paddr_t pt_maddr, int level, paddr_t gpa, address = gpa + offset_level_address(i, level); if ( next_level >= 1 ) - vtd_dump_p2m_table_level(dma_pte_addr(*pte), next_level, - address, indent + 1); + vtd_dump_page_table_level(dma_pte_addr(*pte), next_level, + address, indent + 1); else printk("%*sdfn: %08lx mfn: %08lx\n", indent, "", @@ -2624,17 +2625,20 @@ static void vtd_dump_p2m_table_level(paddr_t pt_maddr, int level, paddr_t gpa, unmap_vtd_domain_page(pt_vaddr); } -static void vtd_dump_p2m_table(struct domain *d) +static void vtd_dump_page_tables(struct domain *d) { - const struct domain_iommu *hd; + const struct domain_iommu *hd = dom_iommu(d); - if ( list_empty(&acpi_drhd_units) ) + if ( iommu_use_hap_pt(d) ) + { + printk(VTDPREFIX " %pd sharing EPT table\n", d); return; + } - hd = dom_iommu(d); - printk("p2m table has %d levels\n", agaw_to_level(hd->arch.vtd.agaw)); - vtd_dump_p2m_table_level(hd->arch.vtd.pgd_maddr, - agaw_to_level(hd->arch.vtd.agaw), 0, 0); + printk(VTDPREFIX" %pd table has %d levels\n", d, + agaw_to_level(hd->arch.vtd.agaw)); + vtd_dump_page_table_level(hd->arch.vtd.pgd_maddr, + agaw_to_level(hd->arch.vtd.agaw), 0, 0); } static int __init intel_iommu_quarantine_init(struct domain *d) @@ -2734,7 +2738,7 @@ static struct iommu_ops __initdata vtd_ops = { .iotlb_flush = iommu_flush_iotlb_pages, .iotlb_flush_all = iommu_flush_iotlb_all, .get_reserved_device_memory = intel_iommu_get_reserved_device_memory, - .dump_p2m_table = vtd_dump_p2m_table, + .dump_page_tables = vtd_dump_page_tables, }; const struct iommu_init_ops __initconstrel intel_iommu_init_ops = { diff --git a/xen/include/xen/iommu.h b/xen/include/xen/iommu.h index 373145266f..7a539522b1 100644 --- a/xen/include/xen/iommu.h +++ b/xen/include/xen/iommu.h @@ -276,7 +276,7 @@ struct iommu_ops { unsigned int flush_flags); int __must_check (*iotlb_flush_all)(struct domain *d); int (*get_reserved_device_memory)(iommu_grdm_t *, void *); - void (*dump_p2m_table)(struct domain *d); + void (*dump_page_tables)(struct domain *d); #ifdef CONFIG_HAS_DEVICE_TREE /*