diff options
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/inode.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/Kconfig | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/cc_platform.c | 26 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/eeh_pseries.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/iommu.c | 27 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/msi.c | 15 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/svm.c | 5 |
8 files changed, 66 insertions, 15 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c index bed05b644c2c..cb25acccd746 100644 --- a/arch/powerpc/platforms/cell/spufs/inode.c +++ b/arch/powerpc/platforms/cell/spufs/inode.c @@ -21,6 +21,7 @@ #include <linux/namei.h> #include <linux/pagemap.h> #include <linux/poll.h> +#include <linux/seq_file.h> #include <linux/slab.h> #include <asm/prom.h> diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig index 5e037df2a3a1..2e57391e0778 100644 --- a/arch/powerpc/platforms/pseries/Kconfig +++ b/arch/powerpc/platforms/pseries/Kconfig @@ -159,6 +159,7 @@ config PPC_SVM select SWIOTLB select ARCH_HAS_MEM_ENCRYPT select ARCH_HAS_FORCE_DMA_UNENCRYPTED + select ARCH_HAS_CC_PLATFORM help There are certain POWER platforms which support secure guests using the Protected Execution Facility, with the help of an Ultravisor diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 4cda0ef87be0..41d8aee98da4 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -31,3 +31,5 @@ obj-$(CONFIG_FA_DUMP) += rtas-fadump.o obj-$(CONFIG_SUSPEND) += suspend.o obj-$(CONFIG_PPC_VAS) += vas.o + +obj-$(CONFIG_ARCH_HAS_CC_PLATFORM) += cc_platform.o diff --git a/arch/powerpc/platforms/pseries/cc_platform.c b/arch/powerpc/platforms/pseries/cc_platform.c new file mode 100644 index 000000000000..e8021af83a19 --- /dev/null +++ b/arch/powerpc/platforms/pseries/cc_platform.c @@ -0,0 +1,26 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Confidential Computing Platform Capability checks + * + * Copyright (C) 2021 Advanced Micro Devices, Inc. + * + * Author: Tom Lendacky <thomas.lendacky@amd.com> + */ + +#include <linux/export.h> +#include <linux/cc_platform.h> + +#include <asm/machdep.h> +#include <asm/svm.h> + +bool cc_platform_has(enum cc_attr attr) +{ + switch (attr) { + case CC_ATTR_MEM_ENCRYPT: + return is_secure_guest(); + + default: + return false; + } +} +EXPORT_SYMBOL_GPL(cc_platform_has); diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c index bc15200852b7..09fafcf2d3a0 100644 --- a/arch/powerpc/platforms/pseries/eeh_pseries.c +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c @@ -867,6 +867,10 @@ static int __init eeh_pseries_init(void) if (is_kdump_kernel() || reset_devices) { pr_info("Issue PHB reset ...\n"); list_for_each_entry(phb, &hose_list, list_node) { + // Skip if the slot is empty + if (list_empty(&PCI_DN(phb->dn)->child_list)) + continue; + pdn = list_first_entry(&PCI_DN(phb->dn)->child_list, struct pci_dn, list); config_addr = pseries_eeh_get_pe_config_addr(pdn); diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index dab5c56ffd0e..a52af8fbf571 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -1302,6 +1302,12 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn) struct property *default_win; int reset_win_ext; + /* DDW + IOMMU on single window may fail if there is any allocation */ + if (iommu_table_in_use(tbl)) { + dev_warn(&dev->dev, "current IOMMU table in use, can't be replaced.\n"); + goto out_failed; + } + default_win = of_find_property(pdn, "ibm,dma-window", NULL); if (!default_win) goto out_failed; @@ -1356,12 +1362,6 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn) query.largest_available_block, 1ULL << page_shift); - /* DDW + IOMMU on single window may fail if there is any allocation */ - if (default_win_removed && iommu_table_in_use(tbl)) { - dev_dbg(&dev->dev, "current IOMMU table in use, can't be replaced.\n"); - goto out_failed; - } - len = order_base_2(query.largest_available_block << page_shift); win_name = DMA64_PROPNAME; } else { @@ -1411,18 +1411,19 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn) } else { struct iommu_table *newtbl; int i; + unsigned long start = 0, end = 0; for (i = 0; i < ARRAY_SIZE(pci->phb->mem_resources); i++) { const unsigned long mask = IORESOURCE_MEM_64 | IORESOURCE_MEM; /* Look for MMIO32 */ - if ((pci->phb->mem_resources[i].flags & mask) == IORESOURCE_MEM) + if ((pci->phb->mem_resources[i].flags & mask) == IORESOURCE_MEM) { + start = pci->phb->mem_resources[i].start; + end = pci->phb->mem_resources[i].end; break; + } } - if (i == ARRAY_SIZE(pci->phb->mem_resources)) - goto out_del_list; - /* New table for using DDW instead of the default DMA window */ newtbl = iommu_pseries_alloc_table(pci->phb->node); if (!newtbl) { @@ -1432,15 +1433,15 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn) iommu_table_setparms_common(newtbl, pci->phb->bus->number, create.liobn, win_addr, 1UL << len, page_shift, NULL, &iommu_table_lpar_multi_ops); - iommu_init_table(newtbl, pci->phb->node, pci->phb->mem_resources[i].start, - pci->phb->mem_resources[i].end); + iommu_init_table(newtbl, pci->phb->node, start, end); pci->table_group->tables[1] = newtbl; /* Keep default DMA window stuct if removed */ if (default_win_removed) { tbl->it_size = 0; - kfree(tbl->it_map); + vfree(tbl->it_map); + tbl->it_map = NULL; } set_iommu_table_base(&dev->dev, newtbl); diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c index 1b305e411862..8627362f613e 100644 --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -507,12 +507,27 @@ static void pseries_msi_unmask(struct irq_data *d) irq_chip_unmask_parent(d); } +static void pseries_msi_write_msg(struct irq_data *data, struct msi_msg *msg) +{ + struct msi_desc *entry = irq_data_get_msi_desc(data); + + /* + * Do not update the MSIx vector table. It's not strictly necessary + * because the table is initialized by the underlying hypervisor, PowerVM + * or QEMU/KVM. However, if the MSIx vector entry is cleared, any further + * activation will fail. This can happen in some drivers (eg. IPR) which + * deactivate an IRQ used for testing MSI support. + */ + entry->msg = *msg; +} + static struct irq_chip pseries_pci_msi_irq_chip = { .name = "pSeries-PCI-MSI", .irq_shutdown = pseries_msi_shutdown, .irq_mask = pseries_msi_mask, .irq_unmask = pseries_msi_unmask, .irq_eoi = irq_chip_eoi_parent, + .irq_write_msi_msg = pseries_msi_write_msg, }; static struct msi_domain_info pseries_msi_domain_info = { diff --git a/arch/powerpc/platforms/pseries/svm.c b/arch/powerpc/platforms/pseries/svm.c index 87f001b4c4e4..c083ecbbae4d 100644 --- a/arch/powerpc/platforms/pseries/svm.c +++ b/arch/powerpc/platforms/pseries/svm.c @@ -8,6 +8,7 @@ #include <linux/mm.h> #include <linux/memblock.h> +#include <linux/cc_platform.h> #include <asm/machdep.h> #include <asm/svm.h> #include <asm/swiotlb.h> @@ -63,7 +64,7 @@ void __init svm_swiotlb_init(void) int set_memory_encrypted(unsigned long addr, int numpages) { - if (!mem_encrypt_active()) + if (!cc_platform_has(CC_ATTR_MEM_ENCRYPT)) return 0; if (!PAGE_ALIGNED(addr)) @@ -76,7 +77,7 @@ int set_memory_encrypted(unsigned long addr, int numpages) int set_memory_decrypted(unsigned long addr, int numpages) { - if (!mem_encrypt_active()) + if (!cc_platform_has(CC_ATTR_MEM_ENCRYPT)) return 0; if (!PAGE_ALIGNED(addr)) |