2 files changed, 27 insertions, 2 deletions

diff --git a/drivers/iommu/riscv/iommu-platform.c b/drivers/iommu/riscv/iommu-platform.c
index 725e919b97ef..83a28c83f991 100644
--- a/drivers/iommu/riscv/iommu-platform.c
+++ b/drivers/iommu/riscv/iommu-platform.c
@@ -10,6 +10,8 @@
  *	Tomasz Jeznach <tjeznach@rivosinc.com>
  */
 
+#include <linux/acpi.h>
+#include <linux/irqchip/riscv-imsic.h>
 #include <linux/kernel.h>
 #include <linux/msi.h>
 #include <linux/of_irq.h>
@@ -46,6 +48,7 @@ static int riscv_iommu_platform_probe(struct platform_device *pdev)
 	enum riscv_iommu_igs_settings igs;
 	struct device *dev = &pdev->dev;
 	struct riscv_iommu_device *iommu = NULL;
+	struct irq_domain *msi_domain;
 	struct resource *res = NULL;
 	int vec, ret;
 
@@ -76,8 +79,13 @@ static int riscv_iommu_platform_probe(struct platform_device *pdev)
 	switch (igs) {
 	case RISCV_IOMMU_CAPABILITIES_IGS_BOTH:
 	case RISCV_IOMMU_CAPABILITIES_IGS_MSI:
-		if (is_of_node(dev->fwnode))
+		if (is_of_node(dev_fwnode(dev))) {
 			of_msi_configure(dev, to_of_node(dev->fwnode));
+		} else {
+			msi_domain = irq_find_matching_fwnode(imsic_acpi_get_fwnode(dev),
+							      DOMAIN_BUS_PLATFORM_MSI);
+			dev_set_msi_domain(dev, msi_domain);
+		}
 
 		if (!dev_get_msi_domain(dev)) {
 			dev_warn(dev, "failed to find an MSI domain\n");
@@ -150,6 +158,12 @@ static const struct of_device_id riscv_iommu_of_match[] = {
 	{},
 };
 
+static const struct acpi_device_id riscv_iommu_acpi_match[] = {
+	{ "RSCV0004", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, riscv_iommu_acpi_match);
+
 static struct platform_driver riscv_iommu_platform_driver = {
 	.probe = riscv_iommu_platform_probe,
 	.remove = riscv_iommu_platform_remove,
@@ -158,6 +172,7 @@ static struct platform_driver riscv_iommu_platform_driver = {
 		.name = "riscv,iommu",
 		.of_match_table = riscv_iommu_of_match,
 		.suppress_bind_attrs = true,
+		.acpi_match_table = riscv_iommu_acpi_match,
 	},
 };
 
diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c
index 2d0d31ba2886..ebb22979075d 100644
--- a/drivers/iommu/riscv/iommu.c
+++ b/drivers/iommu/riscv/iommu.c
@@ -12,6 +12,8 @@
 
 #define pr_fmt(fmt) "riscv-iommu: " fmt
 
+#include <linux/acpi.h>
+#include <linux/acpi_rimt.h>
 #include <linux/compiler.h>
 #include <linux/crash_dump.h>
 #include <linux/init.h>
@@ -1283,7 +1285,7 @@ static phys_addr_t riscv_iommu_iova_to_phys(struct iommu_domain *iommu_domain,
 	unsigned long *ptr;
 
 	ptr = riscv_iommu_pte_fetch(domain, iova, &pte_size);
-	if (_io_pte_none(*ptr) || !_io_pte_present(*ptr))
+	if (!ptr)
 		return 0;
 
 	return pfn_to_phys(__page_val_to_pfn(*ptr)) | (iova & (pte_size - 1));
@@ -1650,6 +1652,14 @@ int riscv_iommu_init(struct riscv_iommu_device *iommu)
 		goto err_iodir_off;
 	}
 
+	if (!acpi_disabled) {
+		rc = rimt_iommu_register(iommu->dev);
+		if (rc) {
+			dev_err_probe(iommu->dev, rc, "cannot register iommu with RIMT\n");
+			goto err_remove_sysfs;
+		}
+	}
+
 	rc = iommu_device_register(&iommu->iommu, &riscv_iommu_ops, iommu->dev);
 	if (rc) {
 		dev_err_probe(iommu->dev, rc, "cannot register iommu interface\n");