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path: root/drivers/iommu/amd_iommu_init.c
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Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
-rw-r--r--drivers/iommu/amd_iommu_init.c34
1 files changed, 28 insertions, 6 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 372303700566..2292a6cece76 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -30,6 +30,7 @@
#include <linux/iommu.h>
#include <linux/kmemleak.h>
#include <linux/crash_dump.h>
+#include <linux/mem_encrypt.h>
#include <asm/pci-direct.h>
#include <asm/iommu.h>
#include <asm/gart.h>
@@ -348,7 +349,7 @@ static void iommu_set_device_table(struct amd_iommu *iommu)
BUG_ON(iommu->mmio_base == NULL);
- entry = virt_to_phys(amd_iommu_dev_table);
+ entry = iommu_virt_to_phys(amd_iommu_dev_table);
entry |= (dev_table_size >> 12) - 1;
memcpy_toio(iommu->mmio_base + MMIO_DEV_TABLE_OFFSET,
&entry, sizeof(entry));
@@ -606,7 +607,7 @@ static void iommu_enable_command_buffer(struct amd_iommu *iommu)
BUG_ON(iommu->cmd_buf == NULL);
- entry = (u64)virt_to_phys(iommu->cmd_buf);
+ entry = iommu_virt_to_phys(iommu->cmd_buf);
entry |= MMIO_CMD_SIZE_512;
memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET,
@@ -635,7 +636,7 @@ static void iommu_enable_event_buffer(struct amd_iommu *iommu)
BUG_ON(iommu->evt_buf == NULL);
- entry = (u64)virt_to_phys(iommu->evt_buf) | EVT_LEN_MASK;
+ entry = iommu_virt_to_phys(iommu->evt_buf) | EVT_LEN_MASK;
memcpy_toio(iommu->mmio_base + MMIO_EVT_BUF_OFFSET,
&entry, sizeof(entry));
@@ -668,7 +669,7 @@ static void iommu_enable_ppr_log(struct amd_iommu *iommu)
if (iommu->ppr_log == NULL)
return;
- entry = (u64)virt_to_phys(iommu->ppr_log) | PPR_LOG_SIZE_512;
+ entry = iommu_virt_to_phys(iommu->ppr_log) | PPR_LOG_SIZE_512;
memcpy_toio(iommu->mmio_base + MMIO_PPR_LOG_OFFSET,
&entry, sizeof(entry));
@@ -748,10 +749,10 @@ static int iommu_init_ga_log(struct amd_iommu *iommu)
if (!iommu->ga_log_tail)
goto err_out;
- entry = (u64)virt_to_phys(iommu->ga_log) | GA_LOG_SIZE_512;
+ entry = iommu_virt_to_phys(iommu->ga_log) | GA_LOG_SIZE_512;
memcpy_toio(iommu->mmio_base + MMIO_GA_LOG_BASE_OFFSET,
&entry, sizeof(entry));
- entry = ((u64)virt_to_phys(iommu->ga_log) & 0xFFFFFFFFFFFFFULL) & ~7ULL;
+ entry = (iommu_virt_to_phys(iommu->ga_log) & 0xFFFFFFFFFFFFFULL) & ~7ULL;
memcpy_toio(iommu->mmio_base + MMIO_GA_LOG_TAIL_OFFSET,
&entry, sizeof(entry));
writel(0x00, iommu->mmio_base + MMIO_GA_HEAD_OFFSET);
@@ -2564,6 +2565,24 @@ static int __init amd_iommu_init(void)
return ret;
}
+static bool amd_iommu_sme_check(void)
+{
+ if (!sme_active() || (boot_cpu_data.x86 != 0x17))
+ return true;
+
+ /* For Fam17h, a specific level of support is required */
+ if (boot_cpu_data.microcode >= 0x08001205)
+ return true;
+
+ if ((boot_cpu_data.microcode >= 0x08001126) &&
+ (boot_cpu_data.microcode <= 0x080011ff))
+ return true;
+
+ pr_notice("AMD-Vi: IOMMU not currently supported when SME is active\n");
+
+ return false;
+}
+
/****************************************************************************
*
* Early detect code. This code runs at IOMMU detection time in the DMA
@@ -2578,6 +2597,9 @@ int __init amd_iommu_detect(void)
if (no_iommu || (iommu_detected && !gart_iommu_aperture))
return -ENODEV;
+ if (!amd_iommu_sme_check())
+ return -ENODEV;
+
ret = iommu_go_to_state(IOMMU_IVRS_DETECTED);
if (ret)
return ret;