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Message-Id: <20230301235646.2692846-6-jacob.jun.pan@linux.intel.com>
Date: Wed, 1 Mar 2023 15:56:45 -0800
From: Jacob Pan <jacob.jun.pan@...ux.intel.com>
To: LKML <linux-kernel@...r.kernel.org>, iommu@...ts.linux.dev,
Jason Gunthorpe <jgg@...dia.com>,
"Lu Baolu" <baolu.lu@...ux.intel.com>,
Joerg Roedel <joro@...tes.org>,
Jean-Philippe Brucker <jean-philippe@...aro.com>,
Dave Hansen <dave.hansen@...el.com>,
Thomas Gleixner <tglx@...utronix.de>,
X86 Kernel <x86@...nel.org>, bp@...en8.de,
"H. Peter Anvin" <hpa@...or.com>,
Peter Zijlstra <peterz@...radead.org>, corbet@....net,
vkoul@...nel.org, dmaengine@...r.kernel.org,
linux-doc@...r.kernel.org
Cc: "Robin Murphy" <robin.murphy@....com>,
"Will Deacon" <will@...nel.org>,
David Woodhouse <dwmw2@...radead.org>,
Raj Ashok <ashok.raj@...el.com>,
"Tian, Kevin" <kevin.tian@...el.com>, Yi Liu <yi.l.liu@...el.com>,
"Yu, Fenghua" <fenghua.yu@...el.com>,
Dave Jiang <dave.jiang@...el.com>,
Kirill Shutemov <kirill.shutemov@...ux.intel.com>,
Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: [PATCH v4 5/6] iommu/ioasid: Rename INVALID_IOASID
INVALID_IOASID and IOMMU_PASID_INVALID are duplicated. Rename
INVALID_IOASID and consolidate since we are moving away from IOASID
infrastructure.
Reviewed-by: Dave Jiang <dave.jiang@...el.com>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
---
Documentation/x86/sva.rst | 2 +-
arch/x86/kernel/traps.c | 5 ++++-
drivers/dma/idxd/device.c | 8 ++++----
drivers/dma/idxd/idxd.h | 1 +
drivers/dma/idxd/init.c | 2 +-
drivers/dma/idxd/irq.c | 2 +-
drivers/iommu/intel/dmar.c | 4 ++--
drivers/iommu/intel/iommu.c | 2 +-
drivers/iommu/intel/svm.c | 2 +-
include/linux/ioasid.h | 5 +----
include/linux/iommu-helper.h | 2 +-
include/linux/iommu.h | 7 +++++--
include/linux/sched/mm.h | 2 +-
mm/init-mm.c | 4 ++--
14 files changed, 26 insertions(+), 22 deletions(-)
diff --git a/Documentation/x86/sva.rst b/Documentation/x86/sva.rst
index 2e9b8b0f9a0f..33cb05005982 100644
--- a/Documentation/x86/sva.rst
+++ b/Documentation/x86/sva.rst
@@ -107,7 +107,7 @@ process share the same page tables, thus the same MSR value.
PASID Life Cycle Management
===========================
-PASID is initialized as INVALID_IOASID (-1) when a process is created.
+PASID is initialized as IOMMU_PASID_INVALID (-1) when a process is created.
Only processes that access SVA-capable devices need to have a PASID
allocated. This allocation happens when a process opens/binds an SVA-capable
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index d317dc3d06a3..d6fb03ebf548 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -40,7 +40,10 @@
#include <linux/io.h>
#include <linux/hardirq.h>
#include <linux/atomic.h>
-#include <linux/ioasid.h>
+
+#ifdef CONFIG_IOMMU_SVA
+#include <linux/iommu.h>
+#endif
#include <asm/stacktrace.h>
#include <asm/processor.h>
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 29dbb0f52e18..125652a8bb29 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -1194,7 +1194,7 @@ static void idxd_device_set_perm_entry(struct idxd_device *idxd,
{
union msix_perm mperm;
- if (ie->pasid == INVALID_IOASID)
+ if (ie->pasid == IOMMU_PASID_INVALID)
return;
mperm.bits = 0;
@@ -1224,7 +1224,7 @@ void idxd_wq_free_irq(struct idxd_wq *wq)
idxd_device_clear_perm_entry(idxd, ie);
ie->vector = -1;
ie->int_handle = INVALID_INT_HANDLE;
- ie->pasid = INVALID_IOASID;
+ ie->pasid = IOMMU_PASID_INVALID;
}
int idxd_wq_request_irq(struct idxd_wq *wq)
@@ -1240,7 +1240,7 @@ int idxd_wq_request_irq(struct idxd_wq *wq)
ie = &wq->ie;
ie->vector = pci_irq_vector(pdev, ie->id);
- ie->pasid = device_pasid_enabled(idxd) ? idxd->pasid : INVALID_IOASID;
+ ie->pasid = device_pasid_enabled(idxd) ? idxd->pasid : IOMMU_PASID_INVALID;
idxd_device_set_perm_entry(idxd, ie);
rc = request_threaded_irq(ie->vector, NULL, idxd_wq_thread, 0, "idxd-portal", ie);
@@ -1265,7 +1265,7 @@ int idxd_wq_request_irq(struct idxd_wq *wq)
free_irq(ie->vector, ie);
err_irq:
idxd_device_clear_perm_entry(idxd, ie);
- ie->pasid = INVALID_IOASID;
+ ie->pasid = IOMMU_PASID_INVALID;
return rc;
}
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 7ced8d283d98..417e602a46b6 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -13,6 +13,7 @@
#include <linux/ioasid.h>
#include <linux/bitmap.h>
#include <linux/perf_event.h>
+#include <linux/iommu.h>
#include <uapi/linux/idxd.h>
#include "registers.h"
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 529ea09c9094..f30eef701970 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -105,7 +105,7 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
ie = idxd_get_ie(idxd, msix_idx);
ie->id = msix_idx;
ie->int_handle = INVALID_INT_HANDLE;
- ie->pasid = INVALID_IOASID;
+ ie->pasid = IOMMU_PASID_INVALID;
spin_lock_init(&ie->list_lock);
init_llist_head(&ie->pending_llist);
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index aa314ebec587..242f1f0b9f09 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -80,7 +80,7 @@ static void idxd_int_handle_revoke_drain(struct idxd_irq_entry *ie)
desc.opcode = DSA_OPCODE_DRAIN;
desc.priv = 1;
- if (ie->pasid != INVALID_IOASID)
+ if (ie->pasid != IOMMU_PASID_INVALID)
desc.pasid = ie->pasid;
desc.int_handle = ie->int_handle;
portal = idxd_wq_portal_addr(wq);
diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index bf0bfe5ba7a7..c567f94b66c7 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -1933,7 +1933,7 @@ static int dmar_fault_do_one(struct intel_iommu *iommu, int type,
return 0;
}
- if (pasid == INVALID_IOASID)
+ if (pasid == IOMMU_PASID_INVALID)
pr_err("[%s NO_PASID] Request device [%02x:%02x.%d] fault addr 0x%llx [fault reason 0x%02x] %s\n",
type ? "DMA Read" : "DMA Write",
source_id >> 8, PCI_SLOT(source_id & 0xFF),
@@ -2014,7 +2014,7 @@ irqreturn_t dmar_fault(int irq, void *dev_id)
if (!ratelimited)
/* Using pasid -1 if pasid is not present */
dmar_fault_do_one(iommu, type, fault_reason,
- pasid_present ? pasid : INVALID_IOASID,
+ pasid_present ? pasid : IOMMU_PASID_INVALID,
source_id, guest_addr);
fault_index++;
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index a295e80fdfe8..10f657828d3a 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -876,7 +876,7 @@ void dmar_fault_dump_ptes(struct intel_iommu *iommu, u16 source_id,
return;
}
/* For request-without-pasid, get the pasid from context entry */
- if (intel_iommu_sm && pasid == INVALID_IOASID)
+ if (intel_iommu_sm && pasid == IOMMU_PASID_INVALID)
pasid = PASID_RID2PASID;
dir_index = pasid >> PASID_PDE_SHIFT;
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index c76b66263467..be98af2fce06 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -274,7 +274,7 @@ static int pasid_to_svm_sdev(struct device *dev, unsigned int pasid,
if (WARN_ON(!mutex_is_locked(&pasid_mutex)))
return -EINVAL;
- if (pasid == INVALID_IOASID || pasid >= PASID_MAX)
+ if (pasid == IOMMU_PASID_INVALID || pasid >= PASID_MAX)
return -EINVAL;
svm = pasid_private_find(pasid);
diff --git a/include/linux/ioasid.h b/include/linux/ioasid.h
index 2c502e77ee78..665a3773a409 100644
--- a/include/linux/ioasid.h
+++ b/include/linux/ioasid.h
@@ -7,6 +7,7 @@
#include <linux/iommu-helper.h>
typedef unsigned int ioasid_t;
+#define INVALID_IOASID ((ioasid_t)-1)
typedef ioasid_t (*ioasid_alloc_fn_t)(ioasid_t min, ioasid_t max, void *data);
typedef void (*ioasid_free_fn_t)(ioasid_t ioasid, void *data);
@@ -40,10 +41,6 @@ void *ioasid_find(struct ioasid_set *set, ioasid_t ioasid,
int ioasid_register_allocator(struct ioasid_allocator_ops *allocator);
void ioasid_unregister_allocator(struct ioasid_allocator_ops *allocator);
int ioasid_set_data(ioasid_t ioasid, void *data);
-static inline bool pasid_valid(ioasid_t ioasid)
-{
- return ioasid != INVALID_IOASID;
-}
#else /* !CONFIG_IOASID */
static inline ioasid_t ioasid_alloc(struct ioasid_set *set, ioasid_t min,
diff --git a/include/linux/iommu-helper.h b/include/linux/iommu-helper.h
index 0aa922f6bfad..0147430d8a6c 100644
--- a/include/linux/iommu-helper.h
+++ b/include/linux/iommu-helper.h
@@ -40,6 +40,6 @@ static inline unsigned long iommu_num_pages(unsigned long addr,
return DIV_ROUND_UP(size, io_page_size);
}
-#define INVALID_IOASID (-1U)
+#define IOMMU_PASID_INVALID (-1U)
#endif
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 46e1347bfa22..a694f6256d2d 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -192,8 +192,11 @@ enum iommu_dev_features {
IOMMU_DEV_FEAT_IOPF,
};
-#define IOMMU_PASID_INVALID (-1U)
-
+typedef unsigned int ioasid_t;
+static inline bool pasid_valid(ioasid_t ioasid)
+{
+ return ioasid != IOMMU_PASID_INVALID;
+}
#ifdef CONFIG_IOMMU_API
/**
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
index ae5a3f16b321..0e0aa285a12f 100644
--- a/include/linux/sched/mm.h
+++ b/include/linux/sched/mm.h
@@ -454,7 +454,7 @@ static inline void membarrier_update_current_mm(struct mm_struct *next_mm)
#ifdef CONFIG_IOMMU_SVA
static inline void mm_pasid_init(struct mm_struct *mm)
{
- mm->pasid = INVALID_IOASID;
+ mm->pasid = IOMMU_PASID_INVALID;
}
void mm_pasid_drop(struct mm_struct *mm);
#else
diff --git a/mm/init-mm.c b/mm/init-mm.c
index c9327abb771c..a084039f55d8 100644
--- a/mm/init-mm.c
+++ b/mm/init-mm.c
@@ -10,7 +10,7 @@
#include <linux/atomic.h>
#include <linux/user_namespace.h>
-#include <linux/ioasid.h>
+#include <linux/iommu.h>
#include <asm/mmu.h>
#ifndef INIT_MM_CONTEXT
@@ -40,7 +40,7 @@ struct mm_struct init_mm = {
.user_ns = &init_user_ns,
.cpu_bitmap = CPU_BITS_NONE,
#ifdef CONFIG_IOMMU_SVA
- .pasid = INVALID_IOASID,
+ .pasid = IOMMU_PASID_INVALID,
#endif
INIT_MM_CONTEXT(init_mm)
};
--
2.25.1
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