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From: Fenghua Yu <fenghua.yu@intel.com>
To: "Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Borislav Petkov" <bp@alien8.de>, "H Peter Anvin" <hpa@zytor.com>,
	"Andy Lutomirski" <luto@kernel.org>,
	"Jean-Philippe Brucker" <jean-philippe@linaro.org>,
	"Christoph Hellwig" <hch@infradead.org>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"David Woodhouse" <dwmw2@infradead.org>,
	"Lu Baolu" <baolu.lu@linux.intel.com>,
	"Dave Hansen" <dave.hansen@intel.com>,
	"Tony Luck" <tony.luck@intel.com>,
	"Ashok Raj" <ashok.raj@intel.com>,
	"Jacob Jun Pan" <jacob.jun.pan@intel.com>,
	"Dave Jiang" <dave.jiang@intel.com>,
	"Sohil Mehta" <sohil.mehta@intel.com>,
	"Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>,
	iommu@lists.linux-foundation.org, x86 <x86@kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>
Subject: [PATCH v7 7/9] mm: Define pasid in mm
Date: Thu, 27 Aug 2020 08:06:32 -0700	[thread overview]
Message-ID: <1598540794-132666-8-git-send-email-fenghua.yu@intel.com> (raw)
In-Reply-To: <1598540794-132666-1-git-send-email-fenghua.yu@intel.com>

PASID is shared by all threads in a process. So the logical place to keep
track of it is in the "mm". Both ARM and X86 need to use the PASID in the
"mm".

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
---
v4:
- Change PASID type to u32 (Christoph)

v3:
- Change CONFIG_PCI_PASID to CONFIG_IOMMU_SUPPORT because non-PCI device
  can have PASID in ARM (Jean)

v2:
- This new patch moves "pasid" from x86 specific mm_context_t to generic
  struct mm_struct per Christopher's comment: https://lore.kernel.org/linux-iommu/20200414170252.714402-1-jean-philippe@linaro.org/T/#mb57110ffe1aaa24750eeea4f93b611f0d1913911
- Jean-Philippe Brucker released a virtually same patch. I still put this
  patch in the series for better review. The upstream kernel only needs one
  of the two patches eventually.
https://lore.kernel.org/linux-iommu/20200519175502.2504091-2-jean-philippe@linaro.org/
- Change CONFIG_IOASID to CONFIG_PCI_PASID (Ashok)

 include/linux/mm_types.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 496c3ff97cce..1ff0615ef19f 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -542,6 +542,10 @@ struct mm_struct {
 		atomic_long_t hugetlb_usage;
 #endif
 		struct work_struct async_put_work;
+
+#ifdef CONFIG_IOMMU_SUPPORT
+		u32 pasid;
+#endif
 	} __randomize_layout;
 
 	/*
-- 
2.19.1

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID (diff)
From: Fenghua Yu <fenghua.yu@intel.com>
To: "Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Borislav Petkov" <bp@alien8.de>, "H Peter Anvin" <hpa@zytor.com>,
	"Andy Lutomirski" <luto@kernel.org>,
	"Jean-Philippe Brucker" <jean-philippe@linaro.org>,
	"Christoph Hellwig" <hch@infradead.org>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"David Woodhouse" <dwmw2@infradead.org>,
	"Lu Baolu" <baolu.lu@linux.intel.com>,
	"Dave Hansen" <dave.hansen@intel.com>,
	"Tony Luck" <tony.luck@intel.com>,
	"Ashok Raj" <ashok.raj@intel.com>,
	"Jacob Jun Pan" <jacob.jun.pan@intel.com>,
	"Dave Jiang" <dave.jiang@intel.com>,
	"Sohil Mehta" <sohil.mehta@intel.com>,
	"Ravi V Shankar" <ravi.v.shankar@intel.com>
Cc: "linux-kernel" <linux-kernel@vger.kernel.org>,
	"x86" <x86@kernel.org>,
	iommu@lists.linux-foundation.org,
	Fenghua Yu <fenghua.yu@intel.com>
Subject: [PATCH v7 7/9] mm: Define pasid in mm
Date: Thu, 27 Aug 2020 08:06:32 -0700	[thread overview]
Message-ID: <1598540794-132666-8-git-send-email-fenghua.yu@intel.com> (raw)
In-Reply-To: <1598540794-132666-1-git-send-email-fenghua.yu@intel.com>

PASID is shared by all threads in a process. So the logical place to keep
track of it is in the "mm". Both ARM and X86 need to use the PASID in the
"mm".

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
---
v4:
- Change PASID type to u32 (Christoph)

v3:
- Change CONFIG_PCI_PASID to CONFIG_IOMMU_SUPPORT because non-PCI device
  can have PASID in ARM (Jean)

v2:
- This new patch moves "pasid" from x86 specific mm_context_t to generic
  struct mm_struct per Christopher's comment: https://lore.kernel.org/linux-iommu/20200414170252.714402-1-jean-philippe@linaro.org/T/#mb57110ffe1aaa24750eeea4f93b611f0d1913911
- Jean-Philippe Brucker released a virtually same patch. I still put this
  patch in the series for better review. The upstream kernel only needs one
  of the two patches eventually.
https://lore.kernel.org/linux-iommu/20200519175502.2504091-2-jean-philippe@linaro.org/
- Change CONFIG_IOASID to CONFIG_PCI_PASID (Ashok)

 include/linux/mm_types.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 496c3ff97cce..1ff0615ef19f 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -542,6 +542,10 @@ struct mm_struct {
 		atomic_long_t hugetlb_usage;
 #endif
 		struct work_struct async_put_work;
+
+#ifdef CONFIG_IOMMU_SUPPORT
+		u32 pasid;
+#endif
 	} __randomize_layout;
 
 	/*
-- 
2.19.1


  parent reply	other threads:[~2020-08-27 15:07 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-27 15:06 [PATCH v7 0/9] x86: tag application address space for devices Fenghua Yu
2020-08-27 15:06 ` Fenghua Yu
2020-08-27 15:06 ` [PATCH v7 1/9] iommu: Change type of pasid to u32 Fenghua Yu
2020-08-27 15:06   ` Fenghua Yu
2020-09-04 10:46   ` Borislav Petkov
2020-09-04 10:46     ` Borislav Petkov
2020-09-04 16:06     ` Fenghua Yu
2020-09-04 16:06       ` Fenghua Yu
2020-09-04 19:45       ` Borislav Petkov
2020-09-04 19:45         ` Borislav Petkov
2020-09-04 20:47         ` Fenghua Yu
2020-09-04 20:47           ` Fenghua Yu
2020-09-04 20:53           ` Borislav Petkov
2020-09-04 20:53             ` Borislav Petkov
2020-08-27 15:06 ` [PATCH v7 2/9] iommu/vt-d: Change flags type to unsigned int in binding mm Fenghua Yu
2020-08-27 15:06   ` Fenghua Yu
2020-08-27 15:06 ` [PATCH v7 3/9] docs: x86: Add documentation for SVA (Shared Virtual Addressing) Fenghua Yu
2020-08-27 15:06   ` Fenghua Yu
2020-09-05 15:14   ` Borislav Petkov
2020-09-05 15:14     ` Borislav Petkov
2020-09-05 17:54   ` Randy Dunlap
2020-09-05 17:54     ` Randy Dunlap
2020-09-15  2:02     ` Fenghua Yu
2020-09-15  2:02       ` Fenghua Yu
2020-08-27 15:06 ` [PATCH v7 4/9] x86/cpufeatures: Enumerate ENQCMD and ENQCMDS instructions Fenghua Yu
2020-08-27 15:06   ` Fenghua Yu
2020-08-27 15:06 ` [PATCH v7 5/9] x86/fpu/xstate: Add supervisor PASID state for ENQCMD feature Fenghua Yu
2020-08-27 15:06   ` Fenghua Yu
2020-08-27 15:06 ` [PATCH v7 6/9] x86/msr-index: Define IA32_PASID MSR Fenghua Yu
2020-08-27 15:06   ` Fenghua Yu
2020-08-27 15:06 ` Fenghua Yu [this message]
2020-08-27 15:06   ` [PATCH v7 7/9] mm: Define pasid in mm Fenghua Yu
2020-08-27 15:06 ` [PATCH v7 8/9] x86/cpufeatures: Mark ENQCMD as disabled when configured out Fenghua Yu
2020-08-27 15:06   ` Fenghua Yu
2020-09-07 10:29   ` Borislav Petkov
2020-09-07 10:29     ` Borislav Petkov
2020-08-27 15:06 ` [PATCH v7 9/9] x86/mmu: Allocate/free PASID Fenghua Yu
2020-08-27 15:06   ` Fenghua Yu
2020-09-03 22:34   ` Fenghua Yu
2020-09-03 22:34     ` Fenghua Yu
2020-09-07 11:18   ` Borislav Petkov
2020-09-07 11:18     ` Borislav Petkov
2020-09-14 18:37     ` Fenghua Yu
2020-09-14 18:37       ` Fenghua Yu
2020-09-14 19:25       ` Borislav Petkov
2020-09-14 19:25         ` Borislav Petkov

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