From: Fenghua Yu <fenghua.yu@intel.com> To: "Thomas Gleixner" <tglx@linutronix.de>, "Joerg Roedel" <joro@8bytes.org>, "Ingo Molnar" <mingo@redhat.com>, "Borislav Petkov" <bp@alien8.de>, "Peter Zijlstra" <peterz@infradead.org>, "H Peter Anvin" <hpa@zytor.com>, "David Woodhouse" <dwmw2@infradead.org>, "Lu Baolu" <baolu.lu@linux.intel.com>, "Dave Hansen" <dave.hansen@intel.com>, "Tony Luck" <tony.luck@intel.com>, "Jean-Philippe Brucker" <jean-philippe@linaro.org>, "Christoph Hellwig" <hch@infradeed.org>, "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 v4 11/12] sched: Define and initialize a flag to identify valid PASID in the task Date: Thu, 25 Jun 2020 13:17:21 -0700 [thread overview] Message-ID: <1593116242-31507-12-git-send-email-fenghua.yu@intel.com> (raw) In-Reply-To: <1593116242-31507-1-git-send-email-fenghua.yu@intel.com> From: Peter Zijlstra <peterz@infradead.org> The flag is defined for the task to identify if the task has a valid PASID. Its initial value is 0 when the task is forked/cloned. It will be used shortly. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Co-developed-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> --- v2: - Add this patch to define the flag to identify valid PASID MSR (PeterZ) include/linux/sched.h | 3 +++ kernel/fork.c | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/include/linux/sched.h b/include/linux/sched.h index b62e6aaf28f0..1b5a6e5c74ca 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -801,6 +801,9 @@ struct task_struct { /* Stalled due to lack of memory */ unsigned in_memstall:1; #endif +#ifdef CONFIG_IOMMU_SUPPORT + unsigned has_valid_pasid:1; +#endif unsigned long atomic_flags; /* Flags requiring atomic access. */ diff --git a/kernel/fork.c b/kernel/fork.c index 43b5f112604d..0a962bebdf88 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -955,6 +955,10 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) tsk->use_memdelay = 0; #endif +#ifdef CONFIG_IOMMU_SUPPORT + tsk->has_valid_pasid = 0; +#endif + #ifdef CONFIG_MEMCG tsk->active_memcg = NULL; #endif -- 2.19.1
WARNING: multiple messages have this Message-ID (diff)
From: Fenghua Yu <fenghua.yu@intel.com> To: "Thomas Gleixner" <tglx@linutronix.de>, "Joerg Roedel" <joro@8bytes.org>, "Ingo Molnar" <mingo@redhat.com>, "Borislav Petkov" <bp@alien8.de>, "Peter Zijlstra" <peterz@infradead.org>, "H Peter Anvin" <hpa@zytor.com>, "David Woodhouse" <dwmw2@infradead.org>, "Lu Baolu" <baolu.lu@linux.intel.com>, "Dave Hansen" <dave.hansen@intel.com>, "Tony Luck" <tony.luck@intel.com>, "Jean-Philippe Brucker" <jean-philippe@linaro.org>, "Christoph Hellwig" <hch@infradeed.org>, "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 v4 11/12] sched: Define and initialize a flag to identify valid PASID in the task Date: Thu, 25 Jun 2020 13:17:21 -0700 [thread overview] Message-ID: <1593116242-31507-12-git-send-email-fenghua.yu@intel.com> (raw) In-Reply-To: <1593116242-31507-1-git-send-email-fenghua.yu@intel.com> From: Peter Zijlstra <peterz@infradead.org> The flag is defined for the task to identify if the task has a valid PASID. Its initial value is 0 when the task is forked/cloned. It will be used shortly. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Co-developed-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> --- v2: - Add this patch to define the flag to identify valid PASID MSR (PeterZ) include/linux/sched.h | 3 +++ kernel/fork.c | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/include/linux/sched.h b/include/linux/sched.h index b62e6aaf28f0..1b5a6e5c74ca 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -801,6 +801,9 @@ struct task_struct { /* Stalled due to lack of memory */ unsigned in_memstall:1; #endif +#ifdef CONFIG_IOMMU_SUPPORT + unsigned has_valid_pasid:1; +#endif unsigned long atomic_flags; /* Flags requiring atomic access. */ diff --git a/kernel/fork.c b/kernel/fork.c index 43b5f112604d..0a962bebdf88 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -955,6 +955,10 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) tsk->use_memdelay = 0; #endif +#ifdef CONFIG_IOMMU_SUPPORT + tsk->has_valid_pasid = 0; +#endif + #ifdef CONFIG_MEMCG tsk->active_memcg = NULL; #endif -- 2.19.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-06-25 20:18 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-25 20:17 [PATCH v4 00/12] x86: tag application address space for devices Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 01/12] iommu: Change type of pasid to u32 Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-26 1:13 ` Lu Baolu 2020-06-26 1:13 ` Lu Baolu 2020-06-25 20:17 ` [PATCH v4 02/12] iommu/vt-d: Change flags type to unsigned int in binding mm Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-26 1:14 ` Lu Baolu 2020-06-26 1:14 ` Lu Baolu 2020-06-25 20:17 ` [PATCH v4 03/12] docs: x86: Add documentation for SVA (Shared Virtual Addressing) Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 04/12] x86/cpufeatures: Enumerate ENQCMD and ENQCMDS instructions Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 05/12] x86/fpu/xstate: Add supervisor PASID state for ENQCMD feature Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 06/12] x86/msr-index: Define IA32_PASID MSR Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 07/12] mm: Define pasid in mm Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 08/12] fork: Clear PASID for new mm Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 09/12] x86/process: Clear PASID state for a newly forked/cloned thread Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 10/12] x86/mmu: Allocate/free PASID Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-26 1:42 ` Lu Baolu 2020-06-26 1:42 ` Lu Baolu 2020-06-25 20:17 ` Fenghua Yu [this message] 2020-06-25 20:17 ` [PATCH v4 11/12] sched: Define and initialize a flag to identify valid PASID in the task Fenghua Yu 2020-06-25 20:17 ` [PATCH v4 12/12] x86/traps: Fix up invalid PASID Fenghua Yu 2020-06-25 20:17 ` Fenghua Yu 2020-06-26 1:46 ` Lu Baolu 2020-06-26 1:46 ` Lu Baolu 2020-06-26 9:44 ` Peter Zijlstra 2020-06-26 9:44 ` Peter Zijlstra 2020-06-26 18:10 ` Luck, Tony 2020-06-26 18:10 ` Luck, Tony 2020-06-26 18:15 ` Borislav Petkov 2020-06-26 18:15 ` Borislav Petkov 2020-06-26 18:23 ` Dave Hansen 2020-06-26 18:23 ` Dave Hansen 2020-06-26 18:35 ` Fenghua Yu 2020-06-26 18:35 ` Fenghua Yu 2020-06-26 18:16 ` Fenghua Yu 2020-06-26 18:16 ` Fenghua Yu
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