From: Kristen Carlson Accardi <kristen@linux.intel.com>
To: jarkko@kernel.org, dave.hansen@linux.intel.com, tj@kernel.org,
linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org,
cgroups@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Cc: zhiquan1.li@intel.com,
Kristen Carlson Accardi <kristen@linux.intel.com>,
Sean Christopherson <seanjc@google.com>
Subject: [PATCH v2 03/18] x86/sgx: Add 'struct sgx_epc_lru_lists' to encapsulate lru list(s)
Date: Fri, 2 Dec 2022 10:36:39 -0800 [thread overview]
Message-ID: <20221202183655.3767674-4-kristen@linux.intel.com> (raw)
In-Reply-To: <20221202183655.3767674-1-kristen@linux.intel.com>
Introduce a data structure to wrap the existing reclaimable list
and its spinlock in a struct to minimize the code changes needed
to handle multiple LRUs as well as reclaimable and non-reclaimable
lists, both of which will be introduced and used by SGX EPC cgroups.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Cc: Sean Christopherson <seanjc@google.com>
---
arch/x86/kernel/cpu/sgx/sgx.h | 65 +++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h
index 39cb15a8abcb..5e6d88438fae 100644
--- a/arch/x86/kernel/cpu/sgx/sgx.h
+++ b/arch/x86/kernel/cpu/sgx/sgx.h
@@ -90,6 +90,71 @@ static inline void *sgx_get_epc_virt_addr(struct sgx_epc_page *page)
return section->virt_addr + index * PAGE_SIZE;
}
+/*
+ * This data structure wraps a list of reclaimable EPC pages, and a list of
+ * non-reclaimable EPC pages and is used to implement a LRU policy during
+ * reclamation.
+ */
+struct sgx_epc_lru_lists {
+ spinlock_t lock;
+ struct list_head reclaimable;
+ struct list_head unreclaimable;
+};
+
+static inline void sgx_lru_init(struct sgx_epc_lru_lists *lrus)
+{
+ spin_lock_init(&lrus->lock);
+ INIT_LIST_HEAD(&lrus->reclaimable);
+ INIT_LIST_HEAD(&lrus->unreclaimable);
+}
+
+/*
+ * Must be called with queue lock acquired
+ */
+static inline void __sgx_epc_page_list_push(struct list_head *list, struct sgx_epc_page *page)
+{
+ list_add_tail(&page->list, list);
+}
+
+/*
+ * Must be called with queue lock acquired
+ */
+static inline struct sgx_epc_page * __sgx_epc_page_list_pop(struct list_head *list)
+{
+ struct sgx_epc_page *epc_page;
+
+ if (list_empty(list))
+ return NULL;
+
+ epc_page = list_first_entry(list, struct sgx_epc_page, list);
+ list_del_init(&epc_page->list);
+ return epc_page;
+}
+
+static inline struct sgx_epc_page *
+sgx_epc_pop_reclaimable(struct sgx_epc_lru_lists *lrus)
+{
+ return __sgx_epc_page_list_pop(&(lrus)->reclaimable);
+}
+
+static inline void sgx_epc_push_reclaimable(struct sgx_epc_lru_lists *lrus,
+ struct sgx_epc_page *page)
+{
+ __sgx_epc_page_list_push(&(lrus)->reclaimable, page);
+}
+
+static inline struct sgx_epc_page *
+sgx_epc_pop_unreclaimable(struct sgx_epc_lru_lists *lrus)
+{
+ return __sgx_epc_page_list_pop(&(lrus)->unreclaimable);
+}
+
+static inline void sgx_epc_push_unreclaimable(struct sgx_epc_lru_lists *lrus,
+ struct sgx_epc_page *page)
+{
+ __sgx_epc_page_list_push(&(lrus)->unreclaimable, page);
+}
+
struct sgx_epc_page *__sgx_alloc_epc_page(void);
void sgx_free_epc_page(struct sgx_epc_page *page);
--
2.38.1
next prev parent reply other threads:[~2022-12-02 18:37 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-02 18:36 [PATCH v2 00/18] Add Cgroup support for SGX EPC memory Kristen Carlson Accardi
2022-12-02 18:36 ` [PATCH v2 01/18] x86/sgx: Call cond_resched() at the end of sgx_reclaim_pages() Kristen Carlson Accardi
2022-12-02 21:33 ` Dave Hansen
2022-12-02 21:37 ` Kristen Carlson Accardi
2022-12-02 21:45 ` Dave Hansen
2022-12-02 22:17 ` Kristen Carlson Accardi
2022-12-02 22:37 ` Dave Hansen
2022-12-02 18:36 ` [PATCH v2 02/18] x86/sgx: Store struct sgx_encl when allocating new VA pages Kristen Carlson Accardi
2022-12-02 21:35 ` Dave Hansen
2022-12-02 21:40 ` Kristen Carlson Accardi
2022-12-02 21:48 ` Dave Hansen
2022-12-02 22:35 ` Sean Christopherson
2022-12-02 22:47 ` Dave Hansen
2022-12-02 22:49 ` Sean Christopherson
2022-12-02 18:36 ` Kristen Carlson Accardi [this message]
2022-12-02 21:39 ` [PATCH v2 03/18] x86/sgx: Add 'struct sgx_epc_lru_lists' to encapsulate lru list(s) Dave Hansen
2022-12-08 15:31 ` Jarkko Sakkinen
2022-12-08 18:03 ` Kristen Carlson Accardi
2022-12-02 18:36 ` [PATCH v2 04/18] x86/sgx: Use sgx_epc_lru_lists for existing active page list Kristen Carlson Accardi
2022-12-02 21:43 ` Dave Hansen
2022-12-02 21:51 ` Kristen Carlson Accardi
2022-12-02 22:10 ` Dave Hansen
2022-12-02 18:36 ` [PATCH v2 05/18] x86/sgx: Track epc pages on reclaimable or unreclaimable lists Kristen Carlson Accardi
2022-12-02 22:13 ` Dave Hansen
2022-12-02 22:28 ` Sean Christopherson
2022-12-02 18:36 ` [PATCH v2 06/18] x86/sgx: Introduce RECLAIM_IN_PROGRESS flag for EPC pages Kristen Carlson Accardi
2022-12-02 22:15 ` Dave Hansen
2022-12-08 15:46 ` Jarkko Sakkinen
2022-12-08 18:13 ` Kristen Carlson Accardi
2022-12-02 18:36 ` [PATCH v2 07/18] x86/sgx: Use a list to track to-be-reclaimed pages during reclaim Kristen Carlson Accardi
2022-12-02 22:33 ` Dave Hansen
2022-12-05 16:33 ` Kristen Carlson Accardi
2022-12-05 17:03 ` Dave Hansen
2022-12-05 18:25 ` Kristen Carlson Accardi
2022-12-02 18:36 ` [PATCH v2 08/18] x86/sgx: Allow reclaiming up to 32 pages, but scan 16 by default Kristen Carlson Accardi
2022-12-08 9:26 ` Jarkko Sakkinen
2022-12-08 9:27 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 09/18] x86/sgx: Return the number of EPC pages that were successfully reclaimed Kristen Carlson Accardi
2022-12-08 9:30 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 10/18] x86/sgx: Add option to ignore age of page during EPC reclaim Kristen Carlson Accardi
2022-12-08 9:37 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 11/18] x86/sgx: Prepare for multiple LRUs Kristen Carlson Accardi
2022-12-08 9:42 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 12/18] x86/sgx: Expose sgx_reclaim_pages() for use by EPC cgroup Kristen Carlson Accardi
2022-12-08 9:46 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 13/18] x86/sgx: Add helper to grab pages from an arbitrary EPC LRU Kristen Carlson Accardi
2022-12-08 9:56 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 14/18] x86/sgx: Add EPC OOM path to forcefully reclaim EPC Kristen Carlson Accardi
2022-12-08 15:21 ` Jarkko Sakkinen
2022-12-09 16:05 ` Kristen Carlson Accardi
2022-12-09 16:22 ` Dave Hansen
2022-12-12 18:09 ` Sean Christopherson
2022-12-26 20:43 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 15/18] cgroup/misc: Add per resource callbacks for css events Kristen Carlson Accardi
2022-12-08 14:53 ` Jarkko Sakkinen
2022-12-08 15:15 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 16/18] cgroup/misc: Prepare for SGX usage Kristen Carlson Accardi
2022-12-08 15:23 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 17/18] x86/sgx: Add support for misc cgroup controller Kristen Carlson Accardi
2022-12-08 15:30 ` Jarkko Sakkinen
2022-12-02 18:36 ` [PATCH v2 18/18] Docs/x86/sgx: Add description for cgroup support Kristen Carlson Accardi
2023-04-03 21:26 ` [EXTERNAL] [PATCH v2 00/18] Add Cgroup support for SGX EPC memory Anand Krishnamoorthi
2023-04-13 18:49 ` Anand Krishnamoorthi
2023-04-18 16:44 ` Mikko Ylinen
2023-04-27 16:53 ` Anand Krishnamoorthi
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