From: Junaid Shahid <junaids@google.com>
To: linux-kernel@vger.kernel.org
Cc: Ofir Weisse <oweisse@google.com>,
kvm@vger.kernel.org, pbonzini@redhat.com, jmattson@google.com,
pjt@google.com, alexandre.chartre@oracle.com,
rppt@linux.ibm.com, dave.hansen@linux.intel.com,
peterz@infradead.org, tglx@linutronix.de, luto@kernel.org,
linux-mm@kvack.org
Subject: [RFC PATCH 37/47] mm: asi: ASI annotation support for static variables.
Date: Tue, 22 Feb 2022 21:22:13 -0800 [thread overview]
Message-ID: <20220223052223.1202152-38-junaids@google.com> (raw)
In-Reply-To: <20220223052223.1202152-1-junaids@google.com>
From: Ofir Weisse <oweisse@google.com>
Added the following annotations:
__asi_not_sensitive: for static variables which are considered not
sensitive.
__asi_not_sensitive_readmostly: similar to __read_mostly, for
non-sensitive static variables.
Signed-off-by: Ofir Weisse <oweisse@google.com>
---
arch/x86/include/asm/asi.h | 12 ++++++++++++
include/asm-generic/asi.h | 6 ++++++
include/asm-generic/vmlinux.lds.h | 18 +++++++++++++++++-
3 files changed, 35 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/asi.h b/arch/x86/include/asm/asi.h
index bdb2f70d4f85..6dd9c7c8a2b8 100644
--- a/arch/x86/include/asm/asi.h
+++ b/arch/x86/include/asm/asi.h
@@ -177,6 +177,18 @@ static inline pgd_t *asi_pgd(struct asi *asi)
return asi->pgd;
}
+/* IMPORTANT: Any modification to the name here should also be applied to
+ * include/asm-generic/vmlinux.lds.h */
+#define ASI_NON_SENSITIVE_SECTION_NAME ".data..asi_non_sensitive"
+#define ASI_NON_SENSITIVE_READ_MOSTLY_SECTION_NAME \
+ ".data..asi_non_sensitive_readmostly"
+
+#define __asi_not_sensitive \
+ __section(ASI_NON_SENSITIVE_SECTION_NAME)
+
+#define __asi_not_sensitive_readmostly \
+ __section(ASI_NON_SENSITIVE_READ_MOSTLY_SECTION_NAME)
+
#else /* CONFIG_ADDRESS_SPACE_ISOLATION */
static inline void asi_intr_enter(void) { }
diff --git a/include/asm-generic/asi.h b/include/asm-generic/asi.h
index fffb323d2a00..d9082267a5dd 100644
--- a/include/asm-generic/asi.h
+++ b/include/asm-generic/asi.h
@@ -121,6 +121,12 @@ void asi_flush_tlb_range(struct asi *asi, void *addr, size_t len) { }
#define static_asi_enabled() false
+/* IMPORTANT: Any modification to the name here should also be applied to
+ * include/asm-generic/vmlinux.lds.h */
+
+#define __asi_not_sensitive
+#define __asi_not_sensitive_readmostly
+
#endif /* !_ASSEMBLY_ */
#endif /* !CONFIG_ADDRESS_SPACE_ISOLATION */
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 42f3866bca69..c769d939c15f 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -374,10 +374,26 @@
. = ALIGN(PAGE_SIZE); \
__nosave_end = .;
+#ifdef CONFIG_ADDRESS_SPACE_ISOLATION
+#define ASI_NOT_SENSITIVE_DATA(page_align) \
+ . = ALIGN(page_align); \
+ __start_asi_nonsensitive = .; \
+ *(.data..asi_non_sensitive) \
+ . = ALIGN(page_align); \
+ __end_asi_nonsensitive = .; \
+ __start_asi_nonsensitive_readmostly = .; \
+ *(.data..asi_non_sensitive_readmostly) \
+ . = ALIGN(page_align); \
+ __end_asi_nonsensitive_readmostly = .;
+#else
+#define ASI_NOT_SENSITIVE_DATA
+#endif
+
#define PAGE_ALIGNED_DATA(page_align) \
. = ALIGN(page_align); \
*(.data..page_aligned) \
- . = ALIGN(page_align);
+ . = ALIGN(page_align); \
+ ASI_NOT_SENSITIVE_DATA(page_align)
#define READ_MOSTLY_DATA(align) \
. = ALIGN(align); \
--
2.35.1.473.g83b2b277ed-goog
next prev parent reply other threads:[~2022-02-23 5:25 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-23 5:21 [RFC PATCH 00/47] Address Space Isolation for KVM Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 01/47] mm: asi: Introduce ASI core API Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 02/47] mm: asi: Add command-line parameter to enable/disable ASI Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 03/47] mm: asi: Switch to unrestricted address space when entering scheduler Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 04/47] mm: asi: ASI support in interrupts/exceptions Junaid Shahid
2022-03-14 15:50 ` Thomas Gleixner
2022-03-15 2:01 ` Junaid Shahid
2022-03-15 12:55 ` Thomas Gleixner
2022-03-15 22:41 ` Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 05/47] mm: asi: Make __get_current_cr3_fast() ASI-aware Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 06/47] mm: asi: ASI page table allocation and free functions Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 07/47] mm: asi: Functions to map/unmap a memory range into ASI page tables Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 08/47] mm: asi: Add basic infrastructure for global non-sensitive mappings Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 09/47] mm: Add __PAGEFLAG_FALSE Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 10/47] mm: asi: Support for global non-sensitive direct map allocations Junaid Shahid
2022-03-23 21:06 ` Matthew Wilcox
2022-03-23 23:48 ` Junaid Shahid
2022-03-24 1:54 ` Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 11/47] mm: asi: Global non-sensitive vmalloc/vmap support Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 12/47] mm: asi: Support for global non-sensitive slab caches Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 13/47] asi: Added ASI memory cgroup flag Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 14/47] mm: asi: Disable ASI API when ASI is not enabled for a process Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 15/47] kvm: asi: Restricted address space for VM execution Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 16/47] mm: asi: Support for mapping non-sensitive pcpu chunks Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 17/47] mm: asi: Aliased direct map for local non-sensitive allocations Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 18/47] mm: asi: Support for pre-ASI-init " Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 19/47] mm: asi: Support for locally nonsensitive page allocations Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 20/47] mm: asi: Support for locally non-sensitive vmalloc allocations Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 21/47] mm: asi: Add support for locally non-sensitive VM_USERMAP pages Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 22/47] mm: asi: Added refcounting when initilizing an asi Junaid Shahid
2022-02-23 5:21 ` [RFC PATCH 23/47] mm: asi: Add support for mapping all userspace memory into ASI Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 24/47] mm: asi: Support for local non-sensitive slab caches Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 25/47] mm: asi: Avoid warning from NMI userspace accesses in ASI context Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 26/47] mm: asi: Use separate PCIDs for restricted address spaces Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 27/47] mm: asi: Avoid TLB flushes during ASI CR3 switches when possible Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 28/47] mm: asi: Avoid TLB flush IPIs to CPUs not in ASI context Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 29/47] mm: asi: Reduce TLB flushes when freeing pages asynchronously Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 30/47] mm: asi: Add API for mapping userspace address ranges Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 31/47] mm: asi: Support for non-sensitive SLUB caches Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 32/47] x86: asi: Allocate FPU state separately when ASI is enabled Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 33/47] kvm: asi: Map guest memory into restricted ASI address space Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 34/47] kvm: asi: Unmap guest memory from ASI address space when using nested virt Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 35/47] mm: asi: asi_exit() on PF, skip handling if address is accessible Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 36/47] mm: asi: Adding support for dynamic percpu ASI allocations Junaid Shahid
2022-02-23 5:22 ` Junaid Shahid [this message]
2022-02-23 5:22 ` [RFC PATCH 38/47] mm: asi: ASI annotation support for dynamic modules Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 39/47] mm: asi: Skip conventional L1TF/MDS mitigations Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 40/47] mm: asi: support for static percpu DEFINE_PER_CPU*_ASI Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 41/47] mm: asi: Annotation of static variables to be nonsensitive Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 42/47] mm: asi: Annotation of PERCPU " Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 43/47] mm: asi: Annotation of dynamic " Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 44/47] kvm: asi: Splitting kvm_vcpu_arch into non/sensitive parts Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 45/47] mm: asi: Mapping global nonsensitive areas in asi_global_init Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 46/47] kvm: asi: Do asi_exit() in vcpu_run loop before returning to userspace Junaid Shahid
2022-02-23 5:22 ` [RFC PATCH 47/47] mm: asi: Properly un/mapping task stack from ASI + tlb flush Junaid Shahid
2022-03-05 3:39 ` [RFC PATCH 00/47] Address Space Isolation for KVM Hyeonggon Yoo
2022-03-16 21:34 ` Alexandre Chartre
2022-03-17 23:25 ` Junaid Shahid
2022-03-22 9:46 ` Alexandre Chartre
2022-03-23 19:35 ` Junaid Shahid
2022-04-08 8:52 ` Alexandre Chartre
2022-04-11 3:26 ` junaid_shahid
2022-03-16 22:49 ` Thomas Gleixner
2022-03-17 21:24 ` Junaid Shahid
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