From: Ackerley Tng <ackerleytng@google.com>
To: aik@amd.com, andrew.jones@linux.dev, binbin.wu@linux.intel.com,
brauner@kernel.org, chao.p.peng@linux.intel.com,
david@kernel.org, ira.weiny@intel.com, jmattson@google.com,
jroedel@suse.de, jthoughton@google.com, michael.roth@amd.com,
oupton@kernel.org, pankaj.gupta@amd.com, qperret@google.com,
rick.p.edgecombe@intel.com, rientjes@google.com,
shivankg@amd.com, steven.price@arm.com, tabba@google.com,
willy@infradead.org, wyihan@google.com, yan.y.zhao@intel.com,
forkloop@google.com, pratyush@kernel.org,
suzuki.poulose@arm.com, aneesh.kumar@kernel.org,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Shuah Khan <shuah@kernel.org>,
Vishal Annapurve <vannapurve@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Chris Li <chrisl@kernel.org>, Kairui Song <kasong@tencent.com>,
Kemeng Shi <shikemeng@huaweicloud.com>,
Nhat Pham <nphamcs@gmail.com>, Baoquan He <bhe@redhat.com>,
Barry Song <baohua@kernel.org>,
Axel Rasmussen <axelrasmussen@google.com>,
Yuanchu Xie <yuanchu@google.com>, Wei Xu <weixugc@google.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
Vlastimil Babka <vbabka@kernel.org>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-mm@kvack.org,
Ackerley Tng <ackerleytng@google.com>
Subject: [PATCH RFC v4 02/44] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES
Date: Thu, 26 Mar 2026 15:24:11 -0700 [thread overview]
Message-ID: <20260326-gmem-inplace-conversion-v4-2-e202fe950ffd@google.com> (raw)
In-Reply-To: <20260326-gmem-inplace-conversion-v4-0-e202fe950ffd@google.com>
From: Sean Christopherson <seanjc@google.com>
Rename the per-VM memory attributes Kconfig to make it explicitly about
per-VM attributes in anticipation of adding memory attributes support to
guest_memfd, at which point it will be possible (and desirable) to have
memory attributes without the per-VM support, even in x86.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/Kconfig | 6 +++---
arch/x86/kvm/mmu/mmu.c | 2 +-
arch/x86/kvm/x86.c | 2 +-
include/linux/kvm_host.h | 8 ++++----
include/trace/events/kvm.h | 4 ++--
virt/kvm/Kconfig | 2 +-
virt/kvm/kvm_main.c | 14 +++++++-------
8 files changed, 20 insertions(+), 20 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 6e4e3ef9b8c72..cf3d2bdababc7 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -2329,7 +2329,7 @@ void kvm_configure_mmu(bool enable_tdp, int tdp_forced_root_level,
int tdp_max_root_level, int tdp_huge_page_level);
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
#define kvm_arch_has_private_mem(kvm) ((kvm)->arch.has_private_mem)
#endif
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 801bf9e520db3..26f6afd51bbdc 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -84,7 +84,7 @@ config KVM_SW_PROTECTED_VM
bool "Enable support for KVM software-protected VMs"
depends on EXPERT
depends on KVM_X86 && X86_64
- select KVM_GENERIC_MEMORY_ATTRIBUTES
+ select KVM_VM_MEMORY_ATTRIBUTES
help
Enable support for KVM software-protected VMs. Currently, software-
protected VMs are purely a development and testing vehicle for
@@ -135,7 +135,7 @@ config KVM_INTEL_TDX
bool "Intel Trust Domain Extensions (TDX) support"
default y
depends on INTEL_TDX_HOST
- select KVM_GENERIC_MEMORY_ATTRIBUTES
+ select KVM_VM_MEMORY_ATTRIBUTES
select HAVE_KVM_ARCH_GMEM_POPULATE
help
Provides support for launching Intel Trust Domain Extensions (TDX)
@@ -159,7 +159,7 @@ config KVM_AMD_SEV
depends on KVM_AMD && X86_64
depends on CRYPTO_DEV_SP_PSP && !(KVM_AMD=y && CRYPTO_DEV_CCP_DD=m)
select ARCH_HAS_CC_PLATFORM
- select KVM_GENERIC_MEMORY_ATTRIBUTES
+ select KVM_VM_MEMORY_ATTRIBUTES
select HAVE_KVM_ARCH_GMEM_PREPARE
select HAVE_KVM_ARCH_GMEM_INVALIDATE
select HAVE_KVM_ARCH_GMEM_POPULATE
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index b922a8b000577..792701b093234 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -7889,7 +7889,7 @@ void kvm_mmu_pre_destroy_vm(struct kvm *kvm)
vhost_task_stop(kvm->arch.nx_huge_page_recovery_thread);
}
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
static bool hugepage_test_mixed(struct kvm_memory_slot *slot, gfn_t gfn,
int level)
{
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index fd1c4a36b5936..7e133a9da11f0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -13509,7 +13509,7 @@ static int kvm_alloc_memslot_metadata(struct kvm *kvm,
}
}
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
kvm_mmu_init_memslot_memory_attributes(kvm, slot);
#endif
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 6b76e7a6f4c22..e75f7295af5d0 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -721,7 +721,7 @@ static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
}
#endif
-#ifndef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifndef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
static inline bool kvm_arch_has_private_mem(struct kvm *kvm)
{
return false;
@@ -870,7 +870,7 @@ struct kvm {
#ifdef CONFIG_HAVE_KVM_PM_NOTIFIER
struct notifier_block pm_notifier;
#endif
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
/* Protected by slots_lock (for writes) and RCU (for reads) */
struct xarray mem_attr_array;
#endif
@@ -2513,7 +2513,7 @@ static inline bool kvm_memslot_is_gmem_only(const struct kvm_memory_slot *slot)
return slot->flags & KVM_MEMSLOT_GMEM_ONLY;
}
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
static inline unsigned long kvm_get_memory_attributes(struct kvm *kvm, gfn_t gfn)
{
return xa_to_value(xa_load(&kvm->mem_attr_array, gfn));
@@ -2535,7 +2535,7 @@ static inline bool kvm_mem_is_private(struct kvm *kvm, gfn_t gfn)
{
return false;
}
-#endif /* CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES */
+#endif /* CONFIG_KVM_VM_MEMORY_ATTRIBUTES */
#ifdef CONFIG_KVM_GUEST_MEMFD
int kvm_gmem_get_pfn(struct kvm *kvm, struct kvm_memory_slot *slot,
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index b282e3a867696..1ba72bd73ea2f 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h
@@ -358,7 +358,7 @@ TRACE_EVENT(kvm_dirty_ring_exit,
TP_printk("vcpu %d", __entry->vcpu_id)
);
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
/*
* @start: Starting address of guest memory range
* @end: End address of guest memory range
@@ -383,7 +383,7 @@ TRACE_EVENT(kvm_vm_set_mem_attributes,
TP_printk("%#016llx -- %#016llx [0x%lx]",
__entry->start, __entry->end, __entry->attr)
);
-#endif /* CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES */
+#endif /* CONFIG_KVM_VM_MEMORY_ATTRIBUTES */
TRACE_EVENT(kvm_unmap_hva_range,
TP_PROTO(unsigned long start, unsigned long end),
diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index 794976b88c6f9..5119cb37145fc 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -100,7 +100,7 @@ config KVM_ELIDE_TLB_FLUSH_IF_YOUNG
config KVM_MMU_LOCKLESS_AGING
bool
-config KVM_GENERIC_MEMORY_ATTRIBUTES
+config KVM_VM_MEMORY_ATTRIBUTES
bool
config KVM_GUEST_MEMFD
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 9093251beb398..301d7ddac6ba6 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1122,7 +1122,7 @@ static struct kvm *kvm_create_vm(unsigned long type, const char *fdname)
spin_lock_init(&kvm->mn_invalidate_lock);
rcuwait_init(&kvm->mn_memslots_update_rcuwait);
xa_init(&kvm->vcpu_array);
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
xa_init(&kvm->mem_attr_array);
#endif
@@ -1307,7 +1307,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
cleanup_srcu_struct(&kvm->irq_srcu);
srcu_barrier(&kvm->srcu);
cleanup_srcu_struct(&kvm->srcu);
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
xa_destroy(&kvm->mem_attr_array);
#endif
kvm_arch_free_vm(kvm);
@@ -2425,7 +2425,7 @@ static int kvm_vm_ioctl_clear_dirty_log(struct kvm *kvm,
}
#endif /* CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT */
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
static u64 kvm_supported_mem_attributes(struct kvm *kvm)
{
if (!kvm || kvm_arch_has_private_mem(kvm))
@@ -2630,7 +2630,7 @@ static int kvm_vm_ioctl_set_mem_attributes(struct kvm *kvm,
return kvm_vm_set_mem_attributes(kvm, start, end, attrs->attributes);
}
-#endif /* CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES */
+#endif /* CONFIG_KVM_VM_MEMORY_ATTRIBUTES */
struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
{
@@ -4928,7 +4928,7 @@ static int kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
case KVM_CAP_SYSTEM_EVENT_DATA:
case KVM_CAP_DEVICE_CTRL:
return 1;
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
case KVM_CAP_MEMORY_ATTRIBUTES:
return kvm_supported_mem_attributes(kvm);
#endif
@@ -5332,7 +5332,7 @@ static long kvm_vm_ioctl(struct file *filp,
break;
}
#endif /* CONFIG_HAVE_KVM_IRQ_ROUTING */
-#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
+#ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
case KVM_SET_MEMORY_ATTRIBUTES: {
struct kvm_memory_attributes attrs;
@@ -5343,7 +5343,7 @@ static long kvm_vm_ioctl(struct file *filp,
r = kvm_vm_ioctl_set_mem_attributes(kvm, &attrs);
break;
}
-#endif /* CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES */
+#endif /* CONFIG_KVM_VM_MEMORY_ATTRIBUTES */
case KVM_CREATE_DEVICE: {
struct kvm_create_device cd;
--
2.53.0.1018.g2bb0e51243-goog
next prev parent reply other threads:[~2026-03-26 22:24 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-26 22:24 [PATCH RFC v4 00/44] guest_memfd: In-place conversion support Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 01/44] KVM: guest_memfd: Introduce per-gmem attributes, use to guard user mappings Ackerley Tng
2026-03-26 22:24 ` Ackerley Tng [this message]
2026-03-26 22:24 ` [PATCH RFC v4 03/44] KVM: Enumerate support for PRIVATE memory iff kvm_arch_has_private_mem is defined Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 04/44] KVM: Stub in ability to disable per-VM memory attribute tracking Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 05/44] KVM: guest_memfd: Wire up kvm_get_memory_attributes() to per-gmem attributes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 06/44] KVM: guest_memfd: Update kvm_gmem_populate() to use gmem attributes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 07/44] KVM: guest_memfd: Only prepare folios for private pages Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 08/44] KVM: Introduce KVM_SET_MEMORY_ATTRIBUTES2 Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 09/44] KVM: guest_memfd: Enable INIT_SHARED on guest_memfd for x86 Coco VMs Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 10/44] KVM: guest_memfd: Add support for KVM_SET_MEMORY_ATTRIBUTES2 Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 11/44] KVM: guest_memfd: Handle lru_add fbatch refcounts during conversion safety check Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 12/44] KVM: guest_memfd: Introduce default handlers for content modes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 13/44] KVM: guest_memfd: Apply content modes while setting memory attributes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 14/44] KVM: x86: Add support for applying content modes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 15/44] KVM: Add CAP to enumerate supported SET_MEMORY_ATTRIBUTES2 flags Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 16/44] KVM: Move KVM_VM_MEMORY_ATTRIBUTES config definition to x86 Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 17/44] KVM: Let userspace disable per-VM mem attributes, enable per-gmem attributes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 18/44] KVM: selftests: Create gmem fd before "regular" fd when adding memslot Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 19/44] KVM: selftests: Rename guest_memfd{,_offset} to gmem_{fd,offset} Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 20/44] KVM: selftests: Add support for mmap() on guest_memfd in core library Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 21/44] KVM: selftests: Add selftests global for guest memory attributes capability Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 22/44] KVM: selftests: Update framework to use KVM_SET_MEMORY_ATTRIBUTES2 Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 23/44] KVM: selftests: Add helpers for calling ioctls on guest_memfd Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 24/44] KVM: selftests: Test using guest_memfd for guest private memory Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 25/44] KVM: selftests: Test basic single-page conversion flow Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 26/44] KVM: selftests: Test conversion flow when INIT_SHARED Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 27/44] KVM: selftests: Test conversion precision in guest_memfd Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 28/44] KVM: selftests: Test conversion before allocation Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 29/44] KVM: selftests: Convert with allocated folios in different layouts Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 30/44] KVM: selftests: Test that truncation does not change shared/private status Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 31/44] KVM: selftests: Test that shared/private status is consistent across processes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 32/44] KVM: selftests: Test conversion with elevated page refcount Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 33/44] KVM: selftests: Test that conversion to private does not support ZERO Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 34/44] KVM: selftests: Support checking that data not equal expected Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 35/44] KVM: selftests: Test that not specifying a conversion flag scrambles memory contents Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 36/44] KVM: selftests: Reset shared memory after hole-punching Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 37/44] KVM: selftests: Provide function to look up guest_memfd details from gpa Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 38/44] KVM: selftests: Provide common function to set memory attributes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 39/44] KVM: selftests: Check fd/flags provided to mmap() when setting up memslot Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 40/44] KVM: selftests: Make TEST_EXPECT_SIGBUS thread-safe Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 41/44] KVM: selftests: Update private_mem_conversions_test to mmap() guest_memfd Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 42/44] KVM: selftests: Add script to exercise private_mem_conversions_test Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 43/44] KVM: selftests: Update pre-fault test to work with per-guest_memfd attributes Ackerley Tng
2026-03-26 22:24 ` [PATCH RFC v4 44/44] KVM: selftests: Update private memory exits test to work with per-gmem attributes Ackerley Tng
2026-03-26 23:36 ` [POC PATCH 0/6] guest_memfd in-place conversion selftests for SNP Ackerley Tng
2026-03-26 23:36 ` [POC PATCH 1/6] KVM: selftests: Initialize guest_memfd with INIT_SHARED Ackerley Tng
2026-03-26 23:36 ` [POC PATCH 2/6] KVM: selftests: Call snp_launch_update_data() providing copy of memory Ackerley Tng
2026-03-26 23:36 ` [POC PATCH 3/6] KVM: selftests: Make guest_code_xsave more friendly Ackerley Tng
2026-03-26 23:36 ` [POC PATCH 4/6] KVM: selftests: Allow specifying CoCo-privateness while mapping a page Ackerley Tng
2026-03-26 23:36 ` [POC PATCH 5/6] KVM: selftests: Test conversions for SNP Ackerley Tng
2026-03-26 23:36 ` [POC PATCH 6/6] KVM: selftests: Test content modes ZERO and PRESERVE " Ackerley Tng
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