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charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260507-gmem-inplace-conversion-v6-26-91ab5a8b19a4@google.com> References: <20260507-gmem-inplace-conversion-v6-0-91ab5a8b19a4@google.com> In-Reply-To: <20260507-gmem-inplace-conversion-v6-0-91ab5a8b19a4@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, 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, liam@infradead.org, Paolo Bonzini , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Shuah Khan , Shuah Khan , Vishal Annapurve , Andrew Morton , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , Jason Gunthorpe , Vlastimil Babka 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, linux-coco@lists.linux.dev, Ackerley Tng X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1778185365; l=2393; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=IJ9ygQg2i33wnaaQVE2Mc6MqL5xTgBpcwYj9G+DyWUc=; b=VeIaOFh0QRNAhx7ITZjihhQCCPoaq56XsfynZgfAf40728nb0JQWZ3qa791FOBSgVrLiHp3Sr Wqf2l87sWQqBA/pJ9RB1dMLcqLJrAdcw0v3vXSyeN9vO6E5r6VhfNQ8 X-Developer-Key: i=ackerleytng@google.com; a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Endpoint-Received: by B4 Relay for ackerleytng@google.com/20260225 with auth_id=649 X-Original-From: Ackerley Tng Reply-To: ackerleytng@google.com X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: B3F2A4000E X-Stat-Signature: nod9sf3pw7omnqo9ixardwcgdf6xfdz9 X-Rspam-User: X-HE-Tag: 1778185381-47122 X-HE-Meta: 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 Tf/ShYF6 eS2e6+hMlJ/3mqV6vBlf2lC1VAPOqSeo20e2yA97CmJEXCyz5KaWfrgwyWdbD8QyY2domMPiLsLkKY26Yu56UjmtZ9qqiwkGh6Nr6AWyEoZWeSZjPm6Y3CpAdbjbPbGQp72Gy5Cx1fAb1Jr6J6Y9zOBl702EZnWAtfxE70+7GjORlmY1ASloB5pS+wlguv91VlQUFdfdaPbiDI/rK7lXkfIXqHZnl8bU/SrNrkZaATXUreY+F+lQ4sb0kyb5+74wkDCj/INLCbTDiqiT+IyOn85Suo66I5InaSaYO8T66WXQ2r10PBNlyUW9oJvC5IvSHuGkay9mKnNRJHJRnQoKJ1SxSCk8nsBUA953S5zBsRfDfGSpqX4WGDD8TbAHffvcGumPFbP/0O6KY96/uHfsWz15SrOdYdTguryOh7SBc7lmQHrSTHy5vTMMCK+7xHWXVVTdcoFjHwPsYeiB6oYMglokRxA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Sean Christopherson Add a global variable, kvm_has_gmem_attributes, to make the result of checking for KVM_CAP_GUEST_MEMFD_MEMORY_ATTRIBUTES available to all tests. kvm_has_gmem_attributes is true if guest_memfd tracks memory attributes, as opposed to VM-level tracking. This global variable is synced to the guest for testing convenience, to avoid introducing subtle bugs when host/guest state is desynced. Signed-off-by: Sean Christopherson Signed-off-by: Ackerley Tng --- tools/testing/selftests/kvm/include/test_util.h | 2 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h index d9b433b834f1b..c280c3233f502 100644 --- a/tools/testing/selftests/kvm/include/test_util.h +++ b/tools/testing/selftests/kvm/include/test_util.h @@ -115,6 +115,8 @@ struct guest_random_state { extern u32 guest_random_seed; extern struct guest_random_state guest_rng; +extern bool kvm_has_gmem_attributes; + struct guest_random_state new_guest_random_state(u32 seed); u32 guest_random_u32(struct guest_random_state *state); diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index ff301e7c22b2f..5e34593ad79c4 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -24,6 +24,8 @@ u32 guest_random_seed; struct guest_random_state guest_rng; static u32 last_guest_seed; +bool kvm_has_gmem_attributes; + static size_t vcpu_mmap_sz(void); int __open_path_or_exit(const char *path, int flags, const char *enoent_help) @@ -521,6 +523,7 @@ struct kvm_vm *__vm_create(struct vm_shape shape, u32 nr_runnable_vcpus, } guest_rng = new_guest_random_state(guest_random_seed); sync_global_to_guest(vm, guest_rng); + sync_global_to_guest(vm, kvm_has_gmem_attributes); kvm_arch_vm_post_create(vm, nr_runnable_vcpus); @@ -2287,6 +2290,8 @@ void __attribute((constructor)) kvm_selftest_init(void) guest_random_seed = last_guest_seed = random(); pr_info("Random seed: 0x%x\n", guest_random_seed); + kvm_has_gmem_attributes = kvm_has_cap(KVM_CAP_GUEST_MEMFD_MEMORY_ATTRIBUTES); + kvm_selftest_arch_init(); } -- 2.54.0.563.g4f69b47b94-goog