{"id":2227574,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2227574/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260424000544.9617-4-lucaaamaral@gmail.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.1/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260424000544.9617-4-lucaaamaral@gmail.com>","date":"2026-04-24T00:05:44","name":"[v5,3/3] target/arm/hvf: configure IPA granule on macOS 26","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"239b1ece83676a83ea0c8320ec978c3051d5deed","submitter":{"id":92822,"url":"http://patchwork.ozlabs.org/api/1.1/people/92822/?format=json","name":"Lucas Amaral","email":"lucaaamaral@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260424000544.9617-4-lucaaamaral@gmail.com/mbox/","series":[{"id":501263,"url":"http://patchwork.ozlabs.org/api/1.1/series/501263/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501263","date":"2026-04-24T00:05:43","name":"hvf: map granule abstraction, configurable IPA, and MAP_FIXED alignment fix","version":5,"mbox":"http://patchwork.ozlabs.org/series/501263/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227574/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227574/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=HkUuW2i9;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mail-dy1-x1335.google.com","X-Spam_score_int":"-20","X-Spam_score":"-2.1","X-Spam_bar":"--","X-Spam_report":"(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Read the ipa-granule property (set by hvf_accel_init) and configure\nthe HVF stage-2 translation granule via hv_vm_config_set_ipa_granule()\non macOS 26+. When ipa-granule=4k, use HV_IPA_GRANULE_4KB to allow\nHVF to map memory at 4KB granularity, matching 4KB-page guests on\nhosts with larger page sizes.\n\nIf macOS < 26 and a sub-host-page granule was requested, warn and\nfall back to the host page size.\n\nSigned-off-by: Lucas Amaral \n---\n target/arm/hvf/hvf.c | 32 ++++++++++++++++++++++++++++++++\n 1 file changed, 32 insertions(+)","diff":"diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c\nindex 1b5860c7..f506fc01 100644\n--- a/target/arm/hvf/hvf.c\n+++ b/target/arm/hvf/hvf.c\n@@ -1270,6 +1270,38 @@ hv_return_t hvf_arch_vm_create(MachineState *ms, uint32_t pa_range)\n }\n chosen_ipa_bit_size = pa_range;\n \n+ /*\n+ * Configure IPA granule from the ipa-granule property.\n+ * hvf_get_map_granule() was set by hvf_accel_init() before this call.\n+ */\n+ {\n+ uint64_t granule = hvf_get_map_granule();\n+ bool granule_set = false;\n+\n+#if defined(__MAC_OS_X_VERSION_MAX_ALLOWED) && \\\n+ (__MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_26_0)\n+ if (__builtin_available(macOS 26, *)) {\n+ hv_ipa_granule_t hv_gran = (granule <= 4 * KiB)\n+ ? HV_IPA_GRANULE_4KB : HV_IPA_GRANULE_16KB;\n+ ret = hv_vm_config_set_ipa_granule(config, hv_gran);\n+ if (ret != HV_SUCCESS) {\n+ error_report(\"HVF: failed to set IPA granule: %s\",\n+ hvf_return_string(ret));\n+ goto cleanup;\n+ }\n+ granule_set = true;\n+ }\n+#endif\n+\n+ if (!granule_set && granule < qemu_real_host_page_size()) {\n+ warn_report(\"HVF: ipa-granule=%zuKB requested but macOS < 26; \"\n+ \"falling back to host page size (%zuKB)\",\n+ (size_t)(granule / KiB),\n+ (size_t)(qemu_real_host_page_size() / KiB));\n+ hvf_set_map_granule(qemu_real_host_page_size());\n+ }\n+ }\n+\n ret = hv_vm_create(config);\n \n cleanup:\n","prefixes":["v5","3/3"]}