{"id":2226028,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2226028/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260422023239.1171963-4-mrathor@linux.microsoft.com/","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.2/projects/28/?format=json","name":"Linux PCI development","link_name":"linux-pci","list_id":"linux-pci.vger.kernel.org","list_email":"linux-pci@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260422023239.1171963-4-mrathor@linux.microsoft.com>","list_archive_url":null,"date":"2026-04-22T02:32:29","name":"[V1,03/13] x86/hyperv: add insufficient memory support in irqdomain.c","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"2527109ababe43429be781794e206aa34fee19fc","submitter":{"id":91512,"url":"http://patchwork.ozlabs.org/api/1.2/people/91512/?format=json","name":"Mukesh R","email":"mrathor@linux.microsoft.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260422023239.1171963-4-mrathor@linux.microsoft.com/mbox/","series":[{"id":500915,"url":"http://patchwork.ozlabs.org/api/1.2/series/500915/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/list/?series=500915","date":"2026-04-22T02:32:26","name":"PCI passthru on Hyper-V (Part I)","version":1,"mbox":"http://patchwork.ozlabs.org/series/500915/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2226028/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2226028/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pci@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=linux.microsoft.com header.i=@linux.microsoft.com\n header.a=rsa-sha256 header.s=default header.b=UtQVZhp7;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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In case of such a failure,\nwe must deposit more memory and redo the hypercall. Add support for\nthat. Deposit memory needs partition id, make that a parameter to the\nmap interrupt function.\n\nSigned-off-by: Mukesh R \n---\n arch/x86/hyperv/irqdomain.c | 38 +++++++++++++++++++++++++++++++------\n 1 file changed, 32 insertions(+), 6 deletions(-)","diff":"diff --git a/arch/x86/hyperv/irqdomain.c b/arch/x86/hyperv/irqdomain.c\nindex b3ad50a874dc..229f986e08ea 100644\n--- a/arch/x86/hyperv/irqdomain.c\n+++ b/arch/x86/hyperv/irqdomain.c\n@@ -13,8 +13,9 @@\n #include \n #include \n \n-static int hv_map_interrupt(union hv_device_id hv_devid, bool level,\n-\t\tint cpu, int vector, struct hv_interrupt_entry *ret_entry)\n+static u64 hv_map_interrupt_hcall(u64 ptid, union hv_device_id hv_devid,\n+\t\t\t\t bool level, int cpu, int vector,\n+\t\t\t\t struct hv_interrupt_entry *ret_entry)\n {\n \tstruct hv_input_map_device_interrupt *input;\n \tstruct hv_output_map_device_interrupt *output;\n@@ -30,8 +31,10 @@ static int hv_map_interrupt(union hv_device_id hv_devid, bool level,\n \n \tintr_desc = &input->interrupt_descriptor;\n \tmemset(input, 0, sizeof(*input));\n-\tinput->partition_id = hv_current_partition_id;\n+\n+\tinput->partition_id = ptid;\n \tinput->device_id = hv_devid.as_uint64;\n+\n \tintr_desc->interrupt_type = HV_X64_INTERRUPT_TYPE_FIXED;\n \tintr_desc->vector_count = 1;\n \tintr_desc->target.vector = vector;\n@@ -64,6 +67,28 @@ static int hv_map_interrupt(union hv_device_id hv_devid, bool level,\n \n \tlocal_irq_restore(flags);\n \n+\treturn status;\n+}\n+\n+static int hv_map_interrupt(u64 ptid, union hv_device_id device_id, bool level,\n+\t\t\t int cpu, int vector,\n+\t\t\t struct hv_interrupt_entry *ret_entry)\n+{\n+\tu64 status;\n+\tint rc, deposit_pgs = 16;\t\t/* don't loop forever */\n+\n+\twhile (deposit_pgs--) {\n+\t\tstatus = hv_map_interrupt_hcall(ptid, device_id, level, cpu,\n+\t\t\t\t\t\tvector, ret_entry);\n+\n+\t\tif (hv_result(status) != HV_STATUS_INSUFFICIENT_MEMORY)\n+\t\t\tbreak;\n+\n+\t\trc = hv_call_deposit_pages(NUMA_NO_NODE, ptid, 1);\n+\t\tif (rc)\n+\t\t\tbreak;\n+\t}\n+\n \tif (!hv_result_success(status))\n \t\thv_status_err(status, \"\\n\");\n \n@@ -199,8 +224,8 @@ int hv_map_msi_interrupt(struct irq_data *data,\n \thv_devid = hv_build_devid_type_pci(pdev);\n \tcpu = cpumask_first(irq_data_get_effective_affinity_mask(data));\n \n-\treturn hv_map_interrupt(hv_devid, false, cpu, cfg->vector,\n-\t\t\t\tout_entry ? out_entry : &dummy);\n+\treturn hv_map_interrupt(hv_current_partition_id, hv_devid, false, cpu,\n+\t\t\t\tcfg->vector, out_entry ? out_entry : &dummy);\n }\n EXPORT_SYMBOL_GPL(hv_map_msi_interrupt);\n \n@@ -423,6 +448,7 @@ int hv_map_ioapic_interrupt(int ioapic_id, bool level, int cpu, int vector,\n \thv_devid.device_type = HV_DEVICE_TYPE_IOAPIC;\n \thv_devid.ioapic.ioapic_id = (u8)ioapic_id;\n \n-\treturn hv_map_interrupt(hv_devid, level, cpu, vector, entry);\n+\treturn hv_map_interrupt(hv_current_partition_id, hv_devid, level, cpu,\n+\t\t\t\tvector, entry);\n }\n EXPORT_SYMBOL_GPL(hv_map_ioapic_interrupt);\n","prefixes":["V1","03/13"]}