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Thu, 3 Oct 2019 19:03:26 +0000 Received: from SN6PR2101MB1135.namprd21.prod.outlook.com ([fe80::7d4a:b5b3:1062:e62]) by SN6PR2101MB1135.namprd21.prod.outlook.com ([fe80::7d4a:b5b3:1062:e62%5]) with mapi id 15.20.2327.004; Thu, 3 Oct 2019 19:03:25 +0000 From: Michael Kelley To: "will@kernel.org" , "catalin.marinas@arm.com" , "mark.rutland@arm.com" , "maz@kernel.org" , "linux-arm-kernel@lists.infradead.org" , "gregkh@linuxfoundation.org" , "linux-kernel@vger.kernel.org" , "linux-hyperv@vger.kernel.org" , "devel@linuxdriverproject.org" , "olaf@aepfle.de" , "apw@canonical.com" , vkuznets , "jasowang@redhat.com" , "marcelo.cerri@canonical.com" , KY Srinivasan Subject: [PATCH v5 7/8] Drivers: hv: vmbus: Add hooks for per-CPU IRQ Thread-Topic: [PATCH v5 7/8] Drivers: hv: vmbus: Add hooks for per-CPU IRQ Thread-Index: AQHVeh08iAhZ6pKxjEa5CJwraGxfEg== Date: Thu, 3 Oct 2019 19:03:25 +0000 Message-ID: <1570129355-16005-8-git-send-email-mikelley@microsoft.com> References: <1570129355-16005-1-git-send-email-mikelley@microsoft.com> In-Reply-To: <1570129355-16005-1-git-send-email-mikelley@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR10CA0006.namprd10.prod.outlook.com (2603:10b6:301::16) To SN6PR2101MB1135.namprd21.prod.outlook.com (2603:10b6:805:4::24) authentication-results: spf=none (sender IP is ) smtp.mailfrom=mikelley@microsoft.com; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add hooks to enable/disable a per-CPU IRQ for VMbus. These hooks are in the architecture independent setup and shutdown paths for Hyper-V, and are needed by Linux guests on Hyper-V on ARM64. The x86/x64 implementation is null because VMbus interrupts on x86/x64 don't use an IRQ. Signed-off-by: Michael Kelley --- arch/x86/include/asm/mshyperv.h | 4 ++++ drivers/hv/hv.c | 3 +++ 2 files changed, 7 insertions(+) diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index f4138ae..583e1ce 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -56,6 +56,10 @@ typedef int (*hyperv_fill_flush_list_func)( #endif void hyperv_vector_handler(struct pt_regs *regs); +/* On x86/x64, there isn't a real IRQ to be enabled/disable */ +static inline void hv_enable_vmbus_irq(void) {} +static inline void hv_disable_vmbus_irq(void) {} + /* * Routines for stimer0 Direct Mode handling. * On x86/x64, there are no percpu actions to take. diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index fcc5279..51d8f8a 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -180,6 +180,7 @@ void hv_synic_enable_regs(unsigned int cpu) hv_set_siefp(siefp.as_uint64); /* Setup the shared SINT. */ + hv_enable_vmbus_irq(); hv_get_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64); shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR; @@ -241,6 +242,8 @@ void hv_synic_disable_regs(unsigned int cpu) hv_get_synic_state(sctrl.as_uint64); sctrl.enable = 0; hv_set_synic_state(sctrl.as_uint64); + + hv_disable_vmbus_irq(); } int hv_synic_cleanup(unsigned int cpu) -- 1.8.3.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel