From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Kelley Subject: [PATCH v6 08/10] Drivers: hv: vmbus: Add hooks for per-CPU IRQ Date: Sat, 14 Mar 2020 08:35:17 -0700 Message-ID: <1584200119-18594-9-git-send-email-mikelley@microsoft.com> References: <1584200119-18594-1-git-send-email-mikelley@microsoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1584200119-18594-1-git-send-email-mikelley@microsoft.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane-mx.org@lists.infradead.org To: will@kernel.org, ardb@kernel.org, arnd@arndb.de, 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, linux-efi@vger.kernel.org, linux-arch@vger.kernel.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com, marcelo.cerri@canonical.com, kys@microsoft.com Cc: sunilmut@microsoft.com, boqun.feng@gmail.com, mikelley@microsoft.com List-Id: linux-arch.vger.kernel.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 1c42ecb..0e5db78 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -59,6 +59,10 @@ 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 6098e0c..035d3df 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-mw2nam10on2123.outbound.protection.outlook.com ([40.107.94.123]:18974 "EHLO NAM10-MW2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726130AbgCOBcD (ORCPT ); Sat, 14 Mar 2020 21:32:03 -0400 From: Michael Kelley Subject: [PATCH v6 08/10] Drivers: hv: vmbus: Add hooks for per-CPU IRQ Date: Sat, 14 Mar 2020 08:35:17 -0700 Message-ID: <1584200119-18594-9-git-send-email-mikelley@microsoft.com> In-Reply-To: <1584200119-18594-1-git-send-email-mikelley@microsoft.com> References: <1584200119-18594-1-git-send-email-mikelley@microsoft.com> Content-Type: text/plain MIME-Version: 1.0 Sender: linux-arch-owner@vger.kernel.org List-ID: To: will@kernel.org, ardb@kernel.org, arnd@arndb.de, 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, linux-efi@vger.kernel.org, linux-arch@vger.kernel.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com, marcelo.cerri@canonical.com, kys@microsoft.com Cc: mikelley@microsoft.com, sunilmut@microsoft.com, boqun.feng@gmail.com Message-ID: <20200314153517.0tsSaTakynsYzet5S5NZCBD6zU0kiXz-Y0uCEQ_TXjQ@z> 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 1c42ecb..0e5db78 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -59,6 +59,10 @@ 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 6098e0c..035d3df 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