From: Michael Kelley <mikelley@microsoft.com>
To: "will.deacon@arm.com" <will.deacon@arm.com>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
"olaf@aepfle.de" <olaf@aepfle.de>,
"apw@canonical.com" <apw@canonical.com>,
vkuznets <vkuznets@redhat.com>,
"jasowang@redhat.com" <jasowang@redhat.com>,
"marcelo.cerri@canonical.com" <marcelo.cerri@canonical.com>,
KY Srinivasan <kys@microsoft.com>
Cc: Sunil Muthuswamy <sunilmut@microsoft.com>,
"boqun.feng" <boqun.feng@gmail.com>,
Michael Kelley <mikelley@microsoft.com>
Subject: [PATCH v4 7/8] Drivers: hv: vmbus: Add hooks for per-CPU IRQ
Date: Tue, 6 Aug 2019 20:31:11 +0000 [thread overview]
Message-ID: <1565122133-9086-8-git-send-email-mikelley@microsoft.com> (raw)
In-Reply-To: <1565122133-9086-1-git-send-email-mikelley@microsoft.com>
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 <mikelley@microsoft.com>
---
arch/x86/include/asm/mshyperv.h | 4 ++++
drivers/hv/hv.c | 2 ++
2 files changed, 6 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 6188fb7..86f5435 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -180,6 +180,7 @@ int hv_synic_init(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;
@@ -272,6 +273,7 @@ int hv_synic_cleanup(unsigned int cpu)
/* Disable the global synic bit */
sctrl.enable = 0;
hv_set_synic_state(sctrl.as_uint64);
+ hv_disable_vmbus_irq();
return 0;
}
--
1.8.3.1
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next prev parent reply other threads:[~2019-08-06 20:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 20:30 [PATCH v4 0/8] Enable Linux guests on Hyper-V on ARM64 Michael Kelley
2019-08-06 20:30 ` [PATCH v4 1/8] arm64: hyperv: Add core Hyper-V include files Michael Kelley
2019-08-06 20:30 ` [PATCH v4 2/8] arm64: hyperv: Add hypercall and register access functions Michael Kelley
2019-08-06 20:31 ` [PATCH v4 3/8] arm64: hyperv: Add memory alloc/free functions for Hyper-V size pages Michael Kelley
2019-08-06 20:31 ` [PATCH v4 4/8] arm64: hyperv: Add interrupt handlers for VMbus and stimer Michael Kelley
2019-08-06 20:31 ` [PATCH v4 5/8] arm64: hyperv: Add kexec and panic handlers Michael Kelley
2019-08-06 20:31 ` [PATCH v4 6/8] arm64: hyperv: Initialize hypervisor on boot Michael Kelley
2019-08-06 20:31 ` Michael Kelley [this message]
2019-08-06 20:31 ` [PATCH v4 8/8] Drivers: hv: Enable Hyper-V code to be built on ARM64 Michael Kelley
2019-08-28 3:33 ` [PATCH v4 0/8] Enable Linux guests on Hyper-V " Michael Kelley
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