From: Michael Kelley <mhkelley58@gmail.com>
To: will.deacon@arm.com, catalin.marinas@arm.com,
mark.rutland@arm.com, marc.zyngier@arm.com,
linux-arm-kernel@lists.infradead.org, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org, devel@linuxdriverproject.org,
olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com,
jasowang@redhat.com, leann.ogasawara@canonical.com,
marcelo.cerri@canonical.com, sthemmin@microsoft.com,
kys@microsoft.com
Cc: mikelley@microsoft.com
Subject: [PATCH 4/5] Drivers: hv: vmbus: Add hooks for per-CPU IRQ
Date: Tue, 19 Jun 2018 14:23:14 -0700 [thread overview]
Message-ID: <1529443395-20874-5-git-send-email-mikelley@microsoft.com> (raw)
In-Reply-To: <1529443395-20874-1-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>
Reviewed-by: James Morris <james.morris@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 3cd1431..27d0e83 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -101,6 +101,10 @@ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
void hv_setup_vmbus_irq(void (*handler)(void));
void hv_remove_vmbus_irq(void);
+/* 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) {}
+
void hv_setup_kexec_handler(void (*handler)(void));
void hv_remove_kexec_handler(void);
void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs));
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 658dc76..15f835a 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -298,6 +298,7 @@ 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(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
shared_sint.as_uint64);
@@ -431,6 +432,7 @@ int hv_synic_cleanup(unsigned int cpu)
hv_get_synic_state(sctrl.as_uint64);
sctrl.enable = 0;
hv_set_synic_state(sctrl.as_uint64);
+ hv_disable_vmbus_irq();
return 0;
}
--
1.8.3.1
next prev parent reply other threads:[~2018-06-19 21:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-19 21:23 [PATCH 0/5] Enable Linux guests on Hyper-V on ARM64 Michael Kelley
2018-06-19 21:23 ` [PATCH 1/5] arm64: mm: Add slow_virt_to_phys() Michael Kelley
2018-06-20 8:06 ` Mark Rutland
2018-06-19 21:23 ` [PATCH 2/5] arm64: hyperv: Add core Hyper-V include files Michael Kelley
2018-06-19 21:23 ` [PATCH 3/5] arm64: hyperv: Add support for Hyper-V as a hypervisor Michael Kelley
2018-06-19 21:23 ` Michael Kelley [this message]
2018-06-19 21:23 ` [PATCH 5/5] Drivers: hv: Enable CONFIG_HYPERV on ARM64 Michael Kelley
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