From: Michael Kelley <mikelley@microsoft.com>
To: will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com,
lorenzo.pieralisi@arm.com, sudeep.holla@arm.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-efi@vger.kernel.org, arnd@arndb.de, wei.liu@kernel.org,
ardb@kernel.org, daniel.lezcano@linaro.org, kys@microsoft.com
Cc: mikelley@microsoft.com
Subject: [PATCH v10 3/7] arm64: hyperv: Add Hyper-V clocksource/clockevent support
Date: Wed, 12 May 2021 10:37:43 -0700 [thread overview]
Message-ID: <1620841067-46606-4-git-send-email-mikelley@microsoft.com> (raw)
In-Reply-To: <1620841067-46606-1-git-send-email-mikelley@microsoft.com>
Add architecture specific definitions and functions needed
by the architecture independent Hyper-V clocksource driver.
Update the Hyper-V clocksource driver to be initialized
on ARM64.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
---
arch/arm64/include/asm/mshyperv.h | 12 ++++++++++++
drivers/clocksource/hyperv_timer.c | 14 ++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/arch/arm64/include/asm/mshyperv.h b/arch/arm64/include/asm/mshyperv.h
index c448704..b17299c 100644
--- a/arch/arm64/include/asm/mshyperv.h
+++ b/arch/arm64/include/asm/mshyperv.h
@@ -21,6 +21,7 @@
#include <linux/types.h>
#include <linux/arm-smccc.h>
#include <asm/hyperv-tlfs.h>
+#include <clocksource/arm_arch_timer.h>
/*
* Declare calls to get and set Hyper-V VP register values on ARM64, which
@@ -41,6 +42,17 @@ static inline u64 hv_get_register(unsigned int reg)
return hv_get_vpreg(reg);
}
+/* Define the interrupt ID used by STIMER0 Direct Mode interrupts. This
+ * value can't come from ACPI tables because it is needed before the
+ * Linux ACPI subsystem is initialized.
+ */
+#define HYPERV_STIMER0_VECTOR 31
+
+static inline u64 hv_get_raw_timer(void)
+{
+ return arch_timer_read_counter();
+}
+
/* SMCCC hypercall parameters */
#define HV_SMCCC_FUNC_NUMBER 1
#define HV_FUNC_ID ARM_SMCCC_CALL_VAL( \
diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
index 977fd05..270ad9c 100644
--- a/drivers/clocksource/hyperv_timer.c
+++ b/drivers/clocksource/hyperv_timer.c
@@ -569,3 +569,17 @@ void __init hv_init_clocksource(void)
hv_setup_sched_clock(read_hv_sched_clock_msr);
}
EXPORT_SYMBOL_GPL(hv_init_clocksource);
+
+/* Initialize everything on ARM64 */
+static int __init hyperv_timer_init(struct acpi_table_header *table)
+{
+ if (!hv_is_hyperv_initialized())
+ return -EINVAL;
+
+ hv_init_clocksource();
+ if (hv_stimer_alloc(true))
+ return -EINVAL;
+
+ return 0;
+}
+TIMER_ACPI_DECLARE(hyperv, ACPI_SIG_GTDT, hyperv_timer_init);
--
1.8.3.1
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next prev parent reply other threads:[~2021-05-12 17:41 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-12 17:37 [PATCH v10 0/7] Enable Linux guests on Hyper-V on ARM64 Michael Kelley
2021-05-12 17:37 ` [PATCH v10 1/7] asm-generic: hyperv: Fix incorrect architecture dependencies Michael Kelley
2021-05-12 17:37 ` [PATCH v10 2/7] arm64: hyperv: Add Hyper-V hypercall and register access utilities Michael Kelley
2021-05-14 12:52 ` Mark Rutland
2021-05-14 15:14 ` Michael Kelley
2021-05-17 11:44 ` Mark Rutland
2021-05-17 16:41 ` Michael Kelley
2021-05-12 17:37 ` Michael Kelley [this message]
2021-05-14 12:37 ` [PATCH v10 3/7] arm64: hyperv: Add Hyper-V clocksource/clockevent support Mark Rutland
2021-05-14 15:35 ` Michael Kelley
2021-05-17 13:08 ` Mark Rutland
2021-05-17 17:27 ` Michael Kelley
2021-05-18 17:00 ` Mark Rutland
2021-06-08 15:36 ` Michael Kelley
2021-06-10 16:45 ` Mark Rutland
2021-06-14 2:42 ` Michael Kelley
2021-06-16 20:17 ` Michael Kelley
2021-06-22 9:54 ` Mark Rutland
2021-06-23 8:56 ` Marc Zyngier
2021-06-28 2:21 ` Michael Kelley
2021-05-12 17:37 ` [PATCH v10 4/7] arm64: hyperv: Add kexec and panic handlers Michael Kelley
2021-05-12 17:37 ` [PATCH v10 5/7] arm64: hyperv: Initialize hypervisor on boot Michael Kelley
2021-05-13 15:16 ` Wei Liu
2021-05-12 17:37 ` [PATCH v10 6/7] arm64: efi: Export screen_info Michael Kelley
2021-05-12 17:37 ` [PATCH v10 7/7] Drivers: hv: Enable Hyper-V code to be built on ARM64 Michael Kelley
2021-05-13 13:17 ` [PATCH v10 0/7] Enable Linux guests on Hyper-V " Sudeep Holla
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