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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


WARNING: multiple messages have this Message-ID (diff)
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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  parent reply	other threads:[~2021-05-12 19:36 UTC|newest]

Thread overview: 52+ 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 ` 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   ` Michael Kelley
2021-05-12 17:37 ` [PATCH v10 2/7] arm64: hyperv: Add Hyper-V hypercall and register access utilities Michael Kelley
2021-05-12 17:37   ` Michael Kelley
2021-05-14 12:52   ` Mark Rutland
2021-05-14 12:52     ` Mark Rutland
2021-05-14 15:14     ` Michael Kelley
2021-05-14 15:14       ` Michael Kelley
2021-05-17 11:44       ` Mark Rutland
2021-05-17 11:44         ` Mark Rutland
2021-05-17 16:41         ` Michael Kelley
2021-05-17 16:41           ` Michael Kelley
2021-05-12 17:37 ` Michael Kelley [this message]
2021-05-12 17:37   ` [PATCH v10 3/7] arm64: hyperv: Add Hyper-V clocksource/clockevent support Michael Kelley
2021-05-14 12:37   ` Mark Rutland
2021-05-14 12:37     ` Mark Rutland
2021-05-14 15:35     ` Michael Kelley
2021-05-14 15:35       ` Michael Kelley
2021-05-17 13:08       ` Mark Rutland
2021-05-17 13:08         ` Mark Rutland
2021-05-17 17:27         ` Michael Kelley
2021-05-17 17:27           ` Michael Kelley
2021-05-18 17:00           ` Mark Rutland
2021-05-18 17:00             ` Mark Rutland
2021-06-08 15:36             ` Michael Kelley
2021-06-08 15:36               ` Michael Kelley
2021-06-10 16:45               ` Mark Rutland
2021-06-10 16:45                 ` Mark Rutland
2021-06-14  2:42                 ` Michael Kelley
2021-06-14  2:42                   ` Michael Kelley
2021-06-16 20:17                   ` Michael Kelley
2021-06-16 20:17                     ` Michael Kelley
2021-06-22  9:54                   ` Mark Rutland
2021-06-22  9:54                     ` Mark Rutland
2021-06-23  8:56                     ` Marc Zyngier
2021-06-23  8:56                       ` Marc Zyngier
2021-06-28  2:21                       ` Michael Kelley
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   ` Michael Kelley
2021-05-12 17:37 ` [PATCH v10 5/7] arm64: hyperv: Initialize hypervisor on boot Michael Kelley
2021-05-12 17:37   ` Michael Kelley
2021-05-13 15:16   ` Wei Liu
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   ` Michael Kelley
2021-05-12 17:37 ` [PATCH v10 7/7] Drivers: hv: Enable Hyper-V code to be built on ARM64 Michael Kelley
2021-05-12 17:37   ` Michael Kelley
2021-05-13 13:17 ` [PATCH v10 0/7] Enable Linux guests on Hyper-V " Sudeep Holla
2021-05-13 13:17   ` Sudeep Holla

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