diff mbox

[kvm-unit-tests,RFC,03/15] arm/arm64: ITS skeleton

Message ID 1480974406-29345-4-git-send-email-eric.auger@redhat.com
State New
Headers show

Commit Message

Eric Auger Dec. 5, 2016, 9:46 p.m. UTC 
At the moment we just detect the presence of ITS as part of the
GICv3 init routine and initialize its base address.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 arm/Makefile.common        |  1 +
 lib/arm/asm/gic-v3-its.h   | 22 ++++++++++++++++++++++
 lib/arm/asm/gic.h          |  1 +
 lib/arm/gic-v3-its.c       |  9 +++++++++
 lib/arm/gic.c              | 30 +++++++++++++++++++++++++-----
 lib/arm64/asm/gic-v3-its.h |  1 +
 6 files changed, 59 insertions(+), 5 deletions(-)
 create mode 100644 lib/arm/asm/gic-v3-its.h
 create mode 100644 lib/arm/gic-v3-its.c
 create mode 100644 lib/arm64/asm/gic-v3-its.h

Comments

Andrew Jones Dec. 6, 2016, 9:23 a.m. UTC | #1 
On Mon, Dec 05, 2016 at 10:46:34PM +0100, Eric Auger wrote:
> At the moment we just detect the presence of ITS as part of the
> GICv3 init routine and initialize its base address.
> 
> Signed-off-by: Eric Auger <eric.auger@redhat.com>
> ---
>  arm/Makefile.common        |  1 +
>  lib/arm/asm/gic-v3-its.h   | 22 ++++++++++++++++++++++
>  lib/arm/asm/gic.h          |  1 +
>  lib/arm/gic-v3-its.c       |  9 +++++++++
>  lib/arm/gic.c              | 30 +++++++++++++++++++++++++-----
>  lib/arm64/asm/gic-v3-its.h |  1 +
>  6 files changed, 59 insertions(+), 5 deletions(-)
>  create mode 100644 lib/arm/asm/gic-v3-its.h
>  create mode 100644 lib/arm/gic-v3-its.c
>  create mode 100644 lib/arm64/asm/gic-v3-its.h
> 
> diff --git a/arm/Makefile.common b/arm/Makefile.common
> index 6c0898f..070f349 100644
> --- a/arm/Makefile.common
> +++ b/arm/Makefile.common
> @@ -47,6 +47,7 @@ cflatobjs += lib/arm/bitops.o
>  cflatobjs += lib/arm/psci.o
>  cflatobjs += lib/arm/smp.o
>  cflatobjs += lib/arm/gic.o lib/arm/gic-v2.o lib/arm/gic-v3.o
> +cflatobjs += lib/arm/gic-v3-its.o
>  
>  libeabi = lib/arm/libeabi.a
>  eabiobjs = lib/arm/eabi_compat.o
> diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
> new file mode 100644
> index 0000000..2044565
> --- /dev/null
> +++ b/lib/arm/asm/gic-v3-its.h
> @@ -0,0 +1,22 @@
> +/*
> + * All ITS* defines are lifted from include/linux/irqchip/arm-gic-v3.h
> + *
> + * Copyright (C) 2016, Red Hat Inc, Andrew Jones <drjones@redhat.com>

s/Andrew/Eric/

> + *
> + * This work is licensed under the terms of the GNU LGPL, version 2.
> + */
> +#ifndef _ASMARM_GIC_V3_ITS_H_
> +#define _ASMARM_GIC_V3_ITS_H_
> +
> +#ifndef __ASSEMBLY__
> +
> +struct its_data {
> +	void *base;
> +};
> +
> +extern struct its_data its_data;
> +
> +#define gicv3_its_base()		(its_data.base)

Can't we just add the ITS base address to the current gicv3_data struct?

> +
> +#endif /* !__ASSEMBLY__ */
> +#endif /* _ASMARM_GIC_V3_ITS_H_ */
> diff --git a/lib/arm/asm/gic.h b/lib/arm/asm/gic.h
> index ea5fde9..73d4502 100644
> --- a/lib/arm/asm/gic.h
> +++ b/lib/arm/asm/gic.h
> @@ -30,6 +30,7 @@
>  
>  #include <asm/gic-v2.h>
>  #include <asm/gic-v3.h>
> +#include <asm/gic-v3-its.h>
>  
>  #ifndef __ASSEMBLY__
>  #include <asm/cpumask.h>
> diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
> new file mode 100644
> index 0000000..e382b80
> --- /dev/null
> +++ b/lib/arm/gic-v3-its.c
> @@ -0,0 +1,9 @@
> +/*
> + * Copyright (C) 2016, Red Hat Inc, Eric Auger <eric.auger@redhat.com>
> + *
> + * This work is licensed under the terms of the GNU LGPL, version 2.
> + */
> +#include <asm/gic.h>
> +
> +struct its_data its_data;
> +
> diff --git a/lib/arm/gic.c b/lib/arm/gic.c
> index 957a146..e551abd 100644
> --- a/lib/arm/gic.c
> +++ b/lib/arm/gic.c
> @@ -6,6 +6,7 @@
>  #include <devicetree.h>
>  #include <asm/gic.h>
>  #include <asm/io.h>
> +#include <asm/gic-v3-its.h>
>  
>  struct gic_common_ops *gic_common_ops;
>  
> @@ -17,12 +18,14 @@ struct gicv3_data gicv3_data;
>   * Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
>   */
>  static bool
> -gic_get_dt_bases(const char *compatible, void **base1, void **base2)
> +gic_get_dt_bases(const char *compatible, void **base1, void **base2,
> +		 void **base3)
>  {
>  	struct dt_pbus_reg reg;
> -	struct dt_device gic;
> +	struct dt_device gic, its;
>  	struct dt_bus bus;
> -	int node, ret;
> +	int node, subnode, ret, len;
> +	const void *fdt = dt_fdt();
>  
>  	dt_bus_init_defaults(&bus);
>  	dt_device_init(&gic, &bus, NULL);
> @@ -43,19 +46,36 @@ gic_get_dt_bases(const char *compatible, void **base1, void **base2)
>  	assert(ret == 0);
>  	*base2 = ioremap(reg.addr, reg.size);
>  
> +	if (base3 && !strcmp(compatible, "arm,gic-v3")) {
> +		dt_for_each_subnode(node, subnode) {
> +			const struct fdt_property *prop;
> +
> +			prop = fdt_get_property(fdt, subnode,
> +						"compatible", &len);
> +			if (!strcmp((char *)prop->data, "arm,gic-v3-its")) {
> +				dt_device_bind_node(&its, subnode);
> +				ret = dt_pbus_translate(&its, 0, &reg);
> +				assert(ret == 0);
> +				*base3 = ioremap(reg.addr, reg.size);
> +				break;
> +			}
> +		}
> +
> +	}
> +
>  	return true;
>  }
>  
>  int gicv2_init(void)
>  {
>  	return gic_get_dt_bases("arm,cortex-a15-gic",
> -			&gicv2_data.dist_base, &gicv2_data.cpu_base);
> +			&gicv2_data.dist_base, &gicv2_data.cpu_base, NULL);
>  }
>  
>  int gicv3_init(void)
>  {
>  	return gic_get_dt_bases("arm,gic-v3", &gicv3_data.dist_base,
> -			&gicv3_data.redist_base[0]);
> +			&gicv3_data.redist_base[0], &its_data.base);
>  }
>  
>  int gic_init(void)
> diff --git a/lib/arm64/asm/gic-v3-its.h b/lib/arm64/asm/gic-v3-its.h
> new file mode 100644
> index 0000000..083cba4
> --- /dev/null
> +++ b/lib/arm64/asm/gic-v3-its.h
> @@ -0,0 +1 @@
> +#include "../../arm/asm/gic-v3-its.h"
> -- 
> 2.5.5
> 
>

Thanks,
drew
diff mbox

Patch

diff --git a/arm/Makefile.common b/arm/Makefile.common
index 6c0898f..070f349 100644
--- a/arm/Makefile.common
+++ b/arm/Makefile.common
@@ -47,6 +47,7 @@  cflatobjs += lib/arm/bitops.o
 cflatobjs += lib/arm/psci.o
 cflatobjs += lib/arm/smp.o
 cflatobjs += lib/arm/gic.o lib/arm/gic-v2.o lib/arm/gic-v3.o
+cflatobjs += lib/arm/gic-v3-its.o
 
 libeabi = lib/arm/libeabi.a
 eabiobjs = lib/arm/eabi_compat.o
diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
new file mode 100644
index 0000000..2044565
--- /dev/null
+++ b/lib/arm/asm/gic-v3-its.h
@@ -0,0 +1,22 @@ 
+/*
+ * All ITS* defines are lifted from include/linux/irqchip/arm-gic-v3.h
+ *
+ * Copyright (C) 2016, Red Hat Inc, Andrew Jones <drjones@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.
+ */
+#ifndef _ASMARM_GIC_V3_ITS_H_
+#define _ASMARM_GIC_V3_ITS_H_
+
+#ifndef __ASSEMBLY__
+
+struct its_data {
+	void *base;
+};
+
+extern struct its_data its_data;
+
+#define gicv3_its_base()		(its_data.base)
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _ASMARM_GIC_V3_ITS_H_ */
diff --git a/lib/arm/asm/gic.h b/lib/arm/asm/gic.h
index ea5fde9..73d4502 100644
--- a/lib/arm/asm/gic.h
+++ b/lib/arm/asm/gic.h
@@ -30,6 +30,7 @@ 
 
 #include <asm/gic-v2.h>
 #include <asm/gic-v3.h>
+#include <asm/gic-v3-its.h>
 
 #ifndef __ASSEMBLY__
 #include <asm/cpumask.h>
diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
new file mode 100644
index 0000000..e382b80
--- /dev/null
+++ b/lib/arm/gic-v3-its.c
@@ -0,0 +1,9 @@ 
+/*
+ * Copyright (C) 2016, Red Hat Inc, Eric Auger <eric.auger@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.
+ */
+#include <asm/gic.h>
+
+struct its_data its_data;
+
diff --git a/lib/arm/gic.c b/lib/arm/gic.c
index 957a146..e551abd 100644
--- a/lib/arm/gic.c
+++ b/lib/arm/gic.c
@@ -6,6 +6,7 @@ 
 #include <devicetree.h>
 #include <asm/gic.h>
 #include <asm/io.h>
+#include <asm/gic-v3-its.h>
 
 struct gic_common_ops *gic_common_ops;
 
@@ -17,12 +18,14 @@  struct gicv3_data gicv3_data;
  * Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
  */
 static bool
-gic_get_dt_bases(const char *compatible, void **base1, void **base2)
+gic_get_dt_bases(const char *compatible, void **base1, void **base2,
+		 void **base3)
 {
 	struct dt_pbus_reg reg;
-	struct dt_device gic;
+	struct dt_device gic, its;
 	struct dt_bus bus;
-	int node, ret;
+	int node, subnode, ret, len;
+	const void *fdt = dt_fdt();
 
 	dt_bus_init_defaults(&bus);
 	dt_device_init(&gic, &bus, NULL);
@@ -43,19 +46,36 @@  gic_get_dt_bases(const char *compatible, void **base1, void **base2)
 	assert(ret == 0);
 	*base2 = ioremap(reg.addr, reg.size);
 
+	if (base3 && !strcmp(compatible, "arm,gic-v3")) {
+		dt_for_each_subnode(node, subnode) {
+			const struct fdt_property *prop;
+
+			prop = fdt_get_property(fdt, subnode,
+						"compatible", &len);
+			if (!strcmp((char *)prop->data, "arm,gic-v3-its")) {
+				dt_device_bind_node(&its, subnode);
+				ret = dt_pbus_translate(&its, 0, &reg);
+				assert(ret == 0);
+				*base3 = ioremap(reg.addr, reg.size);
+				break;
+			}
+		}
+
+	}
+
 	return true;
 }
 
 int gicv2_init(void)
 {
 	return gic_get_dt_bases("arm,cortex-a15-gic",
-			&gicv2_data.dist_base, &gicv2_data.cpu_base);
+			&gicv2_data.dist_base, &gicv2_data.cpu_base, NULL);
 }
 
 int gicv3_init(void)
 {
 	return gic_get_dt_bases("arm,gic-v3", &gicv3_data.dist_base,
-			&gicv3_data.redist_base[0]);
+			&gicv3_data.redist_base[0], &its_data.base);
 }
 
 int gic_init(void)
diff --git a/lib/arm64/asm/gic-v3-its.h b/lib/arm64/asm/gic-v3-its.h
new file mode 100644
index 0000000..083cba4
--- /dev/null
+++ b/lib/arm64/asm/gic-v3-its.h
@@ -0,0 +1 @@ 
+#include "../../arm/asm/gic-v3-its.h"