[PATCH 1/2] platform: add a vendor_ext_provider override

[Heiko Stuebner]

The vendor_ext_provider is already meant to allow
vendor extensions to ecalls, so allow fdt-matched
platforms to define their own override.

Signed-off-by: Heiko Stuebner <heiko at sntech.de>
---
 platform/generic/include/platform_override.h |  5 +++++
 platform/generic/platform.c                  | 13 +++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/platform/generic/include/platform_override.h b/platform/generic/include/platform_override.h
index 4af8754..3d41a19 100644
--- a/platform/generic/include/platform_override.h
+++ b/platform/generic/include/platform_override.h
@@ -10,6 +10,7 @@
 #ifndef __PLATFORM_OVERRIDE_H__
 #define __PLATFORM_OVERRIDE_H__
 
+#include <sbi/sbi_trap.h>
 #include <sbi/sbi_types.h>
 
 struct platform_override {
@@ -21,6 +22,10 @@ struct platform_override {
 	void (*early_exit)(const struct fdt_match *match);
 	void (*final_exit)(const struct fdt_match *match);
 	int (*fdt_fixup)(void *fdt, const struct fdt_match *match);
+	int (*vendor_ext_provider)(long extid, long funcid,
+				   const struct sbi_trap_regs *regs,
+				   unsigned long *out_value,
+				   struct sbi_trap_info *out_trap);
 };
 
 #endif
diff --git a/platform/generic/platform.c b/platform/generic/platform.c
index bc6e761..f05da8e 100644
--- a/platform/generic/platform.c
+++ b/platform/generic/platform.c
@@ -209,6 +209,18 @@ static uint64_t generic_pmu_xlate_to_mhpmevent(uint32_t event_idx,
 	return evt_val;
 }
 
+static int generic_vendor_ext_provider(long extid, long funcid,
+				       const struct sbi_trap_regs *regs,
+				       unsigned long *out_value,
+				       struct sbi_trap_info *out_trap)
+{
+	if (generic_plat && generic_plat->vendor_ext_provider)
+		return generic_plat->vendor_ext_provider(extid, funcid, regs,
+							 out_value, out_trap);
+
+	return SBI_ENOTSUPP;
+}
+
 const struct sbi_platform_operations platform_ops = {
 	.nascent_init		= generic_nascent_init,
 	.early_init		= generic_early_init,
@@ -225,6 +237,7 @@ const struct sbi_platform_operations platform_ops = {
 	.get_tlbr_flush_limit	= generic_tlbr_flush_limit,
 	.timer_init		= fdt_timer_init,
 	.timer_exit		= fdt_timer_exit,
+	.vendor_ext_provider	= generic_vendor_ext_provider,
 };
 
 struct sbi_platform platform = {
-- 
2.35.1