[kvm-unit-tests PATCH 1/3] riscv: sbi: Add IPI extension support

[James Raphael Tiovalen <jamestiotio@gmail.com>]

Add IPI EID and FID constants and a helper function to perform the IPI
SBI ecall.

Signed-off-by: James Raphael Tiovalen <jamestiotio@gmail.com>
---
 lib/riscv/asm/sbi.h | 5 +++++
 riscv/sbi.c         | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/lib/riscv/asm/sbi.h b/lib/riscv/asm/sbi.h
index 73ab5438..6b485dd3 100644
--- a/lib/riscv/asm/sbi.h
+++ b/lib/riscv/asm/sbi.h
@@ -17,6 +17,7 @@
 enum sbi_ext_id {
 	SBI_EXT_BASE = 0x10,
 	SBI_EXT_TIME = 0x54494d45,
+	SBI_EXT_IPI = 0x735049,
 	SBI_EXT_HSM = 0x48534d,
 	SBI_EXT_SRST = 0x53525354,
 };
@@ -42,6 +43,10 @@ enum sbi_ext_time_fid {
 	SBI_EXT_TIME_SET_TIMER = 0,
 };
 
+enum sbi_ext_ipi_fid {
+	SBI_EXT_IPI_SEND_IPI = 0,
+};
+
 struct sbiret {
 	long error;
 	long value;
diff --git a/riscv/sbi.c b/riscv/sbi.c
index 2438c497..08bd6a95 100644
--- a/riscv/sbi.c
+++ b/riscv/sbi.c
@@ -32,6 +32,11 @@ static struct sbiret __time_sbi_ecall(unsigned long stime_value)
 	return sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value, 0, 0, 0, 0, 0);
 }
 
+static struct sbiret __ipi_sbi_ecall(unsigned long hart_mask, unsigned long hart_mask_base)
+{
+	return sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI, hart_mask, hart_mask_base, 0, 0, 0, 0);
+}
+
 static bool env_or_skip(const char *env)
 {
 	if (!getenv(env)) {
-- 
2.43.0