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[kvmtool,3/6] riscv: Add zihintpause extension support

Message ID 20221018140854.69846-4-apatel@ventanamicro.com
State Accepted
Headers show
Series RISC-V Svinval, Zihintpause, anad Zicbom support | expand

Commit Message

Anup Patel Oct. 18, 2022, 2:08 p.m. UTC 
From: Mayuresh Chitale <mchitale@ventanamicro.com>

The zihintpause extension allows software to use the PAUSE instruction to
reduce energy consumption while executing spin-wait code sequences. Add the
zihintpause extension to the device tree if it is supported by the host.

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
---
 riscv/fdt.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/riscv/fdt.c b/riscv/fdt.c
index 42bc062..ef0bc47 100644
--- a/riscv/fdt.c
+++ b/riscv/fdt.c
@@ -20,6 +20,7 @@  struct isa_ext_info isa_info_arr[] = {
 	{"svpbmt", KVM_RISCV_ISA_EXT_SVPBMT},
 	{"sstc", KVM_RISCV_ISA_EXT_SSTC},
 	{"svinval", KVM_RISCV_ISA_EXT_SVINVAL},
+	{"zihintpause", KVM_RISCV_ISA_EXT_ZIHINTPAUSE},
 };
 
 static void dump_fdt(const char *dtb_file, void *fdt)