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From: Anup Patel <apatel@ventanamicro.com>
To: kvm-riscv@lists.infradead.org
Subject: [PATCH kvmtool 3/6] riscv: Add zihintpause extension support
Date: Tue, 18 Oct 2022 19:38:51 +0530	[thread overview]
Message-ID: <20221018140854.69846-4-apatel@ventanamicro.com> (raw)
In-Reply-To: <20221018140854.69846-1-apatel@ventanamicro.com>

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(+)

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)
-- 
2.34.1



  parent reply	other threads:[~2022-10-18 14:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-18 14:08 [PATCH kvmtool 0/6] RISC-V Svinval, Zihintpause, anad Zicbom support Anup Patel
2022-10-18 14:08 ` [PATCH kvmtool 1/6] Update UAPI headers based on Linux-6.1-rc1 Anup Patel
2022-10-18 14:08 ` [PATCH kvmtool 2/6] riscv: Add Svinval extension support Anup Patel
2022-10-18 14:08 ` Anup Patel [this message]
2022-10-18 14:08 ` [PATCH kvmtool 4/6] riscv: Move reg encoding helpers to kvm-cpu-arch.h Anup Patel
2022-10-18 14:08 ` [PATCH kvmtool 5/6] riscv: Add Zicbom extension support Anup Patel
2022-10-18 14:08 ` [PATCH kvmtool 6/6] riscv: Add --disable-<xyz> options to allow user disable extensions Anup Patel
2022-11-07 12:20 ` [PATCH kvmtool 0/6] RISC-V Svinval, Zihintpause, anad Zicbom support Anup Patel
2022-11-08 15:33   ` Will Deacon
2022-11-08 17:38 ` Will Deacon

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