linux-kernel - [PATCH v10 15/16] riscv: Add V extension to KVM ISA allow list

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Message-Id: <b8c1bf264d50c075620258dc27a05aadc42628ba.1652257230.git.greentime.hu@sifive.com>
Date:   Wed, 11 May 2022 08:31:25 +0000
From:   Greentime Hu <greentime.hu@...ive.com>
To:     palmer@...belt.com, paul.walmsley@...ive.com,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        aou@...s.berkeley.edu
Subject: [PATCH v10 15/16] riscv: Add V extension to KVM ISA allow list

From: Vincent Chen <vincent.chen@...ive.com>

Add V extension to KVM_RISCV_ISA_ALLOWED list to enable VCPU
to support V extension.

Signed-off-by: Vincent Chen <vincent.chen@...ive.com>
Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
---
 arch/riscv/include/asm/hwcap.h | 1 +
 arch/riscv/kvm/vcpu.c          | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index 0734e42f74f2..02ad7cf64d1c 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -33,6 +33,7 @@ extern unsigned long elf_hwcap;
 #define RISCV_ISA_EXT_m		('m' - 'a')
 #define RISCV_ISA_EXT_s		('s' - 'a')
 #define RISCV_ISA_EXT_u		('u' - 'a')
+#define RISCV_ISA_EXT_v		('v' - 'a')
 
 /*
  * Increse this to higher value as kernel support more ISA extensions.
diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c
index 7461f964d20a..c0a3be86d613 100644
--- a/arch/riscv/kvm/vcpu.c
+++ b/arch/riscv/kvm/vcpu.c
@@ -39,7 +39,8 @@ const struct kvm_stats_header kvm_vcpu_stats_header = {
 };
 
 #define KVM_RISCV_ISA_DISABLE_ALLOWED	(riscv_isa_extension_mask(d) | \
-					riscv_isa_extension_mask(f))
+					riscv_isa_extension_mask(f)  | \
+					riscv_isa_extension_mask(v))
 
 #define KVM_RISCV_ISA_DISABLE_NOT_ALLOWED	(riscv_isa_extension_mask(a) | \
 						riscv_isa_extension_mask(c) | \
-- 
2.17.1