linux-kernel - [PATCH RFC 3/3] riscv: KVM: Add Svukte extension support for Guest/VM

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Message-Id: <20240920-dev-maxh-svukte-rebase-v1-3-7864a88a62bd@sifive.com>
Date: Fri, 20 Sep 2024 15:39:05 +0800
From: Max Hsu <max.hsu@...ive.com>
To: Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Anup Patel <anup@...infault.org>, Atish Patra <atishp@...shpatra.org>
Cc: Palmer Dabbelt <palmer@...ive.com>, linux-riscv@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 kvm@...r.kernel.org, kvm-riscv@...ts.infradead.org, 
 Max Hsu <max.hsu@...ive.com>, Samuel Holland <samuel.holland@...ive.com>
Subject: [PATCH RFC 3/3] riscv: KVM: Add Svukte extension support for
 Guest/VM

Add KVM ISA extension ONE_REG interface to allow VMM tools to
detect and enable Svukte extension for Guest/VM.

Reviewed-by: Samuel Holland <samuel.holland@...ive.com>
Signed-off-by: Max Hsu <max.hsu@...ive.com>
---
 arch/riscv/include/uapi/asm/kvm.h | 1 +
 arch/riscv/kvm/vcpu_onereg.c      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index e97db3296456e19f79ca02e4c4f70ae1b4abb48b..41b466b7ffaec421e8389d3f5b178580091a2c98 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -175,6 +175,7 @@ enum KVM_RISCV_ISA_EXT_ID {
 	KVM_RISCV_ISA_EXT_ZCF,
 	KVM_RISCV_ISA_EXT_ZCMOP,
 	KVM_RISCV_ISA_EXT_ZAWRS,
+	KVM_RISCV_ISA_EXT_SVUKTE,
 	KVM_RISCV_ISA_EXT_MAX,
 };
 
diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index b319c4c13c54ce22d2a7552f4c9f256a0c50780e..67237d6e53882a9fcd2cf265aa1704f25cc4a701 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -41,6 +41,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
 	KVM_ISA_EXT_ARR(SVINVAL),
 	KVM_ISA_EXT_ARR(SVNAPOT),
 	KVM_ISA_EXT_ARR(SVPBMT),
+	KVM_ISA_EXT_ARR(SVUKTE),
 	KVM_ISA_EXT_ARR(ZACAS),
 	KVM_ISA_EXT_ARR(ZAWRS),
 	KVM_ISA_EXT_ARR(ZBA),

-- 
2.43.2