linux-kernel - [PATCH v7 10/16] RISC-V: KVM: Allow Zca, Zcf, Zcd and Zcb extensions for Guest/VM

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Message-ID: <20240619113529.676940-11-cleger@rivosinc.com>
Date: Wed, 19 Jun 2024 13:35:20 +0200
From: Clément Léger <cleger@...osinc.com>
To: Jonathan Corbet <corbet@....net>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Conor Dooley <conor@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Anup Patel <anup@...infault.org>,
	Shuah Khan <shuah@...nel.org>
Cc: Clément Léger <cleger@...osinc.com>,
	Atish Patra <atishp@...shpatra.org>,
	linux-doc@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	kvm@...r.kernel.org,
	kvm-riscv@...ts.infradead.org,
	linux-kselftest@...r.kernel.org
Subject: [PATCH v7 10/16] RISC-V: KVM: Allow Zca, Zcf, Zcd and Zcb extensions for Guest/VM

Extend the KVM ISA extension ONE_REG interface to allow KVM user space
to detect and enable Zca, Zcf, Zcd and Zcb extensions for Guest/VM.

Signed-off-by: Clément Léger <cleger@...osinc.com>
Reviewed-by: Anup Patel <anup@...infault.org>
Acked-by: Anup Patel <anup@...infault.org>
---
 arch/riscv/include/uapi/asm/kvm.h | 4 ++++
 arch/riscv/kvm/vcpu_onereg.c      | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index db482ef0ae1e..71b17a6799e6 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -169,6 +169,10 @@ enum KVM_RISCV_ISA_EXT_ID {
 	KVM_RISCV_ISA_EXT_ZACAS,
 	KVM_RISCV_ISA_EXT_SSCOFPMF,
 	KVM_RISCV_ISA_EXT_ZIMOP,
+	KVM_RISCV_ISA_EXT_ZCA,
+	KVM_RISCV_ISA_EXT_ZCB,
+	KVM_RISCV_ISA_EXT_ZCD,
+	KVM_RISCV_ISA_EXT_ZCF,
 	KVM_RISCV_ISA_EXT_MAX,
 };
 
diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 09f0aa92a4da..f68b15b15f0e 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -49,6 +49,10 @@ static const unsigned long kvm_isa_ext_arr[] = {
 	KVM_ISA_EXT_ARR(ZBKC),
 	KVM_ISA_EXT_ARR(ZBKX),
 	KVM_ISA_EXT_ARR(ZBS),
+	KVM_ISA_EXT_ARR(ZCA),
+	KVM_ISA_EXT_ARR(ZCB),
+	KVM_ISA_EXT_ARR(ZCD),
+	KVM_ISA_EXT_ARR(ZCF),
 	KVM_ISA_EXT_ARR(ZFA),
 	KVM_ISA_EXT_ARR(ZFH),
 	KVM_ISA_EXT_ARR(ZFHMIN),
@@ -134,6 +138,10 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
 	case KVM_RISCV_ISA_EXT_ZBKC:
 	case KVM_RISCV_ISA_EXT_ZBKX:
 	case KVM_RISCV_ISA_EXT_ZBS:
+	case KVM_RISCV_ISA_EXT_ZCA:
+	case KVM_RISCV_ISA_EXT_ZCB:
+	case KVM_RISCV_ISA_EXT_ZCD:
+	case KVM_RISCV_ISA_EXT_ZCF:
 	case KVM_RISCV_ISA_EXT_ZFA:
 	case KVM_RISCV_ISA_EXT_ZFH:
 	case KVM_RISCV_ISA_EXT_ZFHMIN:
-- 
2.45.2