linux-kernel - [PATCH 7/7] RISC-V: KVM: Allow Zvb* and Zvk* extensions for Guest/VM

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Date:   Wed, 12 Jul 2023 21:40:47 +0530
From:   Anup Patel <apatel@...tanamicro.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Atish Patra <atishp@...shpatra.org>
Cc:     Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Andrew Jones <ajones@...tanamicro.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Samuel Ortiz <sameo@...osinc.com>, kvm@...r.kernel.org,
        kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH 7/7] RISC-V: KVM: Allow Zvb* and Zvk* extensions for Guest/VM

We extend the KVM ISA extension ONE_REG interface to allow KVM
user space to detect and enable Zvb* and Zvk* extensions for
Guest/VM.

Signed-off-by: Anup Patel <apatel@...tanamicro.com>
---
 arch/riscv/include/uapi/asm/kvm.h |  9 +++++++++
 arch/riscv/kvm/vcpu_onereg.c      | 18 ++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index 182e7bdfc842..3929d3a7bd24 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -141,6 +141,15 @@ enum KVM_RISCV_ISA_EXT_ID {
 	KVM_RISCV_ISA_EXT_ZKSED,
 	KVM_RISCV_ISA_EXT_ZKSH,
 	KVM_RISCV_ISA_EXT_ZKT,
+	KVM_RISCV_ISA_EXT_ZVBB,
+	KVM_RISCV_ISA_EXT_ZVBC,
+	KVM_RISCV_ISA_EXT_ZVKG,
+	KVM_RISCV_ISA_EXT_ZVKNED,
+	KVM_RISCV_ISA_EXT_ZVKNHA,
+	KVM_RISCV_ISA_EXT_ZVKNHB,
+	KVM_RISCV_ISA_EXT_ZVKSED,
+	KVM_RISCV_ISA_EXT_ZVKSH,
+	KVM_RISCV_ISA_EXT_ZVKT,
 	KVM_RISCV_ISA_EXT_MAX,
 };
 
diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 08e077260214..89efa5e3e3f1 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -59,6 +59,15 @@ static const unsigned long kvm_isa_ext_arr[] = {
 	KVM_ISA_EXT_ARR(ZKSED),
 	KVM_ISA_EXT_ARR(ZKSH),
 	KVM_ISA_EXT_ARR(ZKT),
+	KVM_ISA_EXT_ARR(ZVBB),
+	KVM_ISA_EXT_ARR(ZVBC),
+	KVM_ISA_EXT_ARR(ZVKG),
+	KVM_ISA_EXT_ARR(ZVKNED),
+	KVM_ISA_EXT_ARR(ZVKNHA),
+	KVM_ISA_EXT_ARR(ZVKNHB),
+	KVM_ISA_EXT_ARR(ZVKSED),
+	KVM_ISA_EXT_ARR(ZVKSH),
+	KVM_ISA_EXT_ARR(ZVKT),
 };
 
 static unsigned long kvm_riscv_vcpu_base2isa_ext(unsigned long base_ext)
@@ -117,6 +126,15 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
 	case KVM_RISCV_ISA_EXT_ZKSED:
 	case KVM_RISCV_ISA_EXT_ZKSH:
 	case KVM_RISCV_ISA_EXT_ZKT:
+	case KVM_RISCV_ISA_EXT_ZVBB:
+	case KVM_RISCV_ISA_EXT_ZVBC:
+	case KVM_RISCV_ISA_EXT_ZVKG:
+	case KVM_RISCV_ISA_EXT_ZVKNED:
+	case KVM_RISCV_ISA_EXT_ZVKNHA:
+	case KVM_RISCV_ISA_EXT_ZVKNHB:
+	case KVM_RISCV_ISA_EXT_ZVKSED:
+	case KVM_RISCV_ISA_EXT_ZVKSH:
+	case KVM_RISCV_ISA_EXT_ZVKT:
 		return false;
 	default:
 		break;
-- 
2.34.1