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Fri, 26 Apr 2024 16:44:54 -0700 (PDT) Received: from debug.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id c14-20020a170902b68e00b001e97772524asm10657366pls.234.2024.04.26.16.44.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Apr 2024 16:44:54 -0700 (PDT) Date: Fri, 26 Apr 2024 16:44:51 -0700 From: Deepak Gupta To: =?iso-8859-1?Q?Cl=E9ment_L=E9ger?= Cc: Conor Dooley , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Palmer Dabbelt , Albert Ou , Anup Patel , Atish Patra , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, Ved Shanbhogue Subject: Re: [RFC PATCH 1/7] riscv: kvm: add support for FWFT SBI extension Message-ID: References: <20240418142701.1493091-1-cleger@rivosinc.com> <20240418142701.1493091-2-cleger@rivosinc.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240418142701.1493091-2-cleger@rivosinc.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240426_164459_647407_18EB4197 X-CRM114-Status: GOOD ( 13.18 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Thu, Apr 18, 2024 at 04:26:40PM +0200, Cl=E9ment L=E9ger wrote: >Add support for FWFT extension in KVM > >Signed-off-by: Cl=E9ment L=E9ger >--- > arch/riscv/include/asm/kvm_host.h | 5 + > arch/riscv/include/asm/kvm_vcpu_sbi.h | 1 + > arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h | 37 ++++++ > arch/riscv/include/uapi/asm/kvm.h | 1 + > arch/riscv/kvm/Makefile | 1 + > arch/riscv/kvm/vcpu.c | 5 + > arch/riscv/kvm/vcpu_sbi.c | 4 + > arch/riscv/kvm/vcpu_sbi_fwft.c | 136 +++++++++++++++++++++ > 8 files changed, 190 insertions(+) > create mode 100644 arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h > create mode 100644 arch/riscv/kvm/vcpu_sbi_fwft.c > >diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kv= m_host.h >index 484d04a92fa6..be60aaa07f57 100644 >--- a/arch/riscv/include/asm/kvm_host.h >+++ b/arch/riscv/include/asm/kvm_host.h >@@ -19,6 +19,7 @@ > #include > #include > #include >+#include > #include > #include > >@@ -169,6 +170,7 @@ struct kvm_vcpu_csr { > struct kvm_vcpu_config { > u64 henvcfg; > u64 hstateen0; >+ u64 hedeleg; > }; > > struct kvm_vcpu_smstateen_csr { >@@ -261,6 +263,9 @@ struct kvm_vcpu_arch { > /* Performance monitoring context */ > struct kvm_pmu pmu_context; > >+ /* Firmware feature SBI extension context */ >+ struct kvm_sbi_fwft fwft_context; >+ > /* 'static' configurations which are set only once */ > struct kvm_vcpu_config cfg; > >diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi.h b/arch/riscv/include/as= m/kvm_vcpu_sbi.h >index b96705258cf9..3a33bbacc233 100644 >--- a/arch/riscv/include/asm/kvm_vcpu_sbi.h >+++ b/arch/riscv/include/asm/kvm_vcpu_sbi.h >@@ -86,6 +86,7 @@ extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_= srst; > extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_hsm; > extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_dbcn; > extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_sta; >+extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_fwft; > extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_experimental; > extern const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_vendor; > >diff --git a/arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h b/arch/riscv/inclu= de/asm/kvm_vcpu_sbi_fwft.h >new file mode 100644 >index 000000000000..7dc1b80c7e6c >--- /dev/null >+++ b/arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h >@@ -0,0 +1,37 @@ >+/* SPDX-License-Identifier: GPL-2.0-only */ >+/* >+ * Copyright (c) 2023 Rivos Inc >+ * >+ * Authors: >+ * Atish Patra nit: probably need to fix Copyright year and Authors here :-) Same in all new files being introduced. >+ */ >+ >+#ifndef __KVM_VCPU_RISCV_FWFT_H >+#define __KVM_VCPU_RISCV_FWFT_H >+ >+#include >+ >+#define KVM_SBI_FWFT_FEATURE_COUNT 1 >+ >+static int kvm_sbi_fwft_set(struct kvm_vcpu *vcpu, >+ enum sbi_fwft_feature_t feature, >+ unsigned long value, unsigned long flags) >+{ >+ struct kvm_sbi_fwft_config *conf =3D kvm_sbi_fwft_get_config(vcpu, >+ feature); >+ if (!conf) >+ return SBI_ERR_DENIED; Curious, Why denied and not something like NOT_SUPPORTED NOT_AVAILABLE here? >+ >+ if ((flags & ~SBI_FWFT_SET_FLAG_LOCK) !=3D 0) >+ return SBI_ERR_INVALID_PARAM; >+ >+ if (conf->flags & SBI_FWFT_SET_FLAG_LOCK) >+ return SBI_ERR_DENIED; >+ >+ conf->flags =3D flags; >+ >+ return conf->feature->set(vcpu, conf, value); >+} >+ _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv