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Mon, 01 Jun 2026 04:16:16 -0700 (PDT) Date: Mon, 1 Jun 2026 19:16:00 +0800 From: Inochi Amaoto To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Anup Patel , Atish Patra , Paolo Bonzini , Shuah Khan , Deepak Gupta , Thomas Huth , Charlie Jenkins , Sergey Matyukevich , Inochi Amaoto Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org, Yixun Lan , Longbin Li , Quan Zhou Subject: Re: [PATCH v2 4/7] RISC-V: KVM: Allow Zicfiss/Zicfilp extensions for Guest/VM Message-ID: References: <20260601084336.2601675-1-inochiama@gmail.com> <20260601084336.2601675-5-inochiama@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260601084336.2601675-5-inochiama@gmail.com> On Mon, Jun 01, 2026 at 04:43:32PM +0800, Inochi Amaoto wrote: > Extend the KVM ISA extension array to allow KVM userspace to > detect and enable Zicfiss/Zicfilp extensions for Guest/VM. > > Assisted-by: YuanSheng:claude-4.7-opus > Co-developed-by: Quan Zhou > Signed-off-by: Quan Zhou > Signed-off-by: Inochi Amaoto > --- > arch/riscv/include/uapi/asm/kvm.h | 2 ++ > arch/riscv/kvm/isa.c | 2 ++ > 2 files changed, 4 insertions(+) > I have forgot to add CSR_SSP to the context, will add in the next version. But I have a small question for it: could I reuse the generic subtype or use a new CSR subtype? Regards, Inochi > diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h > index 501e4fc60dd2..9f9c5ababd1e 100644 > --- a/arch/riscv/include/uapi/asm/kvm.h > +++ b/arch/riscv/include/uapi/asm/kvm.h > @@ -199,6 +199,8 @@ enum KVM_RISCV_ISA_EXT_ID { > KVM_RISCV_ISA_EXT_ZCLSD, > KVM_RISCV_ISA_EXT_ZILSD, > KVM_RISCV_ISA_EXT_ZALASR, > + KVM_RISCV_ISA_EXT_ZICFILP, > + KVM_RISCV_ISA_EXT_ZICFISS, > KVM_RISCV_ISA_EXT_MAX, > }; > > diff --git a/arch/riscv/kvm/isa.c b/arch/riscv/kvm/isa.c > index 1132d909cc25..9852a91fdecc 100644 > --- a/arch/riscv/kvm/isa.c > +++ b/arch/riscv/kvm/isa.c > @@ -65,6 +65,8 @@ static const unsigned long kvm_isa_ext_arr[] = { > KVM_ISA_EXT_ARR(ZICBOP), > KVM_ISA_EXT_ARR(ZICBOZ), > KVM_ISA_EXT_ARR(ZICCRSE), > + KVM_ISA_EXT_ARR(ZICFILP), > + KVM_ISA_EXT_ARR(ZICFISS), > KVM_ISA_EXT_ARR(ZICNTR), > KVM_ISA_EXT_ARR(ZICOND), > KVM_ISA_EXT_ARR(ZICSR), > -- > 2.54.0 > > > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv