From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AD162ECAAA1 for ; Sun, 30 Oct 2022 21:24:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=XEs+44PxNe4phUT9IyF+N1gUWWoXRh8mkRqmtUn/tXA=; b=uX4DmydiDRPbZ7 lEptD+ovN9gPR1UV7vu+WqsOaXTJCAWrg8/66ZPJ7lJ7gQF30KHMrRMeBbU7E0GeRKrGu9Uo6beRB EC2y3ctKdSOrydQnoo80liEWJV6hCgUnpaK36Rq/gb6dDobN1Hm1nmqkakDEHDZFIawUAXYq1zWE9 Wv0tKcRbmwPDCe+tXSzq65F64Ko0JXg98F6y71WRAAHC2WldFkfoaKSJKdJtZz13BXYOSvaFxHTHE py443vHLSFpgPZzq/bYGgitroTV1T6cqj2In1gHZ1KIEcLhMJXbB2WA+zht8+nEyNbj+eYVn6r3nC cZlZcunkYBh9umQE/veg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1opFmn-003KXK-VR; Sun, 30 Oct 2022 21:24:06 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1opFmk-003KT8-M2; Sun, 30 Oct 2022 21:24:04 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1A8AA60F43; Sun, 30 Oct 2022 21:23:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45637C433C1; Sun, 30 Oct 2022 21:23:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667165038; bh=MZXYnbDxYLpuLQnXFUBZl4NRjEWgToHPL0CaW13Bngw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=mNXckRaoPxITW4RSNEO6PP67/6RyWXQ3RH2Da8Ab5ncq21OJWHuenEw/iwbRwctPd tCHKD35AsKpXGFRpc1OFpXYo77Et+1kjxwRBA94YXx9Nd0mHrrgfp4fBSFbcaORW9M db4WGNpbwLqnx5FSDqz2mPGCfWFp2dRI2viDJU6K+RC64j5bAZsv69UG82j3rY6FjL kBxlP93svuKpnBjKIRY0rLq82hZjml+/vat6iM/Thrx9nrIYYgPGxxIu2qCMzMSIEd ouBCAGwnuUBp8Ser+Pbv7D6pOkUnlahQfTPYvLaX/vIdoOjGRTTLqT8XWV2ZMJ5X6K 2hX1jxuG+q5BA== Date: Sun, 30 Oct 2022 21:23:53 +0000 From: Conor Dooley To: Andrew Jones Cc: linux-riscv@lists.infradead.org, kvm-riscv@lists.infradead.org, Paul Walmsley , Palmer Dabbelt , Albert Ou , Anup Patel , Heiko Stuebner , Conor Dooley , Atish Patra , Jisheng Zhang Subject: Re: [PATCH 6/9] RISC-V: KVM: Expose Zicboz to the guest Message-ID: References: <20221027130247.31634-1-ajones@ventanamicro.com> <20221027130247.31634-7-ajones@ventanamicro.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20221027130247.31634-7-ajones@ventanamicro.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221030_142402_779758_AC820982 X-CRM114-Status: GOOD ( 19.47 ) 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-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Thu, Oct 27, 2022 at 03:02:44PM +0200, Andrew Jones wrote: > Guests may use the cbo.zero instruction when the CPU has the Zicboz > extension and the hypervisor sets henvcfg.CBZE. > > Add Zicboz support for KVM guests which may be enabled and > disabled from KVM userspace using the ISA extension ONE_REG API. Ditto re: formulaic.. Doubt it's needed here, but: Reviewed-by: Conor Dooley > > Signed-off-by: Andrew Jones > --- > arch/riscv/include/uapi/asm/kvm.h | 1 + > arch/riscv/kvm/vcpu.c | 4 ++++ > 2 files changed, 5 insertions(+) > > diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h > index 4bbf55cb2b70..8dc21ceee7aa 100644 > --- a/arch/riscv/include/uapi/asm/kvm.h > +++ b/arch/riscv/include/uapi/asm/kvm.h > @@ -103,6 +103,7 @@ enum KVM_RISCV_ISA_EXT_ID { > KVM_RISCV_ISA_EXT_SVINVAL, > KVM_RISCV_ISA_EXT_ZIHINTPAUSE, > KVM_RISCV_ISA_EXT_ZICBOM, > + KVM_RISCV_ISA_EXT_ZICBOZ, > KVM_RISCV_ISA_EXT_MAX, > }; > > diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c > index 18a739070b51..7758faec590a 100644 > --- a/arch/riscv/kvm/vcpu.c > +++ b/arch/riscv/kvm/vcpu.c > @@ -62,6 +62,7 @@ static const unsigned long kvm_isa_ext_arr[] = { > KVM_ISA_EXT_ARR(SVPBMT), > KVM_ISA_EXT_ARR(ZIHINTPAUSE), > KVM_ISA_EXT_ARR(ZICBOM), > + KVM_ISA_EXT_ARR(ZICBOZ), > }; > > static unsigned long kvm_riscv_vcpu_base2isa_ext(unsigned long base_ext) > @@ -821,6 +822,9 @@ static void kvm_riscv_vcpu_update_config(const unsigned long *isa) > if (riscv_isa_extension_available(isa, ZICBOM)) > henvcfg |= (ENVCFG_CBIE | ENVCFG_CBCFE); > > + if (riscv_isa_extension_available(isa, ZICBOZ)) > + henvcfg |= ENVCFG_CBZE; > + > csr_write(CSR_HENVCFG, henvcfg); > #ifdef CONFIG_32BIT > csr_write(CSR_HENVCFGH, henvcfg >> 32); > -- > 2.37.3 > > > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv