From patchwork Wed Feb 26 23:07:57 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nuno Das Neves X-Patchwork-Id: 13993309 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 2B09BC19776 for ; Wed, 26 Feb 2025 23:13:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Voi1Fzc5rMEYO4WvoQDQTZIpM4gpYLEdpDjYw/a8q2U=; b=g0RBNRKNVW5fGFQE5zFIXTMnXY Dc/dLaYpzR2S9sC/uUu01X47GD8pkATraG5xSPjr+cILXGt3rWBrr+e4xhOrQlTZ5LBFL98Fo+qNX /q8NuO7E8TdBFCJXSpQBRr3E1l9CYnVHmJbsQBTvPIYGxPN1k4g1waT/CmS6QTTztluwdeaCjFLVf jCNLRWz0XaUxJjIAJPkbWGdvrhB0IQj88Xro86/hfFQ600/jm8B00k4dGfITqn7sIHeum+13kUf4T DXhog9q65mWcKRfLeil8WxrYVWgVlEllzUJeirPVmZYtmYSsLEVCGH3ftF5sCGYrcJ2fQXwbov70B 458TgaFA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tnQb0-00000005fjP-1FfZ; Wed, 26 Feb 2025 23:13:42 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tnQWS-00000005evI-30St for linux-arm-kernel@lists.infradead.org; Wed, 26 Feb 2025 23:09:02 +0000 Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id CD77A210EAC7; Wed, 26 Feb 2025 15:08:58 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com CD77A210EAC7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1740611338; bh=Voi1Fzc5rMEYO4WvoQDQTZIpM4gpYLEdpDjYw/a8q2U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UNghjiUyavrXy563jYLe842b99uvQooFQW3whJDmeHqz+uUE/kk7kLLUvpLpl0jnM 2ACKsoqMJy4B0cWZ7rrEyUOdtFsToxL7rQoGBTsj69Ll0CcbT87SUyXypUjLWewF+Q kieJUrEFEjuO3bqWI5Mc2rN9rtRkHdWoTiP/mAP0= From: Nuno Das Neves To: linux-hyperv@vger.kernel.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-acpi@vger.kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, mhklinux@outlook.com, decui@microsoft.com, catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, daniel.lezcano@linaro.org, joro@8bytes.org, robin.murphy@arm.com, arnd@arndb.de, jinankjain@linux.microsoft.com, muminulrussell@gmail.com, skinsburskii@linux.microsoft.com, mrathor@linux.microsoft.com, ssengar@linux.microsoft.com, apais@linux.microsoft.com, Tianyu.Lan@microsoft.com, stanislav.kinsburskiy@gmail.com, gregkh@linuxfoundation.org, vkuznets@redhat.com, prapal@linux.microsoft.com, muislam@microsoft.com, anrayabh@linux.microsoft.com, rafael@kernel.org, lenb@kernel.org, corbet@lwn.net Subject: [PATCH v5 03/10] arm64/hyperv: Add some missing functions to arm64 Date: Wed, 26 Feb 2025 15:07:57 -0800 Message-Id: <1740611284-27506-4-git-send-email-nunodasneves@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1740611284-27506-1-git-send-email-nunodasneves@linux.microsoft.com> References: <1740611284-27506-1-git-send-email-nunodasneves@linux.microsoft.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250226_150900_807234_6A1CD5F6 X-CRM114-Status: GOOD ( 11.72 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org These non-nested msr and fast hypercall functions are present in x86, but they must be available in both architetures for the root partition driver code. Signed-off-by: Nuno Das Neves Reviewed-by: Stanislav Kinsburskii --- arch/arm64/hyperv/hv_core.c | 17 +++++++++++++++++ arch/arm64/include/asm/mshyperv.h | 12 ++++++++++++ include/asm-generic/mshyperv.h | 2 ++ 3 files changed, 31 insertions(+) diff --git a/arch/arm64/hyperv/hv_core.c b/arch/arm64/hyperv/hv_core.c index 69004f619c57..e33a9e3c366a 100644 --- a/arch/arm64/hyperv/hv_core.c +++ b/arch/arm64/hyperv/hv_core.c @@ -53,6 +53,23 @@ u64 hv_do_fast_hypercall8(u16 code, u64 input) } EXPORT_SYMBOL_GPL(hv_do_fast_hypercall8); +/* + * hv_do_fast_hypercall16 -- Invoke the specified hypercall + * with arguments in registers instead of physical memory. + * Avoids the overhead of virt_to_phys for simple hypercalls. + */ +u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) +{ + struct arm_smccc_res res; + u64 control; + + control = (u64)code | HV_HYPERCALL_FAST_BIT; + + arm_smccc_1_1_hvc(HV_FUNC_ID, control, input1, input2, &res); + return res.a0; +} +EXPORT_SYMBOL_GPL(hv_do_fast_hypercall16); + /* * Set a single VP register to a 64-bit value. */ diff --git a/arch/arm64/include/asm/mshyperv.h b/arch/arm64/include/asm/mshyperv.h index 2e2f83bafcfb..2a900ba00622 100644 --- a/arch/arm64/include/asm/mshyperv.h +++ b/arch/arm64/include/asm/mshyperv.h @@ -40,6 +40,18 @@ static inline u64 hv_get_msr(unsigned int reg) return hv_get_vpreg(reg); } +/* + * Nested is not supported on arm64 + */ +static inline void hv_set_non_nested_msr(unsigned int reg, u64 value) +{ + hv_set_msr(reg, value); +} +static inline u64 hv_get_non_nested_msr(unsigned int reg) +{ + return hv_get_msr(reg); +} + /* SMCCC hypercall parameters */ #define HV_SMCCC_FUNC_NUMBER 1 #define HV_FUNC_ID ARM_SMCCC_CALL_VAL( \ diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index c020d5d0ec2a..258034dfd829 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -72,6 +72,8 @@ extern void * __percpu *hyperv_pcpu_output_arg; extern u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr); extern u64 hv_do_fast_hypercall8(u16 control, u64 input8); +extern u64 hv_do_fast_hypercall16(u16 control, u64 input1, u64 input2); + bool hv_isolation_type_snp(void); bool hv_isolation_type_tdx(void);