From patchwork Wed Feb 12 01:43:17 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Roman Kisel X-Patchwork-Id: 13970925 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 7CAF6C0219B for ; Wed, 12 Feb 2025 01:45:04 +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:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=AAZd/a36HARyHdp+510YAxs0/PoFjrLrLsZ3rfIrEhE=; b=U/bJniUUJFkZtpFkVPjZPNId/9 KhA9jaBZ4CYQpCWX1dwVJQzITccfgMVJ6PXs1+5y/cNwVgTOPYKUUU6/Jwq2nL5ybr+Pao9o+BrEG MLGOO3KpIebafhTH6zasjiX8GbTGYq9Naeq6Tb842BEv8cFwKUNi1jyA88kxjNzsWNNCMJsClXT2F Rs168ms6/ivqHay248uJ4L2HKgnSMkKi2oyuClPeUltqKNsjN2Kl7XoW8iZoknmrLWDOPRQ4741Ec QcQXyZ8FwVaBAGzRvI0ae714ndTTxZxLgwIyOd/seOt3iS6EPFjMLFORn3RlHOEEuEaIH9OlbJ1z2 gKd1zNFA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1ti1o5-00000005rXK-1l17; Wed, 12 Feb 2025 01:44:53 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1ti1mf-00000005r3r-2sN8 for linux-arm-kernel@lists.infradead.org; Wed, 12 Feb 2025 01:43:26 +0000 Received: from romank-3650.corp.microsoft.com (unknown [131.107.160.188]) by linux.microsoft.com (Postfix) with ESMTPSA id D69412107AB9; Tue, 11 Feb 2025 17:43:23 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com D69412107AB9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1739324604; bh=AAZd/a36HARyHdp+510YAxs0/PoFjrLrLsZ3rfIrEhE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DRazXyTkBQM8jzof7aBxhuYIn9yf6y5Uw4Ucf1WNgwMy8MWhti7O4mWwec00Eh/4B S075Q4SOZR42Uzp41zFF8I0iJgdMqcSBeob1cw8rKc9sXGkT5LzlmEDefc6Ssz/0Ao rIC8G8gG/Zzljm3g63sidPg3YQLjY6SaLnfWm70I= From: Roman Kisel To: arnd@arndb.de, bhelgaas@google.com, bp@alien8.de, catalin.marinas@arm.com, conor+dt@kernel.org, dave.hansen@linux.intel.com, decui@microsoft.com, haiyangz@microsoft.com, hpa@zytor.com, krzk+dt@kernel.org, kw@linux.com, kys@microsoft.com, lpieralisi@kernel.org, manivannan.sadhasivam@linaro.org, mingo@redhat.com, robh@kernel.org, ssengar@linux.microsoft.com, tglx@linutronix.de, wei.liu@kernel.org, will@kernel.org, devicetree@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org Cc: benhill@microsoft.com, bperkins@microsoft.com, sunilmut@microsoft.com Subject: [PATCH hyperv-next v4 2/6] Drivers: hv: Enable VTL mode for arm64 Date: Tue, 11 Feb 2025 17:43:17 -0800 Message-ID: <20250212014321.1108840-3-romank@linux.microsoft.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250212014321.1108840-1-romank@linux.microsoft.com> References: <20250212014321.1108840-1-romank@linux.microsoft.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250211_174325_755814_F5E303C5 X-CRM114-Status: GOOD ( 13.89 ) 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 Kconfig dependencies for arm64 guests on Hyper-V require that be ACPI enabled, and limit VTL mode to x86/x64. To enable VTL mode on arm64 as well, update the dependencies. Since VTL mode requires DeviceTree instead of ACPI, don’t require arm64 guests on Hyper-V to have ACPI unconditionally. Signed-off-by: Roman Kisel --- drivers/hv/Kconfig | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig index 862c47b191af..db9912ef96a8 100644 --- a/drivers/hv/Kconfig +++ b/drivers/hv/Kconfig @@ -5,18 +5,20 @@ menu "Microsoft Hyper-V guest support" config HYPERV tristate "Microsoft Hyper-V client drivers" depends on (X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \ - || (ACPI && ARM64 && !CPU_BIG_ENDIAN) + || (ARM64 && !CPU_BIG_ENDIAN) + depends on (ACPI || HYPERV_VTL_MODE) select PARAVIRT select X86_HV_CALLBACK_VECTOR if X86 - select OF_EARLY_FLATTREE if OF help Select this option to run Linux as a Hyper-V client operating system. config HYPERV_VTL_MODE bool "Enable Linux to boot in VTL context" - depends on X86_64 && HYPERV + depends on (X86 || ARM64) depends on SMP + select OF_EARLY_FLATTREE + select OF default n help Virtual Secure Mode (VSM) is a set of hypervisor capabilities and @@ -31,7 +33,7 @@ config HYPERV_VTL_MODE Select this option to build a Linux kernel to run at a VTL other than the normal VTL0, which currently is only VTL2. This option - initializes the x86 platform for VTL2, and adds the ability to boot + initializes the kernel to run in VTL2, and adds the ability to boot secondary CPUs directly into 64-bit context as required for VTLs other than 0. A kernel built with this option must run at VTL2, and will not run as a normal guest.