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Sat, 8 Mar 2025 16:05:45 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface MIME-Version: 1.0 Date: Sat, 08 Mar 2025 22:05:24 +0100 From: "Arnd Bergmann" To: "Roman Kisel" , bhelgaas@google.com, "Borislav Petkov" , "Catalin Marinas" , "Conor Dooley" , "Dave Hansen" , "Dexuan Cui" , "Haiyang Zhang" , "H. Peter Anvin" , "Joey Gouly" , krzk+dt@kernel.org, =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= , "K. Y. Srinivasan" , "Len Brown" , "Lorenzo Pieralisi" , "Manivannan Sadhasivam" , "Mark Rutland" , "Marc Zyngier" , "Ingo Molnar" , "Oliver Upton" , "Rafael J . Wysocki" , "Rob Herring" , ssengar@linux.microsoft.com, "Sudeep Holla" , "Suzuki K Poulose" , "Thomas Gleixner" , "Wei Liu" , "Will Deacon" , "Zenghui Yu" , devicetree@vger.kernel.org, kvmarm@lists.linux.dev, linux-acpi@vger.kernel.org, Linux-Arch , 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: apais@microsoft.com, benhill@microsoft.com, bperkins@microsoft.com, sunilmut@microsoft.com Message-Id: In-Reply-To: <20250307220304.247725-4-romank@linux.microsoft.com> References: <20250307220304.247725-1-romank@linux.microsoft.com> <20250307220304.247725-4-romank@linux.microsoft.com> Subject: Re: [PATCH hyperv-next v5 03/11] Drivers: hv: Enable VTL mode for arm64 Content-Type: text/plain Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250308_130550_602616_1C52B5B8 X-CRM114-Status: UNSURE ( 9.08 ) X-CRM114-Notice: Please train this message. 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 On Fri, Mar 7, 2025, at 23:02, Roman Kisel wrote: > @@ -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_64 || ARM64) > depends on SMP > + select OF_EARLY_FLATTREE > + select OF > default n > help Having the dependency below the top-level Kconfig entry feels a little counterintuitive. You could flip that back as it was before by doing select HYPERV_VTL_MODE if !ACPI depends on ACPI || SMP in the HYPERV option, leaving the dependency on HYPERV in HYPERV_VTL_MODE. Is OF_EARLY_FLATTREE actually needed on x86? Arnd