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Wed, 15 May 2024 00:45:51 -0700 (PDT) Received: from [10.91.0.75] ([149.14.240.163]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3502bbbc334sm15620151f8f.103.2024.05.15.00.45.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 May 2024 00:45:51 -0700 (PDT) Message-ID: <1766fc9a-1d10-4c93-a9db-a7e0db8b01e7@linaro.org> Date: Wed, 15 May 2024 09:45:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/6] arm64/hyperv: Support DeviceTree To: Roman Kisel , arnd@arndb.de, bhelgaas@google.com, bp@alien8.de, catalin.marinas@arm.com, dave.hansen@linux.intel.com, decui@microsoft.com, haiyangz@microsoft.com, hpa@zytor.com, kw@linux.com, kys@microsoft.com, lenb@kernel.org, lpieralisi@kernel.org, mingo@redhat.com, mhklinux@outlook.com, rafael@kernel.org, robh@kernel.org, tglx@linutronix.de, wei.liu@kernel.org, will@kernel.org, linux-acpi@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: ssengar@microsoft.com, sunilmut@microsoft.com, vdso@hexbites.dev References: <20240514224508.212318-1-romank@linux.microsoft.com> <20240514224508.212318-2-romank@linux.microsoft.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 15/05/2024 00:43, Roman Kisel wrote: > The Virtual Trust Level platforms rely on DeviceTree, and the > arm64/hyperv code supports ACPI only. Update the logic to > support DeviceTree on boot as well as ACPI. > > Signed-off-by: Roman Kisel > --- > arch/arm64/hyperv/mshyperv.c | 34 +++++++++++++++++++++++++++++----- > 1 file changed, 29 insertions(+), 5 deletions(-) > > diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c > index b1a4de4eee29..208a3bcb9686 100644 > --- a/arch/arm64/hyperv/mshyperv.c > +++ b/arch/arm64/hyperv/mshyperv.c > @@ -15,6 +15,9 @@ > #include > #include > #include > +#include > +#include > +#include > #include > > static bool hyperv_initialized; > @@ -27,6 +30,29 @@ int hv_get_hypervisor_version(union hv_hypervisor_version_info *info) > return 0; > } > > +static bool hyperv_detect_fdt(void) > +{ > +#ifdef CONFIG_OF > + const unsigned long hyp_node = of_get_flat_dt_subnode_by_name( > + of_get_flat_dt_root(), "hypervisor"); Why do you add an ABI for node name? Although name looks OK, but is it really described in the spec that you depend on it? I really do not like name dependencies... Where is the binding for this? Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel