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22 Jan 2024 08:32:23 -0800 Message-ID: Date: Mon, 22 Jan 2024 08:32:22 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 7/7] x86/vmware: Add TDX hypercall support Content-Language: en-US To: Alexey Makhalov , linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, bp@alien8.de, hpa@zytor.com, dave.hansen@linux.intel.com, mingo@redhat.com, tglx@linutronix.de Cc: x86@kernel.org, netdev@vger.kernel.org, richardcochran@gmail.com, linux-input@vger.kernel.org, dmitry.torokhov@gmail.com, zackr@vmware.com, linux-graphics-maintainer@vmware.com, pv-drivers@vmware.com, namit@vmware.com, timothym@vmware.com, akaher@vmware.com, jsipek@vmware.com, dri-devel@lists.freedesktop.org, daniel@ffwll.ch, airlied@gmail.com, tzimmermann@suse.de, mripard@kernel.org, maarten.lankhorst@linux.intel.com, horms@kernel.org, kirill.shutemov@linux.intel.com References: <20240109084052.58661-1-amakhalov@vmware.com> <20240109084052.58661-8-amakhalov@vmware.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 1/9/24 00:40, Alexey Makhalov wrote: > +#ifdef CONFIG_INTEL_TDX_GUEST > +unsigned long vmware_tdx_hypercall(unsigned long cmd, > + struct tdx_module_args *args) > +{ > + if (!hypervisor_is_type(X86_HYPER_VMWARE)) > + return ULONG_MAX; > + > + if (cmd & ~VMWARE_CMD_MASK) { > + pr_warn_once("Out of range command %lx\n", cmd); > + return ULONG_MAX; > + } > + > + args->r10 = VMWARE_TDX_VENDOR_LEAF; > + args->r11 = VMWARE_TDX_HCALL_FUNC; > + args->r12 = VMWARE_HYPERVISOR_MAGIC; > + args->r13 = cmd; > + args->r15 = 0; /* CPL */ > + > + __tdx_hypercall(args); > + > + return args->r12; > +} > +EXPORT_SYMBOL_GPL(vmware_tdx_hypercall); > +#endif This is the kind of wrapper that I was hoping for. Thanks. Acked-by: Dave Hansen