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b=NjG6C6kVGiKCxzkubKjbgZvHgieTINn2GOwBzp23gzhmI7oPC65BKPvbL2OPg10ayV4iL6UwkXtsUcjn145FG9HyoVTPhe3zFVysmFvXH4P3rutDqC29yGxgT/8a9NbxJYU4C5ey2NmPQxH+CGPQjZoYELbj0abIUAya0yhGTuk= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=vmware.com; Received: from MWHPR05MB3648.namprd05.prod.outlook.com (2603:10b6:301:45::23) by BY3PR05MB8275.namprd05.prod.outlook.com (2603:10b6:a03:3b6::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7025.18; Wed, 22 Nov 2023 23:31:29 +0000 Received: from MWHPR05MB3648.namprd05.prod.outlook.com ([fe80::10f0:590a:708:4ad7]) by MWHPR05MB3648.namprd05.prod.outlook.com ([fe80::10f0:590a:708:4ad7%2]) with mapi id 15.20.7025.019; Wed, 22 Nov 2023 23:31:29 +0000 From: Alexey Makhalov To: linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, hpa@zytor.com, x86@kernel.org, dave.hansen@linux.intel.co, bp@alien8.d, mingo@redhat.com, tglx@linutronix.de, zackr@vmware.com, timothym@vmware.com, dri-devel@lists.freedesktop.org, daniel@ffwll.ch, airlied@gmail.com, tzimmermann@suse.de, mripard@kernel.org, maarten.lankhorst@linux.intel.com Cc: netdev@vger.kernel.org, richardcochran@gmail.com, linux-input@vger.kernel.org, dmitry.torokhov@gmail.com, linux-graphics-maintainer@vmware.com, pv-drivers@vmware.com, namit@vmware.com, akaher@vmware.com, jsipek@vmware.com, Alexey Makhalov Subject: [PATCH 6/6] x86/vmware: Add TDX hypercall support Date: Wed, 22 Nov 2023 15:30:58 -0800 Message-Id: <20231122233058.185601-14-amakhalov@vmware.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231122233058.185601-1-amakhalov@vmware.com> References: <20231122233058.185601-1-amakhalov@vmware.com> X-ClientProxiedBy: BYAPR05CA0039.namprd05.prod.outlook.com (2603:10b6:a03:74::16) To MWHPR05MB3648.namprd05.prod.outlook.com (2603:10b6:301:45::23) Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWHPR05MB3648:EE_|BY3PR05MB8275:EE_ X-MS-Office365-Filtering-Correlation-Id: 18c5e9a4-e8cf-4fb8-0a14-08dbebb3273c X-LD-Processed: b39138ca-3cee-4b4a-a4d6-cd83d9dd62f0,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: vmware.com X-MS-Exchange-CrossTenant-Network-Message-Id: 18c5e9a4-e8cf-4fb8-0a14-08dbebb3273c X-MS-Exchange-CrossTenant-AuthSource: MWHPR05MB3648.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Nov 2023 23:31:29.6819 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b39138ca-3cee-4b4a-a4d6-cd83d9dd62f0 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 692e7TML/0gt0dxPiC1jgVoH5Sjwi7PYr6iB6F401aroVyO1QVZpaCZsSc0lszlAdQlUdDcR05SnIO26u49dCw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY3PR05MB8275 VMware hypercalls use I/O port, VMCALL or VMMCALL instructions. Add __tdx_hypercall path to support TDX guests. No change in high bandwidth hypercalls, as only low bandwidth ones are supported for TDX guests. Co-developed-by: Tim Merrifield Signed-off-by: Tim Merrifield Signed-off-by: Alexey Makhalov --- arch/x86/include/asm/vmware.h | 72 +++++++++++++++++++++++++++++++++++ arch/x86/kernel/cpu/vmware.c | 9 +++++ 2 files changed, 81 insertions(+) diff --git a/arch/x86/include/asm/vmware.h b/arch/x86/include/asm/vmware.h index 17091eba68cb..cd58ff8ef1af 100644 --- a/arch/x86/include/asm/vmware.h +++ b/arch/x86/include/asm/vmware.h @@ -40,6 +40,54 @@ extern u8 vmware_hypercall_mode; +#define VMWARE_TDX_VENDOR_LEAF 0x1AF7E4909ULL +#define VMWARE_TDX_HCALL_FUNC 1 + +extern void vmware_tdx_hypercall_args(struct tdx_module_args *args); + +/* + * TDCALL[TDG.VP.VMCALL] uses rax (arg0) and rcx (arg2), while the use of + * rbp (arg6) is discouraged by the TDX specification. Therefore, we + * remap those registers to r12, r13 and r14, respectively. + */ +static inline +unsigned long vmware_tdx_hypercall(unsigned long cmd, unsigned long in1, + unsigned long in3, unsigned long in4, + unsigned long in5, unsigned long in6, + uint32_t *out1, uint32_t *out2, + uint32_t *out3, uint32_t *out4, + uint32_t *out5, uint32_t *out6) +{ + struct tdx_module_args args = { + .r10 = VMWARE_TDX_VENDOR_LEAF, + .r11 = VMWARE_TDX_HCALL_FUNC, + .r12 = VMWARE_HYPERVISOR_MAGIC, + .r13 = cmd, + .rbx = in1, + .rdx = in3, + .rsi = in4, + .rdi = in5, + .r14 = in6, + }; + + vmware_tdx_hypercall_args(&args); + + if (out1) + *out1 = args.rbx; + if (out2) + *out2 = args.r13; + if (out3) + *out3 = args.rdx; + if (out4) + *out4 = args.rsi; + if (out5) + *out5 = args.rdi; + if (out6) + *out6 = args.r14; + + return args.r12; +} + /* * The low bandwidth call. The low word of edx is presumed to have OUT bit * set. The high word of edx may contain input data from the caller. @@ -67,6 +115,10 @@ unsigned long vmware_hypercall1(unsigned long cmd, unsigned long in1) { unsigned long out0; + if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) + return vmware_tdx_hypercall(cmd, in1, 0, 0, 0, 0, NULL, NULL, + NULL, NULL, NULL, NULL); + asm_inline volatile (VMWARE_HYPERCALL : "=a" (out0) : [port] "i" (VMWARE_HYPERVISOR_PORT), @@ -85,6 +137,10 @@ unsigned long vmware_hypercall3(unsigned long cmd, unsigned long in1, { unsigned long out0; + if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) + return vmware_tdx_hypercall(cmd, in1, 0, 0, 0, 0, out1, out2, + NULL, NULL, NULL, NULL); + asm_inline volatile (VMWARE_HYPERCALL : "=a" (out0), "=b" (*out1), "=c" (*out2) : [port] "i" (VMWARE_HYPERVISOR_PORT), @@ -104,6 +160,10 @@ unsigned long vmware_hypercall4(unsigned long cmd, unsigned long in1, { unsigned long out0; + if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) + return vmware_tdx_hypercall(cmd, in1, 0, 0, 0, 0, out1, out2, + out3, NULL, NULL, NULL); + asm_inline volatile (VMWARE_HYPERCALL : "=a" (out0), "=b" (*out1), "=c" (*out2), "=d" (*out3) : [port] "i" (VMWARE_HYPERVISOR_PORT), @@ -123,6 +183,10 @@ unsigned long vmware_hypercall5(unsigned long cmd, unsigned long in1, { unsigned long out0; + if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) + return vmware_tdx_hypercall(cmd, in1, in3, in4, in5, 0, NULL, + out2, NULL, NULL, NULL, NULL); + asm_inline volatile (VMWARE_HYPERCALL : "=a" (out0), "=c" (*out2) : [port] "i" (VMWARE_HYPERVISOR_PORT), @@ -145,6 +209,10 @@ unsigned long vmware_hypercall6(unsigned long cmd, unsigned long in1, { unsigned long out0; + if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) + return vmware_tdx_hypercall(cmd, in1, in3, 0, 0, 0, NULL, out2, + out3, out4, out5, NULL); + asm_inline volatile (VMWARE_HYPERCALL : "=a" (out0), "=c" (*out2), "=d" (*out3), "=S" (*out4), "=D" (*out5) @@ -166,6 +234,10 @@ unsigned long vmware_hypercall7(unsigned long cmd, unsigned long in1, { unsigned long out0; + if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) + return vmware_tdx_hypercall(cmd, in1, in3, in4, in5, 0, out1, + out2, out3, NULL, NULL, NULL); + asm_inline volatile (VMWARE_HYPERCALL : "=a" (out0), "=b" (*out1), "=c" (*out2), "=d" (*out3) : [port] "i" (VMWARE_HYPERVISOR_PORT), diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 3aa1adaed18f..0207e8ced92c 100644 --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -428,6 +428,15 @@ static bool __init vmware_legacy_x2apic_available(void) (eax & BIT(VCPU_LEGACY_X2APIC)); } +#ifdef CONFIG_INTEL_TDX_GUEST +/* __tdx_hypercall() is not exported. So, export the wrapper */ +void vmware_tdx_hypercall_args(struct tdx_module_args *args) +{ + __tdx_hypercall(args); +} +EXPORT_SYMBOL_GPL(vmware_tdx_hypercall_args); +#endif + #ifdef CONFIG_AMD_MEM_ENCRYPT static void vmware_sev_es_hcall_prepare(struct ghcb *ghcb, struct pt_regs *regs)