From 53a6bd5c6e3e4f0cf3fcf1b0a326c13e9defdc50 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 18 Jul 2025 18:03:50 +0200 Subject: [PATCH 100/115] i386/tdx: Set value of based on capabilities of both KVM and QEMU RH-Author: Paolo Bonzini RH-MergeRequest: 391: TDX support, including attestation and device assignment RH-Jira: RHEL-15710 RHEL-20798 RHEL-49728 RH-Acked-by: Yash Mankad RH-Acked-by: Peter Xu RH-Acked-by: David Hildenbrand RH-Commit: [100/115] ebdd2061181d3ce95404931904e816171ae4f5ac (bonzini/rhel-qemu-kvm) KVM reports the supported TDVMCALL sub leafs in TDX capabilities. one for kernel-supported TDVMCALLs (userspace can set those blindly) and one for user-supported TDVMCALLs (userspace can set those if it knows how to handle them) Signed-off-by: Xiaoyao Li Link: https://lore.kernel.org/r/20250703024021.3559286-4-xiaoyao.li@intel.com Signed-off-by: Paolo Bonzini (cherry picked from commit 55be385b10658a2372f944fa41aaba016e1e8433) Signed-off-by: Paolo Bonzini --- target/i386/kvm/tdx.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index 2ca661cbc4..a24e15571a 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -1256,14 +1256,21 @@ out_free: g_free(task); } +#define SUPPORTED_TDVMCALLINFO_1_R11 (0) +#define SUPPORTED_TDVMCALLINFO_1_R12 (0) + void tdx_handle_get_tdvmcall_info(X86CPU *cpu, struct kvm_run *run) { if (run->tdx.get_tdvmcall_info.leaf != 1) { return; } - run->tdx.get_tdvmcall_info.r11 = 0; - run->tdx.get_tdvmcall_info.r12 = 0; + run->tdx.get_tdvmcall_info.r11 = (tdx_caps->user_tdvmcallinfo_1_r11 & + SUPPORTED_TDVMCALLINFO_1_R11) | + tdx_caps->kernel_tdvmcallinfo_1_r11; + run->tdx.get_tdvmcall_info.r12 = (tdx_caps->user_tdvmcallinfo_1_r12 & + SUPPORTED_TDVMCALLINFO_1_R12) | + tdx_caps->kernel_tdvmcallinfo_1_r12; run->tdx.get_tdvmcall_info.r13 = 0; run->tdx.get_tdvmcall_info.r14 = 0; -- 2.50.1