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([2001:b07:6468:f312:5e2c:eb9a:a8b6:fd3e]) by smtp.googlemail.com with ESMTPSA id n8-20020adf8b08000000b001f046cc8891sm11364972wra.24.2022.03.13.07.12.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 13 Mar 2022 07:12:32 -0700 (PDT) Sender: Paolo Bonzini Message-ID: Date: Sun, 13 Mar 2022 15:12:31 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [RFC PATCH v5 017/104] KVM: TDX: Add helper functions to print TDX SEAMCALL error Content-Language: en-US To: isaku.yamahata@intel.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@gmail.com, Jim Mattson , erdemaktas@google.com, Connor Kuehl , Sean Christopherson References: <7d89296e776b125b75762c040879c16afa7b6da6.1646422845.git.isaku.yamahata@intel.com> From: Paolo Bonzini In-Reply-To: <7d89296e776b125b75762c040879c16afa7b6da6.1646422845.git.isaku.yamahata@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/4/22 20:48, isaku.yamahata@intel.com wrote: > From: Isaku Yamahata > > Add helper functions to print out errors from the TDX module in a uniform > manner. > > Signed-off-by: Isaku Yamahata > --- > arch/x86/kvm/Makefile | 2 +- > arch/x86/kvm/vmx/seamcall.h | 2 ++ > arch/x86/kvm/vmx/tdx_error.c | 22 ++++++++++++++++++++++ > 3 files changed, 25 insertions(+), 1 deletion(-) > create mode 100644 arch/x86/kvm/vmx/tdx_error.c > > diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile > index e8f83a7d0dc3..3d6550c73fb5 100644 > --- a/arch/x86/kvm/Makefile > +++ b/arch/x86/kvm/Makefile > @@ -24,7 +24,7 @@ kvm-$(CONFIG_KVM_XEN) += xen.o > kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \ > vmx/evmcs.o vmx/nested.o vmx/posted_intr.o vmx/main.o > kvm-intel-$(CONFIG_X86_SGX_KVM) += vmx/sgx.o > -kvm-intel-$(CONFIG_INTEL_TDX_HOST) += vmx/tdx.o vmx/seamcall.o > +kvm-intel-$(CONFIG_INTEL_TDX_HOST) += vmx/tdx.o vmx/seamcall.o vmx/tdx_error.o > > kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o svm/sev.o > > diff --git a/arch/x86/kvm/vmx/seamcall.h b/arch/x86/kvm/vmx/seamcall.h > index 604792e9a59f..5ac419cd8e27 100644 > --- a/arch/x86/kvm/vmx/seamcall.h > +++ b/arch/x86/kvm/vmx/seamcall.h > @@ -16,6 +16,8 @@ struct tdx_module_output; > u64 kvm_seamcall(u64 op, u64 rcx, u64 rdx, u64 r8, u64 r9, u64 r10, > struct tdx_module_output *out); > > +void pr_tdx_error(u64 op, u64 error_code, const struct tdx_module_output *out); > + > #endif /* !__ASSEMBLY__ */ > > #endif /* CONFIG_INTEL_TDX_HOST */ > diff --git a/arch/x86/kvm/vmx/tdx_error.c b/arch/x86/kvm/vmx/tdx_error.c > new file mode 100644 > index 000000000000..61ed855d1188 > --- /dev/null > +++ b/arch/x86/kvm/vmx/tdx_error.c > @@ -0,0 +1,22 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* functions to record TDX SEAMCALL error */ > + > +#include > +#include > + > +#include "tdx_ops.h" > + > +void pr_tdx_error(u64 op, u64 error_code, const struct tdx_module_output *out) > +{ > + if (!out) { > + pr_err_ratelimited("SEAMCALL[%lld] failed: 0x%llx\n", > + op, error_code); > + return; > + } > + > + pr_err_ratelimited( > + "SEAMCALL[%lld] failed: 0x%llx " > + "RCX 0x%llx, RDX 0x%llx, R8 0x%llx, R9 0x%llx, R10 0x%llx, R11 0x%llx\n", > + op, error_code, > + out->rcx, out->rdx, out->r8, out->r9, out->r10, out->r11); > +} Reviewed-by: Paolo Bonzini