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AJvYcCW9ST0cdNVV7W2SOfZ7E3V7SqeRUoHcb3kzknW/oqjPDVMLN1YtSzVVUaDf8w1qJZrHyzLUQmkUb+MaZaAGFyU6EQilSSI6xPNqVw== X-Gm-Message-State: AOJu0YwifYzUhmHPpBwPZ4UL4XxNvatAWRcha7EXWXS5kp7vrMyaycod cObdyuW/r+U31C0sosruGsJRcgKJ3EAkU/JyXSk607JnFBDTCarX X-Google-Smtp-Source: AGHT+IEA4rqVnV0zCmstOW3Lm+tswAKk7lUuBX8iEtTS9cgrpMZ4GU/tM2sKL8kd/pn/zpEd0eSv3A== X-Received: by 2002:a05:600c:470b:b0:416:6a7a:8528 with SMTP id v11-20020a05600c470b00b004166a7a8528mr1630488wmo.39.1712562063310; Mon, 08 Apr 2024 00:41:03 -0700 (PDT) Received: from vasant-suse.suse.cz ([2001:9e8:ab70:9c00:7f0b:c18e:56a6:4f2]) by smtp.gmail.com with ESMTPSA id j3-20020adfff83000000b00341e2146b53sm8271413wrr.106.2024.04.08.00.41.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Apr 2024 00:41:02 -0700 (PDT) From: vsntk18@gmail.com To: x86@kernel.org Cc: cfir@google.com, dan.j.williams@intel.com, dave.hansen@linux.intel.com, ebiederm@xmission.com, erdemaktas@google.com, hpa@zytor.com, jgross@suse.com, jroedel@suse.de, jslaby@suse.cz, keescook@chromium.org, kexec@lists.infradead.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, luto@kernel.org, martin.b.radev@gmail.com, mhiramat@kernel.org, mstunes@vmware.com, nivedita@alum.mit.edu, peterz@infradead.org, rientjes@google.com, seanjc@google.com, stable@vger.kernel.org, thomas.lendacky@amd.com, virtualization@lists.linux-foundation.org, vkarasulli@suse.de, ashish.kalra@amd.com, michael.roth@amd.com, Borislav.Petkov@amd.com, Dhaval.Giani@amd.com Subject: [PATCH v5 01/10] x86/kexec/64: Disable kexec when SEV-ES is active Date: Mon, 8 Apr 2024 09:40:40 +0200 Message-Id: <20240408074049.7049-2-vsntk18@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240408074049.7049-1-vsntk18@gmail.com> References: <20240408074049.7049-1-vsntk18@gmail.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Joerg Roedel SEV-ES needs special handling to support kexec. Disable it when SEV-ES is active until support is implemented. Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel Signed-off-by: Vasant Karasulli --- arch/x86/kernel/machine_kexec_64.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c index b180d8e497c3..4696e149d70d 100644 --- a/arch/x86/kernel/machine_kexec_64.c +++ b/arch/x86/kernel/machine_kexec_64.c @@ -267,11 +267,22 @@ static void load_segments(void) ); } +static bool machine_kexec_supported(void) +{ + if (cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT)) + return false; + + return true; +} + int machine_kexec_prepare(struct kimage *image) { unsigned long start_pgtable; int result; + if (!machine_kexec_supported()) + return -ENOSYS; + /* Calculate the offsets */ start_pgtable = page_to_pfn(image->control_code_page) << PAGE_SHIFT; -- 2.34.1