From: Joerg Roedel <joro@8bytes.org>
To: x86@kernel.org
Cc: Joerg Roedel <joro@8bytes.org>, Joerg Roedel <jroedel@suse.de>,
stable@vger.kernel.org, Eric Biederman <ebiederm@xmission.com>,
kexec@lists.infradead.org, hpa@zytor.com,
Andy Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Jiri Slaby <jslaby@suse.cz>,
Dan Williams <dan.j.williams@intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Juergen Gross <jgross@suse.com>,
Kees Cook <keescook@chromium.org>,
David Rientjes <rientjes@google.com>,
Cfir Cohen <cfir@google.com>, Erdem Aktas <erdemaktas@google.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mike Stunes <mstunes@vmware.com>,
Sean Christopherson <seanjc@google.com>,
Martin Radev <martin.b.radev@gmail.com>,
Arvind Sankar <nivedita@alum.mit.edu>,
linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, virtualization@lists.linux-foundation.org
Subject: [PATCH v3 01/10] x86/kexec/64: Disable kexec when SEV-ES is active
Date: Thu, 27 Jan 2022 11:10:35 +0100 [thread overview]
Message-ID: <20220127101044.13803-2-joro@8bytes.org> (raw)
In-Reply-To: <20220127101044.13803-1-joro@8bytes.org>
From: Joerg Roedel <jroedel@suse.de>
SEV-ES needs special handling to support kexec. Disable it when SEV-ES
is active until support is implemented.
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
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 f5da4a18070a..5079a75f8944 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -269,11 +269,22 @@ 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
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: x86@kernel.org
Cc: kvm@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
virtualization@lists.linux-foundation.org,
Arvind Sankar <nivedita@alum.mit.edu>,
hpa@zytor.com, Jiri Slaby <jslaby@suse.cz>,
Joerg Roedel <joro@8bytes.org>,
David Rientjes <rientjes@google.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Martin Radev <martin.b.radev@gmail.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Joerg Roedel <jroedel@suse.de>, Kees Cook <keescook@chromium.org>,
Cfir Cohen <cfir@google.com>,
linux-coco@lists.linux.dev, Andy Lutomirski <luto@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
Juergen Gross <jgross@suse.com>, Mike Stunes <mstunes@vmware.com>,
Sean Christopherson <seanjc@google.com>,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, Eric Biederman <ebiederm@xmission.com>,
Erdem Aktas <erdemaktas@google.com>
Subject: [PATCH v3 01/10] x86/kexec/64: Disable kexec when SEV-ES is active
Date: Thu, 27 Jan 2022 11:10:35 +0100 [thread overview]
Message-ID: <20220127101044.13803-2-joro@8bytes.org> (raw)
In-Reply-To: <20220127101044.13803-1-joro@8bytes.org>
From: Joerg Roedel <jroedel@suse.de>
SEV-ES needs special handling to support kexec. Disable it when SEV-ES
is active until support is implemented.
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
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 f5da4a18070a..5079a75f8944 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -269,11 +269,22 @@ 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
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Virtualization@lists.linux-foundation.org
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next prev parent reply other threads:[~2022-01-27 10:17 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 10:10 [PATCH v3 00/10] x86/sev: KEXEC/KDUMP support for SEV-ES guests Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel [this message]
2022-01-27 10:10 ` [PATCH v3 01/10] x86/kexec/64: Disable kexec when SEV-ES is active Joerg Roedel
2022-01-27 10:10 ` [PATCH v3 02/10] x86/sev: Save and print negotiated GHCB protocol version Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-01-27 10:10 ` [PATCH v3 03/10] x86/sev: Set GHCB data structure version Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-01-27 10:10 ` [PATCH v3 04/10] x86/sev: Cache AP Jump Table Address Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-02-07 22:03 ` Sean Christopherson
2022-02-07 22:03 ` Sean Christopherson
2022-01-27 10:10 ` [PATCH v3 05/10] x86/sev: Setup code to park APs in the AP Jump Table Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-02-07 22:11 ` Sean Christopherson
2022-02-07 22:11 ` Sean Christopherson
2022-01-27 10:10 ` [PATCH v3 06/10] x86/sev: Park APs on AP Jump Table with GHCB protocol version 2 Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-01-27 10:10 ` [PATCH v3 07/10] x86/sev: Use AP Jump Table blob to stop CPU Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-01-27 10:10 ` [PATCH v3 08/10] x86/sev: Add MMIO handling support to boot/compressed/ code Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-01-27 10:10 ` [PATCH v3 09/10] x86/sev: Handle CLFLUSH MMIO events Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-01-27 10:10 ` [PATCH v3 10/10] x86/kexec/64: Support kexec under SEV-ES with AP Jump Table Blob Joerg Roedel
2022-01-27 10:10 ` Joerg Roedel
2022-04-29 9:06 ` [PATCH v3 00/10] x86/sev: KEXEC/KDUMP support for SEV-ES guests Tao Liu
2022-04-29 9:06 ` Tao Liu
2022-04-29 13:08 ` Tom Lendacky
2022-04-29 13:08 ` Tom Lendacky via Virtualization
2022-04-29 13:08 ` Tom Lendacky
2022-07-29 10:28 ` Tao Liu
2022-07-29 10:28 ` Tao Liu
2023-06-04 13:07 ` Baoquan He
2023-06-04 13:07 ` Baoquan He
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