From: Vasant Karasulli <vsntk18@gmail.com>
To: x86@kernel.org
Cc: joro@8bytes.org, 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,
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,
Joerg Roedel <jroedel@suse.de>,
Vasant Karasulli <vkarasulli@suse.de>
Subject: [PATCH v4 1/9] x86/kexec/64: Disable kexec when SEV-ES is active
Date: Mon, 11 Mar 2024 17:17:19 +0100 [thread overview]
Message-ID: <20240311161727.14916-2-vsntk18@gmail.com> (raw)
In-Reply-To: <20240311161727.14916-1-vsntk18@gmail.com>
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.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Vasant Karasulli <vkarasulli@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 bc0a5348b4a6..3671ea1a5045 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
next prev parent reply other threads:[~2024-03-11 16:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-11 16:17 [PATCH v4 0/9] x86/sev: KEXEC/KDUMP support for SEV-ES guests Vasant Karasulli
2024-03-11 16:17 ` Vasant Karasulli [this message]
2024-03-11 16:17 ` [PATCH v4 2/9] x86/sev: Save and print negotiated GHCB protocol version Vasant Karasulli
2024-03-11 16:17 ` [PATCH v4 3/9] x86/sev: Set GHCB data structure version Vasant Karasulli
2024-03-11 16:17 ` [PATCH v4 4/9] x86/sev: Setup code to park APs in the AP Jump Table Vasant Karasulli
2024-03-11 16:17 ` [PATCH v4 5/9] x86/sev: Park APs on AP Jump Table with GHCB protocol version 2 Vasant Karasulli
2024-03-11 16:17 ` [PATCH v4 6/9] x86/sev: Use AP Jump Table blob to stop CPU Vasant Karasulli
2024-03-11 16:17 ` [PATCH v4 7/9] x86/sev: Add MMIO handling support to boot/compressed/ code Vasant Karasulli
2024-03-11 16:17 ` [PATCH v4 8/9] x86/sev: Handle CLFLUSH MMIO events Vasant Karasulli
2024-03-11 16:17 ` [PATCH v4 9/9] x86/kexec/64: Support kexec under SEV-ES with AP Jump Table Blob Vasant Karasulli
2024-03-11 19:19 ` [PATCH v4 0/9] x86/sev: KEXEC/KDUMP support for SEV-ES guests Tom Lendacky
[not found] ` <CAF2zH5qZKEmECy=9vG4sLmdDt5k7nC=MwjKvJLyVfPyFzt+0hA@mail.gmail.com>
2024-03-12 14:04 ` Tom Lendacky
2024-03-12 15:16 ` Vasant Karasulli
2024-03-12 16:13 ` Tom Lendacky
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