Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH v3 01/10] x86/kexec/64: Disable kexec when SEV-ES is active | Date | Thu, 27 Jan 2022 11:10:35 +0100 |
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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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