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target/i386: SEV: do not assume machine->cgs is SEV 

There can be other confidential computing classes that are not derived
from sev-common.  Avoid aborting when encountering them.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-06-05 20:09:44 +02:00
parent 0c4da54883
commit 109238a8d9
1 changed files with 3 additions and 1 deletions
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4
target/i386/sev.c
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@ -1712,7 +1712,9 @@ void sev_es_set_reset_vector(CPUState *cpu)
{
X86CPU *x86;
CPUX86State *env;
SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
ConfidentialGuestSupport *cgs = MACHINE(qdev_get_machine())->cgs;
SevCommonState *sev_common = SEV_COMMON(
object_dynamic_cast(OBJECT(cgs), TYPE_SEV_COMMON));
/* Only update if we have valid reset information */
if (!sev_common || !sev_common->reset_data_valid) {