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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2021-01-26 11:36:47 -0600 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-16 17:15:39 +0100 |
| commit | 92a5199b29f6519aa5f774f4b96dc41954f641d1 (patch) | |
| tree | d6346db204e09ea7c5b2546dded9bb7ae457aa88 /softmmu/runstate.c | |
| parent | b2f73a0784b7a5eae2022ccf3293792bd008cc64 (diff) | |
| download | qemu-92a5199b29f6519aa5f774f4b96dc41954f641d1.zip qemu-92a5199b29f6519aa5f774f4b96dc41954f641d1.tar.gz qemu-92a5199b29f6519aa5f774f4b96dc41954f641d1.tar.bz2 | |
sev/i386: Don't allow a system reset under an SEV-ES guest
An SEV-ES guest does not allow register state to be altered once it has
been measured. When an SEV-ES guest issues a reboot command, Qemu will
reset the vCPU state and resume the guest. This will cause failures under
SEV-ES. Prevent that from occuring by introducing an arch-specific
callback that returns a boolean indicating whether vCPUs are resettable.
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: David Hildenbrand <david@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>
Message-Id: <1ac39c441b9a3e970e9556e1cc29d0a0814de6fd.1611682609.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'softmmu/runstate.c')
| -rw-r--r-- | softmmu/runstate.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/softmmu/runstate.c b/softmmu/runstate.c index a7fcb60..2874417 100644 --- a/softmmu/runstate.c +++ b/softmmu/runstate.c @@ -528,6 +528,9 @@ void qemu_system_reset_request(ShutdownCause reason) if (reboot_action == REBOOT_ACTION_SHUTDOWN && reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) { shutdown_requested = reason; + } else if (!cpus_are_resettable()) { + error_report("cpus are not resettable, terminating"); + shutdown_requested = reason; } else { reset_requested = reason; } |