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ppc/spapr: Support reboot of secure pseries guest

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A pseries guest can be run as a secure guest on Ultravisor-enabled
POWER platforms. When such a secure guest is reset, we need to
release/reset a few resources both on ultravisor and hypervisor side.
This is achieved by invoking this new ioctl KVM_PPC_SVM_OFF from the
machine reset path.

As part of this ioctl, the secure guest is essentially transitioned
back to normal mode so that it can reboot like a regular guest and
become secure again.

This ioctl has no effect when invoked for a normal guest. If this ioctl
fails for a secure guest, the guest is terminated.

Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
Message-Id: <20191219031445.8949-3-bharata@linux.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Bharata B Rao 2019-12-19 08:44:45 +05:30 • committed by David Gibson
parent 50fd0c375b
commit 905db91697
3 changed files with 22 additions and 0 deletions
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1
hw/ppc/spapr.c
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@ -1597,6 +1597,7 @@ static void spapr_machine_reset(MachineState *machine)
void *fdt;
int rc;
kvmppc_svm_off(&error_fatal);
spapr_caps_apply(spapr);
first_ppc_cpu = POWERPC_CPU(first_cpu);