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qemu: Default to TPM 2.0 in most scenarios

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TPM 1.2 is a pretty bad default these days, especially for
architectures which were introduced when TPM 2.0 already existed.

We're already carving out exceptions for several scenarios, but
that's basically backwards: at this point, using TPM 1.2 is the
exception.

Restructure the code so that it reflects reality and we don't
have to remember to update it every time a new architecture is
introduced.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Andrea Bolognani 2024-06-04 18:40:29 +02:00
parent ca517f992e
commit 220b2690da
3 changed files with 10 additions and 7 deletions
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13
src/qemu/qemu_domain.c
View File

@ -6180,12 +6180,15 @@ qemuDomainTPMDefPostParse(virDomainTPMDef *tpm,
/* TPM 1.2 and 2 are not compatible, so we choose a specific version here */
if (tpm->type == VIR_DOMAIN_TPM_TYPE_EMULATOR &&
tpm->data.emulator.version == VIR_DOMAIN_TPM_VERSION_DEFAULT) {
if (tpm->model == VIR_DOMAIN_TPM_MODEL_SPAPR ||
tpm->model == VIR_DOMAIN_TPM_MODEL_CRB ||
qemuDomainIsARMVirt(def))
tpm->data.emulator.version = VIR_DOMAIN_TPM_VERSION_2_0;
else
/* tpm-tis on x86 defaults to TPM 1.2 to preserve the
* historical behavior, but in all other scenarios we want
* TPM 2.0 instead */
if (tpm->model == VIR_DOMAIN_TPM_MODEL_TIS &&
ARCH_IS_X86(def->os.arch)) {
tpm->data.emulator.version = VIR_DOMAIN_TPM_VERSION_1_2;
} else {
tpm->data.emulator.version = VIR_DOMAIN_TPM_VERSION_2_0;
}
}
return 0;

2
tests/qemuxmlconfdata/riscv64-virt-default-models.riscv64-latest.abi-update.xml
View File

@ -59,7 +59,7 @@
<target type='serial' port='0'/>
</console>
<tpm model='tpm-tis'>
<backend type='emulator' version='1.2'/>
<backend type='emulator' version='2.0'/>
</tpm>
<audio id='1' type='none'/>
<video>

2
tests/qemuxmlconfdata/riscv64-virt-default-models.riscv64-latest.xml
View File

@ -59,7 +59,7 @@
<target type='serial' port='0'/>
</console>
<tpm model='tpm-tis'>
<backend type='emulator' version='1.2'/>
<backend type='emulator' version='2.0'/>
</tpm>
<audio id='1' type='none'/>
<video>