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hw/uefi: add variable digest to vmstate

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Add digest to vmstate if needed.  Clear digest before
loading vmstate to make sure it is initialized.

Fixes: db1ecfb473 ("hw/uefi: add var-service-vars.c")
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20260304075954.584423-1-kraxel@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Gerd Hoffmann
2026-03-04 08:59:53 +01:00
committed by Philippe Mathieu-Daudé
parent a3b23b946c
commit b28c3ad1d6
1 changed files with 37 additions and 0 deletions
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37
hw/uefi/var-service-vars.c
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@@ -37,8 +37,41 @@ const VMStateDescription vmstate_uefi_time = {
},
};
static int uefi_vars_pre_load(void *opaque)
{
uefi_variable *var = opaque;
/* clear digest which is optional in the live migration data stream */
var->digest = NULL;
var->digest_size = 0;
return 0;
}
static bool uefi_vars_digest_is_needed(void *opaque)
{
uefi_variable *var = opaque;
if ((var->attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS)
&& !uefi_vars_is_sb_any(var)) {
return true;
}
return false;
}
const VMStateDescription vmstate_uefi_variable_digest = {
.name = "uefi-variable-digest",
.needed = uefi_vars_digest_is_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT32(digest_size, uefi_variable),
VMSTATE_VBUFFER_ALLOC_UINT32(digest, uefi_variable,
0, NULL, digest_size),
VMSTATE_END_OF_LIST()
},
};
const VMStateDescription vmstate_uefi_variable = {
.name = "uefi-variable",
.pre_load = uefi_vars_pre_load,
.fields = (VMStateField[]) {
VMSTATE_UINT8_ARRAY_V(guid.data, uefi_variable, sizeof(QemuUUID), 0),
VMSTATE_UINT32(name_size, uefi_variable),
@@ -49,6 +82,10 @@ const VMStateDescription vmstate_uefi_variable = {
VMSTATE_STRUCT(time, uefi_variable, 0, vmstate_uefi_time, efi_time),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * const []) {
&vmstate_uefi_variable_digest,
NULL
}
};
uefi_variable *uefi_vars_find_variable(uefi_vars_state *uv, QemuUUID guid,