uefi_nvram_storage: save restore nvram contents #1556
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vm/devices/firmware/firmware_uefi/src/service/nvram/spec_services/mod.rs
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Implement save/restore for HclCompatNvram/NvramStorage/InMemoryNvram so that OpenHCL doesn't need to re-read from the VMGS file after a servicing or other save-restore operation. This will help avoid panics if the VMGS file is not accessible in certain VM teardown cases.
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Implement save/restore for HclCompatNvram/NvramStorage/InMemoryNvram so that OpenHCL doesn't need to re-read from the VMGS file after a servicing or other save-restore operation. This will help avoid panics if the VMGS file is not accessible in certain VM teardown cases.
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Implement save/restore for HclCompatNvram/NvramStorage/InMemoryNvram so that OpenHCL doesn't need to re-read from the VMGS file after a servicing or other save-restore operation. This will help avoid panics if the VMGS file is not accessible in certain VM teardown cases.
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…1697) Fix for a previous change that would have broken VMs that were serviced to a new version of OpenHCL with the UEFI NVRAM saved state. The new version would have skipped loading from storage since it was restoring, and the saved state would have contained an empty Vec. This change converts it to an Option<Vec<>> to distinguish between missing saved state and no NVRAM entries. If the saved state is missing, the HclCompatNvram will lazy load from storage like it did before. Original PR here: #1556 This is something that should have been caught by cross-version servicing tests, which don't exist currently. We should follow up to add that soon.
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…icrosoft#1697) Fix for a previous change that would have broken VMs that were serviced to a new version of OpenHCL with the UEFI NVRAM saved state. The new version would have skipped loading from storage since it was restoring, and the saved state would have contained an empty Vec. This change converts it to an Option<Vec<>> to distinguish between missing saved state and no NVRAM entries. If the saved state is missing, the HclCompatNvram will lazy load from storage like it did before. Original PR here: microsoft#1556 This is something that should have been caught by cross-version servicing tests, which don't exist currently. We should follow up to add that soon.
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Implement save/restore for HclCompatNvram/NvramStorage/InMemoryNvram so that OpenHCL doesn't need to re-read from the VMGS file after a servicing or other save-restore operation. This will help avoid panics if the VMGS file is not accessible in certain VM teardown cases.
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Backported in #1675 |
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Backported in #1675 |
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Implement save/restore for HclCompatNvram/NvramStorage/InMemoryNvram so that OpenHCL doesn't need to re-read from the VMGS file after a servicing or other save-restore operation. This will help avoid panics if the VMGS file is not accessible in certain VM teardown cases.