When we import a page, we have a page with
some data or empty, empty does not mean there is no data,
it rather means it's full of zeros. We can skip writing the
data as guest memory of the page is already zeroed.
A page could be partially filled and the rest of the content is zero.
Our IGVM generation tool only fills data here if there is some data
without zeros. Rest of them are padded. We only write data
without padding and compare whether we complete writing
the buffer content. Still it's a full page and update the variable
with length of the full page.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
Complete the isolated import, telling the
Microsoft hypervisor that import is done so that
MSHV can issue SNP_LAUNCH_FINISH command.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
Import all the isolated pages after parsing is
done on the iGVM file. Hypervisor adds those
pages for PSP measurement(part of the hashing).
Signed-off-by: Muminul Islam <muislam@microsoft.com>
For SEV-SNP guests we need to provide the extended memory. It follows a
very simple layout and very similar to other x86 guests.
First segment: [HIGH_RAM_START - MEM_32BIT_RESERVED_START]
PCI hole: [MEM_32BIT_RESERVED_START - RAM_64BIT_START]
Second segment: [RAM_64BIT_START - RAM_END]
Fixes#5993
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
There is no requirement to call copy_from_slice, since all the member
variables are identical and we can directly assign them value.
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
vmm: Add igvm module and loader module
Add a separate module named igvm to the vmm crate
with definitions to parse and load igvm to the guest memory.
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
Signed-off-by: Muminul Islam <muislam@microsoft.com>
