hypervisor: mshv: modify GuestRequest handling for CVM

VMM needs to handle VMG exit for guest request. This patch
removes the old method that uses gpa_read/write(IOCTL and hypercall),
which is expen

hypervisor: mshv: modify GuestRequest handling for CVM

VMM needs to handle VMG exit for guest request. This patch
removes the old method that uses gpa_read/write(IOCTL and hypercall),
which is expensive and update the GHCB page using
mapped(root partition) struct.

Signed-off-by: Muminul Islam <muislam@microsoft.com>

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hypervisor: mshv: clear exitinfo1 using mapped ghcb address

After handling the VMG exit vmm needs to clear the exitinfo1
into the GHCB page. This patch replaces the old
method(gpa_write) and clear t

hypervisor: mshv: clear exitinfo1 using mapped ghcb address

After handling the VMG exit vmm needs to clear the exitinfo1
into the GHCB page. This patch replaces the old
method(gpa_write) and clear the exitinfo1 using mapped GHCB struct.

Signed-off-by: Muminul Islam <muislam@microsoft.com>

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hypervisor: mshv: implement extended guest requests with empty certs

Previously we didn't handle extended guest requests at all and always
returned an error. This lead to issues with some guests tha

hypervisor: mshv: implement extended guest requests with empty certs

Previously we didn't handle extended guest requests at all and always
returned an error. This lead to issues with some guests that expected
extended requests to succeed. Instead, handle extended requests like
normal requests and write zeros to the extended area to signal to the
guest that we don't want to supply any additional certificate data.

Signed-off-by: Tom Dohrmann <erbse.13@gmx.de>

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hypervisor: Add support for legacy I/O port emulation

Legacy port emulation requires reading RAX register from GHCB page for
SEV-SNP guest. This is the major difference between a regular guest and
S

hypervisor: Add support for legacy I/O port emulation

Legacy port emulation requires reading RAX register from GHCB page for
SEV-SNP guest. This is the major difference between a regular guest and
SEV-SNP enabled guest.

Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
Signed-off-by: Muminul Islam <muislam@microsoft.com>

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hypervisor: Add support for handling #HV Doorbell Page

As part of this handling there are 4 different operations:

1. Getting the hypervisor preffered doorbell page GPA.
2. Informing hypervisor abou

hypervisor: Add support for handling #HV Doorbell Page

As part of this handling there are 4 different operations:

1. Getting the hypervisor preffered doorbell page GPA.
2. Informing hypervisor about the doorbell page chosen by the guest
3. Querying the GPA of the doorbell page
4. Clearing the GPA of the doorbell page from hypervisor

Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
Signed-off-by: Muminul Islam <muislam@microsoft.com>

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hypervisor: Add API to complete isolated import

This is the function that needs to be called by the VMM
to inform the MSHV that isolation is complete and inform
PSP about this completion.

Signed-of

hypervisor: Add API to complete isolated import

This is the function that needs to be called by the VMM
to inform the MSHV that isolation is complete and inform
PSP about this completion.

Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
Signed-off-by: Muminul Islam <muislam@microsoft.com>

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