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Merge tag 'kvmarm-5.19' of git://git.kernel.org/pub/scm/linux/kernel/…
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KVM/arm64 updates for 5.19

- Add support for the ARMv8.6 WFxT extension

- Guard pages for the EL2 stacks

- Trap and emulate AArch32 ID registers to hide unsupported features

- Ability to select and save/restore the set of hypercalls exposed
  to the guest

- Support for PSCI-initiated suspend in collaboration with userspace

- GICv3 register-based LPI invalidation support

- Move host PMU event merging into the vcpu data structure

- GICv3 ITS save/restore fixes

- The usual set of small-scale cleanups and fixes

[Due to the conflict, KVM_SYSTEM_EVENT_SEV_TERM is relocated
 from 4 to 6. - Paolo]
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@bonzini
bonzini committed May 25, 2022
2 parents 825be3b + 5c0ad55 commit 47e8eec
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4 changes: 4 additions & 0 deletions .mailmap
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Expand Up @@ -391,6 +391,10 @@ Uwe Kleine-König <[email protected]>
Uwe Kleine-König <[email protected]>
Uwe Kleine-König <[email protected]>
Valdis Kletnieks <[email protected]>
Vasily Averin <[email protected]> <[email protected]>
Vasily Averin <[email protected]> <[email protected]>
Vasily Averin <[email protected]> <[email protected]>
Vasily Averin <[email protected]> <[email protected]>
Vinod Koul <[email protected]> <[email protected]>
Vinod Koul <[email protected]> <[email protected]>
Vinod Koul <[email protected]> <[email protected]>
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48 changes: 26 additions & 22 deletions Documentation/ABI/testing/sysfs-class-firmware-attributes
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Expand Up @@ -116,7 +116,7 @@ Description:
<value>[ForceIf:<attribute>=<value>]
<value>[ForceIfNot:<attribute>=<value>]

For example:
For example::

LegacyOrom/dell_value_modifier has value:
Disabled[ForceIf:SecureBoot=Enabled]
Expand Down Expand Up @@ -212,7 +212,7 @@ Description:
the next boot.

Lenovo specific class extensions
------------------------------
--------------------------------

On Lenovo systems the following additional settings are available:

Expand Down Expand Up @@ -246,9 +246,7 @@ Description:
that is being referenced (e.g hdd0, hdd1 etc)
This attribute defaults to device 0.

certificate:
signature:
save_signature:
certificate, signature, save_signature:
These attributes are used for certificate based authentication. This is
used in conjunction with a signing server as an alternative to password
based authentication.
Expand All @@ -257,22 +255,27 @@ Description:
The attributes can be displayed to check the stored value.

Some usage examples:
Installing a certificate to enable feature:
echo <supervisor password > authentication/Admin/current_password
echo <signed certificate> > authentication/Admin/certificate

Updating the installed certificate:
echo <signature> > authentication/Admin/signature
echo <signed certificate> > authentication/Admin/certificate
Installing a certificate to enable feature::

echo "supervisor password" > authentication/Admin/current_password
echo "signed certificate" > authentication/Admin/certificate

Updating the installed certificate::

echo "signature" > authentication/Admin/signature
echo "signed certificate" > authentication/Admin/certificate

Removing the installed certificate:
echo <signature> > authentication/Admin/signature
echo '' > authentication/Admin/certificate
Removing the installed certificate::

Changing a BIOS setting:
echo <signature> > authentication/Admin/signature
echo <save signature> > authentication/Admin/save_signature
echo Enable > attribute/PasswordBeep/current_value
echo "signature" > authentication/Admin/signature
echo "" > authentication/Admin/certificate

Changing a BIOS setting::

echo "signature" > authentication/Admin/signature
echo "save signature" > authentication/Admin/save_signature
echo Enable > attribute/PasswordBeep/current_value

You cannot enable certificate authentication if a supervisor password
has not been set.
Expand All @@ -288,9 +291,10 @@ Description:
certificate_to_password:
Write only attribute used to switch from certificate based authentication
back to password based.
Usage:
echo <signature> > authentication/Admin/signature
echo <password> > authentication/Admin/certificate_to_password
Usage::

echo "signature" > authentication/Admin/signature
echo "password" > authentication/Admin/certificate_to_password


What: /sys/class/firmware-attributes/*/attributes/pending_reboot
Expand Down Expand Up @@ -345,7 +349,7 @@ Description:

# echo "factory" > /sys/class/firmware-attributes/*/device/attributes/reset_bios
# cat /sys/class/firmware-attributes/*/device/attributes/reset_bios
# builtinsafe lastknowngood [factory] custom
builtinsafe lastknowngood [factory] custom

Note that any changes to this attribute requires a reboot
for changes to take effect.
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18 changes: 10 additions & 8 deletions Documentation/ABI/testing/sysfs-driver-intel_sdsi
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Expand Up @@ -13,17 +13,19 @@ Description:
Should the operation fail, one of the following error codes
may be returned:

========== =====
Error Code Cause
---------- -----
EIO General mailbox failure. Log may indicate cause.
EBUSY Mailbox is owned by another agent.
EPERM SDSI capability is not enabled in hardware.
EPROTO Failure in mailbox protocol detected by driver.
========== =====
EIO General mailbox failure. Log may indicate cause.
EBUSY Mailbox is owned by another agent.
EPERM SDSI capability is not enabled in hardware.
EPROTO Failure in mailbox protocol detected by driver.
See log for details.
EOVERFLOW For provision commands, the size of the data
EOVERFLOW For provision commands, the size of the data
exceeds what may be written.
ESPIPE Seeking is not allowed.
ETIMEDOUT Failure to complete mailbox transaction in time.
ESPIPE Seeking is not allowed.
ETIMEDOUT Failure to complete mailbox transaction in time.
========== =====

What: /sys/bus/auxiliary/devices/intel_vsec.sdsi.X/guid
Date: Feb 2022
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5 changes: 3 additions & 2 deletions Documentation/ABI/testing/sysfs-fs-erofs
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Expand Up @@ -9,8 +9,9 @@ Description: Shows all enabled kernel features.
What: /sys/fs/erofs/<disk>/sync_decompress
Date: November 2021
Contact: "Huang Jianan" <[email protected]>
Description: Control strategy of sync decompression
Description: Control strategy of sync decompression:

- 0 (default, auto): enable for readpage, and enable for
readahead on atomic contexts only,
readahead on atomic contexts only.
- 1 (force on): enable for readpage and readahead.
- 2 (force off): disable for all situations.
2 changes: 2 additions & 0 deletions Documentation/arm64/cpu-feature-registers.rst
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Expand Up @@ -290,6 +290,8 @@ infrastructure:
+------------------------------+---------+---------+
| RPRES | [7-4] | y |
+------------------------------+---------+---------+
| WFXT | [3-0] | y |
+------------------------------+---------+---------+


Appendix I: Example
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37 changes: 37 additions & 0 deletions Documentation/arm64/elf_hwcaps.rst
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Expand Up @@ -264,6 +264,43 @@ HWCAP2_MTE3
Functionality implied by ID_AA64PFR1_EL1.MTE == 0b0011, as described
by Documentation/arm64/memory-tagging-extension.rst.

HWCAP2_SME

Functionality implied by ID_AA64PFR1_EL1.SME == 0b0001, as described
by Documentation/arm64/sme.rst.

HWCAP2_SME_I16I64

Functionality implied by ID_AA64SMFR0_EL1.I16I64 == 0b1111.

HWCAP2_SME_F64F64

Functionality implied by ID_AA64SMFR0_EL1.F64F64 == 0b1.

HWCAP2_SME_I8I32

Functionality implied by ID_AA64SMFR0_EL1.I8I32 == 0b1111.

HWCAP2_SME_F16F32

Functionality implied by ID_AA64SMFR0_EL1.F16F32 == 0b1.

HWCAP2_SME_B16F32

Functionality implied by ID_AA64SMFR0_EL1.B16F32 == 0b1.

HWCAP2_SME_F32F32

Functionality implied by ID_AA64SMFR0_EL1.F32F32 == 0b1.

HWCAP2_SME_FA64

Functionality implied by ID_AA64SMFR0_EL1.FA64 == 0b1.

HWCAP2_WFXT

Functionality implied by ID_AA64ISAR2_EL1.WFXT == 0b0010.

4. Unused AT_HWCAP bits
-----------------------

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1 change: 1 addition & 0 deletions Documentation/arm64/index.rst
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Expand Up @@ -21,6 +21,7 @@ ARM64 Architecture
perf
pointer-authentication
silicon-errata
sme
sve
tagged-address-abi
tagged-pointers
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4 changes: 2 additions & 2 deletions Documentation/arm64/memory-tagging-extension.rst
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Expand Up @@ -228,10 +228,10 @@ Core dump support
-----------------

The allocation tags for user memory mapped with ``PROT_MTE`` are dumped
in the core file as additional ``PT_ARM_MEMTAG_MTE`` segments. The
in the core file as additional ``PT_AARCH64_MEMTAG_MTE`` segments. The
program header for such segment is defined as:

:``p_type``: ``PT_ARM_MEMTAG_MTE``
:``p_type``: ``PT_AARCH64_MEMTAG_MTE``
:``p_flags``: 0
:``p_offset``: segment file offset
:``p_vaddr``: segment virtual address, same as the corresponding
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