amd64/fpu: Track supervisor state XSAVE components

The amd64/fpu.c xsave_* routines track supported XSAVE components and
features. However, they only track supported user state components, and
there

amd64/fpu: Track supervisor state XSAVE components

The amd64/fpu.c xsave_* routines track supported XSAVE components and
features. However, they only track supported user state components, and
there is currently no way for a consumer to check whether the CPU
supports a supervisor state component. Fix this by saving the supported
supervisor state components, enumerated by CPUID function 0DH,
sub-function 1, in a separate mask.

Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D48466

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x86: Add routines for querying XSAVE feature information

This patch adds several routines that track and expose information
about various XSAVE-related features. More specifically, it adds the
abili

x86: Add routines for querying XSAVE feature information

This patch adds several routines that track and expose information
about various XSAVE-related features. More specifically, it adds the
ability to check whether a given XFEATURE is supported and which XSAVE
extensions are supported. Furthermore, it adds several routines for
calculating the size and offsets within a save area given a XSAVE
feature bitmap.

Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D47394

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sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl s

sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

show more ...

x86: Rename {stop,start}_emulating to fpu_{enable,disable}

While here, centralize the macros in <x86/fpu.h>.

Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D42135

sys: Remove $FreeBSD$: one-line .h pattern

Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/

Revert "linux32: add a hack to avoid redefining the type of the savefpu tag"

This reverts commit 0f6829488ef32142b9ea1c0806fb5ecfe0872c02.
Also it changes the type of md_usr_fpu_save struct mdthread

Revert "linux32: add a hack to avoid redefining the type of the savefpu tag"

This reverts commit 0f6829488ef32142b9ea1c0806fb5ecfe0872c02.
Also it changes the type of md_usr_fpu_save struct mdthread member
to void *, which is what uncovered this trouble. Now the save area
is untyped, but since it is hidden behind accessors, it is not too
significant. Since apparently there are consumers affected outside
the tree, this hack is better than one from the reverted revision.

PR: 258678
Reported by: cy
Reviewed by: cy, kevans, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32060

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linux32: add a hack to avoid redefining the type of the savefpu tag

when compiling in amd64 kernel environment with -m32. This is a temporal
workaround for some future proper (but unclear) fix.

Re

linux32: add a hack to avoid redefining the type of the savefpu tag

when compiling in amd64 kernel environment with -m32. This is a temporal
workaround for some future proper (but unclear) fix.

Reviewed by: jhb, markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D31954

show more ...

amd64/fpu: Track supervisor state XSAVE components

The amd64/fpu.c xsave_* routines track supported XSAVE components and
features. However, they only track supported user state components, and
there

amd64/fpu: Track supervisor state XSAVE components

The amd64/fpu.c xsave_* routines track supported XSAVE components and
features. However, they only track supported user state components, and
there is currently no way for a consumer to check whether the CPU
supports a supervisor state component. Fix this by saving the supported
supervisor state components, enumerated by CPUID function 0DH,
sub-function 1, in a separate mask.

Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D48466

show more ...

x86: Add routines for querying XSAVE feature information

This patch adds several routines that track and expose information
about various XSAVE-related features. More specifically, it adds the
abili

x86: Add routines for querying XSAVE feature information

This patch adds several routines that track and expose information
about various XSAVE-related features. More specifically, it adds the
ability to check whether a given XFEATURE is supported and which XSAVE
extensions are supported. Furthermore, it adds several routines for
calculating the size and offsets within a save area given a XSAVE
feature bitmap.

Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D47394

show more ...

sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl s

sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

show more ...

x86: Rename {stop,start}_emulating to fpu_{enable,disable}

While here, centralize the macros in <x86/fpu.h>.

Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D42135

sys: Remove $FreeBSD$: one-line .h pattern

Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/

Revert "linux32: add a hack to avoid redefining the type of the savefpu tag"

This reverts commit 0f6829488ef32142b9ea1c0806fb5ecfe0872c02.
Also it changes the type of md_usr_fpu_save struct mdthread

Revert "linux32: add a hack to avoid redefining the type of the savefpu tag"

This reverts commit 0f6829488ef32142b9ea1c0806fb5ecfe0872c02.
Also it changes the type of md_usr_fpu_save struct mdthread member
to void *, which is what uncovered this trouble. Now the save area
is untyped, but since it is hidden behind accessors, it is not too
significant. Since apparently there are consumers affected outside
the tree, this hack is better than one from the reverted revision.

PR: 258678
Reported by: cy
Reviewed by: cy, kevans, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32060

show more ...

linux32: add a hack to avoid redefining the type of the savefpu tag

when compiling in amd64 kernel environment with -m32. This is a temporal
workaround for some future proper (but unclear) fix.

Re

linux32: add a hack to avoid redefining the type of the savefpu tag

when compiling in amd64 kernel environment with -m32. This is a temporal
workaround for some future proper (but unclear) fix.

Reviewed by: jhb, markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D31954

show more ...

Merge ^/head r314420 through r314481.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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Merge sync of head

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Improve support for XSAVE with debuggers.
- Dump an NT_X86_XSTATE note if XSAVE is in use. This note is designed
to match what Linux does in that 1) it dumps the entire XSAVE area
including the f

Improve support for XSAVE with debuggers.
- Dump an NT_X86_XSTATE note if XSAVE is in use. This note is designed
to match what Linux does in that 1) it dumps the entire XSAVE area
including the fxsave state, and 2) it stashes a copy of the current
xsave mask in the unused padding between the fxsave state and the
xstate header at the same location used by Linux.
- Teach readelf() to recognize NT_X86_XSTATE notes.
- Change PT_GET/SETXSTATE to take the entire XSAVE state instead of
only the extra portion. This avoids having to always make two
ptrace() calls to get or set the full XSAVE state.
- Add a PT_GET_XSTATE_INFO which returns the length of the current
XSTATE save area (so the size of the buffer needed for PT_GETXSTATE)
and the current XSAVE mask (%xcr0).

Differential Revision: https://reviews.freebsd.org/D1193
Reviewed by: kib
MFC after: 2 weeks

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Merge from head@274682

Sync to HEAD@r272516.

IFC @r271694

SDM rev. 50 defines the use of the next 8 bytes in the xstate header.
It is the compaction bitmask, with the highest bit defining if compact
format of the xsave area is used at all.

Adjust the defin

SDM rev. 50 defines the use of the next 8 bytes in the xstate header.
It is the compaction bitmask, with the highest bit defining if compact
format of the xsave area is used at all.

Adjust the definition of struct xstate_hdr, provide define for bit 63.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week

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MFC