The previous commit made qapi-code-gen.txt define "(top-level)
expression" as either "directive" or "definition". The code still
uses "expression" when it really means "definition". Tidy up.
The previous commit made qapi-code-gen.txt use "object" rather than
"dictionary". The code still uses "dictionary". Tidy up.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-17-armbru@redhat.com>
We document the language by giving patterns of valid JSON objects.
The patterns contain placeholders we don't define anywhere; their
names have to speak for themselves. I guess they do, but I'd prefer a
bit more rigor. Provide a grammar instead, and rework the text
accordingly.
Documentation for QAPI schema conditionals (commit 967c885108,
6cc32b0e14, 87adbbffd4..3e270dcacc) and feature flags (commit
6a8c0b5102) was bolted on. The sections documenting types, commands
and events don't mention them. Section "Features" and "Configuring
the schema" then provide additional syntax for types, commands and
events. I hate that. Fix the sections documenting types, commands
and events to provide accurate syntax, and point to "Features" and
"Configuring the schema" for details.
We talk about "(top-level) expressions other than include and pragma".
Adopt more convenient terminology: a (top-level) expression is either
a directive (include or pragma) or a definition (anything else).
Avoid the terms "dictionary" and "key". Stick to JSON terminology
"object" and "member name" instead.
While there, make spacing more consistent.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-16-armbru@redhat.com>
The introduction to the QAPI schema is somewhat rambling. Rewrite for
clarity.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-15-armbru@redhat.com>
We have some compatibility advice buried in sections "Enumeration
types" and "Struct types". Compatibility is actually about commands
and events. It devolves to the types used there. All kinds of types,
not just enumerations and structs.
Replace the existing advice by a new section "Compatibility
considerations".
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-14-armbru@redhat.com>
[Squash in paragraph on invisible schema changes, as per Eric's review]
Section "QMP/Guest agent schema" starts with a brief introduction,
then subsection "Comments", then subsection "Schema overview" (more
elaborate introduction), and only then talks about schema entities
like types, commands, and so forth.
Subsection "Comments" is long and tiring: almost 500 words, mostly
about doc comments. Move the doc comment part to its own subsection
"Documentation comments" at the very end of "QMP/Guest agent schema".
Subsection "Schema overview" explains naming rules at considerable
length: 250 words. Move this part to its own subsection "Naming rules
and reserved names" right after the subsections on schema entities.
Subsection "Enumeration types" is wedged between "Struct types" and
"Union types". Move it before "Struct types".
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-13-armbru@redhat.com>
For consistency with docs/devel/qapi-code-gen.txt.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-12-armbru@redhat.com>
Absent flat union branches default to the empty struct (since commit
800877bb16 "qapi: allow empty branches in flat unions"). But an
attempt to omit all of them is rejected with "Union 'FOO' has no
branches". Harmless oddity, but it's easy to avoid, so do that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-11-armbru@redhat.com>
[Commit message typo fixed]
A union or alternate without branches makes no sense and doesn't work:
it can't be instantiated. A union or alternate with just one branch
works, but is degenerate. We accept the former, but reject the
latter. Weird. docs/devel/qapi-code-gen.txt doesn't mention the
difference. It claims an alternate definition is "is similar to a
simple union type".
Permit degenerate alternates to make them consistent with unions.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-10-armbru@redhat.com>
We reject empty types with 'boxed': true. We don't really need that
to work, but making it work is actually simpler than rejecting it, so
do that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-9-armbru@redhat.com>
Since the previous commit restricted strings to printable ASCII,
\uXXXX's only use is obfuscation. Drop it.
This leaves \\, \/, \', and \". Since QAPI schema strings are all
names, and names are restricted to ASCII letters, digits, hyphen, and
underscore, none of them is useful.
The latter three have no test coverage. Drop them.
Keep \\ to avoid (more) gratuitous incompatibility with JSON.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-8-armbru@redhat.com>
RFC 8259 on string contents:
All Unicode characters may be placed within the quotation marks,
except for the characters that MUST be escaped: quotation mark,
reverse solidus, and the control characters (U+0000 through
U+001F).
The QAPI schema parser accepts both less and more than JSON: it
accepts only ASCII with \u (less), and accepts control characters
other than LF (new line) unescaped. How it treats unescaped non-ASCII
input differs between Python 2 and Python 3.
Make it accept strictly less: require printable ASCII. Drop support
for \b, \f, \n, \r, \t.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-7-armbru@redhat.com>
Invalid name 'not\\possible' is reported as 'not\possible'. Control
characters (quoted or not) are even more confusing. Mark FIXME.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-6-armbru@redhat.com>
The specification claims "Each expression that isn't an include
directive may be preceded by a documentation block", but the code also
rejects them for pragma directives. The code is correct. Fix the
specification.
The specification reserves member names starting with 'has_', but the
code also reserves name 'u'. Fix the specification.
The specification claims "The string 'max' is not allowed as an enum
value". Untrue. Fix the specification. While there, delete the
naming advice, because it's redundant with the naming rules in section
"Schema overview"
The specification claims "No branch of the union can be named 'max',
as this would collide with the implicit enum". Untrue. Fix the
specification.
The specification claims "It is not allowed to name an event 'MAX',
since the generator also produces a C enumeration of all event names
with a generated _MAX value at the end." Untrue. Fix the
specification.
The specification claims "All branches of the union must be complex
types", but the code permits only struct types. The code is correct.
Fix the specification.
The specification claims a command's return type "must be the string
name of a complex or built-in type, a one-element array containing the
name of a complex or built-in type" unless the command is in pragma
'returns-whitelist'. The code does not permit built-in types. Fix
the specification.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-5-armbru@redhat.com>
Commands and events can define their argument type inline (default) or
by referring to another type ('boxed': true, since commit c818408e44
"qapi: Implement boxed types for commands/events", v2.7.0). The
unboxed inline definition is an (anonymous) struct type. The boxed
type may be a struct, union, or alternate type.
The latter is problematic: docs/interop/qemu-spec.txt requires the
value of the 'data' key to be a json-object, but any non-degenerate
alternate type has at least one branch that isn't.
Fortunately, we haven't made use of alternates in this context outside
tests/. Drop support for them.
QAPISchemaAlternateType.is_empty() is now unused. Drop it, too.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-4-armbru@redhat.com>
check_type() uses @allow_optional only when @value is a dictionary and
@allow_dict is True. All callers that pass allow_dict=True also pass
allow_optional=True.
Therefore, @allow_optional is always True when check_type() uses it.
Drop the redundant parameter.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190913201349.24332-3-armbru@redhat.com>
Pattern *.json also matches the tests/qapi-schema/*.json. Separates
them from the tests/qapi-schema/*.{err,exit,out} in diffs. I hate
that. Change the pattern to match just the "real" QAPI schemata.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190913201349.24332-2-armbru@redhat.com>
In the struct OptsVisitor, the 'repeated_opts' member points to a list
in the 'unprocessed_opts' hash table after the list has been destroyed.
A subsequent call to visit_type_int() references the deleted list.
It results in use-after-free issue reproduced by running the test case
under the Valgrind: valgrind tests/test-opts-visitor.
A new mode ListMode::LM_TRAVERSED is declared to mark the list
traversal completed.
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Message-Id: <1565024586-387112-1-git-send-email-andrey.shinkevich@virtuozzo.com>
visit_next_list() returns non-null on success, null on failure. The
comment's phrasing "until NULL return or error occurs" is needlessly
confusing. Scratch the "or error occurs" part.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190802122325.16520-1-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
- gen15a is called z15
- officially require a 3.15 kernel or later for kvm
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Merge remote-tracking branch 'remotes/borntraeger/tags/s390x-20190923' into staging
- bugfixes in ccw bios
- gen15a is called z15
- officially require a 3.15 kernel or later for kvm
# gpg: Signature made Mon 23 Sep 2019 08:18:32 BST
# gpg: using RSA key 117BBC80B5A61C7C
# gpg: Good signature from "Christian Borntraeger (IBM) <borntraeger@de.ibm.com>" [full]
# Primary key fingerprint: F922 9381 A334 08F9 DBAB FBCA 117B BC80 B5A6 1C7C
* remotes/borntraeger/tags/s390x-20190923:
s390x/cpumodel: Add the z15 name to the description of gen15a
s390x/kvm: Officially require at least kernel 3.15
pc-bios/s390-ccw: Rebuild the s390-netboot.img firmware image
pc-bios/s390-ccw/net: fix a possible memory leak in get_uuid()
pc-bios/s390-ccw: Do not pre-initialize empty array
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Some bug fixes for the watchdog and hopeful the BT tests.
Change the IPMI UUID handling to give the user the ability to set it or
not have it.
Add a PCI interface.
Add an SMBus interfaces.
-corey
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Merge remote-tracking branch 'remotes/cminyard/tags/ipmi-for-release-2019-09-20' into staging
ipmi: Some bug fixes and new interfaces
Some bug fixes for the watchdog and hopeful the BT tests.
Change the IPMI UUID handling to give the user the ability to set it or
not have it.
Add a PCI interface.
Add an SMBus interfaces.
-corey
# gpg: Signature made Fri 20 Sep 2019 20:11:21 BST
# gpg: using RSA key FD0D5CE67CE0F59A6688268661F38C90919BFF81
# gpg: Good signature from "Corey Minyard <cminyard@mvista.com>" [unknown]
# gpg: aka "Corey Minyard <minyard@acm.org>" [unknown]
# gpg: aka "Corey Minyard <corey@minyard.net>" [unknown]
# gpg: aka "Corey Minyard <minyard@mvista.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: FD0D 5CE6 7CE0 F59A 6688 2686 61F3 8C90 919B FF81
* remotes/cminyard/tags/ipmi-for-release-2019-09-20:
pc: Add an SMB0 ACPI device to q35
ipmi: Fix SSIF ACPI handling to use the right CRS
acpi: Add i2c serial bus CRS handling
ipmi: Add an SMBus IPMI interface
ipmi: Add PCI IPMI interfaces
smbios:ipmi: Ignore IPMI devices with no fwinfo function
ipmi: Allow a size value to be passed for I/O space
ipmi: Split out BT-specific code from ISA BT code
ipmi: Split out KCS-specific code from ISA KCS code
ipmi: Add a UUID device property
qdev: Add a no default uuid property
tests:ipmi: Fix IPMI BT tests
ipmi: Generate an interrupt on watchdog pretimeout expiry
ipmi: Fix the get watchdog command
ipmi: Fix watchdog NMI handling
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Let's add a test that especially verifies that no data will be touched
in case we cross page boundaries and one page access triggers a fault.
Before the fault-safe handling fixes, the test failes with:
TEST mvc on s390x
data modified during a fault
make[2]: *** [../Makefile.target:116: run-mvc] Error 1
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Let's add the simple test based on the example from the PoP.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Each operand can have a maximum length of 16. Make sure to prepare all
reads/writes before writing.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Access at most single pages and document why. Using the access helpers
might over-indicate watchpoints within the same page, I guess we can
live with that.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We can process a maximum of 256 bytes, crossing two pages.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We can process a maximum of 256 bytes, crossing two pages.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We can process a maximum of 256 bytes, crossing two pages. Calculate the
accessed range upfront - src is accessed right-to-left.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We can process a maximum of 256 bytes, crossing two pages.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We can process a maximum of 256 bytes, crossing two pages. While at it,
increment the length once.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We can process a maximum of 256 bytes, crossing two pages.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
The last remaining bit is padding with two bytes.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
The last remaining bit for MVC is handling destructive overlaps in a
fault-safe way.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
As we are moving between address spaces, we can use access_memmove()
without checking for destructive overlaps (especially of real storage
locations):
"Each storage operand is processed left to right. The
storage-operand-consistency rules are the same as
for MOVE (MVC), except that when the operands
overlap in real storage, the use of the common real-
storage locations is not necessarily recognized."
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Replace fast_memmove() variants by access_memmove() variants, that
first try to probe access to all affected pages (maximum is two pages).
Introduce access_get_byte()/access_set_byte(). We might be able to speed
up memmove in special cases even further (do single-byte access, use
memmove() for remaining bytes in page), however, we'll skip that for now.
In MVCOS, simply always call access_memmove_as() and drop the TODO
about LAP. LAP is already handled in the MMU.
Get rid of adj_len_to_page(), which is now unused.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Replace fast_memset() by access_memset(), that first tries to probe
access to all affected pages (maximum is two). We'll use the same
mechanism for other types of accesses soon.
Only in very rare cases (especially TLB_NOTDIRTY), we'll have to
fallback to ld/st helpers. Try to speed up that case as suggested by
Richard.
We'll rework most involved handlers soon to do all accesses via new
fault-safe helpers, especially MVC.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Although we basically ignore the index all the time for CONFIG_USER_ONLY,
let's simply skip all the checks and always return MMU_USER_IDX in
cpu_mmu_index() and get_mem_index().
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
24 and 31-bit address space handling is wrong when it comes to storing
back the addresses to the register.
While at it, read gprs 0 implicitly.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Bit position 32-55 of general register 0 must be zero.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
... and don't perform any move in case the length is zero.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Triggered by a review comment from Richard, also MVCOS has a 32-bit
length in 24/31-bit addressing mode. Add a new helper.
Rename wrap_length() to wrap_length31().
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Let's stay within single pages.
... and indicate cc=3 in case there is work remaining. Keep unicode
padding simple.
While reworking, properly wrap the addresses.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We have to mask of any unused bits. While at it, document what exactly is
missing.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Perform the checks documented in the PoP.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Let's use the new helper, that also detects destructive overlaps when
wrapping.
We'll make the remaining code (e.g., fast_memmove()) aware of wrapping
later.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Let's increment the length once.
While at it, cleanup the comment. The memset() example is given as a
programming note in the PoP, so drop the description.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Process max 4k bytes at a time, writing back registers between the
accesses. The instruction is interruptible.
"For operands longer than 2K bytes, access exceptions are not
recognized for locations more than 2K bytes beyond the current location
being processed."
Note that on z/Architecture, 2k vs. 4k access cannot get differentiated as
long as pages are not crossed. This seems to be a leftover from ESA/390.
Simply stay within single pages.
MVCL handling is quite different than MVCLE/MVCLU handling, so split up
the handlers.
Defer interrupt handling, as that will require more thought, add a TODO
for that.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We'll have to zero-out unused bit positions, so make sure to write the
addresses back.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
We have to zero out unused bits in 24 and 31-bit addressing mode.
Provide a new helper.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Markus Armbruster
Andrey Shinkevich
Peter Maydell
David Hildenbrand