* [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats
@ 2018-04-12 18:26 Ian Jackson
2018-04-12 18:26 ` [PATCH 1/5] docs/parse-support-md: internals: Introduce docref_a Ian Jackson
` (6 more replies)
0 siblings, 7 replies; 15+ messages in thread
From: Ian Jackson @ 2018-04-12 18:26 UTC (permalink / raw)
To: xen-devel; +Cc: Juergen Gross, Lars Kurth, George Dunlap
The new support matrix output puts a [*] after each entry in the
support matrix in many cases where the linked-to text is simply a
longer description of the feature.
Remedy this by distinguishing text which expands on a feature
description from text which qualifies its support status.
There are 3 patches to processing machinery, followed by two patches
to SUPPORT.md - one to make the distinction, throughout, and one to
document it.
The patches to SUPPORT.md would ideally go to 4.10 too.
1/5 docs/parse-support-md: internals: Introduce docref_a
2/5 docs/parse-support-md: internals: Rename HasText to
3/5 SUPPORT.md, support matrix: Treat commentary before
4/5 SUPPORT.md: Move descriptions up before Status info
5/5 SUPPORT.md: Document the new text ordering rule
Ian.
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^ permalink raw reply [flat|nested] 15+ messages in thread
* [PATCH 1/5] docs/parse-support-md: internals: Introduce docref_a
2018-04-12 18:26 [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
@ 2018-04-12 18:26 ` Ian Jackson
2018-04-12 18:26 ` [PATCH 2/5] docs/parse-support-md: internals: Rename HasText to HasCaveat Ian Jackson
` (5 subsequent siblings)
6 siblings, 0 replies; 15+ messages in thread
From: Ian Jackson @ 2018-04-12 18:26 UTC (permalink / raw)
To: xen-devel; +Cc: Juergen Gross, Lars Kurth, Ian Jackson, George Dunlap
No functional change.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
docs/parse-support-md | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/docs/parse-support-md b/docs/parse-support-md
index decda33..5bf8405 100755
--- a/docs/parse-support-md
+++ b/docs/parse-support-md
@@ -318,6 +318,12 @@ sub o { print @_ or die $!; }
our @pending_headings;
+sub docref_a ($$) {
+ my ($i, $realsect) = @_;
+ return sprintf '<a href="%s#%s">',
+ $version_urls[$i], $realsect->{Anchor};
+}
+
sub write_output_row ($) {
my ($sectnode) = @_;
# print STDERR 'WOR ', Dumper($d, $sectnode);
@@ -364,8 +370,8 @@ sub write_output_row ($) {
&& $sectnode->{RealSect}{Anchor}) {
my $rows = $sectnode->{RealSect}{Rows};
$nextcell = sprintf '<td rowspan=%d>', $rows;
- $nextcell .= sprintf '<a href="%s#%s">[*]</a>',
- $version_urls[$i], $sectnode->{RealSect}{Anchor};
+ $nextcell .= docref_a $i, $sectnode->{RealSect};
+ $nextcell .= '[*]</a>';
$nextcell .= '</td>';
$colspan = '';
}
--
2.1.4
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^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH 2/5] docs/parse-support-md: internals: Rename HasText to HasCaveat
2018-04-12 18:26 [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
2018-04-12 18:26 ` [PATCH 1/5] docs/parse-support-md: internals: Introduce docref_a Ian Jackson
@ 2018-04-12 18:26 ` Ian Jackson
2018-04-12 18:26 ` [PATCH 3/5] SUPPORT.md, support matrix: Treat commentary before status as description Ian Jackson
` (4 subsequent siblings)
6 siblings, 0 replies; 15+ messages in thread
From: Ian Jackson @ 2018-04-12 18:26 UTC (permalink / raw)
To: xen-devel; +Cc: Juergen Gross, Lars Kurth, Ian Jackson, George Dunlap
No functional change.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
docs/parse-support-md | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/docs/parse-support-md b/docs/parse-support-md
index 5bf8405..6953930 100755
--- a/docs/parse-support-md
+++ b/docs/parse-support-md
@@ -34,7 +34,7 @@ our $toplevel_sectlist = new_sectlist();
# $sectlist->{KEY}{Children} = a further $sectlist
# $sectlist->{KEY}{Key} = KEY
# $sectlist->{KEY}{RealSect} = containing real section in @insections, so
-# $sectlist->{KEY}{RealSect}{HasText}[VI] = trueish iff there was a Para
+# $sectlist->{KEY}{RealSect}{HasCaveat}[VI] = trueish iff other in a Para
# $sectlist->{KEY}{RealSect}{Anchor} = value for < id="" > in the pandoc html
# A $sectnode represents a single section from the original markdown
# document. Its subsections are in Children.
@@ -57,7 +57,7 @@ our @insections;
# $insections[]{Headline} = markdown content
# these next are only defined for real sections, not Status elements
# $insections[]{Anchor} = string
-# $insections[]{HasText} = array, $sectlist->{HasText} will refer to this
+# $insections[]{HasCaveat} = array, $sectlist->{HasCaveat} will refer to this
our $had_unknown;
# adding new variable ? it must be reset in r_toplevel
@@ -77,14 +77,14 @@ sub ri_Header {
Key => $id,
Anchor => $id,
Headline => $hl,
- HasText => [],
+ HasCaveat => [],
};
#print STDERR Dumper(\@insections);
}
sub ri_Para {
if (@insections) {
- $insections[$#insections]{HasText}[$version_index] = 1;
+ $insections[$#insections]{HasCaveat}[$version_index] = 1;
}
};
@@ -366,7 +366,7 @@ sub write_output_row ($) {
my $nextcell = '';
if (!defined $colspan) { # first row of this RealSect
$colspan= ' colspan="2"';
- if ($sectnode->{RealSect}{HasText}[$i] && $st
+ if ($sectnode->{RealSect}{HasCaveat}[$i] && $st
&& $sectnode->{RealSect}{Anchor}) {
my $rows = $sectnode->{RealSect}{Rows};
$nextcell = sprintf '<td rowspan=%d>', $rows;
--
2.1.4
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https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH 3/5] SUPPORT.md, support matrix: Treat commentary before status as description
2018-04-12 18:26 [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
2018-04-12 18:26 ` [PATCH 1/5] docs/parse-support-md: internals: Introduce docref_a Ian Jackson
2018-04-12 18:26 ` [PATCH 2/5] docs/parse-support-md: internals: Rename HasText to HasCaveat Ian Jackson
@ 2018-04-12 18:26 ` Ian Jackson
2018-04-12 18:26 ` [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info Ian Jackson
` (3 subsequent siblings)
6 siblings, 0 replies; 15+ messages in thread
From: Ian Jackson @ 2018-04-12 18:26 UTC (permalink / raw)
To: xen-devel; +Cc: Juergen Gross, Lars Kurth, Ian Jackson, George Dunlap
Running text in feature sections in the markdown document currently
might be (i) a caveat, qualifying or clarifying the support statement
(ii) a plain description of the feature.
Caveats can be version-specific and deserve the [*] annotation in the
relevant feature matrix cell. They must link to SUPPORT.html for the
specific version.
Descriptions are not version specific. In that case the [*]
annotation is visusal noise. Rather, it is better to make a hyperlink
out of the text which is being expanded on. The hyperlink can point
to any appropriate version.
There is a question about how to notate this distinction in
SUPPORT.md. After IRL discussion with George and Lars I propose that
we should put text which helps describe a feature (ie, which expands
on a section heading) after the heading but before the Status
indications; whereas, caveats and supplementary information about
the actual status, should follow the Status block.
This patch implements this distinction in the support matrix
generator. Only paragraphs containing _only_ italic content count as
descriptive; anything else is treated as a caveat.
In the code:
* Add a new entry to RealSect, HasDescription
* When parsing, track whether we are before or after the first Status
block in a new variable $has_feature.
* In ri_Para, set HasDescription set to the input document index
when we encounter text before the first feature.
* When writing a `heading' (ie, the table cell for a feature name)
look for HasDescription and make an appropriate hyperlink.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
docs/parse-support-md | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/docs/parse-support-md b/docs/parse-support-md
index 6953930..653d216 100755
--- a/docs/parse-support-md
+++ b/docs/parse-support-md
@@ -35,6 +35,7 @@ our $toplevel_sectlist = new_sectlist();
# $sectlist->{KEY}{Key} = KEY
# $sectlist->{KEY}{RealSect} = containing real section in @insections, so
# $sectlist->{KEY}{RealSect}{HasCaveat}[VI] = trueish iff other in a Para
+# $sectlist->{KEY}{RealSect}{HasDescription} = VI for some Emph in Para
# $sectlist->{KEY}{RealSect}{Anchor} = value for < id="" > in the pandoc html
# A $sectnode represents a single section from the original markdown
# document. Its subsections are in Children.
@@ -58,8 +59,10 @@ our @insections;
# these next are only defined for real sections, not Status elements
# $insections[]{Anchor} = string
# $insections[]{HasCaveat} = array, $sectlist->{HasCaveat} will refer to this
+# $insections[]{HasDescription} VI, likewise
our $had_unknown;
+our $had_feature;
# adding new variable ? it must be reset in r_toplevel
#---------- parsing ----------
@@ -78,13 +81,20 @@ sub ri_Header {
Anchor => $id,
Headline => $hl,
HasCaveat => [],
+ HasDescription => undef,
};
#print STDERR Dumper(\@insections);
+ $had_feature = 0;
}
sub ri_Para {
- if (@insections) {
- $insections[$#insections]{HasCaveat}[$version_index] = 1;
+ return unless @insections;
+ my $insection = $insections[$#insections];
+
+ if ($had_feature) {
+ $insection->{HasCaveat}[$version_index] = 1;
+ } else {
+ $insection->{HasDescription} //= $version_index;
}
};
@@ -92,6 +102,8 @@ sub parse_feature_entry ($) {
my ($value) = @_;
die unless @insections;
+ $had_feature = 1;
+
my $sectnode;
my $realsect;
foreach my $s (@insections) {
@@ -183,6 +195,7 @@ sub r_toplevel ($) {
@insections = ();
$had_unknown = undef;
+ $had_feature = undef;
foreach my $e (@$i) {
next unless ref $e eq 'ARRAY';
@@ -346,7 +359,14 @@ sub write_output_row ($) {
$span->('col', $maxdepth - $heading->{Depth} + 1)
if !%{ $heading->{Children} };
o(' align="left">');
+ my $end_a = '';
+ my $desc_i = $heading->{RealSect}{HasDescription};
+ if (defined $desc_i) {
+ o(docref_a $desc_i, $heading->{RealSect});
+ $end_a= '</a>';
+ }
o($heading->{Headline});
+ o($end_a);
o('</th>');
}
if (%{ $sectnode->{Children} }) {
--
2.1.4
_______________________________________________
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https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info
2018-04-12 18:26 [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
` (2 preceding siblings ...)
2018-04-12 18:26 ` [PATCH 3/5] SUPPORT.md, support matrix: Treat commentary before status as description Ian Jackson
@ 2018-04-12 18:26 ` Ian Jackson
2018-04-13 11:31 ` Lars Kurth
2018-04-12 18:26 ` [PATCH 5/5] SUPPORT.md: Document the new text ordering rule Ian Jackson
` (2 subsequent siblings)
6 siblings, 1 reply; 15+ messages in thread
From: Ian Jackson @ 2018-04-12 18:26 UTC (permalink / raw)
To: xen-devel; +Cc: Juergen Gross, Lars Kurth, Ian Jackson, George Dunlap
This turns all the things which were treated as caveats, but which
don't need to be footnoted in the matrix, into descriptions.
For the benefit of the support matrix generator, this patch (or a
version of it) should be backported to 4.10.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
SUPPORT.md | 213 ++++++++++++++++++++++++++++++++-----------------------------
1 file changed, 111 insertions(+), 102 deletions(-)
diff --git a/SUPPORT.md b/SUPPORT.md
index 264b23f..5ae84cf 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -58,32 +58,29 @@ for the definitions of the support status levels etc.
### ARM/GICv3 ITS
- Status: Experimental
-
Extension to the GICv3 interrupt controller to support MSI.
+ Status: Experimental
+
## Guest Type
### x86/PV
- Status: Supported
-
Traditional Xen PV guest
No hardware requirements
-### x86/HVM
+ Status: Supported
- Status, domU: Supported
+### x86/HVM
Fully virtualised guest using hardware virtualisation extensions
Requires hardware virtualisation support (Intel VMX / AMD SVM)
-### x86/PVH
-
Status, domU: Supported
- Status, dom0: Experimental
+
+### x86/PVH
PVH is a next-generation paravirtualized mode
designed to take advantage of hardware virtualization support when possible.
@@ -93,12 +90,15 @@ Requires hardware virtualisation support (Intel VMX / AMD SVM).
Dom0 support requires an IOMMU (Intel VT-d / AMD IOMMU).
-### ARM
+ Status, domU: Supported
+ Status, dom0: Experimental
- Status: Supported
+### ARM
ARM only has one guest type at the moment
+ Status: Supported
+
## Toolstack
### xl
@@ -107,12 +107,12 @@ ARM only has one guest type at the moment
### Direct-boot kernel image format
+Format which the toolstack accepts for direct-boot kernels
+
Supported, x86: bzImage, ELF
Supported, ARM32: zImage
Supported, ARM64: Image
-Format which the toolstack accepts for direct-boot kernels
-
### Dom0 init support for xl
Status, SysV: Supported
@@ -121,10 +121,10 @@ Format which the toolstack accepts for direct-boot kernels
### JSON output support for xl
- Status: Experimental
-
Output of information in machine-parseable JSON format
+ Status: Experimental
+
### Open vSwitch integration for xl
Status, Linux: Supported
@@ -157,17 +157,18 @@ Output of information in machine-parseable JSON format
### Hypervisor 'debug keys'
- Status: Supported, not security supported
-
These are functions triggered either from the host serial console,
or via the xl 'debug-keys' command,
which cause Xen to dump various hypervisor state to the console.
+ Status: Supported, not security supported
+
### Hypervisor synchronous console output (sync_console)
+Xen command-line flag to force synchronous console output.
+
Status: Supported, not security supported
-Xen command-line flag to force synchronous console output.
Useful for debugging, but not suitable for production environments
due to incurred overhead.
@@ -179,56 +180,54 @@ Debugger to debug ELF guests
### Soft-reset for PV guests
- Status: Supported
-
Soft-reset allows a new kernel to start 'from scratch' with a fresh VM state,
but with all the memory from the previous state of the VM intact.
This is primarily designed to allow "crash kernels",
which can do core dumps of memory to help with debugging in the event of a crash.
-### xentrace
+ Status: Supported
- Status, x86: Supported
+### xentrace
Tool to capture Xen trace buffer data
-### gcov
+ Status, x86: Supported
- Status: Supported, Not security supported
+### gcov
Export hypervisor coverage data suitable for analysis by gcov or lcov.
+ Status: Supported, Not security supported
+
## Memory Management
### Dynamic memory control
- Status: Supported
-
Allows a guest to add or remove memory after boot-time.
This is typically done by a guest kernel agent known as a "balloon driver".
-### Populate-on-demand memory
+ Status: Supported
- Status, x86 HVM: Supported
+### Populate-on-demand memory
This is a mechanism that allows normal operating systems with only a balloon driver
to boot with memory < maxmem.
-### Memory Sharing
+ Status, x86 HVM: Supported
- Status, x86 HVM: Expermental
+### Memory Sharing
Allow sharing of identical pages between guests
-### Memory Paging
+ Status, x86 HVM: Expermental
- Status, x86 HVM: Experimenal
+### Memory Paging
Allow pages belonging to guests to be paged to disk
-### Transcendent Memory
+ Status, x86 HVM: Experimenal
- Status: Experimental
+### Transcendent Memory
Transcendent Memory (tmem) allows the creation of hypervisor memory pools
which guests can use to store memory
@@ -236,96 +235,100 @@ rather than caching in its own memory or swapping to disk.
Having these in the hypervisor
can allow more efficient aggregate use of memory across VMs.
-### Alternative p2m
+ Status: Experimental
- Status, x86 HVM: Tech Preview
- Status, ARM: Tech Preview
+### Alternative p2m
Allows external monitoring of hypervisor memory
by maintaining multiple physical to machine (p2m) memory mappings.
+ Status, x86 HVM: Tech Preview
+ Status, ARM: Tech Preview
+
## Resource Management
### CPU Pools
- Status: Supported
-
Groups physical cpus into distinct groups called "cpupools",
with each pool having the capability
of using different schedulers and scheduling properties.
-### Credit Scheduler
-
Status: Supported
+### Credit Scheduler
+
A weighted proportional fair share virtual CPU scheduler.
This is the default scheduler.
-### Credit2 Scheduler
-
Status: Supported
+### Credit2 Scheduler
+
A general purpose scheduler for Xen,
designed with particular focus on fairness, responsiveness, and scalability
-### RTDS based Scheduler
+ Status: Supported
- Status: Experimental
+### RTDS based Scheduler
A soft real-time CPU scheduler
built to provide guaranteed CPU capacity to guest VMs on SMP hosts
+ Status: Experimental
+
### ARINC653 Scheduler
+A periodically repeating fixed timeslice scheduler.
+
Status: Supported
-A periodically repeating fixed timeslice scheduler.
Currently only single-vcpu domains are supported.
### Null Scheduler
- Status: Experimental
-
A very simple, very static scheduling policy
that always schedules the same vCPU(s) on the same pCPU(s).
It is designed for maximum determinism and minimum overhead
on embedded platforms.
-### NUMA scheduler affinity
+ Status: Experimental
- Status, x86: Supported
+### NUMA scheduler affinity
Enables NUMA aware scheduling in Xen
+ Status, x86: Supported
+
## Scalability
### Super page support
- Status, x86 HVM/PVH, HAP: Supported
- Status, x86 HVM/PVH, Shadow, 2MiB: Supported
- Status, ARM: Supported
-
NB that this refers to the ability of guests
to have higher-level page table entries point directly to memory,
improving TLB performance.
On ARM, and on x86 in HAP mode,
the guest has whatever support is enabled by the hardware.
+
+This feature is independent
+of the ARM "page granularity" feature (see below).
+
+ Status, x86 HVM/PVH, HAP: Supported
+ Status, x86 HVM/PVH, Shadow, 2MiB: Supported
+ Status, ARM: Supported
+
On x86 in shadow mode, only 2MiB (L2) superpages are available;
furthermore, they do not have the performance characteristics
of hardware superpages.
-Also note is feature independent
-of the ARM "page granularity" feature (see below).
-
### x86/PVHVM
- Status: Supported
-
This is a useful label for a set of hypervisor features
which add paravirtualized functionality to HVM guests
for improved performance and scalability.
This includes exposing event channels to HVM guests.
+ Status: Supported
+
## High Availability and Fault Tolerance
### Remus Fault Tolerance
@@ -338,38 +341,38 @@ This includes exposing event channels to HVM guests.
### x86/vMCE
- Status: Supported
-
Forward Machine Check Exceptions to appropriate guests
+ Status: Supported
+
## Virtual driver support, guest side
### Blkfront
+Guest-side driver capable of speaking the Xen PV block protocol
+
Status, Linux: Supported
Status, FreeBSD: Supported, Security support external
Status, NetBSD: Supported, Security support external
Status, OpenBSD: Supported, Security support external
Status, Windows: Supported
-Guest-side driver capable of speaking the Xen PV block protocol
-
### Netfront
+Guest-side driver capable of speaking the Xen PV networking protocol
+
Status, Linux: Supported
Status, FreeBSD: Supported, Security support external
Status, NetBSD: Supported, Security support external
Status, OpenBSD: Supported, Security support external
Status, Windows: Supported
-Guest-side driver capable of speaking the Xen PV networking protocol
-
### PV Framebuffer (frontend)
- Status, Linux (xen-fbfront): Supported
-
Guest-side driver capable of speaking the Xen PV Framebuffer protocol
+ Status, Linux (xen-fbfront): Supported
+
### PV Console (frontend)
Status, Linux (hvc_xen): Supported
@@ -381,11 +384,11 @@ Guest-side driver capable of speaking the Xen PV console protocol
### PV keyboard (frontend)
- Status, Linux (xen-kbdfront): Supported
-
Guest-side driver capable of speaking the Xen PV keyboard protocol.
Note that the "keyboard protocol" includes mouse / pointer support as well.
+ Status, Linux (xen-kbdfront): Supported
+
### PV USB (frontend)
Status, Linux: Supported
@@ -399,22 +402,22 @@ there is currently no xl support.
### PV TPM (frontend)
- Status, Linux (xen-tpmfront): Tech Preview
-
Guest-side driver capable of speaking the Xen PV TPM protocol
-### PV 9pfs frontend
+ Status, Linux (xen-tpmfront): Tech Preview
- Status, Linux: Tech Preview
+### PV 9pfs frontend
Guest-side driver capable of speaking the Xen 9pfs protocol
-### PVCalls (frontend)
-
Status, Linux: Tech Preview
+### PVCalls (frontend)
+
Guest-side driver capable of making pv system calls
+ Status, Linux: Tech Preview
+
## Virtual device support, host side
For host-side virtual device support,
@@ -423,6 +426,8 @@ unless otherwise noted.
### Blkback
+Host-side implementations of the Xen PV block protocol.
+
Status, Linux (xen-blkback): Supported
Status, QEMU (xen_disk), raw format: Supported
Status, QEMU (xen_disk), qcow format: Supported
@@ -433,42 +438,41 @@ unless otherwise noted.
Status, Blktap2, raw format: Deprecated
Status, Blktap2, vhd format: Deprecated
-Host-side implementations of the Xen PV block protocol.
Backends only support raw format unless otherwise specified.
### Netback
+Host-side implementations of Xen PV network protocol
+
Status, Linux (xen-netback): Supported
Status, FreeBSD (netback): Supported, Security support external
Status, NetBSD (xennetback): Supported, Security support external
-Host-side implementations of Xen PV network protocol
-
### PV Framebuffer (backend)
- Status, QEMU: Supported
-
Host-side implementation of the Xen PV framebuffer protocol
-### PV Console (xenconsoled)
+ Status, QEMU: Supported
- Status: Supported
+### PV Console (xenconsoled)
Host-side implementation of the Xen PV console protocol
-### PV keyboard (backend)
+ Status: Supported
- Status, QEMU: Supported
+### PV keyboard (backend)
Host-side implementation of the Xen PV keyboard protocol.
Note that the "keyboard protocol" includes mouse / pointer support as well.
-### PV USB (backend)
-
Status, QEMU: Supported
+### PV USB (backend)
+
Host-side implementation of the Xen PV USB protocol
+ Status, QEMU: Supported
+
### PV SCSI protocol (backend)
Status, Linux: Experimental
@@ -499,11 +503,11 @@ but has no xl support.
### Driver Domains
- Status: Supported, with caveats
-
"Driver domains" means allowing non-Domain 0 domains
with access to physical devices to act as back-ends.
+ Status: Supported, with caveats
+
See the appropriate "Device Passthrough" section
for more information about security support.
@@ -553,13 +557,13 @@ with dom0, driver domains, stub domains, domUs, and so on.
### x86/Nested PV
- Status, x86 Xen HVM: Tech Preview
-
This means running a Xen hypervisor inside an HVM domain on a Xen system,
with support for PV L2 guests only
(i.e., hardware virtualization extensions not provided
to the guest).
+ Status, x86 Xen HVM: Tech Preview
+
This works, but has performance limitations
because the L1 dom0 can only access emulated L1 devices.
@@ -568,19 +572,19 @@ but nobody has reported on performance.
### x86/Nested HVM
- Status, x86 HVM: Experimental
-
This means providing hardware virtulization support to guest VMs
allowing, for instance, a nested Xen to support both PV and HVM guests.
It also implies support for other hypervisors,
such as KVM, Hyper-V, Bromium, and so on as guests.
-### vPMU
+ Status, x86 HVM: Experimental
- Status, x86: Supported, Not security supported
+### vPMU
Virtual Performance Management Unit for HVM guests
+ Status, x86: Supported, Not security supported
+
Disabled by default (enable with hypervisor command line option).
This feature is not security supported: see http://xenbits.xen.org/xsa/advisory-163.html
@@ -604,14 +608,14 @@ when used to remove drivers and backends from domain 0
### x86/Multiple IOREQ servers
- Status: Experimental
-
An IOREQ server provides emulated devices to HVM and PVH guests.
QEMU is normally the only IOREQ server,
but Xen has support for multiple IOREQ servers.
This allows for custom or proprietary device emulators
to be used in addition to QEMU.
+ Status: Experimental
+
### ARM/Non-PCI device passthrough
Status: Supported, not security supported
@@ -635,7 +639,11 @@ No support for QEMU backends in a 16K or 64K domain.
## Virtual Hardware, QEMU
-These are devices available in HVM mode using a qemu devicemodel (the default).
+This section describes supported devices available in HVM mode using a
+qemu devicemodel (the default).
+
+ Status: Support scope restricted
+
Note that other devices are available but not security supported.
### x86/Emulated platform devices (QEMU):
@@ -685,9 +693,10 @@ See the section **Blkback** for image formats supported by QEMU.
### x86/HVM iPXE
+Booting a guest via PXE.
+
Status: Supported, with caveats
-Booting a guest via PXE.
PXE inherently places full trust of the guest in the network,
and so should only be used
when the guest network is under the same administrative control
@@ -695,17 +704,17 @@ as the guest itself.
### x86/HVM BIOS
+Booting a guest via guest BIOS firmware
+
Status, SeaBIOS (qemu-xen): Supported
Status, ROMBIOS (qemu-xen-traditional): Supported
-Booting a guest via guest BIOS firmware
-
### x86/HVM OVMF
- Status, qemu-xen: Supported
-
OVMF firmware implements the UEFI boot protocol.
+ Status, qemu-xen: Supported
+
# Format and definitions
This file contains prose, and machine-readable fragments.
--
2.1.4
_______________________________________________
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Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH 5/5] SUPPORT.md: Document the new text ordering rule
2018-04-12 18:26 [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
` (3 preceding siblings ...)
2018-04-12 18:26 ` [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info Ian Jackson
@ 2018-04-12 18:26 ` Ian Jackson
2018-04-13 10:14 ` Lars Kurth
2018-04-12 18:29 ` [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
2018-04-13 4:37 ` Juergen Gross
6 siblings, 1 reply; 15+ messages in thread
From: Ian Jackson @ 2018-04-12 18:26 UTC (permalink / raw)
To: xen-devel; +Cc: Juergen Gross, Lars Kurth, Ian Jackson, George Dunlap
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
SUPPORT.md | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/SUPPORT.md b/SUPPORT.md
index 5ae84cf..098262b 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -725,6 +725,11 @@ The file is in markdown format.
The machine-readable fragments are markdown literals
containing RFC-822-like (deb822-like) data.
+In each case, descriptions which expand on the name of a feature as
+provided in the section heading, precede the Status indications.
+Any paragraphs which follow the Status indication are caveats or
+qualifications of the information provided in Status fields.
+
## Keys found in the Feature Support subsections
### Status
--
2.1.4
_______________________________________________
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Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply related [flat|nested] 15+ messages in thread
* Re: [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats
2018-04-12 18:26 [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
` (4 preceding siblings ...)
2018-04-12 18:26 ` [PATCH 5/5] SUPPORT.md: Document the new text ordering rule Ian Jackson
@ 2018-04-12 18:29 ` Ian Jackson
2018-04-13 7:56 ` Lars Kurth
2018-04-13 4:37 ` Juergen Gross
6 siblings, 1 reply; 15+ messages in thread
From: Ian Jackson @ 2018-04-12 18:29 UTC (permalink / raw)
To: xen-devel, Juergen Gross, George Dunlap, Lars Kurth
Ian Jackson writes ("[PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats"):
> The new support matrix output puts a [*] after each entry in the
> support matrix in many cases where the linked-to text is simply a
> longer description of the feature.
Example output:
https://xenbits.xen.org/people/iwj/2018/support-matrix-example-B-v1/t.html
Ian.
_______________________________________________
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Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats
2018-04-12 18:26 [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
` (5 preceding siblings ...)
2018-04-12 18:29 ` [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
@ 2018-04-13 4:37 ` Juergen Gross
6 siblings, 0 replies; 15+ messages in thread
From: Juergen Gross @ 2018-04-13 4:37 UTC (permalink / raw)
To: Ian Jackson, xen-devel; +Cc: Lars Kurth, George Dunlap
On 12/04/18 20:26, Ian Jackson wrote:
> The new support matrix output puts a [*] after each entry in the
> support matrix in many cases where the linked-to text is simply a
> longer description of the feature.
>
> Remedy this by distinguishing text which expands on a feature
> description from text which qualifies its support status.
>
> There are 3 patches to processing machinery, followed by two patches
> to SUPPORT.md - one to make the distinction, throughout, and one to
> document it.
>
> The patches to SUPPORT.md would ideally go to 4.10 too.
>
> 1/5 docs/parse-support-md: internals: Introduce docref_a
> 2/5 docs/parse-support-md: internals: Rename HasText to
> 3/5 SUPPORT.md, support matrix: Treat commentary before
> 4/5 SUPPORT.md: Move descriptions up before Status info
> 5/5 SUPPORT.md: Document the new text ordering rule
For the complete series:
Release-acked-by: Juergen Gross <jgross@suse.com>
Juergen
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^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats
2018-04-12 18:29 ` [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
@ 2018-04-13 7:56 ` Lars Kurth
0 siblings, 0 replies; 15+ messages in thread
From: Lars Kurth @ 2018-04-13 7:56 UTC (permalink / raw)
To: Ian Jackson, xen-devel, Juergen Gross, George Dunlap
On 12/04/2018, 19:29, "Ian Jackson" <ian.jackson@citrix.com> wrote:
Ian Jackson writes ("[PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats"):
> The new support matrix output puts a [*] after each entry in the
> support matrix in many cases where the linked-to text is simply a
> longer description of the feature.
Example output:
https://xenbits.xen.org/people/iwj/2018/support-matrix-example-B-v1/t.html
Looks good to me
Lars
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 5/5] SUPPORT.md: Document the new text ordering rule
2018-04-12 18:26 ` [PATCH 5/5] SUPPORT.md: Document the new text ordering rule Ian Jackson
@ 2018-04-13 10:14 ` Lars Kurth
2018-04-13 10:31 ` Ian Jackson
0 siblings, 1 reply; 15+ messages in thread
From: Lars Kurth @ 2018-04-13 10:14 UTC (permalink / raw)
To: xen-devel; +Cc: Juergen Gross, Ian Jackson, George Dunlap
On 12/04/2018, 19:26, "Ian Jackson" <ian.jackson@eu.citrix.com> wrote:
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
SUPPORT.md | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/SUPPORT.md b/SUPPORT.md
index 5ae84cf..098262b 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -725,6 +725,11 @@ The file is in markdown format.
The machine-readable fragments are markdown literals
containing RFC-822-like (deb822-like) data.
+In each case, descriptions which expand on the name of a feature as
+provided in the section heading, precede the Status indications.
The following is a little clearer
s/, descriptions which expand on the name of a feature as provided in the section heading,/, descriptions which describe the feature in the section heading in more detail,/
+Any paragraphs which follow the Status indication are caveats or
+qualifications of the information provided in Status fields.
+
## Keys found in the Feature Support subsections
### Status
Acked-by: Lars Kurth <lars.kurth@citrix.com>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 5/5] SUPPORT.md: Document the new text ordering rule
2018-04-13 10:14 ` Lars Kurth
@ 2018-04-13 10:31 ` Ian Jackson
2018-04-13 11:58 ` Lars Kurth
0 siblings, 1 reply; 15+ messages in thread
From: Ian Jackson @ 2018-04-13 10:31 UTC (permalink / raw)
To: Lars Kurth; +Cc: Juergen Gross, xen-devel, George Dunlap
Lars Kurth writes ("Re: [PATCH 5/5] SUPPORT.md: Document the new text ordering rule"):
...
> +In each case, descriptions which expand on the name of a feature as
> +provided in the section heading, precede the Status indications.
>
> The following is a little clearer
> s/, descriptions which expand on the name of a feature as provided in the section heading,/, descriptions which describe the feature in the section heading in more detail,/
I used the wording I did because the word "description" is very
elastic, and might well be thought to include things that we intend as
caveats.
Ian.
_______________________________________________
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Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info
2018-04-12 18:26 ` [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info Ian Jackson
@ 2018-04-13 11:31 ` Lars Kurth
2018-04-17 13:22 ` Ian Jackson
0 siblings, 1 reply; 15+ messages in thread
From: Lars Kurth @ 2018-04-13 11:31 UTC (permalink / raw)
To: xen-devel; +Cc: Juergen Gross, Ian Jackson, George Dunlap
[-- Attachment #1: Type: text/plain, Size: 20298 bytes --]
On 12/04/2018, 19:27, "Ian Jackson" <ian.jackson@eu.citrix.com> wrote:
This turns all the things which were treated as caveats, but which
don't need to be footnoted in the matrix, into descriptions.
For the benefit of the support matrix generator, this patch (or a
version of it) should be backported to 4.10.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Ian: I manually checked that the table for 4.11 matches SUPPORT.md and this patch and against the output at https://xenbits.xen.org/people/iwj/2018/support-matrix-example-B-v1/t.html
There were a couple of minor text changes for grammar reasons, which I noticed and highlighted.
I also checked the code motions. There are some things which need to be pointed out, but they should not prevent this series from being checked in.
However, a couple were missed
* ### PV Console (frontend) => missed moving the note (which is a definition)
There is a rendering issue also
Reviewed-by: Lars Kurth <lars.kurth@citrix.com>
I also spotted a few other inconsistencies, which we probably should fix, but these need backporting
* ARM: 16K and 64K page granularity in guests
* ARM: Guest Device Tree support
* ARM: Guest ACPI support
In all the other section headers we use x86/ or ARM/
---
SUPPORT.md | 213 ++++++++++++++++++++++++++++++++-----------------------------
1 file changed, 111 insertions(+), 102 deletions(-)
diff --git a/SUPPORT.md b/SUPPORT.md
index 264b23f..5ae84cf 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -58,32 +58,29 @@ for the definitions of the support status levels etc.
[snip]
## Guest Type
### x86/PV
- Status: Supported
-
Traditional Xen PV guest
No hardware requirements
-### x86/HVM
+ Status: Supported
- Status, domU: Supported
+### x86/HVM
Fully virtualised guest using hardware virtualisation extensions
Requires hardware virtualisation support (Intel VMX / AMD SVM)
-### x86/PVH
-
Status, domU: Supported
- Status, dom0: Experimental
+
+### x86/PVH
PVH is a next-generation paravirtualized mode
designed to take advantage of hardware virtualization support when possible.
Looks correct from a mere refactoring perspective, but generates some odd behaviour in https://xenbits.xen.org/people/iwj/2018/support-matrix-example-B-v1/t.html
The underlying reason is that we had some headline re-names between 4.10 and 4.11. e.g.
ARM guest => ARM
And some support statement changes, e.g. in x86/HVM guest
Status: Supported => Status, domU: Supported
We probably need to go through some of these in 4.10 and fix them
But for 4.11 this is correct
I attached a little screenshot to explain
The implication is that we need to minimize unnecessary changes to
a) headings
b) clarifications to status before the colon
or backport them to older versions of SUPPORT.md. Otherwise the generated table will become confusing
@@ -93,12 +90,15 @@ Requires hardware virtualisation support (Intel VMX / AMD SVM).
Dom0 support requires an IOMMU (Intel VT-d / AMD IOMMU).
-### ARM
+ Status, domU: Supported
+ Status, dom0: Experimental
- Status: Supported
+### ARM
ARM only has one guest type at the moment
+ Status: Supported
+
## Toolstack
### xl
@@ -107,12 +107,12 @@ ARM only has one guest type at the moment
### Direct-boot kernel image format
+Format which the toolstack accepts for direct-boot kernels
+
Supported, x86: bzImage, ELF
Supported, ARM32: zImage
Supported, ARM64: Image
-Format which the toolstack accepts for direct-boot kernels
-
Note: the format here is wrong in both 4.10 and 4.11, this should be something like
Status, zImage (ARM32): Supported
Lars will submit a separate patch
### Dom0 init support for xl
Status, SysV: Supported
@@ -121,10 +121,10 @@ Format which the toolstack accepts for direct-boot kernels
### JSON output support for xl
- Status: Experimental
-
Output of information in machine-parseable JSON format
+ Status: Experimental
+
### Open vSwitch integration for xl
Status, Linux: Supported
@@ -157,17 +157,18 @@ Output of information in machine-parseable JSON format
### Hypervisor 'debug keys'
- Status: Supported, not security supported
-
These are functions triggered either from the host serial console,
or via the xl 'debug-keys' command,
which cause Xen to dump various hypervisor state to the console.
+ Status: Supported, not security supported
+
### Hypervisor synchronous console output (sync_console)
+Xen command-line flag to force synchronous console output.
+
Status: Supported, not security supported
-Xen command-line flag to force synchronous console output.
Useful for debugging, but not suitable for production environments
due to incurred overhead.
@@ -179,56 +180,54 @@ Debugger to debug ELF guests
### Soft-reset for PV guests
- Status: Supported
-
Soft-reset allows a new kernel to start 'from scratch' with a fresh VM state,
but with all the memory from the previous state of the VM intact.
This is primarily designed to allow "crash kernels",
which can do core dumps of memory to help with debugging in the event of a crash.
-### xentrace
+ Status: Supported
- Status, x86: Supported
+### xentrace
Tool to capture Xen trace buffer data
-### gcov
+ Status, x86: Supported
- Status: Supported, Not security supported
+### gcov
Export hypervisor coverage data suitable for analysis by gcov or lcov.
+ Status: Supported, Not security supported
+
## Memory Management
### Dynamic memory control
- Status: Supported
-
Allows a guest to add or remove memory after boot-time.
This is typically done by a guest kernel agent known as a "balloon driver".
-### Populate-on-demand memory
+ Status: Supported
- Status, x86 HVM: Supported
+### Populate-on-demand memory
This is a mechanism that allows normal operating systems with only a balloon driver
to boot with memory < maxmem.
-### Memory Sharing
+ Status, x86 HVM: Supported
- Status, x86 HVM: Expermental
+### Memory Sharing
Allow sharing of identical pages between guests
-### Memory Paging
+ Status, x86 HVM: Expermental
- Status, x86 HVM: Experimenal
+### Memory Paging
Allow pages belonging to guests to be paged to disk
-### Transcendent Memory
+ Status, x86 HVM: Experimenal
- Status: Experimental
+### Transcendent Memory
Transcendent Memory (tmem) allows the creation of hypervisor memory pools
which guests can use to store memory
@@ -236,96 +235,100 @@ rather than caching in its own memory or swapping to disk.
Having these in the hypervisor
can allow more efficient aggregate use of memory across VMs.
-### Alternative p2m
+ Status: Experimental
- Status, x86 HVM: Tech Preview
- Status, ARM: Tech Preview
+### Alternative p2m
Allows external monitoring of hypervisor memory
by maintaining multiple physical to machine (p2m) memory mappings.
+ Status, x86 HVM: Tech Preview
+ Status, ARM: Tech Preview
+
## Resource Management
### CPU Pools
- Status: Supported
-
Groups physical cpus into distinct groups called "cpupools",
with each pool having the capability
of using different schedulers and scheduling properties.
-### Credit Scheduler
-
Status: Supported
+### Credit Scheduler
+
A weighted proportional fair share virtual CPU scheduler.
This is the default scheduler.
-### Credit2 Scheduler
-
Status: Supported
+### Credit2 Scheduler
+
A general purpose scheduler for Xen,
designed with particular focus on fairness, responsiveness, and scalability
-### RTDS based Scheduler
+ Status: Supported
- Status: Experimental
+### RTDS based Scheduler
A soft real-time CPU scheduler
built to provide guaranteed CPU capacity to guest VMs on SMP hosts
+ Status: Experimental
+
### ARINC653 Scheduler
+A periodically repeating fixed timeslice scheduler.
+
Status: Supported
-A periodically repeating fixed timeslice scheduler.
Currently only single-vcpu domains are supported.
### Null Scheduler
- Status: Experimental
-
A very simple, very static scheduling policy
that always schedules the same vCPU(s) on the same pCPU(s).
It is designed for maximum determinism and minimum overhead
on embedded platforms.
-### NUMA scheduler affinity
+ Status: Experimental
- Status, x86: Supported
+### NUMA scheduler affinity
Enables NUMA aware scheduling in Xen
+ Status, x86: Supported
+
## Scalability
### Super page support
- Status, x86 HVM/PVH, HAP: Supported
- Status, x86 HVM/PVH, Shadow, 2MiB: Supported
- Status, ARM: Supported
-
NB that this refers to the ability of guests
The beginning of this sentence should probably be changed to
"This feature refers to the ability of guests ..."
to have higher-level page table entries point directly to memory,
improving TLB performance.
On ARM, and on x86 in HAP mode,
the guest has whatever support is enabled by the hardware.
+
+This feature is independent
+of the ARM "page granularity" feature (see below).
+
+ Status, x86 HVM/PVH, HAP: Supported
+ Status, x86 HVM/PVH, Shadow, 2MiB: Supported
+ Status, ARM: Supported
+
On x86 in shadow mode, only 2MiB (L2) superpages are available;
furthermore, they do not have the performance characteristics
of hardware superpages.
-Also note is feature independent
-of the ARM "page granularity" feature (see below).
-
### x86/PVHVM
- Status: Supported
-
This is a useful label for a set of hypervisor features
which add paravirtualized functionality to HVM guests
for improved performance and scalability.
This includes exposing event channels to HVM guests.
+ Status: Supported
+
## High Availability and Fault Tolerance
### Remus Fault Tolerance
@@ -338,38 +341,38 @@ This includes exposing event channels to HVM guests.
### x86/vMCE
- Status: Supported
-
Forward Machine Check Exceptions to appropriate guests
+ Status: Supported
+
## Virtual driver support, guest side
### Blkfront
+Guest-side driver capable of speaking the Xen PV block protocol
+
Status, Linux: Supported
Status, FreeBSD: Supported, Security support external
Status, NetBSD: Supported, Security support external
Status, OpenBSD: Supported, Security support external
Status, Windows: Supported
-Guest-side driver capable of speaking the Xen PV block protocol
-
### Netfront
+Guest-side driver capable of speaking the Xen PV networking protocol
+
Status, Linux: Supported
Status, FreeBSD: Supported, Security support external
Status, NetBSD: Supported, Security support external
Status, OpenBSD: Supported, Security support external
Status, Windows: Supported
-Guest-side driver capable of speaking the Xen PV networking protocol
-
### PV Framebuffer (frontend)
- Status, Linux (xen-fbfront): Supported
-
Guest-side driver capable of speaking the Xen PV Framebuffer protocol
+ Status, Linux (xen-fbfront): Supported
+
### PV Console (frontend)
Status, Linux (hvc_xen): Supported
@@ -381,11 +384,11 @@ Guest-side driver capable of speaking the Xen PV console protocol
### PV keyboard (frontend)
- Status, Linux (xen-kbdfront): Supported
-
Guest-side driver capable of speaking the Xen PV keyboard protocol.
Note that the "keyboard protocol" includes mouse / pointer support as well.
+ Status, Linux (xen-kbdfront): Supported
+
### PV USB (frontend)
Status, Linux: Supported
@@ -399,22 +402,22 @@ there is currently no xl support.
### PV TPM (frontend)
- Status, Linux (xen-tpmfront): Tech Preview
-
Guest-side driver capable of speaking the Xen PV TPM protocol
-### PV 9pfs frontend
+ Status, Linux (xen-tpmfront): Tech Preview
- Status, Linux: Tech Preview
+### PV 9pfs frontend
Guest-side driver capable of speaking the Xen 9pfs protocol
-### PVCalls (frontend)
-
Status, Linux: Tech Preview
+### PVCalls (frontend)
+
Guest-side driver capable of making pv system calls
+ Status, Linux: Tech Preview
+
## Virtual device support, host side
For host-side virtual device support,
@@ -423,6 +426,8 @@ unless otherwise noted.
### Blkback
+Host-side implementations of the Xen PV block protocol.
+
Status, Linux (xen-blkback): Supported
Status, QEMU (xen_disk), raw format: Supported
Status, QEMU (xen_disk), qcow format: Supported
@@ -433,42 +438,41 @@ unless otherwise noted.
Status, Blktap2, raw format: Deprecated
Status, Blktap2, vhd format: Deprecated
-Host-side implementations of the Xen PV block protocol.
Backends only support raw format unless otherwise specified.
### Netback
+Host-side implementations of Xen PV network protocol
+
Status, Linux (xen-netback): Supported
Status, FreeBSD (netback): Supported, Security support external
Status, NetBSD (xennetback): Supported, Security support external
-Host-side implementations of Xen PV network protocol
-
### PV Framebuffer (backend)
- Status, QEMU: Supported
-
Host-side implementation of the Xen PV framebuffer protocol
-### PV Console (xenconsoled)
+ Status, QEMU: Supported
- Status: Supported
+### PV Console (xenconsoled)
Host-side implementation of the Xen PV console protocol
-### PV keyboard (backend)
+ Status: Supported
- Status, QEMU: Supported
+### PV keyboard (backend)
Host-side implementation of the Xen PV keyboard protocol.
Note that the "keyboard protocol" includes mouse / pointer support as well.
-### PV USB (backend)
-
Status, QEMU: Supported
+### PV USB (backend)
+
Host-side implementation of the Xen PV USB protocol
+ Status, QEMU: Supported
+
### PV SCSI protocol (backend)
Status, Linux: Experimental
@@ -499,11 +503,11 @@ but has no xl support.
### Driver Domains
- Status: Supported, with caveats
-
"Driver domains" means allowing non-Domain 0 domains
with access to physical devices to act as back-ends.
+ Status: Supported, with caveats
+
See the appropriate "Device Passthrough" section
for more information about security support.
@@ -553,13 +557,13 @@ with dom0, driver domains, stub domains, domUs, and so on.
### x86/Nested PV
- Status, x86 Xen HVM: Tech Preview
-
This means running a Xen hypervisor inside an HVM domain on a Xen system,
with support for PV L2 guests only
(i.e., hardware virtualization extensions not provided
to the guest).
+ Status, x86 Xen HVM: Tech Preview
+
This works, but has performance limitations
because the L1 dom0 can only access emulated L1 devices.
@@ -568,19 +572,19 @@ but nobody has reported on performance.
### x86/Nested HVM
- Status, x86 HVM: Experimental
-
This means providing hardware virtulization support to guest VMs
allowing, for instance, a nested Xen to support both PV and HVM guests.
It also implies support for other hypervisors,
such as KVM, Hyper-V, Bromium, and so on as guests.
-### vPMU
+ Status, x86 HVM: Experimental
- Status, x86: Supported, Not security supported
+### vPMU
Virtual Performance Management Unit for HVM guests
+ Status, x86: Supported, Not security supported
+
Disabled by default (enable with hypervisor command line option).
This feature is not security supported: see http://xenbits.xen.org/xsa/advisory-163.html
@@ -604,14 +608,14 @@ when used to remove drivers and backends from domain 0
### x86/Multiple IOREQ servers
- Status: Experimental
-
An IOREQ server provides emulated devices to HVM and PVH guests.
QEMU is normally the only IOREQ server,
but Xen has support for multiple IOREQ servers.
This allows for custom or proprietary device emulators
to be used in addition to QEMU.
+ Status: Experimental
+
### ARM/Non-PCI device passthrough
Status: Supported, not security supported
@@ -635,7 +639,11 @@ No support for QEMU backends in a 16K or 64K domain.
## Virtual Hardware, QEMU
-These are devices available in HVM mode using a qemu devicemodel (the default).
+This section describes supported devices available in HVM mode using a
+qemu devicemodel (the default).
+
+ Status: Support scope restricted
+
Note that other devices are available but not security supported.
This is causing a rendering issue: the footnote is not generated in the right place. It is added to " stgvga". Presumably a corner case in the table generation tool
### x86/Emulated platform devices (QEMU):
@@ -685,9 +693,10 @@ See the section **Blkback** for image formats supported by QEMU.
### x86/HVM iPXE
+Booting a guest via PXE.
+
Status: Supported, with caveats
-Booting a guest via PXE.
PXE inherently places full trust of the guest in the network,
and so should only be used
when the guest network is under the same administrative control
@@ -695,17 +704,17 @@ as the guest itself.
### x86/HVM BIOS
+Booting a guest via guest BIOS firmware
+
Status, SeaBIOS (qemu-xen): Supported
Status, ROMBIOS (qemu-xen-traditional): Supported
-Booting a guest via guest BIOS firmware
-
### x86/HVM OVMF
- Status, qemu-xen: Supported
-
OVMF firmware implements the UEFI boot protocol.
+ Status, qemu-xen: Supported
+
# Format and definitions
This file contains prose, and machine-readable fragments.
--
2.1.4
[-- Attachment #2: Impact of headingsupport changes in generated table.png --]
[-- Type: image/png, Size: 228694 bytes --]
[-- Attachment #3: Type: text/plain, Size: 157 bytes --]
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^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 5/5] SUPPORT.md: Document the new text ordering rule
2018-04-13 10:31 ` Ian Jackson
@ 2018-04-13 11:58 ` Lars Kurth
0 siblings, 0 replies; 15+ messages in thread
From: Lars Kurth @ 2018-04-13 11:58 UTC (permalink / raw)
To: Ian Jackson; +Cc: Juergen Gross, xen-devel, George Dunlap
On 13/04/2018, 11:31, "Ian Jackson" <ian.jackson@citrix.com> wrote:
Lars Kurth writes ("Re: [PATCH 5/5] SUPPORT.md: Document the new text ordering rule"):
...
> +In each case, descriptions which expand on the name of a feature as
> +provided in the section heading, precede the Status indications.
>
> The following is a little clearer
> s/, descriptions which expand on the name of a feature as provided in the section heading,/, descriptions which describe the feature in the section heading in more detail,/
I used the wording I did because the word "description" is very
elastic, and might well be thought to include things that we intend as
caveats.
I don't mind either way. Just something which sounded odd.
Lars
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^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info
2018-04-13 11:31 ` Lars Kurth
@ 2018-04-17 13:22 ` Ian Jackson
2018-04-17 15:49 ` Lars Kurth
0 siblings, 1 reply; 15+ messages in thread
From: Ian Jackson @ 2018-04-17 13:22 UTC (permalink / raw)
To: Lars Kurth; +Cc: Juergen Gross, Ian Jackson, George Dunlap, xen-devel
Lars Kurth writes ("Re: [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info"):
> There were a couple of minor text changes for grammar reasons, which I noticed and highlighted.
Thanks.
> I also checked the code motions. There are some things which need to be pointed out, but they should not prevent this series from being checked in.
>
> However, a couple were missed
> * ### PV Console (frontend) => missed moving the note (which is a definition)
That's one, not a couple. I have fixed it.
> I also spotted a few other inconsistencies, which we probably should fix, but these need backporting
> * ARM: 16K and 64K page granularity in guests
> * ARM: Guest Device Tree support
> * ARM: Guest ACPI support
> In all the other section headers we use x86/ or ARM/
I think "x86:" and "ARM:" are more natural so I would prefer that
bikeshed purple rather than blue. I think the "/" came from the
example of the guest types, which are indeed in some sense "x86/HVM"
rather than "x86: HVM".
I think we should treat that as a separate issue from this series.
> -### x86/PVH
> -
> Status, domU: Supported
> - Status, dom0: Experimental
> +
> +### x86/PVH
>
> PVH is a next-generation paravirtualized mode
> designed to take advantage of hardware virtualization support when possible.
>
> Looks correct from a mere refactoring perspective, but generates some odd behaviour in https://xenbits.xen.org/people/iwj/2018/support-matrix-example-B-v1/t.html
>
> The underlying reason is that we had some headline re-names between 4.10 and 4.11. e.g.
> ARM guest => ARM
>
> And some support statement changes, e.g. in x86/HVM guest
> Status: Supported => Status, domU: Supported
The rendering is indeed not ideal. Our options are:
(a) Live with it and document it.
(b) Make it our practice to go always back and backport a name
change for a feature to all versions. I'm not sure this is worth
the effort.
(c) Invent some new equivalency metadata to put into SUPPORT.md or
even into some other file in-tree. Urgh, I don't want to do
that.
I chose (a). You will see a paragraph about this at the top of the
html page:
Sometimes the same feature, or a similar feature, is named
differently in the documentation for different releases. In such
cases the table will show it as two separate features, with a
discontinuity in support, even though support may have been
continuous.
> We probably need to go through some of these in 4.10 and fix them
> But for 4.11 this is correct
I think the 4.10 documentation is not wrong, just differently
expressed.
> The implication is that we need to minimize unnecessary changes to
> a) headings
> b) clarifications to status before the colon
> or backport them to older versions of SUPPORT.md. Otherwise the generated table will become confusing
See above. If you want to backport the heading changes, I'll ack your
patches :-).
> ### Direct-boot kernel image format
>
> +Format which the toolstack accepts for direct-boot kernels
> +
> Supported, x86: bzImage, ELF
> Supported, ARM32: zImage
> Supported, ARM64: Image
>
> -Format which the toolstack accepts for direct-boot kernels
> -
>
> Note: the format here is wrong in both 4.10 and 4.11, this should be something like
>
> Status, zImage (ARM32): Supported
>
> Lars will submit a separate patch
This is not a blocker because I added parsing code for this format.
If you fix it, we can drop that, too, once the change is backported.
> ## Scalability
>
> ### Super page support
>
> - Status, x86 HVM/PVH, HAP: Supported
> - Status, x86 HVM/PVH, Shadow, 2MiB: Supported
> - Status, ARM: Supported
> -
> NB that this refers to the ability of guests
>
> The beginning of this sentence should probably be changed to
> "This feature refers to the ability of guests ..."
Or even just "The ability of guests ..." since we don't normally lead
each thing with "this is". I think this is not very important. If
you want to improve it I will ack your patch.
> ## Virtual Hardware, QEMU
>
> -These are devices available in HVM mode using a qemu devicemodel (the default).
> +This section describes supported devices available in HVM mode using a
> +qemu devicemodel (the default).
> +
> + Status: Support scope restricted
> +
> Note that other devices are available but not security supported.
>
> This is causing a rendering issue: the footnote is not generated in the right place. It is added to " stgvga". Presumably a corner case in the table generation tool
Yes. It is generating semantically invalid html which renders very
oddly, too. I will fix it.
Thanks,
Ian.
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^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info
2018-04-17 13:22 ` Ian Jackson
@ 2018-04-17 15:49 ` Lars Kurth
0 siblings, 0 replies; 15+ messages in thread
From: Lars Kurth @ 2018-04-17 15:49 UTC (permalink / raw)
To: Ian Jackson; +Cc: Juergen Gross, xen-devel, George Dunlap
On 17/04/2018, 14:22, "Ian Jackson" <ian.jackson@citrix.com> wrote:
Lars Kurth writes ("Re: [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info"):
> There were a couple of minor text changes for grammar reasons, which I noticed and highlighted.
Thanks.
> I also checked the code motions. There are some things which need to be pointed out, but they should not prevent this series from being checked in.
>
> However, a couple were missed
> * ### PV Console (frontend) => missed moving the note (which is a definition)
That's one, not a couple. I have fixed it.
> I also spotted a few other inconsistencies, which we probably should fix, but these need backporting
> * ARM: 16K and 64K page granularity in guests
> * ARM: Guest Device Tree support
> * ARM: Guest ACPI support
> In all the other section headers we use x86/ or ARM/
I think "x86:" and "ARM:" are more natural so I would prefer that
bikeshed purple rather than blue. I think the "/" came from the
example of the guest types, which are indeed in some sense "x86/HVM"
rather than "x86: HVM".
I think we should treat that as a separate issue from this series.
Agreed
> -### x86/PVH
> -
> Status, domU: Supported
> - Status, dom0: Experimental
> +
> +### x86/PVH
>
> PVH is a next-generation paravirtualized mode
> designed to take advantage of hardware virtualization support when possible.
>
> Looks correct from a mere refactoring perspective, but generates some odd behaviour in https://xenbits.xen.org/people/iwj/2018/support-matrix-example-B-v1/t.html
>
> The underlying reason is that we had some headline re-names between 4.10 and 4.11. e.g.
> ARM guest => ARM
>
> And some support statement changes, e.g. in x86/HVM guest
> Status: Supported => Status, domU: Supported
The rendering is indeed not ideal. Our options are:
(a) Live with it and document it.
(b) Make it our practice to go always back and backport a name
change for a feature to all versions. I'm not sure this is worth
the effort.
(c) Invent some new equivalency metadata to put into SUPPORT.md or
even into some other file in-tree. Urgh, I don't want to do
that.
I chose (a). You will see a paragraph about this at the top of the
html page:
Sometimes the same feature, or a similar feature, is named
differently in the documentation for different releases. In such
cases the table will show it as two separate features, with a
discontinuity in support, even though support may have been
continuous.
I can live with this approach
> We probably need to go through some of these in 4.10 and fix them
> But for 4.11 this is correct
I think the 4.10 documentation is not wrong, just differently
expressed.
> The implication is that we need to minimize unnecessary changes to
> a) headings
> b) clarifications to status before the colon
> or backport them to older versions of SUPPORT.md. Otherwise the generated table will become confusing
See above. If you want to backport the heading changes, I'll ack your
patches :-).
Happy to pick this up
> ### Direct-boot kernel image format
>
> +Format which the toolstack accepts for direct-boot kernels
> +
> Supported, x86: bzImage, ELF
> Supported, ARM32: zImage
> Supported, ARM64: Image
>
> -Format which the toolstack accepts for direct-boot kernels
> -
>
> Note: the format here is wrong in both 4.10 and 4.11, this should be something like
>
> Status, zImage (ARM32): Supported
>
> Lars will submit a separate patch
This is not a blocker because I added parsing code for this format.
If you fix it, we can drop that, too, once the change is backported.
> ## Scalability
>
> ### Super page support
>
> - Status, x86 HVM/PVH, HAP: Supported
> - Status, x86 HVM/PVH, Shadow, 2MiB: Supported
> - Status, ARM: Supported
> -
> NB that this refers to the ability of guests
>
> The beginning of this sentence should probably be changed to
> "This feature refers to the ability of guests ..."
Or even just "The ability of guests ..." since we don't normally lead
each thing with "this is". I think this is not very important. If
you want to improve it I will ack your patch.
Sure, I can roll this up with the other changes on my list
> ## Virtual Hardware, QEMU
>
> -These are devices available in HVM mode using a qemu devicemodel (the default).
> +This section describes supported devices available in HVM mode using a
> +qemu devicemodel (the default).
> +
> + Status: Support scope restricted
> +
> Note that other devices are available but not security supported.
>
> This is causing a rendering issue: the footnote is not generated in the right place. It is added to " stgvga". Presumably a corner case in the table generation tool
Yes. It is generating semantically invalid html which renders very
oddly, too. I will fix it.
Thanks
Lars
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2018-04-17 15:50 UTC | newest]
Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-12 18:26 [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
2018-04-12 18:26 ` [PATCH 1/5] docs/parse-support-md: internals: Introduce docref_a Ian Jackson
2018-04-12 18:26 ` [PATCH 2/5] docs/parse-support-md: internals: Rename HasText to HasCaveat Ian Jackson
2018-04-12 18:26 ` [PATCH 3/5] SUPPORT.md, support matrix: Treat commentary before status as description Ian Jackson
2018-04-12 18:26 ` [PATCH 4/5] SUPPORT.md: Move descriptions up before Status info Ian Jackson
2018-04-13 11:31 ` Lars Kurth
2018-04-17 13:22 ` Ian Jackson
2018-04-17 15:49 ` Lars Kurth
2018-04-12 18:26 ` [PATCH 5/5] SUPPORT.md: Document the new text ordering rule Ian Jackson
2018-04-13 10:14 ` Lars Kurth
2018-04-13 10:31 ` Ian Jackson
2018-04-13 11:58 ` Lars Kurth
2018-04-12 18:29 ` [PATCH 0/5] SUPPORT.md: Distinguish descriptions from caveats Ian Jackson
2018-04-13 7:56 ` Lars Kurth
2018-04-13 4:37 ` Juergen Gross
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