when 'periodic_period' is zero, there is no need to initialize 'now'.
Signed-off-by: Baodong Chen <chenbaodong@mxnavi.com>
Acked-by: Dario Faggioli <dfaggioli@suse.com>
This is to accompany sanitize_input(). Just like for initial state we
want to have state between two emulated insns sane, at least as far as
assumptions in the main emulator go. Do minimal checking after segment
register, CR, and MSR writes, and roll back to the old value in case of
failure (raising #GP(0) at the same time).
In the particular case observed, a CR0 write clearing CR0.PE was
followed by a VEX-encoded insn, which the decoder accepts based on
guest address size, restricting things just outside of the 64-bit case
(real and virtual modes don't allow VEX-encoded insns). Subsequently
_get_fpu() would then assert that CR0.PE must be set (and EFLAGS.VM
clear) when trying to invoke YMM, ZMM, or OPMASK state.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
Don't enforce any other dependencies for now, just like we don't enforce
e.g. PAE enabled as a prereq for long mode.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: George Dunlap <george.dunlap@citrix.com>
Drop the ap2m_active boolean, and consistently use the unlocking form:
if ( p2m != hostp2m )
__put_gfn(p2m, gfn);
__put_gfn(hostp2m, gfn);
which makes it clear that we always unlock the altp2m's gfn if it is in use,
and always unlock the hostp2m's gfn. This also drops the ternary expression
in the logdirty case.
Extend the logdirty comment to identify where the locking violation is liable
to occur.
No (intended) overall change in behaviour.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: George Dunlap <george.dunlap@citrix.com>
When you boot Xen with the default 256 NR_CPUS, on a box with rather more
processors, the resulting spew is unnecesserily verbose. Instead, print the
message once, e.g:
(XEN) ACPI: X2APIC (apic_id[0x115] uid[0x115] enabled)
(XEN) WARNING: NR_CPUS limit of 256 reached - ignoring further processors
(XEN) ACPI: X2APIC (apic_id[0x119] uid[0x119] enabled)
(XEN) ACPI: X2APIC (apic_id[0x11d] uid[0x11d] enabled)
(XEN) ACPI: X2APIC (apic_id[0x121] uid[0x121] enabled)
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reflow the ZynqMP message for grepability, and fix the omission of a newline.
There is a race condition where multiple cpus could race to set once_ boolean.
However, the use of this construct is mainly useful for boot time code, and
the only consequence of the race is a repeated print message.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Julien Grall <julien.grall@arm.com>
They are both Airmont-based and should have been included in c/s 17f74242cc
"x86/spec-ctrl: Extend repoline safey calcuations for eIBRS and Atom parts".
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
It appears that even 64-bit versions of Windows 10, when not using syth-
etic timers, will use 32-bit HPET non-periodic timers. There is a test
in hpet_set_timer(), specific to 32-bit timers, that tries to disambiguate
between a comparator value that is in the past and one that is sufficiently
far in the future that it wraps. This is done by assuming that the delta
between the main counter and comparator will be 'small' [1], if the
comparator value is in the past. Unfortunately, more often than not, this
is not the case if the timer is being re-started after a migrate and so
the timer is set to fire far in the future (in excess of a minute in
several observed cases) rather then set to fire immediately. This has a
rather odd symptom where the guest console is alive enough to be able to
deal with mouse pointer re-rendering, but any keyboard activity or mouse
clicks yield no response.
This patch simply adds an extra check of 'creation_finished' into
hpet_set_timer() so that the 'small' time test is omitted when the function
is called to restart timers after migration, and thus any negative delta
causes a timer to fire immediately.
[1] The number of ticks that equate to 0.9765625 milliseconds
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
The function passes 0 as "alloc" argument to addr_to_dma_page_maddr(),
so -ENOMEM simply makes no sense (and its use was probably simply a
copy-and-paste effect originating at intel_iommu_map_page()).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
There are no reason to consider the HW CPU ID will be 0 when the
processor is part of a uniprocessor system. At best, this will result to
conflicting output as the rest of Xen use the value directly read from
MPIDR_EL1.
So remove the zeroing and logic to check if the CPU is part of a
uniprocessor system.
Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Andrii Anisov <andrii_anisov@epam.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
At the moment, the earlyprintk messages are interleaved with the
instructions. This makes more difficult to read the objdump output.
Introduce a new macro to add a string in .rodata.str and use it for all
the earlyprintk messages.
Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Andrii Anisov <andrii_anisov@epam.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
The various pieces of the hypercall page infrastructure have grown
organically over time and ended up in a bit of a mess.
* Rename all functions to be of the form *_init_hypercall_page(). This
makes them somewhat shorter, and means they can actually be grepped
for in one go.
* Move init_hypercall_page() to domain.c. The 64-bit traps.c isn't a
terribly appropriate place for it to live.
* Drop an obsolete comment from hvm_init_hypercall_page() and drop the
domain parameter from hvm_funcs.init_hypercall_page() as it isn't
necessary.
* Rearrange the logic in the each function to avoid needing extra local
variables, and to write the page in one single pass.
No functional change.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Drop introduced trailing whitespace, excessively long lines, mal-indention,
superfluous use of PRI macros for int-or-smaller types, and incorrect PRI
macros for gfns and mfns.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: George Dunlap <george.dunlap@citrix.com>
The p2m_altp2m_lazy_copy is responsible for lazily populating an
altp2m view when the guest traps out due to no EPT entry being present
in the active view. Currently, in addition to taking a number of
unused argements, the whole calling convention has a number of
redundant p2m lookups: the function reads the hostp2m, even though the
caller has just read the same hostp2m entry; and then the caller
re-reads the altp2m entry that the function has just read (and possibly set).
Rework this function to make it a bit more rational. Specifically:
- Pass the current hostp2m entry values we have just read for it to
use to populate the altp2m entry if it finds the entry empty.
- If the altp2m entry is not empty, pass out the values we've read so
the caller doesn't need to re-walk the tables
- Either way, return with the gfn 'locked', to make clean-up handling
more consistent.
Rename the function to better reflect this functionality.
While we're here, change bool_t to bool, and return true/false rather
than 1/0.
It's a bit grating to do both the p2m_lock() and the get_gfn(),
knowing that they boil down to the same thing at the moment; but we
have to maintain the fiction until such time as we decide to get rid
of it entirely.
Signed-off-by: Tamas K Lengyel <tamas@tklengyel.com>
Signed-off-by: George Dunlap <george.dunlap@citrix.com>
Tested-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
vm_event_claim_slot() returns -EOPNOTSUPP for an uninitialized ring
since commit 15e4dd5e86 ("common/vm_event: Initialize vm_event
lists on domain creation"), but the callers test for -ENOSYS.
Correct the callers.
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Except in the top level function we don't mean to ever write through
"end". The variable is used solely for pointer comparison purposes
there. Add const everywhere.
Also make function heading wrapping style uniform again for all of the
involved functions.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Along the lines of b9f6395590 ("x86/cpuid: adjust dependencies of
post-SSE ISA extensions") further convert SSEn dependencies to be more
chain like, with each successor addition depending on its immediate
predecessor. This is more in line with how hardware has involved, and
how other projects like gcc and binutils connect things together.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
GCC 4.4 (as included in CentOS 6) is too old to handle designated initialisers
in anonymous unions. As this is just a developer tool, skip the test in this
case, rather than sacraficing the legibility/expresibility of the test cases.
This fixes the Gitlab CI tests.
While adding this logic to cpu-polcy, adjust the equivelent logic from
x86_emulator on which this was based. Printing:
Test harness not built, use newer compiler than "gcc"
isn't helpful for anyone unexpectedly encountering the error.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Instead of ignoring xen.lds and asm-offsets.s for every specific arch,
let's instead just use gitignore's wildcard feature to ignore them for
all archs.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
DSDT for qemu-xen lacks _STA method of PCI slot object. If _STA method
doesn't exist then the slot is assumed to be always present and active
which in conjunction with _EJ0 method makes every device ejectable for
an OS even if it's not the case.
qemu-kvm is able to dynamically add _EJ0 method only to those slots
that either have hotpluggable devices or free for PCI passthrough.
As Xen lacks this capability we cannot use their way.
qemu-xen-traditional DSDT has _STA method which only reports that
the slot is present if there is a PCI devices hotplugged there.
This is done through querying of its PCI hotplug controller.
qemu-xen has similar capability that reports if device is "hotpluggable
or absent" which we can use to achieve the same result.
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
The only use of asm/vpl011.h is protected by the CONFIG_SBSA_VUART_CONSOLE
define so lets protect the include as well.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Guests can issue grant table operations and provide guest controlled
data to them. This data is used for memory loads in helper functions
and macros. To avoid speculative out-of-bound accesses, we use the
array_index_nospec macro where applicable, or the block_speculation
macro.
This is part of the speculative hardening effort.
Signed-off-by: Norbert Manthey <nmanthey@amazon.de>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Also include the only other AVX512ER insn pair, VEXP2P{D,S}.
Note that despite the replacement of the SHA insns' table slots there's
no need to special case their decoding: Their insn-specific code already
sets op_bytes (as was required due to simd_other), and TwoOp is of no
relevance for legacy encoded SIMD insns.
The raising of #UD when EVEX.L'L is 3 for AVX512ER scalar insns is done
to be on the safe side. The SDM does not clarify behavior there, and
it's even more ambiguous here (without AVX512VL in the picture).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Plus their AVX512BW counterparts.
Take the opportunity and also eliminate a pair of open coded instances
of scalar_1op().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Along the lines of prior patches, VCVT{,T}PS2UQQ as well as
VCVT{,T}S{S,D}2USI need "manual" overrides of disp8scale.
The twobyte_table[] entries get altered, with their prior values
now put in place in x86_decode_twobyte().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Some "manual" overrides of disp8scale are needed here again. In
particular code ends up simpler when using d8s_dq64 in the
twobyte_table[] entry.
Test harness additions will be done once the reverse conversions are
also available.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
VCVT{,T}PS2QQ, sharing their main opcodes with others, once again need
"manual" overrides of disp8scale.
While not directly related here, also add a scalar variant of to_wint()
to the test harness.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
VCVT{,T}S{S,D}2SI use EVEX.W for their destination (register) rather
than their (possibly memory) source operand size and hence need a
"manual" override of disp8scale.
While the SDM claims that EVEX.L'L needs to be zero for the 32-bit forms
of VCVT{,U}SI2SD (exception type E10NF), observations on my test system
do not confirm this (and I've got informal confirmation that this is a
doc mistake). Nevertheless, to be on the safe side, force evex.lr to be
zero in this case though when constructing the stub.
Slightly adjust the scalar to_int() in the test harness, to increase the
chances of the operand ending up in memory.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
... including the two AVX512DQ forms which shared encodings, just with
EVEX.W set there.
VCVTDQ2PD, sharing its main opcode with others, needs a "manual"
override of disp8scale.
The simd_size changes for the twobyte_table[] entries are benign to
pre-existing code, but allow decode_disp8scale() to work as is here.
The at this point wrong placement of the 0xe6 case block is once again
in anticipation of further additions of case labels.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
VCVTPS2PD, sharing its main opcode with others, needs a "manual"
override of disp8scale.
The simd_size change for twobyte_table[0x5a] is benign to pre-existing
code, but allows decode_disp8scale() to work as is here.
Also correct the comment on an AVX counterpart.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
There are a number of pointless __packed attributes which cause gcc 9 to
legitimately warn:
utils.c: In function 'vtd_dump_iommu_info':
utils.c:287:33: error: converting a packed 'struct IO_APIC_route_entry' pointer (alignment 1) to a 'struct IO_APIC_route_remap_entry' pointer (alignment 8) may result in an unaligned pointer value [-Werror=address-of-packed-member]
287 | remap = (struct IO_APIC_route_remap_entry *) &rte;
| ^~~~~~~~~~~~~~~~~~~~~~~~~
intremap.c: In function 'ioapic_rte_to_remap_entry':
intremap.c:343:25: error: converting a packed 'struct IO_APIC_route_entry' pointer (alignment 1) to a 'struct IO_APIC_route_remap_entry' pointer (alignment 8) may result in an unaligned pointer value [-Werror=address-of-packed-member]
343 | remap_rte = (struct IO_APIC_route_remap_entry *) old_rte;
| ^~~~~~~~~~~~~~~~~~~~~~~~~
Simply drop these attributes. Take the liberty and also re-format the
structure definitions at the same time.
Reported-by: Charles Arnold <carnold@suse.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
We currently have an asymmetric setup where CONFIG_VERBOSE_DEBUG controls
extra diagnostics for a PV dom0, and opt_dom0_verbose controls extra
diagnostics for a PVH dom0.
Default opt_dom0_verbose to CONFIG_VERBOSE_DEBUG and use opt_dom0_verbose
consistently.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
This would have been very handy when debugging some pv-l1tf issues. As there
is no cost to supporting it, wire it up.
Due to the way dom0 is constructed, switching into shadow mode must be done
after the pagetables are written, and because of partially being in dom0
context, shadow_enable() doesn't like the state it finds.
Reuse the pv_l1tf tasklet for convenience, which will switch dom0 into shadow
mode just before it starts executing.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
For consistency with other command line options.
No functional change.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
One path in dom0_construct_pv() returns -1 unlike all other error paths.
Switch it to returning -EINVAL.
This was last modified by c/s c84481fb XSA-55, but the bug predates that
series. However, this patch did (for no obvious reason) introduce a
bifurcated tail to the function with two subtly different elf_check_broken()
clauses.
As the elf_check_broken() is just a warning and doesn't influence the further
boot, fold the exit paths together and use a single clause.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
x86_cpuid_copy_to_buffer() currently serialises the full content of the
various subleaf unions. While leaves 4, 0xb and 0xd don't have a concrete
max_subleaf field, they do have well defined upper bounds.
Diffing the results of `xen-cpuid -p` shows the resulting saving:
@@ -1,5 +1,5 @@
Xen reports there are maximum 114 leaves and 1 MSRs
-Raw policy: 93 leaves, 1 MSRs
+Raw policy: 38 leaves, 1 MSRs
CPUID:
leaf subleaf -> eax ebx ecx edx
00000000:ffffffff -> 00000016:756e6547:6c65746e:49656e69
@@ -32,7 +32,7 @@ Raw policy: 93 leaves, 1 MSRs
MSRs:
index -> value
000000ce -> 0000000080000000
-Host policy: 93 leaves, 1 MSRs
+Host policy: 33 leaves, 1 MSRs
CPUID:
leaf subleaf -> eax ebx ecx edx
00000000:ffffffff -> 0000000d:756e6547:6c65746e:49656e69
which is mostly due to no longer writing out 64 leaves for xstate when (on
this CoffeeLake system) 8 will do.
Extend the unit tests to cover empty and partially filled subleaf unions.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
This avoids opencoding the slightly-awkward logic. More uses of these
wrappers will be introduced shortly.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Commit 03957f58db "xen/const: Extend the existing macro BIT to take a
suffix in parameter" didn't convert all the callers of the macro BIT.
This will result to a build breakage when enabling Livepatch on arm64.
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Julien Grall <julien.grall@arm.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
No further test harness additions - what is there is good enough for
these rather "regular" insns.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Judging from insn prefixes, these are scalar insns, but their (memory)
operands are vector ones (with the exception of 128-bit VMOVDDUP). For
this some adjustments to disp8scale calculation code are needed.
No explicit test harness additions other than the overrides, as the
compiler already makes use of the insns.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Baodong Chen
Jan Beulich
Andrew Cooper
Petre Pircalabu
Paul Durrant
Juergen Gross
Julien Grall
Tamas K Lengyel
Wei Liu
Alistair Francis
Igor Druzhinin
Norbert Manthey