Jason Andryuk [Thu, 6 May 2021 13:59:13 +0000 (09:59 -0400)]
stubom: newlib: Enable C99 formats for %z
vtpmmgr was changed to print size_t with the %z modifier, but newlib
isn't compiled with %z support. So you get output like:
root seal: zu; sector of 13: zu
root: zu v=zu
itree: 36; sector of 112: zu
group: zu v=zu id=zu md=zu
group seal: zu; 5 in parent: zu; sector of 13: zu
vtpm: zu+zu; sector of 48: zu
Enable the C99 formats in newlib so vtpmmgr prints the numeric values.
Fixes: 9379af08ccc0 ("stubdom: vtpmmgr: Correctly format size_t with %z when printing.")
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Daniel P. Smith <dpsmith@apertussolutions.com>
Jason Andryuk [Thu, 6 May 2021 13:59:12 +0000 (09:59 -0400)]
vtpmmgr: Print error code to aid debugging
tpm_get_error_name returns "Unknown Error Code" when an error string
is not defined. In that case, we should print the Error Code so it can
be looked up offline. tpm_get_error_name returns a const string, so
just have the two callers always print the error code so it is always
available.
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Daniel P. Smith <dpsmith@apertussolutions.com>
Jason Andryuk [Thu, 6 May 2021 13:59:11 +0000 (09:59 -0400)]
docs: Warn about incomplete vtpmmgr TPM 2.0 support
The vtpmmgr TPM 2.0 support is incomplete. Add a warning about that to
the documentation so others don't have to work through discovering it is
broken.
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Daniel P. Smith <dpsmith@apertussolutions.com>
Olaf Hering [Thu, 6 May 2021 15:17:01 +0000 (17:17 +0200)]
tools: fix incorrect suggestions for XENCONSOLED_TRACE on BSD
--log does not take a file, it specifies what is supposed to be logged.
Also separate the XENSTORED and XENCONSOLED variables by a newline.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Fri, 7 May 2021 08:45:14 +0000 (10:45 +0200)]
Arm/optee: don't open-code xzalloc_flex_struct()
The current use of xzalloc_bytes() in optee is nearly an open-coded
version of xzalloc_flex_struct(), which was introduced after the driver
was merged.
The main difference is xzalloc_bytes() will also force the allocation to
be SMP_CACHE_BYTES aligned and therefore avoid sharing the cache line.
While sharing the cache line can have an impact on the performance, this
is also true for most of the other users of x*alloc(), x*alloc_array(),
and x*alloc_flex_struct(). So if we want to prevent sharing cache lines,
arranging for this should be done in the allocator itself.
In this case, we don't need stricter alignment than what the allocator
provides. Hence replace the call to xzalloc_bytes() with one of
xzalloc_flex_struct().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Julien Grall <julien@xen.org>
Acked-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Roger Pau Monné [Fri, 7 May 2021 08:43:29 +0000 (10:43 +0200)]
x86/vhpet: fix RTC special casing
Restore setting the virtual timer callback private data to NULL if the
timer is not level triggered. This fixes the special casing done in
pt_update_irq so that the RTC interrupt when originating from the HPET
is suspended if the interrupt source is masked.
Note the RTC special casing done in pt_update_irq should only apply to
the RTC interrupt originating from the emulated RTC device (which does
set the callback private data), as in that case the callback itself
will destroy the virtual timer if the interrupt is ignored.
While there also use RTC_IRQ instead of 8 when the HPET is configured
in LegacyReplacement Mode.
Fixes: be07023be115 ("x86/vhpet: add support for level triggered interrupts")
Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Jan Beulich [Wed, 5 May 2021 07:07:30 +0000 (09:07 +0200)]
x86/p2m: please Clang after making certain parts HVM-only
Move a few #ifdef-s, to account for diagnostics like
p2m.c:549:1: error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]
which appear despite paging_mode_translate() resolving to constant
"false" when !HVM. All of the affected functions are intended to become
fully HVM-only anyway, with their non-translated stub handling split off
elsewhere.
Fixes: 8d012d3ddffc ("x86/p2m: {get,set}_entry hooks and p2m-pt.c are HVM-only")
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Andrew Cooper [Tue, 4 May 2021 18:40:47 +0000 (19:40 +0100)]
libs/guest: Don't hide the indirection on xc_cpu_policy_t
It is bad form in C, perhaps best demonstrated by trying to read
xc_cpu_policy_destroy(), and causes const qualification to have
less-than-obvious behaviour (the hidden pointer becomes const, not the thing
it points at).
xc_cpu_policy_set_domain() needs to drop its (now normal) const qualification,
as the policy object is modified by the serialisation operation.
This also shows up a problem with the x86_cpu_policies_are_compatible(), where
the intermediate pointers are non-const.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Julien Grall [Wed, 5 May 2021 17:43:06 +0000 (18:43 +0100)]
tools/xl: Use const whenever we point to literal strings
literal strings are not meant to be modified. So we should use const
char * rather than char * when we want to store a pointer to them.
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
Wei Liu [Wed, 5 May 2021 11:45:16 +0000 (11:45 +0000)]
automation: save xen config before building
It is reported that failed randconfig runs are missing the config file
which makes debugging impossible. Fix this by moving the line that
copies the config file before the build is executed.
Signed-off-by: Wei Liu <wl@xen.org>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Andrew Cooper [Fri, 30 Apr 2021 19:17:55 +0000 (20:17 +0100)]
x86/xstate: Rename _xstate_ctxt_size() to hw_uncompressed_size()
The latter is a more descriptive name, as it explicitly highlights the query
from hardware.
Simplify the internal logic using cpuid_count_ebx(), and drop the curr/max
assertion as this property is guaranteed by the x86 ISA.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Andrew Cooper [Fri, 30 Apr 2021 19:17:55 +0000 (20:17 +0100)]
x86/xstate: Elide redundant writes in set_xcr0()
XSETBV is an expensive instruction as, amongst other things, it involves
reconfiguring the instruction decode at the frontend of the pipeline.
We have several paths which reconfigure %xcr0 in quick succession (the context
switch path has 5, including the fpu save/restore helpers), and only a single
caller takes any care to try to skip redundant writes.
Update set_xcr0() to perform amortisation automatically, and simplify the
__context_switch() path as a consequence.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Olaf Hering [Tue, 4 May 2021 14:31:28 +0000 (16:31 +0200)]
tools: handle missing xencommons in xen-init-dom0.service
sysconfig files are not mandatory.
Adjust xen-init-dom0.service to handle a missing sysconfig file by
prepending a dash to the to-be-sourced filename.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Olaf Hering [Tue, 4 May 2021 13:58:54 +0000 (15:58 +0200)]
tools: handle missing xencommons in xenconsoled.service
sysconfig files are not mandatory.
Adjust xenconsoled.service to handle a missing sysconfig file by
prepending a dash to the to-be-sourced filename.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Anthony PERARD [Tue, 4 May 2021 16:14:36 +0000 (17:14 +0100)]
xl: constify cmd_table entries
Also constify cmdtable_len and make use of ARRAY_SIZE, which is
available in "xen-tools/libs.h".
The entries in cmd_table don't need to be modified once xl is running.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Julien Grall <jgrall@amazon.com>
Roger Pau Monne [Wed, 17 Mar 2021 16:09:45 +0000 (17:09 +0100)]
libs/guest: introduce helper to check cpu policy compatibility
Such helpers is just a wrapper to the existing
x86_cpu_policies_are_compatible function. This requires building
policy.c from libx86 on user land also.
No user of the interface introduced.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Wed, 17 Mar 2021 15:59:37 +0000 (16:59 +0100)]
libs/guest: allow updating a cpu policy MSR data
Introduce a helper to update the MSR policy using an array of
xen_msr_entry_t entries. Note the MSRs present in the input
xen_msr_entry_t array will replace any existing entries on the
policy.
No user of the interface introduced on this patch.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Wed, 17 Mar 2021 15:49:55 +0000 (16:49 +0100)]
libs/guest: allow updating a cpu policy CPUID data
Introduce a helper to update the CPUID policy using an array of
xen_cpuid_leaf_t entries. Note the leaves present in the input
xen_cpuid_leaf_t array will replace any existing leaves on the policy.
No user of the interface introduced on this patch.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Thu, 18 Mar 2021 10:11:22 +0000 (11:11 +0100)]
libxl: don't ignore the return value from xc_cpuid_apply_policy
Also change libxl__cpuid_legacy to propagate the error from
xc_cpuid_apply_policy into callers.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
Ian Jackson [Tue, 9 Mar 2021 15:00:47 +0000 (15:00 +0000)]
SUPPORT.md: Document speculative attacks status of non-shim 32-bit PV
This documents, but does not fix, XSA-370.
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: George Dunlap <george.dunlap@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Jan Beulich [Tue, 4 May 2021 08:50:32 +0000 (10:50 +0200)]
x86/xstate: re-use valid_xcr0() for boot-time checks
Instead of (just partially) open-coding it, re-use the function after
suitably moving it up.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Jan Beulich [Tue, 4 May 2021 08:49:59 +0000 (10:49 +0200)]
x86/time: avoid reading the platform timer in rendezvous functions
Reading the platform timer isn't cheap, so we'd better avoid it when the
resulting value is of no interest to anyone.
The consumer of master_stime, obtained by
time_calibration_{std,tsc}_rendezvous() and propagated through
this_cpu(cpu_calibration), is local_time_calibration(). With
CONSTANT_TSC the latter function uses an early exit path, which doesn't
explicitly use the field. While this_cpu(cpu_calibration) (including the
master_stime field) gets propagated to this_cpu(cpu_time).stamp on that
path, both structures' fields get consumed only by the !CONSTANT_TSC
logic of the function.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Tue, 4 May 2021 08:49:22 +0000 (10:49 +0200)]
x86/shim: don't permit HVM and PV_SHIM_EXCLUSIVE at the same time
This combination doesn't really make sense (and there likely are more);
in particular even if the code built with both options set, HVM guests
wouldn't work (and I think one wouldn't be able to create one in the
first place). The alternative here would be some presumably intrusive
#ifdef-ary to get this combination to actually build (but still not
work) again.
Fixes: 8b5b49ceb3d9 ("x86: don't include domctl and alike in shim-exclusive builds")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:31:43 +0000 (15:31 +0200)]
x86emul: support RDPKRU/WRPKRU
Since we support PKU for HVM guests, the respective insns should also be
recognized by the emulator.
In emul_test_read_cr() instead of further extending the comment to
explain the hex numbers, switch to using X86_CR4_* values.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Rahul Singh [Mon, 3 May 2021 13:30:57 +0000 (15:30 +0200)]
iommu: move iommu_update_ire_from_msi() to xen/iommu.h
Move iommu_update_ire_from_msi(..) from passthrough/pci.c to
xen/iommu.h and wrap it under CONFIG_X86 as it is referenced in x86
code only to avoid compilation error for other architecture when
HAS_PCI is enabled.
No functional change intended.
Signed-off-by: Rahul Singh <rahul.singh@arm.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Jan Beulich [Mon, 3 May 2021 13:30:16 +0000 (15:30 +0200)]
x86/p2m: re-arrange struct p2m_domain
Combine two HVM-specific sections in two cases (i.e. going from four of
them to just two). Make defer_nested_flush bool and HVM-only, moving it
next to other nested stuff. Move default_access up into a padding hole.
When moving them anyway, also adjust comment style.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:29:49 +0000 (15:29 +0200)]
x86/p2m: write_p2m_entry_{pre,post} hooks are HVM-only
Move respective shadow code to its HVM-only source file, thus making it
possible to exclude the hooks as well. This then shows that
shadow_p2m_init() also isn't needed in !HVM builds.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tim Deegan <tim@xen.org>
Jan Beulich [Mon, 3 May 2021 13:29:24 +0000 (15:29 +0200)]
x86/p2m: {get,set}_entry hooks and p2m-pt.c are HVM-only
With the hooks no longer needing setting, p2m_pt_init() degenerates to
(about) nothing when !HVM. As a result, p2m-pt.c doesn't need building
anymore in this case, as long as p2m_pt_init() has proper surrogates put
in place.
Unfortunately this means some new #ifdef-ary in p2m.c, but the mid-term
plan there is to get rid of (almost) all of it by splitting out the then
hopefully very few remaining non-HVM pieces.
While the movement of the paging_mode_translate() check from
p2m_remove_page() to guest_physmap_remove_page() may not be strictly
necessary anymore (it was in an early version of this change), it looks
more logical to live in the latter function, allowing to avoid acquiring
the lock in the PV case. All other callers of p2m_remove_page() already
have such a check anyway (in the altp2m case up the call stack).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:28:53 +0000 (15:28 +0200)]
x86: make mem-paging configurable and default it to off
... for being unsupported.
While doing so, make the option dependent upon HVM, which really is the
main purpose of the change.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Alexandru Isaila <aisaila@bitdefender.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:28:33 +0000 (15:28 +0200)]
x86/p2m: the recalc hook is HVM-only
Exclude functions involved in its use from !HVM builds, thus making it
possible to exclude the hook as well.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:28:16 +0000 (15:28 +0200)]
x86/p2m: hardware-log-dirty related hooks are HVM-only
Exclude functions using them from !HVM builds, thus making it possible
to exclude the hooks as well.
By moving an #endif in p2m.c (instead of introducing yet another one)
p2m_{get,set}_ioreq_server() get excluded for !HVM builds as well.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:27:56 +0000 (15:27 +0200)]
x86/p2m: change_entry_type_* hooks are HVM-only
Exclude functions using them from !HVM builds, thus making it possible
to exclude the hooks as well. Also cover the already unused
memory_type_changed hook while inserting the #ifdef in the struct.
While no respective check was there, I can't see how
XEN_DOMCTL_set_broken_page_p2m could have been meant to work for PV the
way it is implemented. Restrict this operation to acting on HVM guests.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:27:42 +0000 (15:27 +0200)]
AMD/IOMMU: guest IOMMU support is for HVM only
Generally all of this is dead code anyway, but there's a caller of
guest_iommu_add_ppr_log(), and the code itself calls
p2m_change_type_one(), which is about to become HVM-only. Hence this
code, short of deleting it altogether, needs to become properly HVM-
only as well.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:27:21 +0000 (15:27 +0200)]
x86/mm: the gva_to_gfn() hook is HVM-only
As is the adjacent ga_to_gfn() one as well as paging_gva_to_gfn().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tim Deegan <tim@xen.org>
Jan Beulich [Mon, 3 May 2021 13:26:08 +0000 (15:26 +0200)]
x86/p2m: {,un}map_mmio_regions() are HVM-only
Mirror the "translated" check the functions do to do_domctl(), allowing
the calls to be DCEd by the compiler. Add ASSERT_UNREACHABLE() to the
original checks.
Also arrange for {set,clear}_mmio_p2m_entry() and
{set,clear}_identity_p2m_entry() to respectively live next to each
other, such that clear_mmio_p2m_entry() can also be covered by the
#ifdef already covering set_mmio_p2m_entry().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 3 May 2021 13:17:19 +0000 (15:17 +0200)]
x86/p2m: set_{foreign,mmio}_p2m_entry() are HVM-only
Extend a respective #ifdef from inside set_typed_p2m_entry() to around
all three functions. Add ASSERT_UNREACHABLE() to the latter one's safety
check path.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Andrew Cooper [Tue, 21 Apr 2020 16:43:56 +0000 (17:43 +0100)]
x86/svm: Enumeration for CET
On CET-capable hardware, VMRUN/EXIT unconditionally swaps S_CET, SSP and
ISST (subject to cleanbits) without further settings.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Andrew Cooper [Tue, 21 Apr 2020 16:43:56 +0000 (17:43 +0100)]
x86/hvm: Introduce control register handling for CET
Allow CR4.CET to be set, based on the CPUID policy (although these bits are
not selectable yet for VMs). CR4.CET needs interlocing with CR0.WP to
prohibit CET && !WP as a legal combination.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Andrew Cooper [Thu, 29 Apr 2021 13:28:43 +0000 (14:28 +0100)]
x86: Always have CR4.PKE set in HVM context
The sole user of read_pkru() is the emulated pagewalk, and guarded behind
guest_pku_enabled() which restricts the path to HVM (hap, even) context only.
The commentary in read_pkru() concerning _PAGE_GNTTAB overlapping with
_PAGE_PKEY_BITS is only applicable to PV guests.
The context switch path, via write_ptbase() unconditionally writes CR4 on any
context switch.
Therefore, we can guarantee to separate CR4.PKE between PV and HVM context at
no extra cost. Set PKE in mmu_cr4_features on boot, so it becomes set in HVM
context, and clear it in pv_make_cr4().
Rename read_pkru() to rdpkru() now that it is a simple wrapper around the
instruction. This saves two CR4 writes on every pagewalk, which typically
occur more than one per emulation.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Roger Pau Monne [Tue, 13 Apr 2021 12:51:44 +0000 (14:51 +0200)]
tests/cpu-policy: add sorted MSR test
Further changes will rely on MSR entries being sorted, so add a test
to assert it.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Wed, 17 Mar 2021 14:30:57 +0000 (15:30 +0100)]
libs/guest: introduce a helper to apply a cpu policy to a domain
Such helper is very similar to the existing xc_set_domain_cpu_policy
interface, but takes an opaque xc_cpu_policy_t instead of arrays of
CPUID leaves and MSRs.
No callers of the interface introduced in this patch.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Mon, 22 Mar 2021 10:59:04 +0000 (11:59 +0100)]
tools: switch existing users of xc_get_{system,domain}_cpu_policy
With the introduction of xc_cpu_policy_get_{system,domain} and
xc_cpu_policy_serialise the current users of
xc_get_{system,domain}_cpu_policy can be switched to the new
interface.
Note that xc_get_{system,domain}_cpu_policy is removed from the public
interface and the functions are made static, since there are still
internal consumers in xg_cpuid_x86.c
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Wed, 17 Mar 2021 14:31:50 +0000 (15:31 +0100)]
libs/guest: introduce helper to serialize a cpu policy
Such helper allow converting a cpu policy into an array of
xen_cpuid_leaf_t and xen_msr_entry_t elements, which matches the
current interface of the CPUID/MSR functions. This is required in
order for the user to be able to parse the CPUID/MSR data.
No user of the interface introduced in this patch.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Roger Pau Monne [Wed, 17 Mar 2021 13:46:11 +0000 (14:46 +0100)]
libs/guest: introduce helper to fetch a domain cpu policy
Such helper is based on the existing functions to fetch a CPUID and
MSR policies, but uses the xc_cpu_policy_t type to return the data to
the caller.
No user of the interface introduced on the patch.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Wed, 17 Mar 2021 13:45:41 +0000 (14:45 +0100)]
libs/guest: introduce helper to fetch a system cpu policy
Such helper is based on the existing functions to fetch a CPUID and
MSR policies, but uses the xc_cpu_policy_t type to return the data to
the caller.
Note some helper functions are introduced, those are split from
xc_cpu_policy_get_system because they will be used by other functions
also.
No user of the interface introduced on the patch.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Tue, 16 Mar 2021 15:39:00 +0000 (16:39 +0100)]
libs/guest: introduce xc_cpu_policy_t
Introduce an opaque type that is used to store the CPUID and MSRs
policies of a domain. Such type uses the existing {cpuid,msr}_policy
structures to store the data, but doesn't expose the type to the users
of the xenguest library. There are also two arrays to allow for easier
serialization without requiring an allocation each time.
Introduce an allocation (init) and freeing function (destroy) to
manage the type.
Note the type is not yet used anywhere.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monne [Mon, 22 Mar 2021 09:37:35 +0000 (10:37 +0100)]
libs/guest: rename xc_get_cpu_policy_size to xc_cpu_policy_get_size
Preparatory change to introduce a new set of xc_cpu_policy_* functions
that will replace the current CPUID/MSR helpers.
No functional change intended.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monné [Thu, 29 Apr 2021 14:05:00 +0000 (16:05 +0200)]
x86/oprofile: remove compat accessors usage from backtrace
Remove the unneeded usage of the compat layer to copy frame pointers
from guest address space. Instead just use raw_copy_from_guest.
While there change the accessibility check of one frame_head beyond to
be performed as part of the copy, like it's done in the Linux code in
5.11 and earlier versions. Note it's unclear why this is needed.
Also drop the explicit truncation of the head pointer in the 32bit
case as all callers already pass a zero extended value. The first
value being rsp from the guest registers, and further calls will use
ebp from frame_head_32bit struct.
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Jan Beulich [Thu, 29 Apr 2021 14:04:35 +0000 (16:04 +0200)]
x86: correct comment about alternatives ordering
Unlike Linux, Xen has never (so far) used alternatives patching for
memcpy() or memset(), even less such utilizing multiple alternatives.
Correct the Linux-inherited comment to match reality.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Roger Pau Monné [Thu, 29 Apr 2021 14:04:11 +0000 (16:04 +0200)]
x86/cpuid: do not expand max leaves on restore
When restoring limit the maximum leaves to the ones supported by Xen
4.12 in order to not expand the maximum leaves a guests sees. Note
this is unlikely to cause real issues.
Guests restored from Xen versions 4.13 or greater will contain CPUID
data on the stream that will override the values set by
xc_cpuid_apply_policy.
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Jan Beulich [Thu, 29 Apr 2021 14:03:38 +0000 (16:03 +0200)]
xen/decompress: drop STATIC and INIT
Except for one last instance, all users have been removed in earlier
changes.
Requested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 29 Apr 2021 14:02:59 +0000 (16:02 +0200)]
unzstd: replace INIT and STATIC
With xen/common/decompress.h now agreeing in both build modes about
what STATIC expands to, there's no need for these abstractions anymore.
Requested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Tue, 27 Apr 2021 12:36:13 +0000 (14:36 +0200)]
x86/shadow: streamline shadow_get_page_from_l1e()
Trying get_page_from_l1e() up to three times isn't helpful; in debug
builds it may lead to log messages making things look as if there was a
problem somewhere. And there's no need to have more than one try: The
function can only possibly succeed for one domain passed as 3rd
argument (unless the page is an MMIO one to which both have access,
but MMIO pages should be "got" by specifying the requesting domain
anyway). Re-arrange things so just the one call gets made which has a
chance of succeeding.
The code could in principle be arranged such that there's only a single
call to get_page_from_l1e(), but the conditional would become pretty
complex then and hence hard to follow / understand / adjust.
The redundant (with shadow_mode_refcounts()) shadow_mode_translate()
gets dropped.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tim Deegan <tim@xen.org>
Jan Beulich [Tue, 27 Apr 2021 12:35:49 +0000 (14:35 +0200)]
x86/shadow: re-use variables in shadow_get_page_from_l1e()
There's little point in doing multiple mfn_to_page() or page_get_owner()
on all the same MFN. Calculate them once at the start of the function.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tim Deegan <tim@xen.org>
Jan Beulich [Tue, 27 Apr 2021 12:34:59 +0000 (14:34 +0200)]
VMX: use a single, global APIC access page
The address of this page is used by the CPU only to recognize when to
access the virtual APIC page instead. No accesses would ever go to this
page. It only needs to be present in the (CPU) page tables so that
address translation will produce its address as result for respective
accesses.
By making this page global, we also eliminate the need to refcount it,
or to assign it to any domain in the first place.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Tim Deegan <tim@xen.org>
Jan Beulich [Mon, 26 Apr 2021 08:26:04 +0000 (10:26 +0200)]
x86/EFI: don't have an overly large image size
While without debug info the difference is benign (so far), since we pad
the image to 16Mb anyway, forcing the .reloc section to a 2Mb boundary
causes subsequent .debug_* sections to go farther beyond 16Mb than
needed. There's no reason to advance . for establishing __2M_rwdata_end,
as all data past _end is of no interest at runtime anymore anyway.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 26 Apr 2021 08:25:10 +0000 (10:25 +0200)]
x86/EFI: keep debug info in xen.efi
... provided the linker supports it (which it does as of commit
2dfa8341e079 ["ELF DWARF in PE output"]).
Without mentioning debugging sections, the linker would put them at
VA 0, thus making them unreachable by 32-bit (relative or absolute)
relocations. If relocations were resolvable (or absent) the resulting
binary would have invalid section RVAs (0 - __image_base__, truncated to
32 bits). Mentioning debugging sections without specifying an address
will result in the linker putting them all on the same RVA. A loader is,
afaict, free to reject loading such an image, as sections shouldn't
overlap. (The above describes GNU ld 2.36 behavior, which - if deemed
buggy - could change.)
Make sure our up-to-16Mb padding doesn't unnecessarily further extend
the image.
Take the opportunity and also switch to using $(call ld-option,...).
Requested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Jan Beulich [Mon, 26 Apr 2021 08:24:20 +0000 (10:24 +0200)]
x86/EFI: sections may not live at VA 0 in PE binaries
PE binaries specify section addresses by (32-bit) RVA. GNU ld up to at
least 2.36 would silently truncate the (negative) difference when a
section is placed below the image base. Such sections would also be
wrongly placed ahead of all "normal" ones. Since, for the time being,
we build xen.efi with --strip-debug anyway, .stab* can't appear. And
.comment has an entry in /DISCARD/ already anyway in the EFI case.
Because of their unclear origin, keep the directives for the ELF case
though.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Igor Druzhinin [Mon, 26 Apr 2021 08:22:48 +0000 (10:22 +0200)]
x86/intel: insert Ice Lake-SP and Ice Lake-D model numbers
LBR, C-state MSRs should correspond to Ice Lake desktop according to
SDM rev. 74 for both models.
Ice Lake-SP is known to expose IF_PSCHANGE_MC_NO in IA32_ARCH_CAPABILITIES MSR
(as advisory tells and Whitley SDP confirms) which means the erratum is fixed
in hardware for that model and therefore it shouldn't be present in
has_if_pschange_mc list. Provisionally assume the same to be the case
for Ice Lake-D.
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Igor Druzhinin [Mon, 26 Apr 2021 08:22:04 +0000 (10:22 +0200)]
x86/vtx: add LBR_SELECT to the list of LBR MSRs
This MSR exists since Nehalem / Silvermont and is actively used by Linux,
for instance, to improve sampling efficiency.
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Igor Druzhinin [Mon, 26 Apr 2021 08:21:09 +0000 (10:21 +0200)]
x86/vPMU: Extend vPMU support to version 5
Version 5 is backwards compatible with version 3. This allows to enable
vPMU on Ice Lake CPUs.
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Chao Gao [Mon, 26 Apr 2021 08:16:50 +0000 (10:16 +0200)]
VT-d: Don't assume register-based invalidation is always supported
According to Intel VT-d SPEC rev3.3 Section 6.5, Register-based Invalidation
isn't supported by Intel VT-d version 6 and beyond.
This hardware change impacts following two scenarios: admin can disable
queued invalidation via 'qinval' cmdline and use register-based interface;
VT-d switches to register-based invalidation when queued invalidation needs
to be disabled, for example, during disabling x2apic or during system
suspension or after enabling queued invalidation fails.
To deal with this hardware change, if register-based invalidation isn't
supported, queued invalidation cannot be disabled through Xen cmdline; and
if queued invalidation has to be disabled temporarily in some scenarios,
VT-d won't switch to register-based interface but use some dummy functions
to catch errors in case there is any invalidation request issued when queued
invalidation is disabled.
Signed-off-by: Chao Gao <chao.gao@intel.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Julien Grall [Wed, 21 Apr 2021 13:56:38 +0000 (14:56 +0100)]
tools/xenstored: Wire properly the command line option -M/--path-max
The command line option -M/--path-max was meant to be added by
commit
924bf8c793cb "tools/xenstore: rework path length check" but this
wasn't wired through properly.
Fix it by adding the missing "case 'M':".
Fixes: 924bf8c793cb ("tools/xenstore: rework path length check")
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Julien Grall [Tue, 20 Apr 2021 13:46:06 +0000 (14:46 +0100)]
tools/xenstored: Remove unused prototype
A prototype for dump_conn() has been present for quite a long time
but there are no implementation. Even, AFAICT in the patch that
introduced it. So drop it.
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Jan Beulich [Fri, 16 Apr 2021 12:32:46 +0000 (14:32 +0200)]
x86/shadow: depend on PV || HVM
With the building of guest_?.o now depending on PV or HVM, without
further #ifdef-ary shadow code won't link anymore when !PV && !HVM.
Since this isn't a useful configuration anyway, exclude shadow code from
being built in this case.
Fixes: aff8bf94ce65 ("x86/shadow: only 4-level guest code needs building when !HVM")
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Roger Pau Monné [Fri, 23 Apr 2021 13:58:37 +0000 (15:58 +0200)]
x86/pv: fix clang build without CONFIG_PV32
Clang reports the following build error without CONFIG_PV32:
hypercall.c:253:10: error: variable 'op' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
if ( !is_pv_32bit_vcpu(curr) )
^~~~~~~~~~~~~~~~~~~~~~~
hypercall.c:282:21: note: uninitialized use occurs here
return unlikely(op == __HYPERVISOR_iret)
^~
/root/src/xen/xen/include/xen/compiler.h:21:43: note: expanded from macro 'unlikely'
#define unlikely(x) __builtin_expect(!!(x),0)
^
hypercall.c:253:5: note: remove the 'if' if its condition is always true
if ( !is_pv_32bit_vcpu(curr) )
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hypercall.c:251:21: note: initialize the variable 'op' to silence this warning
unsigned long op;
^
= 0
Rearrange the code in arch_do_multicall_call so that the if guards the
32bit branch and when CONFIG_PV32 is not set there's no conditional at
all.
Fixes: 527922008bc ('x86: slim down hypercall handling when !PV32')
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Jan Beulich [Fri, 23 Apr 2021 13:57:27 +0000 (15:57 +0200)]
x86/oprof: fix !HVM && !PV32 build
clang, at the very least, doesn't like unused inline functions, unless
their definitions live in a header.
Fixes: d23d792478 ("x86: avoid building COMPAT code when !HVM && !PV32")
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Roger Pau Monné [Thu, 15 Apr 2021 14:47:31 +0000 (16:47 +0200)]
x86/cpuid: support LFENCE always serialising CPUID bit
AMD Milan (Zen3) CPUs have an LFENCE Always Serialising CPUID bit in
leaf
80000021.eax. Previous AMD versions used to have a user settable
bit in DE_CFG MSR to select whether LFENCE was dispatch serialising,
which Xen always attempts to set. The forcefully always on setting is
due to the addition of SEV-SNP so that a VMM cannot break the
confidentiality of a guest.
In order to support this new CPUID bit move the LFENCE_DISPATCH
synthetic CPUID bit to map the hardware bit (leaving a hole in the
synthetic range) and either rely on the bit already being set by the
native CPUID output, or attempt to fake it in Xen by modifying the
DE_CFG MSR. This requires adding one more entry to the featureset to
support leaf
80000021.eax.
The bit is always exposed to guests by default even if the underlying
hardware doesn't support leaf
80000021. Note that Xen doesn't allow
guests to change the DE_CFG value, so once set by Xen LFENCE will always
be serialising.
Note that the access to DE_CFG by guests is left as-is: reads will
unconditionally return LFENCE_SERIALISE bit set, while writes are
silently dropped.
Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
[Always expose to guests by default]
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Hongyan Xia [Thu, 22 Apr 2021 17:42:30 +0000 (18:42 +0100)]
x86/mm: fix wrong unmap call
Commit 'x86/mm: switch to new APIs in modify_xen_mappings' applied the
hunk of the unmap call to map_pages_to_xen() which was wrong and clearly
should have been at the end of modify_xen_mappings(). Fix.
Fixes: dd68f2e49bea ("x86/mm: switch to new APIs in modify_xen_mappings")
Signed-off-by: Hongyan Xia <hongyxia@amazon.com>
Tested-by: Julien Grall <jgrall@amazon.com>
Tested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Dario Faggioli [Wed, 31 Jul 2019 16:58:51 +0000 (18:58 +0200)]
automation: build in openSUSE Tumbleweed
Mark the tests as non-fatal, as Tumbleweed is a bleeding edge rolling release.
Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
Acked-by: Doug Goldstein <cardoe@cardoe.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Jan Beulich [Thu, 22 Apr 2021 12:53:21 +0000 (14:53 +0200)]
lib: move strsep()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:53:10 +0000 (14:53 +0200)]
lib: move strpbrk()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:52:57 +0000 (14:52 +0200)]
lib: move strspn()
Allow the function to be individually linkable, discardable, and
overridable. In fact the function is unused at present, and hence will
now get omitted from the final binaries.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:51:47 +0000 (14:51 +0200)]
lib: move/rename strnicmp() to strncasecmp()
While moving the implementation, also rename it to match strcasecmp(),
allowing the similar use of a compiler builtin in this case as well.
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:51:08 +0000 (14:51 +0200)]
lib: move strcasecmp()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:50:54 +0000 (14:50 +0200)]
lib: move strstr()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:50:44 +0000 (14:50 +0200)]
lib: move strrchr()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:50:25 +0000 (14:50 +0200)]
lib: move strchr()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:49:10 +0000 (14:49 +0200)]
lib: move strlcat()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:48:59 +0000 (14:48 +0200)]
lib: move strlcpy()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:48:38 +0000 (14:48 +0200)]
lib: move strncmp()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:48:25 +0000 (14:48 +0200)]
lib: move strcmp()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:48:14 +0000 (14:48 +0200)]
lib: move strnlen()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:48:01 +0000 (14:48 +0200)]
lib: move strlen()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:45:33 +0000 (14:45 +0200)]
lib: move memchr_inv()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:45:21 +0000 (14:45 +0200)]
lib: move memchr()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:45:06 +0000 (14:45 +0200)]
lib: move memcmp()
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:44:53 +0000 (14:44 +0200)]
lib: move memmove()
By moving the function into an archive, x86 doesn't need to announce
anymore that is has its own implementation - symbol resolution by the
linker will now guarantee that the generic function remains unused, and
the forwarding to the compiler built-in gets done by the common header
anyway.
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:44:35 +0000 (14:44 +0200)]
lib: move memcpy()
By moving the function into an archive, x86 doesn't need to announce
anymore that is has its own implementation - symbol resolution by the
linker will now guarantee that the generic function remains unused, and
the forwarding to the compiler built-in gets done by the common header
anyway.
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:42:31 +0000 (14:42 +0200)]
lib: move memset()
By moving the function into an archive, x86 doesn't need to announce
anymore that is has its own implementation - symbol resolution by the
linker will now guarantee that the generic function remains unused, and
the forwarding to the compiler built-in gets done by the common header
anyway.
Allow the function to be individually linkable, discardable, and
overridable.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>
Jan Beulich [Thu, 22 Apr 2021 12:39:24 +0000 (14:39 +0200)]
x86/CPUID: shrink max_{,sub}leaf fields according to actual leaf contents
Zapping leaf data for out of range leaves is just one half of it: To
avoid guests (bogusly or worse) inferring information from mere leaf
presence, also shrink maximum indicators such that the respective
trailing entry is not all blank (unless of course it's the initial
subleaf of a leaf that's not the final one).
This is also in preparation of bumping the maximum basic leaf we
support, to ensure guests not getting exposed related features won't
observe a change in behavior.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Costin Lupu [Mon, 19 Apr 2021 13:01:42 +0000 (16:01 +0300)]
tools/libs/light: Remove unnecessary libxl_list_vm() call
The removed lines were initially added by commit
314e64084d31, but the
subsequent code which was using the nb_vm variable was later removed by
commit
2ba368d13893, which makes these lines of code an overlooked
reminiscence. Moreover, the call becomes very expensive when there is a
considerable number of VMs (~1000 instances) running on the host.
Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro>
Acked-by: Wei Liu <wl@xen.org>
Andrew Cooper [Wed, 21 Apr 2021 09:16:13 +0000 (10:16 +0100)]
CI: Drop TravisCI
Travis-ci.org is shutting down shortly. The arm cross-compile testing has
been broken for a long time now, and all testing has now been superseded by
our Gitlab infrastructure.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wl@xen.org>
Andrew Cooper [Mon, 19 Apr 2021 14:33:05 +0000 (15:33 +0100)]
x86/shim: Simplify compat handling in write_start_info()
Factor out a compat boolean to remove the lfence overhead from multiple
is_pv_32bit_domain() calls.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Wei Liu [Thu, 22 Apr 2021 12:14:52 +0000 (14:14 +0200)]
x86/mm: drop _new suffix for page table APIs
No functional change.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Hongyan Xia <hongyxia@amazon.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Hongyan Xia [Thu, 22 Apr 2021 12:14:41 +0000 (14:14 +0200)]
x86: switch to use domheap page for page tables
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Hongyan Xia <hongyxia@amazon.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Hongyan Xia [Thu, 22 Apr 2021 12:14:22 +0000 (14:14 +0200)]
x86/mm: drop old page table APIs
Two sets of old APIs, alloc/free_xen_pagetable() and lXe_to_lYe(), are
now dropped to avoid the dependency on direct map.
There are two special cases which still have not been re-written into
the new APIs, thus need special treatment:
rpt in smpboot.c cannot use ephemeral mappings yet. The problem is that
rpt is read and written in context switch code, but the mapping
infrastructure is NOT context-switch-safe, meaning we cannot map rpt in
one domain and unmap in another. Before the mapping infrastructure
supports context switches, rpt has to be globally mapped.
Also, lXe_to_lYe() during Xen image relocation cannot be converted into
map/unmap pairs. We cannot hold on to mappings while the mapping
infrastructure is being relocated! It is enough to remove the direct map
in the second e820 pass, so we still use the direct map (<4GiB) in Xen
relocation (which is during the first e820 pass).
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Hongyan Xia <hongyxia@amazon.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Wei Liu [Thu, 22 Apr 2021 12:14:13 +0000 (14:14 +0200)]
x86/smpboot: switch clone_mapping() to new APIs
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Hongyan Xia <hongyxia@amazon.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Wei Liu [Thu, 22 Apr 2021 12:14:03 +0000 (14:14 +0200)]
x86/smpboot: add exit path for clone_mapping()
We will soon need to clean up page table mappings in the exit path.
No functional change.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Hongyan Xia <hongyxia@amazon.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Wei Liu [Thu, 22 Apr 2021 12:13:54 +0000 (14:13 +0200)]
efi: switch to new APIs in EFI code
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Hongyan Xia <hongyxia@amazon.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>