Commit Graph

112947 Commits

Author SHA1 Message Date
Fabiano Rosas
c55deb860c migration: Deprecate fd: for file migration
The fd: URI can currently trigger two different types of migration, a
TCP migration using sockets and a file migration using a plain
file. This is in conflict with the recently introduced (8.2) QMP
migrate API that takes structured data as JSON-like format. We cannot
keep the same backend for both types of migration because with the new
API the code is more tightly coupled to the type of transport. This
means a TCP migration must use the 'socket' transport and a file
migration must use the 'file' transport.

If we keep allowing fd: when using a file, this creates an issue when
the user converts the old-style (fd:) to the new style ("transport":
"socket") invocation because the file descriptor in question has
previously been allowed to be either a plain file or a socket.

To avoid creating too much confusion, we can simply deprecate the fd:
+ file usage, which is thought to be rarely used currently and instead
establish a 1:1 correspondence between fd: URI and socket transport,
and file: URI and file transport.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:59 -03:00
Fabiano Rosas
0222111a22 migration: Remove non-multifd compression
The 'compress' migration capability enables the old compression code
which has shown issues over the years and is thought to be less stable
and tested than the more recent multifd-based compression. The old
compression code has been deprecated in 8.2 and now is time to remove
it.

Deprecation commit 864128df46 ("migration: Deprecate old compression
method").

Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:59 -03:00
Fabiano Rosas
eef0bae3a7 migration: Remove block migration
The block migration has been considered obsolete since QEMU 8.2 in
favor of the more flexible storage migration provided by the
blockdev-mirror driver. Two releases have passed so now it's time to
remove it.

Deprecation commit 66db46ca83 ("migration: Deprecate block
migration").

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:58 -03:00
Fabiano Rosas
18d154f575 migration: Remove 'blk/-b' option from migrate commands
The block migration is considered obsolete and has been deprecated in
8.2. Remove the migrate command option that enables it. This only
affects the QMP and HMP commands, the feature can still be accessed by
setting the migration 'block' capability. The whole feature will be
removed in a future patch.

Deprecation commit 8846b5bfca ("migration: migrate 'blk' command
option is deprecated.").

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:58 -03:00
Fabiano Rosas
61c4e39f73 migration: Remove 'inc' option from migrate command
The block incremental option for block migration has been deprecated
in 8.2 in favor of using the block-mirror feature. Remove it now.

Deprecation commit 40101f320d ("migration: migrate 'inc' command
option is deprecated.").

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:58 -03:00
Fabiano Rosas
f7b1cd3c2e migration: Remove 'skipped' field from MigrationStats
The 'skipped' field of the MigrationStats struct has been deprecated
in 8.1. Time to remove it.

Deprecation commit 7b24d32634 ("migration: skipped field is really
obsolete.").

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:58 -03:00
Vladimir Sementsov-Ogievskiy
dbea1c89da qapi: introduce exit-on-error parameter for migrate-incoming
Now we do set MIGRATION_FAILED state, but don't give a chance to
orchestrator to query migration state and get the error.

Let's provide a possibility for QMP-based orchestrators to get an error
like with outgoing migration.

For hmp_migrate_incoming(), let's enable the new behavior: HMP is not
and ABI, it's mostly intended to use by developer and it makes sense
not to stop the process.

For x-exit-preconfig, let's keep the old behavior:
 - it's called from init(), so here we want to keep current behavior by
   default
 - it does exit on error by itself as well
So, if we want to change the behavior of x-exit-preconfig, it should be
another patch.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:58 -03:00
Vladimir Sementsov-Ogievskiy
f84eaa9ffd migration: process_incoming_migration_co(): rework error reporting
Unify error reporting in the function. This simplifies the following
commit, which will not-exit-on-error behavior variant to the function.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:58 -03:00
Vladimir Sementsov-Ogievskiy
30116e9079 migration: process_incoming_migration_co(): fix reporting s->error
It's bad idea to leave critical section with error object freed, but
s->error still set, this theoretically may lead to use-after-free
crash. Let's avoid it.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:57 -03:00
Vladimir Sementsov-Ogievskiy
246f54e0cc migration: process_incoming_migration_co(): complete cleanup on failure
Make call to migration_incoming_state_destroy(), instead of doing only
partial of it.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:57 -03:00
Vladimir Sementsov-Ogievskiy
d4a17b8f1d migration: move trace-point from migrate_fd_error to migrate_set_error
Cover more cases by trace-point.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:57 -03:00
Will Gyda
62663f08a7 migration/ram.c: API Conversion qemu_mutex_lock(), and qemu_mutex_unlock() to WITH_QEMU_LOCK_GUARD macro
migration/ram.c: API Conversion qemu_mutex_lock(),
and qemu_mutex_unlock() to WITH_QEMU_LOCK_GUARD macro

Signed-off-by: Will Gyda <vilhelmgyda@gmail.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2024-05-08 09:20:57 -03:00
Richard Henderson
4e66a08546 * target/i386/tcg: conversion of one byte opcodes to table-based decoder
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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* target/i386/tcg: conversion of one byte opcodes to table-based decoder

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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (26 commits)
  target/i386: remove duplicate prefix decoding
  target/i386: split legacy decoder into a separate function
  target/i386: decode x87 instructions in a separate function
  target/i386: remove now-converted opcodes from old decoder
  target/i386: port extensions of one-byte opcodes to new decoder
  target/i386: move BSWAP to new decoder
  target/i386: move remaining conditional operations to new decoder
  target/i386: merge and enlarge a few ranges for call to disas_insn_new
  target/i386: move C0-FF opcodes to new decoder (except for x87)
  target/i386: generalize gen_movl_seg_T0
  target/i386: move 60-BF opcodes to new decoder
  target/i386: allow instructions with more than one immediate
  target/i386: extract gen_far_call/jmp, reordering temporaries
  target/i386: move 00-5F opcodes to new decoder
  target/i386: reintroduce debugging mechanism
  target/i386: cleanup *gen_eob*
  target/i386: clarify the "reg" argument of functions returning CCPrepare
  target/i386: do not use s->T0 and s->T1 as scratch registers for CCPrepare
  target/i386: extend cc_* when using them to compute flags
  target/i386: pull cc_op update to callers of gen_jmp_rel{,_csize}
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-07 09:26:30 -07:00
Richard Henderson
571882c668 tcg: Add write_aofs to GVecGen3i
tcg/i386: Simplify immediate 8-bit logical vector shifts
 tcg/i386: Optimize setcond of TST{EQ,NE} with 0xffffffff
 tcg/optimize: Optimize setcond with zmask
 accel/tcg: Introduce CF_BP_PAGE
 target/sh4: Update DisasContextBase.insn_start
 gitlab: Drop --static from s390x linux-user build
 gitlab: Streamline ubuntu-22.04-s390x
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Merge tag 'pull-tcg-20240507' of https://gitlab.com/rth7680/qemu into staging

tcg: Add write_aofs to GVecGen3i
tcg/i386: Simplify immediate 8-bit logical vector shifts
tcg/i386: Optimize setcond of TST{EQ,NE} with 0xffffffff
tcg/optimize: Optimize setcond with zmask
accel/tcg: Introduce CF_BP_PAGE
target/sh4: Update DisasContextBase.insn_start
gitlab: Drop --static from s390x linux-user build
gitlab: Streamline ubuntu-22.04-s390x

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* tag 'pull-tcg-20240507' of https://gitlab.com/rth7680/qemu:
  gitlab: Streamline ubuntu-22.04-s390x
  gitlab: Drop --static from s390x linux-user build
  gitlab: Drop --disable-libssh from ubuntu-22.04-s390x.yml
  target/sh4: Update DisasContextBase.insn_start
  accel/tcg: Introduce CF_BP_PAGE
  tcg/optimize: Optimize setcond with zmask
  tcg/i386: Optimize setcond of TST{EQ,NE} with 0xffffffff
  tcg/i386: Simplify immediate 8-bit logical vector shifts
  tcg: Add write_aofs to GVecGen3i

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-07 07:34:58 -07:00
Paolo Bonzini
d4e6d40c36 target/i386: remove duplicate prefix decoding
Now that a bulk of opcodes go through the new decoder, it is sensible
to do some cleanup.  Go immediately through disas_insn_new and only jump
back after parsing the prefixes.

disas_insn() now only contains the three sigsetjmp cases, and they
are more easily managed if they are inlined into i386_tr_translate_insn.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
ef309ec2a6 target/i386: split legacy decoder into a separate function
Split the bits that have some duplication with disas_insn_new, from
those that should be the main topic of the conversion.  This is the
first step towards removing duplicate decoding of prefixes between
disas_insn and disas_insn_new.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
7795b455dd target/i386: decode x87 instructions in a separate function
These are unlikely to be converted to the table-based decoding
soon (perhaps there could be generic ESC decoding in decode-new.c.inc
for the Mod/RM byte, but not operand decoding), so keep them separate
from the remaining legacy-decoded instructions.

Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
aef4f4affd target/i386: remove now-converted opcodes from old decoder
Send all converted opcodes to disas_insn_new() directly from the big
decoding switch statement; once more, the debugging/bisecting logic
disappears.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
3519b813e1 target/i386: port extensions of one-byte opcodes to new decoder
A few two-byte opcodes are simple extensions of existing one-byte opcodes;
they are easy to decode and need no change to emit.c.inc.  Port them to
the new decoder.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
37861fa519 target/i386: move BSWAP to new decoder
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
2b8046f361 target/i386: move remaining conditional operations to new decoder
Move long-displacement Jcc, SETcc and CMOVcc to the new decoder.
While filling in the tables makes the code seem longer, the new
emitters are all just one line of code.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
40c4b92f1c target/i386: merge and enlarge a few ranges for call to disas_insn_new
Since new opcodes are not going to be added in translate.c, round the
case labels that call to disas_insn_new(), including whole sets of
eight opcodes when possible.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
d7c41a60d0 target/i386: move C0-FF opcodes to new decoder (except for x87)
The shift instructions are rewritten instead of reusing code from the old
decoder.  Rotates use CC_OP_ADCOX more extensively and generally rely
more on the optimizer, so that the code generators are shared between
the immediate-count and variable-count cases.

In particular, this makes gen_RCL and gen_RCR pretty efficient for the
count == 1 case, which becomes (apart from a few extra movs) something like:

  (compute_cc_all if needed)
  // save old value for OF calculation
  mov     cc_src2, T0
  // the bulk of RCL is just this!
  deposit T0, cc_src, T0, 1, TARGET_LONG_BITS - 1
  // compute carry
  shr     cc_dst, cc_src2, length - 1
  and     cc_dst, cc_dst, 1
  // compute overflow
  xor     cc_src2, cc_src2, T0
  extract cc_src2, cc_src2, length - 1, 1

32-bit MUL and IMUL are also slightly more efficient on 64-bit hosts.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
b603136402 target/i386: generalize gen_movl_seg_T0
In the new decoder it is sometimes easier to put the segment
in T1 instead of T0, usually because another operand was loaded
by common code in T0.  Genrealize gen_movl_seg_T0 to allow
using any source.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:26 +02:00
Paolo Bonzini
5e9e21bcc4 target/i386: move 60-BF opcodes to new decoder
Compared to the old decoder, the main differences in translation
are for the little-used ARPL instruction.  IMUL is adjusted a bit
to share more code to produce flags, but is otherwise very similar.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:53:14 +02:00
Paolo Bonzini
2666fbd271 target/i386: allow instructions with more than one immediate
While keeping decode->immediate for convenience and for 4-operand instructions,
store the immediate in X86DecodedOp as well.  This enables instructions
with more than one immediate such as ENTER.  It can also be used for far
calls and jumps.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:19 +02:00
Paolo Bonzini
442e38c4fb target/i386: extract gen_far_call/jmp, reordering temporaries
Extract the code into new functions, and swap T0/T1 so that T0 corresponds
to the first immediate in the instruction stream.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:19 +02:00
Paolo Bonzini
cc1d28bdbe target/i386: move 00-5F opcodes to new decoder
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:19 +02:00
Paolo Bonzini
445457693c target/i386: reintroduce debugging mechanism
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:12 +02:00
Paolo Bonzini
8b5de7ea56 target/i386: cleanup *gen_eob*
Create a new wrapper for syscall/sysret, and do not go through multiple
layers of wrappers.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:09 +02:00
Paolo Bonzini
ccfabc00e0 target/i386: clarify the "reg" argument of functions returning CCPrepare
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:52:02 +02:00
Paolo Bonzini
89e4e65ac0 target/i386: do not use s->T0 and s->T1 as scratch registers for CCPrepare
Instead of using s->T0 or s->T1, create a scratch register
when computing the C, NC, L or LE conditions.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:59 +02:00
Paolo Bonzini
bccb0c138e target/i386: extend cc_* when using them to compute flags
Instead of using s->tmp0 or s->tmp4 as the result, just extend the cc_*
registers in place.  It is harmless and, if multiple setcc instructions
are used, the optimizer will be able to remove the redundant ones.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:53 +02:00
Paolo Bonzini
dd17322be7 target/i386: pull cc_op update to callers of gen_jmp_rel{,_csize}
gen_update_cc_op must be called before control flow splits.  Doing it
in gen_jmp_rel{,_csize} may hide bugs, instead assert that cc_op is
clean---even if that means a few more calls to gen_update_cc_op().

With this new invariant, setting cc_op to CC_OP_DYNAMIC is unnecessary
since the caller should have done it.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:43 +02:00
Paolo Bonzini
bbba9594e8 target/i386: cleanup cc_op changes for REP/REPZ/REPNZ
gen_update_cc_op must be called before control flow splits.  Do it
where the jump on ECX!=0 is translated.

On the other hand, remove the call before gen_jcc1, which takes care of
it already, and explain why REPZ/REPNZ need not use CC_OP_DYNAMIC---the
translation block ends before any control-flow-dependent cc_op could
be observed.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:31 +02:00
Paolo Bonzini
64ddadc6bb target/i386: cc_op is not dynamic in gen_jcc1
Resetting cc_op to CC_OP_DYNAMIC should be done at control flow junctions,
which is not the case here.  This translation block is ending and the
only effect of calling set_cc_op() would be a discard of s->cc_srcT.
This discard is useless (it's a temporary, not a global) and in fact
prevents gen_prepare_cc from returning s->cc_srcT.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:51:17 +02:00
Paolo Bonzini
e995f3f944 target/i386: remove mask from CCPrepare
With the introduction of TSTEQ and TSTNE the .mask field is always -1,
so remove all the now-unnecessary code.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:50:39 +02:00
Paolo Bonzini
9309b53e83 target/i386: use TSTEQ/TSTNE to check flags
The new conditions obviously come in handy when testing individual bits
of EFLAGS, and they make it possible to remove the .mask field of
CCPrepare.

Lowering to shift+and is done by the optimizer if necessary.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:50:39 +02:00
Paolo Bonzini
15957eb9ef target/i386: use TSTEQ/TSTNE to test low bits
When testing the sign bit or equality to zero of a partial register, it
is useful to use a single TSTEQ or TSTNE operation.  It can also be used
to test the parity flag, using bit 0 of the population count.

Do not do this for target_ulong-sized values however; the optimizer would
produce a comparison against zero anyway, and it avoids shifts by 64
which are undefined behavior.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:50:39 +02:00
Babu Moger
b776569a53 target/i386: Fix CPUID encoding of Fn8000001E_ECX
Observed the following failure while booting the SEV-SNP guest and the
guest fails to boot with the smp parameters:
"-smp 192,sockets=1,dies=12,cores=8,threads=2".

qemu-system-x86_64: sev_snp_launch_update: SNP_LAUNCH_UPDATE ret=-5 fw_error=22 'Invalid parameter'
qemu-system-x86_64: SEV-SNP: CPUID validation failed for function 0x8000001e, index: 0x0.
provided: eax:0x00000000, ebx: 0x00000100, ecx: 0x00000b00, edx: 0x00000000
expected: eax:0x00000000, ebx: 0x00000100, ecx: 0x00000300, edx: 0x00000000
qemu-system-x86_64: SEV-SNP: failed update CPUID page

Reason for the failure is due to overflowing of bits used for "Node per
processor" in CPUID Fn8000001E_ECX. This field's width is 3 bits wide and
can hold maximum value 0x7. With dies=12 (0xB), it overflows and spills
over into the reserved bits. In the case of SEV-SNP, this causes CPUID
enforcement failure and guest fails to boot.

The PPR documentation for CPUID_Fn8000001E_ECX [Node Identifiers]
=================================================================
Bits    Description
31:11   Reserved.

10:8    NodesPerProcessor: Node per processor. Read-only.
        ValidValues:
        Value   Description
        0h      1 node per processor.
        7h-1h   Reserved.

7:0     NodeId: Node ID. Read-only. Reset: Fixed,XXh.
=================================================================

As in the spec, the valid value for "node per processor" is 0 and rest
are reserved.

Looking back at the history of decoding of CPUID_Fn8000001E_ECX, noticed
that there were cases where "node per processor" can be more than 1. It
is valid only for pre-F17h (pre-EPYC) architectures. For EPYC or later
CPUs, the linux kernel does not use this information to build the L3
topology.

Also noted that the CPUID Function 0x8000001E_ECX is available only when
TOPOEXT feature is enabled. This feature is enabled only for EPYC(F17h)
or later processors. So, previous generation of processors do not not
enumerate 0x8000001E_ECX leaf.

There could be some corner cases where the older guests could enable the
TOPOEXT feature by running with -cpu host, in which case legacy guests
might notice the topology change. To address those cases introduced a
new CPU property "legacy-multi-node". It will be true for older machine
types to maintain compatibility. By default, it will be false, so new
decoding will be used going forward.

The documentation is taken from Preliminary Processor Programming
Reference (PPR) for AMD Family 19h Model 11h, Revision B1 Processors 55901
Rev 0.25 - Oct 6, 2022.

Cc: qemu-stable@nongnu.org
Fixes: 31ada106d8 ("Simplify CPUID_8000_001E for AMD")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-ID: <0ee4b0a8293188a53970a2b0e4f4ef713425055e.1714757834.git.babu.moger@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-05-07 08:50:38 +02:00
Richard Henderson
f578b66e8c gitlab: Streamline ubuntu-22.04-s390x
We have one job to build user binaries and one job for system.
Disable tools and docs in the user job, and disable building
the user binaries in the system job.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 23:40:36 -07:00
Richard Henderson
22e8db9deb gitlab: Drop --static from s390x linux-user build
The host does not have the correct libraries installed for static pie,
which causes host/guest address space interference for some tests.
There's no real gain from linking statically, so drop it.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 23:40:31 -07:00
Richard Henderson
a55a1f77b6 gitlab: Drop --disable-libssh from ubuntu-22.04-s390x.yml
This was a workaround for ubuntu 20.04.

Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 23:35:17 -07:00
Richard Henderson
ca51921158 target/sh4: Update DisasContextBase.insn_start
Match the extra inserts of INDEX_op_insn_start, fixing
the db->num_insns != 1 assert in translator_loop.

Fixes: dcd092a063 ("accel/tcg: Improve can_do_io management")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 12:56:06 -07:00
Richard Henderson
d828b92b8a accel/tcg: Introduce CF_BP_PAGE
Record the fact that we've found a breakpoint on the page
in which a TranslationBlock is running.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 12:55:51 -07:00
Richard Henderson
8d65cda728 tcg/optimize: Optimize setcond with zmask
If we can show that high bits of an input are zero,
then we may optimize away some comparisons.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 12:55:51 -07:00
Richard Henderson
19517b8397 tcg/i386: Optimize setcond of TST{EQ,NE} with 0xffffffff
This may be treated as a 32-bit EQ/NE comparison against 0,
which is in turn treated as a LTU/GEU comparison against 1.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 12:55:50 -07:00
Richard Henderson
2623ca6ac1 tcg/i386: Simplify immediate 8-bit logical vector shifts
The x86 isa does not have this operation, so we need an expansion.
Use the same algorithm that we use for expanding this vector
operation with integers: perform the shift with a wider type
and then mask the bits that must be zero.

This reduces the instruction count from 5 to 2.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 12:55:50 -07:00
Richard Henderson
b3ee719e64 tcg: Add write_aofs to GVecGen3i
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 12:55:50 -07:00
Richard Henderson
e116b92d01 qemu-sparc queue
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Merge tag 'qemu-sparc-20240506' of https://github.com/mcayland/qemu into staging

qemu-sparc queue

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# gpg: Signature made Mon 06 May 2024 04:40:07 AM PDT
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* tag 'qemu-sparc-20240506' of https://github.com/mcayland/qemu:
  target/sparc: Split out do_ms16b
  target/sparc: Fix FPMERGE
  target/sparc: Fix FMULD8*X16
  target/sparc: Fix FMUL8x16A{U,L}
  target/sparc: Fix FMUL8x16
  target/sparc: Fix FEXPAND
  linux-user/sparc: Add more hwcap bits for sparc64
  hw/sparc64: set iommu_platform=on for virtio devices attached to the sun4u machine
  docs/about: Deprecate the old "UltraSparc" CPU names that contain a "+"
  docs/system/target-sparc: Improve the Sparc documentation
  target/sparc/cpu: Avoid spaces by default in the CPU names
  target/sparc/cpu: Rename the CPU models with a "+" in their names

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-05-06 10:19:56 -07:00