qemu/include
Emilio G. Cota 7264961934 hw: add .min_cpus and .default_cpus fields to machine_class
max_cpus needs to be an upper bound on the number of vCPUs
initialized; otherwise TCG region initialization breaks.

Some boards initialize a hard-coded number of vCPUs, which is not
captured by the global max_cpus and therefore breaks TCG initialization.
Fix it by adding the .min_cpus field to machine_class.

This commit also changes some user-facing behaviour: we now die if
-smp is below this hard-coded vCPU minimum instead of silently
ignoring the passed -smp value (sometimes announcing this by printing
a warning). However, the introduction of .default_cpus lessens the
likelihood that users will notice this: if -smp isn't set, we now
assign the value in .default_cpus to both smp_cpus and max_cpus. IOW,
if a user does not set -smp, they always get a correct number of vCPUs.

This change fixes 3468b59 ("tcg: enable multiple TCG contexts in
softmmu", 2017-10-24), which broke TCG initialization for some
ARM boards.

Fixes: 3468b59e18
Reported-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-id: 1510343626-25861-6-git-send-email-cota@braap.org
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-11-13 13:55:27 +00:00
..
block nbd: Fix struct name for structured reads 2017-11-09 10:17:12 -06:00
chardev chardev: remove context in chr_update_read_handler 2017-09-22 21:07:27 +02:00
crypto block: convert qcrypto_block_encrypt|decrypt to take bytes offset 2017-10-06 16:30:47 +02:00
disas disas: Dump insn bytes along with capstone disassembly 2017-11-09 08:46:38 +01:00
exec Capstone disassembler 2017-10-27 08:04:51 +01:00
fpu configure: Drop ancient Solaris 9 and earlier support 2017-07-21 15:04:05 +01:00
hw hw: add .min_cpus and .default_cpus fields to machine_class 2017-11-13 13:55:27 +00:00
io io: get rid of bounce buffering in websock write path 2017-10-16 16:57:08 +01:00
libdecnumber Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
migration migration: check pre_save return in vmstate_save_state 2017-09-27 11:36:31 +01:00
monitor block: rip out all traces of password prompting 2017-07-11 17:44:56 +02:00
net net/net.c: Add vnet_hdr support in SocketReadState 2017-07-17 20:02:11 +08:00
qapi qapi: Change data type of the FOO_lookup generated for enum FOO 2017-09-04 13:09:13 +02:00
qemu osdep: introduce qemu_mprotect_rwx/none 2017-10-24 13:53:42 -07:00
qom qom: move CPUClass.tcg_initialize to a global 2017-11-13 13:55:25 +00:00
scsi scsi: add multipath support to qemu-pr-helper 2017-09-22 21:07:27 +02:00
standard-headers linux-headers: sync against v4.14-rc1 2017-09-29 10:58:31 +02:00
sysemu tpm: add missing include 2017-10-24 13:37:13 -04:00
ui ui: opengl updates for dma-buf support. 2017-10-19 12:09:53 +01:00
elf.h tcg/s390: Use constant pool for movi 2017-09-07 11:57:35 -07:00
glib-compat.h glib-compat: move G_SOURCE_CONTINUE/REMOVE there 2017-10-10 16:33:55 +02:00
qemu-common.h maint: Include bug-reporting info in --help output 2017-08-08 17:28:53 +02:00
qemu-io.h hmp: Request permissions in qemu-io 2017-02-28 20:47:50 +01:00
trace-tcg.h trace: get rid of generated-events.h/generated-events.c 2016-10-12 09:54:52 +02:00