xemu/target
David Woodhouse 5e691a955a i386/kvm: Set Xen vCPU ID in KVM
There are (at least) three different vCPU ID number spaces. One is the
internal KVM vCPU index, based purely on which vCPU was chronologically
created in the kernel first. If userspace threads are all spawned and
create their KVM vCPUs in essentially random order, then the KVM indices
are basically random too.

The second number space is the APIC ID space, which is consistent and
useful for referencing vCPUs. MSIs will specify the target vCPU using
the APIC ID, for example, and the KVM Xen APIs also take an APIC ID
from userspace whenever a vCPU needs to be specified (as opposed to
just using the appropriate vCPU fd).

The third number space is not normally relevant to the kernel, and is
the ACPI/MADT/Xen CPU number which corresponds to cs->cpu_index. But
Xen timer hypercalls use it, and Xen timer hypercalls *really* want
to be accelerated in the kernel rather than handled in userspace, so
the kernel needs to be told.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
2023-03-01 08:22:49 +00:00
..
alpha target/alpha: Remove obsolete STATUS document 2023-02-27 22:29:01 +01:00
arm target/cpu: Restrict do_transaction_failed() handlers to sysemu 2023-02-27 22:29:01 +01:00
avr target/avr: Convert to 3-phase reset 2022-12-16 15:58:15 +00:00
cris target/cpu: Restrict cpu_get_phys_page_debug() handlers to sysemu 2023-02-27 22:29:01 +01:00
hexagon target/hexagon: Clean up includes 2023-02-08 07:28:05 +01:00
hppa target/hppa: Extract system helpers to sys_helper.c 2023-02-27 22:29:01 +01:00
i386 i386/kvm: Set Xen vCPU ID in KVM 2023-03-01 08:22:49 +00:00
loongarch target/loongarch/cpu: Restrict "memory.h" header to sysemu 2023-02-27 22:29:01 +01:00
m68k target/cpu: Restrict do_transaction_failed() handlers to sysemu 2023-02-27 22:29:01 +01:00
microblaze target/cpu: Restrict cpu_get_phys_page_debug() handlers to sysemu 2023-02-27 22:29:01 +01:00
mips Drop duplicate #include 2023-02-08 07:28:05 +01:00
nios2 target/cpu: Restrict cpu_get_phys_page_debug() handlers to sysemu 2023-02-27 22:29:01 +01:00
openrisc target/cpu: Restrict cpu_get_phys_page_debug() handlers to sysemu 2023-02-27 22:29:01 +01:00
ppc target/ppc: Fix warning with clang-15 2023-02-27 22:29:01 +01:00
riscv target/riscv/cpu: Move Floating-Point fields closer 2023-02-27 22:29:01 +01:00
rx target/cpu: Restrict cpu_get_phys_page_debug() handlers to sysemu 2023-02-27 22:29:01 +01:00
s390x target/s390x: Use tcg_constant_* in translate_vx.c.inc 2023-02-27 09:15:39 +01:00
sh4 target/cpu: Restrict cpu_get_phys_page_debug() handlers to sysemu 2023-02-27 22:29:01 +01:00
sparc target/sparc/sysemu: Remove pointless CONFIG_USER_ONLY guard 2023-02-27 22:29:01 +01:00
tricore target/tricore: Remove unused fields from CPUTriCoreState 2023-02-27 22:29:01 +01:00
xtensa target/xtensa/cpu: Include missing "memory.h" header 2023-02-27 22:29:01 +01:00
Kconfig hw/loongarch: Add support loongson3 virt machine type. 2022-06-06 18:09:03 +00:00
meson.build target/loongarch: Add target build suport 2022-06-06 18:09:03 +00:00