izzy/xemu
0
0
Fork 0
mirror of https://github.com/izzy2lost/xemu.git synced 2026-07-06 00:20:22 -07:00
Code Issues Packages Projects Releases Wiki Activity

docs: Document removal of 64-bit on 32-bit emulation

Browse Source 
With acce728cbc we disallowed configuring 64-bit guests on
32-bit hosts, but forgot to document that in removed-features.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Richard Henderson
2025-04-14 12:30:09 +03:00
committed by Michael Tokarev
parent b0b5af62ef
commit f3ca7ca222
1 changed files with 9 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/about/removed-features.rst
+9
View File
@@ -858,6 +858,15 @@ QEMU. Since all recent x86 hardware from the past >10 years is
capable of the 64-bit x86 extensions, a corresponding 64-bit OS should
be used instead.
32-bit hosts for 64-bit guests (removed in 10.0)
''''''''''''''''''''''''''''''''''''''''''''''''
In general, 32-bit hosts cannot support the memory space or atomicity
requirements of 64-bit guests. Prior to 10.0, QEMU attempted to
work around the atomicity issues in system mode by running all vCPUs
in a single thread context; in user mode atomicity was simply broken.
From 10.0, QEMU has disabled configuration of 64-bit guests on 32-bit hosts.
Guest Emulator ISAs
-------------------