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[Qemu-ppc] [PATCH] sysemu: support up to 1024 vCPUs

From: Greg Kurz
Subject: [Qemu-ppc] [PATCH] sysemu: support up to 1024 vCPUs
Date: Wed, 11 May 2016 16:00:04 +0200
User-agent: StGit/0.17.1-dirty

Some systems can already provide more than 255 hardware threads.

Bumping the QEMU limit to 1024 seems reasonable:
- it has no visible overhead in top
- the limit itself has no effect on hot paths

Signed-off-by: Greg Kurz <address@hidden>

This was tested with a pseries guest only. I'd like to know if it is okay
for other platforms.

 include/sysemu/sysemu.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 38fb3cad35e1..89d742caa477 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -185,7 +185,7 @@ extern int mem_prealloc;
  * Note that cpu->get_arch_id() may be larger than MAX_CPUMASK_BITS.
-#define MAX_CPUMASK_BITS 255
+#define MAX_CPUMASK_BITS 1024
 #define MAX_OPTION_ROMS 16
 typedef struct QEMUOptionRom {

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