[Xen-devel] [PATCH v5 7/9] x86/PVHv2: fix dom0_max_vcpus so it's capped to 128 for PVHv2 Dom0

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

PVHv2 Dom0 is limited to 128 vCPUs, as are all HVM guests at the moment. Fix
dom0_max_vcpus so it takes this limitation into account by poking at the
dom0_hvm variable.

Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
Change since v4:
 - Fix codding style to match rest of the function.

Changes since v3:
 - New in the series.
---
 xen/arch/x86/domain_build.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/arch/x86/domain_build.c b/xen/arch/x86/domain_build.c
index 4f5f712..55caa30 100644
--- a/xen/arch/x86/domain_build.c
+++ b/xen/arch/x86/domain_build.c
@@ -40,6 +40,7 @@
 
 #include <public/version.h>
 #include <public/arch-x86/hvm/start_info.h>
+#include <public/hvm/hvm_info_table.h>
 
 static long __initdata dom0_nrpages;
 static long __initdata dom0_min_nrpages;
@@ -176,6 +177,8 @@ unsigned int __init dom0_max_vcpus(void)
         max_vcpus = opt_dom0_max_vcpus_max;
     if ( max_vcpus > MAX_VIRT_CPUS )
         max_vcpus = MAX_VIRT_CPUS;
+    if ( dom0_pvh && max_vcpus > HVM_MAX_VCPUS )
+        max_vcpus = HVM_MAX_VCPUS;
 
     return max_vcpus;
 }
-- 
2.10.1 (Apple Git-78)


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