[Xen-changelog] [xen staging] x86: refine APIC ID restriction

[patchbot@xxxxxxx]

commit 261ef8ccbd28526d69c3a6c5944709f81624741a
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Mar 10 15:27:56 2020 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Mar 10 15:27:56 2020 +0100

    x86: refine APIC ID restriction
    
    Now that we distinguish "restricted" and "full" interrupt remapping
    mode, the 8-bit-APIC-ID restriction also needs to be enforced for
    "restricted".
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
 xen/arch/x86/smpboot.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index 6c548b0b53..0e54bd14f3 100644
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -1328,7 +1328,7 @@ int __cpu_up(unsigned int cpu)
         return -ENODEV;
 
     if ( (!x2apic_enabled && apicid >= APIC_ALL_CPUS) ||
-         (!iommu_intremap && (apicid >> 8)) )
+         (iommu_intremap != iommu_intremap_full && (apicid >> 8)) )
     {
         printk("Unsupported: APIC ID %#x in xAPIC mode w/o interrupt 
remapping\n",
                apicid);
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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