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authorDavid Woodhouse <dwmw@amazon.co.uk>2020-10-19 15:55:56 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2020-10-28 13:52:05 -0400
commit5a169bf04cd2bfdbac967d12eb5b70915b29d7ee (patch)
tree0b8757ba4296efe2ec1219a8ae429f0ea0373c5c /arch
parent3650b228f83adda7e5ee532e2b90429c03f7b9ec (diff)
x86/kvm: Reserve KVM_FEATURE_MSI_EXT_DEST_ID
No functional change; just reserve the feature bit for now so that VMMs can start to implement it. This will allow the host to indicate that MSI emulation supports 15-bit destination IDs, allowing up to 32768 CPUs without interrupt remapping. cf. https://patchwork.kernel.org/patch/11816693/ for qemu Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <4cd59bed05f4b7410d3d1ffd1e997ab53683874d.camel@infradead.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/uapi/asm/kvm_para.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/uapi/asm/kvm_para.h b/arch/x86/include/uapi/asm/kvm_para.h
index 812e9b4c1114..950afebfba88 100644
--- a/arch/x86/include/uapi/asm/kvm_para.h
+++ b/arch/x86/include/uapi/asm/kvm_para.h
@@ -32,6 +32,7 @@
#define KVM_FEATURE_POLL_CONTROL 12
#define KVM_FEATURE_PV_SCHED_YIELD 13
#define KVM_FEATURE_ASYNC_PF_INT 14
+#define KVM_FEATURE_MSI_EXT_DEST_ID 15
#define KVM_HINTS_REALTIME 0

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