diff options
| author | Jane Malalane <jane.malalane@citrix.com> | 2022-07-29 08:04:16 +0100 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2022-08-12 11:28:21 +0200 |
| commit | b1c3497e604ddccea5af4071831ed0e4680fb35e (patch) | |
| tree | 108b8bd765f1e0496592013bb988ac329ca19de9 /arch/x86/include/asm/xen/cpuid.h | |
| parent | 251e90e7e346a23742b90e2c4db19d322e071d99 (diff) | |
x86/xen: Add support for HVMOP_set_evtchn_upcall_vector
Implement support for the HVMOP_set_evtchn_upcall_vector hypercall in
order to set the per-vCPU event channel vector callback on Linux and
use it in preference of HVM_PARAM_CALLBACK_IRQ.
If the per-VCPU vector setup is successful on BSP, use this method
for the APs. If not, fallback to the global vector-type callback.
Also register callback_irq at per-vCPU event channel setup to trick
toolstack to think the domain is enlightened.
Suggested-by: "Roger Pau Monné" <roger.pau@citrix.com>
Signed-off-by: Jane Malalane <jane.malalane@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20220729070416.23306-1-jane.malalane@citrix.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'arch/x86/include/asm/xen/cpuid.h')
| -rw-r--r-- | arch/x86/include/asm/xen/cpuid.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/xen/cpuid.h b/arch/x86/include/asm/xen/cpuid.h index 78e667a31d6c..6daa9b0c8d11 100644 --- a/arch/x86/include/asm/xen/cpuid.h +++ b/arch/x86/include/asm/xen/cpuid.h @@ -107,6 +107,8 @@ * ID field from 8 to 15 bits, allowing to target APIC IDs up 32768. */ #define XEN_HVM_CPUID_EXT_DEST_ID (1u << 5) +/* Per-vCPU event channel upcalls */ +#define XEN_HVM_CPUID_UPCALL_VECTOR (1u << 6) /* * Leaf 6 (0x40000x05) |