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[2/2] i386: Disable 'kvm-asyncpf-int' feature for machine types <= 5.1

Message ID 20210401151957.408028-3-vkuznets@redhat.com (mailing list archive)
State New, archived
Headers show
Series i386: Fix interrupt based Async PF enablement | expand

Commit Message

Vitaly Kuznetsov April 1, 2021, 3:19 p.m. UTC 
'kvm-asyncpf-int' was implemented in QEMU-5.2 so older machine types
should have it disabled to make migration to an older QEMU which does not
support this feature possible.

The issue went unnoticed probably because we also forgot to add
'kvm-asyncpf-int' to 'kvm_default_props[]' so it was rarely enabled.

Fixes: db5daafab2 ("target/i386: support KVM_FEATURE_ASYNC_PF_INT")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 hw/i386/pc.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 8a84b25a031e..04d5f76bf133 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -103,6 +103,7 @@  const size_t pc_compat_5_2_len = G_N_ELEMENTS(pc_compat_5_2);
 
 GlobalProperty pc_compat_5_1[] = {
     { "ICH9-LPC", "x-smi-cpu-hotplug", "off" },
+    { TYPE_X86_CPU, "kvm-asyncpf-int", "off" },
     { TYPE_X86_CPU, "kvm-msi-ext-dest-id", "off" },
 };
 const size_t pc_compat_5_1_len = G_N_ELEMENTS(pc_compat_5_1);