diff options
| author | Like Xu <likexu@tencent.com> | 2023-07-24 13:12:36 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-07-29 17:05:26 +0200 |
| commit | 5e1fe4a21c0c2a69419d97d62d3213e8f843920d (patch) | |
| tree | 8d30d333559ff84e4f66cbb754a285ec51a7024e | |
| parent | KVM: X86: Use GFP_KERNEL_ACCOUNT for pid_table in ipiv (diff) | |
| download | linux-5e1fe4a21c0c2a69419d97d62d3213e8f843920d.tar.xz linux-5e1fe4a21c0c2a69419d97d62d3213e8f843920d.zip | |
KVM: x86/irq: Conditionally register IRQ bypass consumer again
As was attempted commit 14717e203186 ("kvm: Conditionally register IRQ
bypass consumer"): "if we don't support a mechanism for bypassing IRQs,
don't register as a consumer. Initially this applied to AMD processors,
but when AVIC support was implemented for assigned devices,
kvm_arch_has_irq_bypass() was always returning true.
We can still skip registering the consumer where enable_apicv
or posted-interrupts capability is unsupported or globally disabled.
This eliminates meaningless dev_info()s when the connect fails
between producer and consumer", such as on Linux hosts where enable_apicv
or posted-interrupts capability is unsupported or globally disabled.
Cc: Alex Williamson <alex.williamson@redhat.com>
Reported-by: Yong He <alexyonghe@tencent.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217379
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20230724111236.76570-1-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/x86.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 00b87fcf6da4..43e0c51da65e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -13189,7 +13189,7 @@ EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); bool kvm_arch_has_irq_bypass(void) { - return true; + return enable_apicv && irq_remapping_cap(IRQ_POSTING_CAP); } int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, |