mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Sean Christopherson <seanjc@google.com>
To: Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	 Vitaly Kuznetsov <vkuznets@redhat.com>,
	David Woodhouse <dwmw2@infradead.org>,
	Paul Durrant <paul@xen.org>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/9] KVM: x86: Drop ASSERT()s on APIC/vCPU being non-NULL
Date: Fri,  5 Dec 2025 16:43:03 -0800	[thread overview]
Message-ID: <20251206004311.479939-2-seanjc@google.com> (raw)
In-Reply-To: <20251206004311.479939-1-seanjc@google.com>

Remove ASSERT()s on vCPU and APIC structures being non-NULL in the local
APIC code as the DEBUG=1 path of ASSERT() ends with BUG(), i.e. isn't
meaningfully better for debugging than a NULL pointer dereference.

For all intents and purposes, no functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/lapic.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 1597dd0b0cc6..558adcb67171 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1048,7 +1048,6 @@ bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 	struct kvm_lapic *target = vcpu->arch.apic;
 	u32 mda = kvm_apic_mda(vcpu, dest, source, target);
 
-	ASSERT(target);
 	switch (shorthand) {
 	case APIC_DEST_NOSHORT:
 		if (dest_mode == APIC_DEST_PHYSICAL)
@@ -1607,8 +1606,6 @@ static u32 apic_get_tmcct(struct kvm_lapic *apic)
 	ktime_t remaining, now;
 	s64 ns;
 
-	ASSERT(apic != NULL);
-
 	/* if initial count is 0, current count should also be 0 */
 	if (kvm_lapic_get_reg(apic, APIC_TMICT) == 0 ||
 		apic->lapic_timer.period == 0)
@@ -3000,8 +2997,6 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
 {
 	struct kvm_lapic *apic;
 
-	ASSERT(vcpu != NULL);
-
 	if (!irqchip_in_kernel(vcpu->kvm)) {
 		static_branch_inc(&kvm_has_noapic_vcpu);
 		return 0;
-- 
2.52.0.223.gf5cc29aaa4-goog


  reply	other threads:[~2025-12-06  0:43 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-12-06  0:43 [PATCH 0/9] KVM: x86: APIC and I/O APIC cleanups Sean Christopherson
2025-12-06  0:43 ` Sean Christopherson [this message]
2025-12-06  0:43 ` [PATCH 2/9] KVM: x86: Drop guest/user-triggerable asserts on IRR/ISR vectors Sean Christopherson
2025-12-06  0:43 ` [PATCH 3/9] KVM: x86: Drop ASSERT() on I/O APIC EOIs being only for LEVEL_to WARN_ON_ONCE Sean Christopherson
2025-12-06  0:43 ` [PATCH 4/9] KVM: x86: Drop guest-triggerable ASSERT()s on I/O APIC access alignment Sean Christopherson
2025-12-06  0:43 ` [PATCH 5/9] KVM: x86: Drop MAX_NR_RESERVED_IOAPIC_PINS, use KVM_MAX_IRQ_ROUTES directly Sean Christopherson
2025-12-06  0:43 ` [PATCH 6/9] KVM: x86: Add a wrapper to handle common case of IRQ delivery without dest_map Sean Christopherson
2025-12-06  0:43 ` [PATCH 7/9] KVM: x86: Fold "struct dest_map" into "struct rtc_status" Sean Christopherson
2025-12-06  0:43 ` [PATCH 8/9] KVM: x86: Bury ioapic.h definitions behind CONFIG_KVM_IOAPIC Sean Christopherson
2025-12-06  0:43 ` [PATCH 9/9] KVM: x86: Hide KVM_IRQCHIP_KERNEL behind CONFIG_KVM_IOAPIC=y Sean Christopherson
2026-01-12 17:38 ` [PATCH 0/9] KVM: x86: APIC and I/O APIC cleanups Sean Christopherson

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20251206004311.479939-2-seanjc@google.com \
    --to=seanjc@google.com \
    --cc=dwmw2@infradead.org \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=paul@xen.org \
    --cc=pbonzini@redhat.com \
    --cc=vkuznets@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox

all inboxes | Powered by JetHome®