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KVM: SVM: Always print "AVIC enabled" separately, even when force enabled

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Print the customary "AVIC enabled" informational message even when AVIC is
force enabled on a system that doesn't advertise supported for AVIC in
CPUID, as not printing the standard message can confuse users and tools.

Opportunistically clean up the scary message when AVIC is force enabled,
but keep it as separate message so that it is printed at level "warn",
versus the standard message only being printed for level "info".

Suggested-by: Naveen N Rao (AMD) <naveen@kernel.org>
Reviewed-by: Naveen N Rao (AMD) <naveen@kernel.org>
Tested-by: Naveen N Rao (AMD) <naveen@kernel.org>
Link: https://lore.kernel.org/r/20250919215934.1590410-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2025-09-19 14:59:31 -07:00
parent a9095e4fc4
commit ce4253e21f
1 changed files with 9 additions and 10 deletions
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19
arch/x86/kvm/svm/avic.c
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@@ -1167,16 +1167,15 @@ bool __init avic_hardware_setup(void)
return false;
}
if (boot_cpu_has(X86_FEATURE_AVIC)) {
pr_info("AVIC enabled\n");
} else if (force_avic) {
/*
* Some older systems does not advertise AVIC support.
* See Revision Guide for specific AMD processor for more detail.
*/
pr_warn("AVIC is not supported in CPUID but force enabled");
pr_warn("Your system might crash and burn");
}
/*
* Print a scary message if AVIC is force enabled to make it abundantly
* clear that ignoring CPUID could have repercussions. See Revision
* Guide for specific AMD processor for more details.
*/
if (!boot_cpu_has(X86_FEATURE_AVIC))
pr_warn("AVIC unsupported in CPUID but force enabled, your system might crash and burn\n");
pr_info("AVIC enabled\n");
/* AVIC is a prerequisite for x2AVIC. */
x2avic_enabled = boot_cpu_has(X86_FEATURE_X2AVIC);