git: 37f780d3e0a2 - main - Disable x2APIC for SandyBridge laptops with Samsung BIOS

[Konstantin Belousov]

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=37f780d3e0a2e8e4c64c526b6e7dc77ff6b91057

commit 37f780d3e0a2e8e4c64c526b6e7dc77ff6b91057
Author:     Konstantin Belousov <kib at FreeBSD.org>
AuthorDate: 2021-06-02 22:29:07 +0000
Commit:     Konstantin Belousov <kib at FreeBSD.org>
CommitDate: 2021-06-03 19:47:31 +0000

    Disable x2APIC for SandyBridge laptops with Samsung BIOS
    
    From the PR:
    Almost always, my Samsung RF511 laptop could not boot with
    x2APIC enabled in the kernel. It froze during SMP initialization,
    shortly after "ACPI APIC Table: <SECCSD LH43STAR>" was printed
    to the console. When the kernel is instructed not to use x2APIC,
    the system boots correctly.
    
    PR:     256389
    Submitted by:   David Sebek <dasebek at gmail.com>
    Reviewed by:    markj
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D30624
---
 sys/x86/acpica/madt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/x86/acpica/madt.c b/sys/x86/acpica/madt.c
index e041296d4ca5..8e343a6619f3 100644
--- a/sys/x86/acpica/madt.c
+++ b/sys/x86/acpica/madt.c
@@ -131,6 +131,7 @@ madt_probe_cpus(void)
 static const char *x2apic_sandy_dis[] = {
 	"LENOVO",
 	"ASUSTeK Computer Inc.",
+	"SAMSUNG ELECTRONICS CO., LTD.",
 };
 
 /*