linux-kernel - [tip: x86/apic] x86/xen/pv: Pretend that it found SMP configuration

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Message-ID: <169160834367.27769.6523645283813577814.tip-bot2@tip-bot2>
Date:   Wed, 09 Aug 2023 19:12:23 -0000
From:   "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Sohil Mehta <sohil.mehta@...el.com>,
        Juergen Gross <jgross@...e.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/apic] x86/xen/pv: Pretend that it found SMP configuration

The following commit has been merged into the x86/apic branch of tip:

Commit-ID:     24889a3a5314f71e7bca586b607882d87c71799c
Gitweb:        https://git.kernel.org/tip/24889a3a5314f71e7bca586b607882d87c71799c
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Tue, 08 Aug 2023 15:03:49 -07:00
Committer:     Dave Hansen <dave.hansen@...ux.intel.com>
CommitterDate: Wed, 09 Aug 2023 11:58:21 -07:00

x86/xen/pv: Pretend that it found SMP configuration

Unlike all other SMP configuration "parsers" XEN/PV does not set
smp_found_config which is inconsistent and prevents doing proper decision
logic based on this flag.

Make XEN/PV pretend that it found SMP configuration.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Tested-by: Michael Kelley <mikelley@...rosoft.com>
Tested-by: Sohil Mehta <sohil.mehta@...el.com>
Tested-by: Juergen Gross <jgross@...e.com> # Xen PV (dom0 and unpriv. guest)
---
 arch/x86/xen/smp_pv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c
index c6b42c6..a0f07bb 100644
--- a/arch/x86/xen/smp_pv.c
+++ b/arch/x86/xen/smp_pv.c
@@ -182,7 +182,8 @@ static void __init _get_smp_config(unsigned int early)
 	if (subtract)
 		set_nr_cpu_ids(nr_cpu_ids - subtract);
 #endif
-
+	/* Pretend to be a proper enumerated system */
+	smp_found_config = 1;
 }
 
 static void __init xen_pv_smp_prepare_boot_cpu(void)