linux-kernel - [tip:x86/platform] x86/jailhouse: Set X86_FEATURE_TSC_KNOWN

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Date:   Fri, 19 Jan 2018 23:19:11 -0800
From:   tip-bot for Jan Kiszka <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, jan.kiszka@...mens.com, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, jailhouse-dev@...glegroups.com,
        hpa@...or.com
Subject: [tip:x86/platform] x86/jailhouse: Set X86_FEATURE_TSC_KNOWN_FREQ

Commit-ID:  11f19ec025dd421c54978c69e42d86758fa310de
Gitweb:     https://git.kernel.org/tip/11f19ec025dd421c54978c69e42d86758fa310de
Author:     Jan Kiszka <jan.kiszka@...mens.com>
AuthorDate: Fri, 19 Jan 2018 11:06:17 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Sat, 20 Jan 2018 08:15:43 +0100

x86/jailhouse: Set X86_FEATURE_TSC_KNOWN_FREQ

Otherwise, Linux will not recognize precalibrated_tsc_khz and disable
the tsc as clocksource.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Jailhouse <jailhouse-dev@...glegroups.com>
Link: https://lkml.kernel.org/r/975fbfc9-2a64-cc56-40d5-164992ec3916@siemens.com

---
 arch/x86/kernel/jailhouse.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/jailhouse.c b/arch/x86/kernel/jailhouse.c
index 7ade152..2b7ebbe 100644
--- a/arch/x86/kernel/jailhouse.c
+++ b/arch/x86/kernel/jailhouse.c
@@ -176,6 +176,7 @@ static void __init jailhouse_init_platform(void)
 	pr_debug("Jailhouse: PM-Timer IO Port: %#x\n", pmtmr_ioport);
 
 	precalibrated_tsc_khz = setup_data.tsc_khz;
+	setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ);
 
 	pci_probe = 0;