2018-01-19 10:08:51

by Jan Kiszka

[permalink] [raw]
Subject: [PATCH] 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 <[email protected]>
---
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 7ade152133c7..2b7ebbe9043d 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;



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 <[email protected]>
AuthorDate: Fri, 19 Jan 2018 11:06:17 +0100
Committer: Thomas Gleixner <[email protected]>
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 <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Jailhouse <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

---
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;