[PATCH AUTOSEL 6.6 1/2] x86/hyperv: Set X86_FEATURE_TSC_KNOWN_FREQ when Hyper-V provides frequency

[PATCH AUTOSEL 6.6 1/2] x86/hyperv: Set X86_FEATURE_TSC_KNOWN_FREQ when Hyper-V provides frequency

[Sasha Levin]

From: Michael Kelley <mhklinux@outlook.com>

[ Upstream commit 8fcc514809de41153b43ccbe1a0cdf7f72b78e7e ]

A Linux guest on Hyper-V gets the TSC frequency from a synthetic MSR, if
available. In this case, set X86_FEATURE_TSC_KNOWN_FREQ so that Linux
doesn't unnecessarily do refined TSC calibration when setting up the TSC
clocksource.

With this change, a message such as this is no longer output during boot
when the TSC is used as the clocksource:

[    1.115141] tsc: Refined TSC clocksource calibration: 2918.408 MHz

Furthermore, the guest and host will have exactly the same view of the
TSC frequency, which is important for features such as the TSC deadline
timer that are emulated by the Hyper-V host.

Signed-off-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Roman Kisel <romank@linux.microsoft.com>
Link: https://lore.kernel.org/r/20240606025559.1631-1-mhklinux@outlook.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20240606025559.1631-1-mhklinux@outlook.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/kernel/cpu/mshyperv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index e6bba12c759c..9a7cd3ce59ed 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -423,6 +423,7 @@ static void __init ms_hyperv_init_platform(void)
 	    ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
 		x86_platform.calibrate_tsc = hv_get_tsc_khz;
 		x86_platform.calibrate_cpu = hv_get_tsc_khz;
+		setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ);
 	}
 
 	if (ms_hyperv.priv_high & HV_ISOLATION) {
-- 
2.43.0

[PATCH AUTOSEL 6.6 2/2] tools: hv: rm .*.cmd when make clean

[Sasha Levin]

From: zhang jiao <zhangjiao2@cmss.chinamobile.com>

[ Upstream commit 5e5cc1eb65256e6017e3deec04f9806f2f317853 ]

rm .*.cmd when make clean

Signed-off-by: zhang jiao <zhangjiao2@cmss.chinamobile.com>
Reviewed-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Link: https://lore.kernel.org/r/20240902042103.5867-1-zhangjiao2@cmss.chinamobile.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20240902042103.5867-1-zhangjiao2@cmss.chinamobile.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/hv/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/hv/Makefile b/tools/hv/Makefile
index fe770e679ae8..5643058e2d37 100644
--- a/tools/hv/Makefile
+++ b/tools/hv/Makefile
@@ -47,7 +47,7 @@ $(OUTPUT)hv_fcopy_daemon: $(HV_FCOPY_DAEMON_IN)
 
 clean:
 	rm -f $(ALL_PROGRAMS)
-	find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete
+	find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete -o -name '\.*.cmd' -delete
 
 install: $(ALL_PROGRAMS)
 	install -d -m 755 $(DESTDIR)$(sbindir); \
-- 
2.43.0