linux-kernel - [tip: x86/vmware] x86/vmware: Remove vmware_sched_clock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Tue, 24 Mar 2020 14:23:56 -0000
From:   "tip-bot2 for Alexey Makhalov" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Alexey Makhalov <amakhalov@...are.com>,
        Borislav Petkov <bp@...e.de>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Thomas Gleixner <tglx@...utronix.de>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/vmware] x86/vmware: Remove vmware_sched_clock_setup()

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

Commit-ID:     dd735f4707e603ac5b541b5f30de87c3c7bd60dd
Gitweb:        https://git.kernel.org/tip/dd735f4707e603ac5b541b5f30de87c3c7bd60dd
Author:        Alexey Makhalov <amakhalov@...are.com>
AuthorDate:    Mon, 23 Mar 2020 19:57:04 
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Tue, 24 Mar 2020 09:31:06 +01:00

x86/vmware: Remove vmware_sched_clock_setup()

Move cyc2ns setup logic to separate function.
This separation will allow to use cyc2ns mult/shift pair
not only for the sched_clock but also for other clocks
such as steal_clock.

Signed-off-by: Alexey Makhalov <amakhalov@...are.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Thomas Hellstrom <thellstrom@...are.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lkml.kernel.org/r/20200323195707.31242-3-amakhalov@vmware.com
---
 arch/x86/kernel/cpu/vmware.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
index d280560..efb22fa 100644
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -122,7 +122,7 @@ static unsigned long long notrace vmware_sched_clock(void)
 	return ns;
 }
 
-static void __init vmware_sched_clock_setup(void)
+static void __init vmware_cyc2ns_setup(void)
 {
 	struct cyc2ns_data *d = &vmware_cyc2ns;
 	unsigned long long tsc_now = rdtsc();
@@ -132,8 +132,7 @@ static void __init vmware_sched_clock_setup(void)
 	d->cyc2ns_offset = mul_u64_u32_shr(tsc_now, d->cyc2ns_mul,
 					   d->cyc2ns_shift);
 
-	pv_ops.time.sched_clock = vmware_sched_clock;
-	pr_info("using sched offset of %llu ns\n", d->cyc2ns_offset);
+	pr_info("using clock offset of %llu ns\n", d->cyc2ns_offset);
 }
 
 static void __init vmware_paravirt_ops_setup(void)
@@ -141,8 +140,14 @@ static void __init vmware_paravirt_ops_setup(void)
 	pv_info.name = "VMware hypervisor";
 	pv_ops.cpu.io_delay = paravirt_nop;
 
-	if (vmware_tsc_khz && vmw_sched_clock)
-		vmware_sched_clock_setup();
+	if (vmware_tsc_khz == 0)
+		return;
+
+	vmware_cyc2ns_setup();
+
+	if (vmw_sched_clock)
+		pv_ops.time.sched_clock = vmware_sched_clock;
+
 }
 #else
 #define vmware_paravirt_ops_setup() do {} while (0)