From: Jim Mattson <jmattson@google.com>
To: kvm@vger.kernel.org, pbonzini@redhat.com
Cc: Jim Mattson <jmattson@google.com>
Subject: [kvm-unit-tests PATCH 3/3] x86: Define wrtsc(tsc) as wrmsr(MSR_IA32_TSC, tsc)
Date: Thu, 27 Jan 2022 13:55:48 -0800 [thread overview]
Message-ID: <20220127215548.2016946-3-jmattson@google.com> (raw)
In-Reply-To: <20220127215548.2016946-1-jmattson@google.com>
Remove some inline assembly code duplication and opportunistically
replace the magic constant, "0x10," with "MSR_IA32_TSC."
Signed-off-by: Jim Mattson <jmattson@google.com>
---
lib/x86/processor.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/lib/x86/processor.h b/lib/x86/processor.h
index fe5add548261..117032a4895c 100644
--- a/lib/x86/processor.h
+++ b/lib/x86/processor.h
@@ -592,9 +592,7 @@ static inline unsigned long long rdtscp(u32 *aux)
static inline void wrtsc(u64 tsc)
{
- unsigned a = tsc, d = tsc >> 32;
-
- asm volatile("wrmsr" : : "a"(a), "d"(d), "c"(0x10));
+ wrmsr(MSR_IA32_TSC, tsc);
}
static inline void irq_disable(void)
--
2.35.0.rc2.247.g8bbb082509-goog
next prev parent reply other threads:[~2022-01-27 21:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 21:55 [kvm-unit-tests PATCH 1/3] x86: tsc_adjust: Remove flaky timing test Jim Mattson
2022-01-27 21:55 ` [kvm-unit-tests PATCH 2/3] x86: tsc_adjust: Use report_skip when skipping test Jim Mattson
2022-01-27 21:55 ` Jim Mattson [this message]
2022-01-28 15:17 ` [kvm-unit-tests PATCH 3/3] x86: Define wrtsc(tsc) as wrmsr(MSR_IA32_TSC, tsc) Paolo Bonzini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220127215548.2016946-3-jmattson@google.com \
--to=jmattson@google.com \
--cc=kvm@vger.kernel.org \
--cc=pbonzini@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).