From: Richard Henderson <richard.henderson@linaro.org>
To: Paolo Bonzini <pbonzini@redhat.com>, qemu-devel@nongnu.org
Subject: Re: [PATCH v2 10/10] target/i386: implement RDPID in TCG
Date: Tue, 20 Jun 2023 18:23:28 +0200 [thread overview]
Message-ID: <ee1239e3-7c2a-9f07-b15e-c9d9f3541bc3@linaro.org> (raw)
In-Reply-To: <20230620151634.21053-11-pbonzini@redhat.com>
On 6/20/23 17:16, Paolo Bonzini wrote:
> RDPID corresponds to a RDMSR(TSC_AUX); however, it is unprivileged
> so for user-mode emulation we must provide the value that the kernel
> places in the MSR. For Linux, it is a combination of the current CPU
> and the current NUMA node, both of which can be retrieved with getcpu(2).
> For BSD, just return 0.
>
> RDTSCP is reimplemented as RDTSC + RDPID ECX; the differences in terms
> of serializability are not relevant to QEMU.
>
> Signed-off-by: Paolo Bonzini<pbonzini@redhat.com>
> ---
> meson.build | 1 +
> target/i386/cpu.c | 10 +++++++++-
> target/i386/helper.h | 2 +-
> target/i386/tcg/misc_helper.c | 23 +++++++++++++++++------
> target/i386/tcg/translate.c | 15 +++++++++++++--
> 5 files changed, 41 insertions(+), 10 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
prev parent reply other threads:[~2023-06-20 16:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-20 15:16 [PATCH v2 00/10] target/i386: add a few simple features Paolo Bonzini
2023-06-20 15:16 ` [PATCH v2 01/10] target/i386: fix INVD vmexit Paolo Bonzini
2023-06-20 15:16 ` [PATCH v2 02/10] target/i386: TCG supports 3DNow! prefetch(w) Paolo Bonzini
2023-06-20 15:16 ` [PATCH v2 03/10] target/i386: TCG supports RDSEED Paolo Bonzini
2023-06-20 16:24 ` Richard Henderson
2023-06-21 5:46 ` Paolo Bonzini
2023-06-20 15:16 ` [PATCH v2 04/10] target/i386: TCG supports XSAVEERPTR Paolo Bonzini
2023-06-20 15:16 ` [PATCH v2 05/10] target/i386: TCG supports WBNOINVD Paolo Bonzini
2023-06-20 15:16 ` [PATCH v2 06/10] target/i386: Intel only supports SYSCALL in long mode Paolo Bonzini
2023-06-20 15:57 ` Richard Henderson
2023-06-20 15:16 ` [PATCH v2 07/10] target/i386: sysret and sysexit are privileged Paolo Bonzini
2023-06-20 15:58 ` Richard Henderson
2023-06-20 15:16 ` [PATCH v2 08/10] target/i386: implement 32-bit SYSCALL for linux-user Paolo Bonzini
2023-06-20 16:10 ` Richard Henderson
2023-06-20 15:16 ` [PATCH v2 09/10] target/i386: implement 32-bit SYSENTER " Paolo Bonzini
2023-06-20 16:22 ` Richard Henderson
2023-06-20 16:27 ` Paolo Bonzini
2023-06-20 15:16 ` [PATCH v2 10/10] target/i386: implement RDPID in TCG Paolo Bonzini
2023-06-20 16:23 ` Richard Henderson [this message]
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=ee1239e3-7c2a-9f07-b15e-c9d9f3541bc3@linaro.org \
--to=richard.henderson@linaro.org \
--cc=pbonzini@redhat.com \
--cc=qemu-devel@nongnu.org \
/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).