From: Xin Li <xin@zytor.com>
To: Nikolay Borisov <nik.borisov@suse.com>, linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
peterz@infradead.org, andrew.cooper3@citrix.com,
seanjc@google.com
Subject: Re: [PATCH v1 3/3] x86/entry: Set FRED RSP0 on return to userspace instead of context switch
Date: Fri, 9 Aug 2024 10:37:08 -0700 [thread overview]
Message-ID: <34964ea0-dbf5-41a1-82cb-5f677afad23c@zytor.com> (raw)
In-Reply-To: <eb2ed1b4-94cf-4d3d-b726-6ee0fa13ca9e@suse.com>
On 8/9/2024 3:45 AM, Nikolay Borisov wrote:
>> +#define TIF_LOAD_USER_STATES 30 /* Load user level states */
>
> Wouldn't something along the l ines of TIF_LOAD_FRED_RSP be more
> descriptive, or it's expected that this flag can cover more state in the
> future?
Sean mentioned TIF_LOAD_FRED_RSP, however we also have FRED SSP0, which
needs to be handled similarly.
And we also want to use it to cover future states.
next prev parent reply other threads:[~2024-08-09 17:38 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-07 5:47 [PATCH v1 0/3] x86: Write FRED RSP0 on return to userspace Xin Li (Intel)
2024-08-07 5:47 ` [PATCH v1 1/3] x86/entry: Test ti_work for zero before processing individual bits Xin Li (Intel)
2024-08-07 16:21 ` Brian Gerst
2024-08-07 23:03 ` Xin Li
2024-08-07 18:08 ` Thomas Gleixner
2024-08-07 18:21 ` Thomas Gleixner
2024-08-07 23:01 ` Xin Li
2024-08-07 5:47 ` [PATCH v1 2/3] x86/msr: Switch between WRMSRNS and WRMSR with the alternatives mechanism Xin Li (Intel)
2024-08-07 18:11 ` Thomas Gleixner
2024-08-09 23:07 ` Andrew Cooper
2024-08-10 0:01 ` H. Peter Anvin
2024-08-10 0:25 ` Andrew Cooper
2024-08-16 17:52 ` Xin Li
2024-08-16 18:40 ` Andrew Cooper
2024-08-16 19:18 ` H. Peter Anvin
2024-08-16 21:45 ` Andrew Cooper
2024-08-16 21:26 ` H. Peter Anvin
2024-08-16 22:27 ` Andrew Cooper
2024-08-16 22:34 ` Andrew Cooper
2024-08-16 23:03 ` H. Peter Anvin
2024-08-16 22:59 ` H. Peter Anvin
2024-08-17 23:51 ` H. Peter Anvin
2024-08-17 14:23 ` Borislav Petkov
2024-08-17 14:43 ` Borislav Petkov
2024-08-17 15:44 ` Xin Li
2024-08-17 19:22 ` H. Peter Anvin
2024-08-18 5:59 ` Borislav Petkov
2024-08-17 19:22 ` H. Peter Anvin
2024-08-18 5:49 ` Borislav Petkov
2024-08-18 6:16 ` H. Peter Anvin
2024-08-07 5:47 ` [PATCH v1 3/3] x86/entry: Set FRED RSP0 on return to userspace instead of context switch Xin Li (Intel)
2024-08-07 18:39 ` Thomas Gleixner
2024-08-07 21:55 ` Sean Christopherson
2024-08-07 23:04 ` Thomas Gleixner
2024-08-09 10:45 ` Nikolay Borisov
2024-08-09 17:37 ` Xin Li [this message]
2024-08-09 22:43 ` H. Peter Anvin
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