Re: [PATCH for 4.16 07/10] x86: Introduce sync_core_before_usermode (v2)

[PATCH for 4.16 00/10] membarrier updates for 4.16 · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
[PATCH for 4.16 01/10] membarrier: selftest: Test private expedited cmd (v2) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
[PATCH for 4.16 04/10] membarrier: provide SHARED_EXPEDITED command (v2) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
Re: [PATCH for 4.16 04/10] membarrier: provide SHARED_EXPEDITED command (v2) · Thomas Gleixner <hidden> · 2018-01-16
Re: [PATCH for 4.16 04/10] membarrier: provide SHARED_EXPEDITED command (v2) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-16
Re: [PATCH for 4.16 04/10] membarrier: provide SHARED_EXPEDITED command (v2) · Thomas Gleixner <hidden> · 2018-01-16
[PATCH for 4.16 03/10] membarrier: Document scheduler barrier requirements (v5) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
[PATCH for 4.16 02/10] powerpc: membarrier: Skip memory barrier in switch_mm() (v7) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
[PATCH for 4.16 05/10] membarrier: selftest: Test shared expedited cmd · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
[PATCH for 4.16 09/10] membarrier: arm64: Provide core serializing command · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
[PATCH for 4.16 10/10] membarrier: selftest: Test private expedited sync core cmd · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
[PATCH for 4.16 08/10] membarrier: x86: Provide core serializing command (v3) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
Re: [PATCH for 4.16 08/10] membarrier: x86: Provide core serializing command (v3) · Thomas Gleixner <hidden> · 2018-01-16
Re: [PATCH for 4.16 08/10] membarrier: x86: Provide core serializing command (v3) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-16
Re: [PATCH for 4.16 08/10] membarrier: x86: Provide core serializing command (v3) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-16
[PATCH for 4.16 07/10] x86: Introduce sync_core_before_usermode (v2) · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15
Re: [PATCH for 4.16 07/10] x86: Introduce sync_core_before_usermode (v2) · Thomas Gleixner <hidden> · 2018-01-16
[PATCH for 4.16 06/10] membarrier: Provide core serializing command · Mathieu Desnoyers <mathieu.desnoyers@efficios.com> · 2018-01-15

From: Thomas Gleixner <hidden>
Date: 2018-01-16 18:28:45
Also in: linux-arch, lkml

On Mon, 15 Jan 2018, Mathieu Desnoyers wrote:

Introduce an architecture function that ensures the current CPU
issues a core serializing instruction before returning to usermode.

This is needed for the membarrier "sync_core" command.

Architectures defining the sync_core_before_usermode() static inline
need to select ARCH_HAS_SYNC_CORE_BEFORE_USERMODE.

Reviewed-by: Thomas Gleixner <redacted>

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