linux-kernel - [PATCH 4.14 041/119] arm64: Documentation: cpu-feature-registers: Remove RES0 fields

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Date:   Sun, 27 Oct 2019 22:00:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        Dave Martin <dave.martin@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: [PATCH 4.14 041/119] arm64: Documentation: cpu-feature-registers: Remove RES0 fields

From: Suzuki K Poulose <suzuki.poulose@....com>

[ Upstream commit 847ecd3fa311cde0f10a1b66c572abb136742b1d ]

Remove the invisible RES0 field entries from the table, listing
fields in CPU ID feature registers, as :
 1) We are only interested in the user visible fields.
 2) The field description may not be up-to-date, as the
    field could be assigned a new meaning.
 3) We already explain the rules of the fields which are not
    visible.

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will.deacon@....com>
Acked-by: Mark Rutland <mark.rutland@....com>
Reviewed-by: Dave Martin <dave.martin@....com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
Signed-off-by: Will Deacon <will.deacon@....com>
[ardb: fix up for missing SVE in context]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 Documentation/arm64/cpu-feature-registers.txt |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

--- a/Documentation/arm64/cpu-feature-registers.txt
+++ b/Documentation/arm64/cpu-feature-registers.txt
@@ -110,7 +110,6 @@ infrastructure:
      x--------------------------------------------------x
      | Name                         |  bits   | visible |
      |--------------------------------------------------|
-     | RES0                         | [63-52] |    n    |
      |--------------------------------------------------|
      | FHM                          | [51-48] |    y    |
      |--------------------------------------------------|
@@ -124,8 +123,6 @@ infrastructure:
      |--------------------------------------------------|
      | RDM                          | [31-28] |    y    |
      |--------------------------------------------------|
-     | RES0                         | [27-24] |    n    |
-     |--------------------------------------------------|
      | ATOMICS                      | [23-20] |    y    |
      |--------------------------------------------------|
      | CRC32                        | [19-16] |    y    |
@@ -135,8 +132,6 @@ infrastructure:
      | SHA1                         | [11-8]  |    y    |
      |--------------------------------------------------|
      | AES                          | [7-4]   |    y    |
-     |--------------------------------------------------|
-     | RES0                         | [3-0]   |    n    |
      x--------------------------------------------------x
 
 
@@ -144,7 +139,8 @@ infrastructure:
      x--------------------------------------------------x
      | Name                         |  bits   | visible |
      |--------------------------------------------------|
-     | RES0                         | [63-28] |    n    |
+     |--------------------------------------------------|
+     | SVE                          | [35-32] |    y    |
      |--------------------------------------------------|
      | GIC                          | [27-24] |    n    |
      |--------------------------------------------------|