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[3/3] arm64: Add KRYO4XX silver CPU cores to erratum list 1530923 and 1024718

Message ID 7013e8a3f857ca7e82863cc9e34a614293d7f80c.1593539394.git.saiprakash.ranjan@codeaurora.org (mailing list archive)
State Mainlined
Commit 9b23d95c539ebc5d6d6b5d6f20d2d7922384e76e
Headers show
Series Add Kryo4xx gold and silver cores to applicable errata list | expand

Commit Message

Sai Prakash Ranjan June 30, 2020, 6 p.m. UTC 
KRYO4XX silver/LITTLE CPU cores with revision r1p0 are affected by
erratum 1530923 and 1024718, so add them to the respective list.
The variant and revision bits are implementation defined and are
different from the their Cortex CPU counterparts on which they are
based on, i.e., r1p0 is equivalent to rdpe.

Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
---
 Documentation/arm64/silicon-errata.rst | 4 ++++
 arch/arm64/kernel/cpu_errata.c         | 2 ++
 arch/arm64/kernel/cpufeature.c         | 2 ++
 3 files changed, 8 insertions(+)

Comments

Will Deacon July 3, 2020, 1:55 p.m. UTC | #1 
On Tue, Jun 30, 2020 at 11:30:55PM +0530, Sai Prakash Ranjan wrote:
> KRYO4XX silver/LITTLE CPU cores with revision r1p0 are affected by
> erratum 1530923 and 1024718, so add them to the respective list.
> The variant and revision bits are implementation defined and are
> different from the their Cortex CPU counterparts on which they are
> based on, i.e., r1p0 is equivalent to rdpe.

So just to confirm, revisions prior to rdpe are unaffected, or do those
parts simply not exist?

Cheers,

Will
diff mbox series

Patch

diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index f3c0c4393e7e..3f7c3a7e8a2b 100644
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst
@@ -151,6 +151,10 @@  stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | Qualcomm Tech. | Kryo4xx Gold    | N/A             | ARM64_ERRATUM_1418040       |
 +----------------+-----------------+-----------------+-----------------------------+
+| Qualcomm Tech. | Kryo4xx Silver  | N/A             | ARM64_ERRATUM_1530923       |
++----------------+-----------------+-----------------+-----------------------------+
+| Qualcomm Tech. | Kryo4xx Silver  | N/A             | ARM64_ERRATUM_1024718       |
++----------------+-----------------+-----------------+-----------------------------+
 +----------------+-----------------+-----------------+-----------------------------+
 | Fujitsu        | A64FX           | E#010001        | FUJITSU_ERRATUM_010001      |
 +----------------+-----------------+-----------------+-----------------------------+
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 044f1d7aebdf..8e302dc093d0 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -769,6 +769,8 @@  static const struct midr_range erratum_speculative_at_list[] = {
 #ifdef CONFIG_ARM64_ERRATUM_1530923
 	/* Cortex A55 r0p0 to r2p0 */
 	MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 2, 0),
+	/* Kryo4xx Silver (rdpe => r1p0) */
+	MIDR_REV(MIDR_QCOM_KRYO_4XX_SILVER, 0xd, 0xe),
 #endif
 	{},
 };
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 9f63053a63a9..9fae0efc80c1 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1408,6 +1408,8 @@  static bool cpu_has_broken_dbm(void)
 	static const struct midr_range cpus[] = {
 #ifdef CONFIG_ARM64_ERRATUM_1024718
 		MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 1, 0),  // A55 r0p0 -r1p0
+		/* Kryo4xx Silver (rdpe => r1p0) */
+		MIDR_REV(MIDR_QCOM_KRYO_4XX_SILVER, 0xd, 0xe),
 #endif
 		{},
 	};