diff mbox series

arm64: add Cortex-A76 to spectre v2 safe-list

Message ID 20200112151014.2593-1-parkch98@gmail.com (mailing list archive)
State New, archived
Headers show
Series arm64: add Cortex-A76 to spectre v2 safe-list | expand

Commit Message

Chanho Park Jan. 12, 2020, 3:10 p.m. UTC 
Cortex A76(Enyo) core can be added in spectre v2(CVE-2017-5715 (Spectre,
Variant 2, Branch Target Injection) safe list.

Signed-off-by: Chanho Park <parkch98@gmail.com>
---
 arch/arm64/kernel/cpu_errata.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Marc Zyngier Jan. 13, 2020, 9:22 a.m. UTC | #1 
On 2020-01-12 15:10, Chanho Park wrote:
> Cortex A76(Enyo) core can be added in spectre v2(CVE-2017-5715 
> (Spectre,
> Variant 2, Branch Target Injection) safe list.
> 
> Signed-off-by: Chanho Park <parkch98@gmail.com>
> ---
>  arch/arm64/kernel/cpu_errata.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/kernel/cpu_errata.c 
> b/arch/arm64/kernel/cpu_errata.c
> index 85f4bec22f6d..9895d56bf5ac 100644
> --- a/arch/arm64/kernel/cpu_errata.c
> +++ b/arch/arm64/kernel/cpu_errata.c
> @@ -546,6 +546,7 @@ static const struct midr_range 
> spectre_v2_safe_list[] = {
>  	MIDR_ALL_VERSIONS(MIDR_CORTEX_A35),
>  	MIDR_ALL_VERSIONS(MIDR_CORTEX_A53),
>  	MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
> +	MIDR_ALL_VERSIONS(MIDR_CORTEX_A76),
>  	MIDR_ALL_VERSIONS(MIDR_BRAHMA_B53),
>  	MIDR_ALL_VERSIONS(MIDR_HISI_TSV110),
>  	{ /* sentinel */ }

Why? Doesn't Cortex-A76 already advertize ID_AA64PFR0_EL1.CSV2?

         M.
diff mbox series

Patch

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 85f4bec22f6d..9895d56bf5ac 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -546,6 +546,7 @@  static const struct midr_range spectre_v2_safe_list[] = {
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A35),
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A53),
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
+	MIDR_ALL_VERSIONS(MIDR_CORTEX_A76),
 	MIDR_ALL_VERSIONS(MIDR_BRAHMA_B53),
 	MIDR_ALL_VERSIONS(MIDR_HISI_TSV110),
 	{ /* sentinel */ }