linux-kernel - [PATCH 17/17] arm64: arch_timer: Add HISILICON_ERRATUM

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Date:   Mon,  6 Mar 2017 11:26:22 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Mark Rutland <mark.rutland@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Scott Wood <oss@...error.net>,
        Will Deacon <will.deacon@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        Ding Tianhong <dingtianhong@...wei.com>
Subject: [PATCH 17/17] arm64: arch_timer: Add HISILICON_ERRATUM_161010101 ACPI matching data

In order to deal with ACPI enabled platforms suffering from the
HISILICON_ERRATUM_161010101, let's add the required OEM data that
allow the workaround to be enabled.

Signed-off-by: Marc Zyngier <marc.zyngier@....com>
---
 drivers/clocksource/arm_arch_timer.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 6182871af4eb..b46584f058b6 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -270,6 +270,25 @@ static u64 notrace hisi_161010101_read_cntvct_el0(void)
 {
 	return __hisi_161010101_read_reg(cntvct_el0);
 }
+
+static struct ate_acpi_oem_info hisi_161010101_oem_info[] = {
+	{
+		.oem_id		= "HISI  ",
+		.oem_table_id	= "HIP05   ",
+		.oem_revision	= 0,
+	},
+	{
+		.oem_id		= "HISI  ",
+		.oem_table_id	= "HIP06   ",
+		.oem_revision	= 0,
+	},
+	{
+		.oem_id		= "HISI  ",
+		.oem_table_id	= "HIP07   ",
+		.oem_revision	= 0,
+	},
+	{ },
+};
 #endif
 
 #ifdef CONFIG_ARM64_ERRATUM_858921
@@ -347,6 +366,16 @@ static const struct arch_timer_erratum_workaround ool_workarounds[] = {
 		.set_next_event_phys = erratum_set_next_event_tval_phys,
 		.set_next_event_virt = erratum_set_next_event_tval_virt,
 	},
+	{
+		.match_type = ate_match_acpi_oem_info,
+		.id = hisi_161010101_oem_info,
+		.desc_str = "HiSilicon erratum 161010101",
+		.read_cntp_tval_el0 = hisi_161010101_read_cntp_tval_el0,
+		.read_cntv_tval_el0 = hisi_161010101_read_cntv_tval_el0,
+		.read_cntvct_el0 = hisi_161010101_read_cntvct_el0,
+		.set_next_event_phys = erratum_set_next_event_tval_phys,
+		.set_next_event_virt = erratum_set_next_event_tval_virt,
+	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_858921
 	{
-- 
2.11.0