linux-kernel - [PATCH 2/4] soc: sifive: ccache: Add StarFive JH7100 support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <CAJM55Z_U9R6R_t1g5KANV5hQwP91TcHYKGwbnHxXXs5fm0y7Yw@mail.gmail.com>
Date:   Wed, 25 Oct 2023 11:56:39 -0700
From:   emil.renner.berthing@...onical.com
To:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Conor Dooley <conor@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>
Subject: [PATCH 2/4] soc: sifive: ccache: Add StarFive JH7100 support

This adds support for the StarFive JH7100 SoC which also features this
SiFive cache controller.

Unfortunately the interrupt for uncorrected data is broken on the JH7100
and fires continuously, so add a quirk to not register a handler for it.

Signed-off-by: Emil Renner Berthing <kernel@...il.dk>
---
 drivers/soc/sifive/sifive_ccache.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/sifive/sifive_ccache.c
b/drivers/soc/sifive/sifive_ccache.c
index 3684f5b40a80..676468c35859 100644
--- a/drivers/soc/sifive/sifive_ccache.c
+++ b/drivers/soc/sifive/sifive_ccache.c
@@ -106,6 +106,7 @@ static void ccache_config_read(void)
 static const struct of_device_id sifive_ccache_ids[] = {
 	{ .compatible = "sifive,fu540-c000-ccache" },
 	{ .compatible = "sifive,fu740-c000-ccache" },
+	{ .compatible = "starfive,jh7100-ccache", .data = (void *)BIT(DATA_UNCORR) },
 	{ .compatible = "sifive,ccache0" },
 	{ /* end of table */ }
 };
@@ -210,11 +211,15 @@ static int __init sifive_ccache_init(void)
 	struct device_node *np;
 	struct resource res;
 	int i, rc, intr_num;
+	const struct of_device_id *match;
+	unsigned long broken_irqs;

-	np = of_find_matching_node(NULL, sifive_ccache_ids);
+	np = of_find_matching_node_and_match(NULL, sifive_ccache_ids, &match);
 	if (!np)
 		return -ENODEV;

+	broken_irqs = (uintptr_t)match->data;
+
 	if (of_address_to_resource(np, 0, &res)) {
 		rc = -ENODEV;
 		goto err_node_put;
@@ -240,6 +245,10 @@ static int __init sifive_ccache_init(void)

 	for (i = 0; i < intr_num; i++) {
 		g_irq[i] = irq_of_parse_and_map(np, i);
+
+		if (broken_irqs & BIT(i))
+			continue;
+
 		rc = request_irq(g_irq[i], ccache_int_handler, 0, "ccache_ecc",
 				 NULL);
 		if (rc) {
-- 
2.40.1