linux-kernel - [PATCH 3/3] irqchip/gic-v3: Remove Mediatek pseudo-NMI firmware quirk handling

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Message-ID: <20231006151547.3.Ie582d33cfe46f9ec2248e7f2dabdd6bbd66486a6@changeid>
Date:   Fri,  6 Oct 2023 15:15:53 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Marc Zyngier <maz@...nel.org>, Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Chen-Yu Tsai <wenst@...omium.org>
Cc:     Douglas Anderson <dianders@...omium.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH 3/3] irqchip/gic-v3: Remove Mediatek pseudo-NMI firmware quirk handling

This is a partial revert of commit 44bd78dd2b88 ("irqchip/gic-v3:
Disable pseudo NMIs on Mediatek devices w/ firmware issues"). In the
patch ("arm64: Disable GiC priorities on Mediatek devices w/ firmware
issues") we've moved the quirk handling to another place and so it's
not needed in the GiC driver.

NOTE: this isn't a full revert because it leaves some of the changes
to the "quirks" structure around in case future code needs it.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 drivers/irqchip/irq-gic-v3.c | 22 +---------------------
 1 file changed, 1 insertion(+), 21 deletions(-)

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 787ccc880b22..9ff776709ae6 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -39,8 +39,7 @@
 
 #define FLAGS_WORKAROUND_GICR_WAKER_MSM8996	(1ULL << 0)
 #define FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539	(1ULL << 1)
-#define FLAGS_WORKAROUND_MTK_GICR_SAVE		(1ULL << 2)
-#define FLAGS_WORKAROUND_ASR_ERRATUM_8601001	(1ULL << 3)
+#define FLAGS_WORKAROUND_ASR_ERRATUM_8601001	(1ULL << 2)
 
 #define GIC_IRQ_TYPE_PARTITION	(GIC_IRQ_TYPE_LPI + 1)
 
@@ -1790,15 +1789,6 @@ static bool gic_enable_quirk_msm8996(void *data)
 	return true;
 }
 
-static bool gic_enable_quirk_mtk_gicr(void *data)
-{
-	struct gic_chip_data *d = data;
-
-	d->flags |= FLAGS_WORKAROUND_MTK_GICR_SAVE;
-
-	return true;
-}
-
 static bool gic_enable_quirk_cavium_38539(void *data)
 {
 	struct gic_chip_data *d = data;
@@ -1891,11 +1881,6 @@ static const struct gic_quirk gic_quirks[] = {
 		.compatible = "asr,asr8601-gic-v3",
 		.init	= gic_enable_quirk_asr8601,
 	},
-	{
-		.desc	= "GICv3: Mediatek Chromebook GICR save problem",
-		.property = "mediatek,broken-save-restore-fw",
-		.init	= gic_enable_quirk_mtk_gicr,
-	},
 	{
 		.desc	= "GICv3: HIP06 erratum 161010803",
 		.iidr	= 0x0204043b,
@@ -1957,11 +1942,6 @@ static void gic_enable_nmi_support(void)
 	if (!gic_prio_masking_enabled())
 		return;
 
-	if (gic_data.flags & FLAGS_WORKAROUND_MTK_GICR_SAVE) {
-		pr_warn("Skipping NMI enable due to firmware issues\n");
-		return;
-	}
-
 	rdist_nmi_refs = kcalloc(gic_data.ppi_nr + SGI_NR,
 				 sizeof(*rdist_nmi_refs), GFP_KERNEL);
 	if (!rdist_nmi_refs)
-- 
2.42.0.609.gbb76f46606-goog