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PCI: keystone: Prevent ARM32 specific code to be compiled for ARM64
[ Upstream commit f316a2b53c
]
hook_fault_code() is an ARM32 specific API for hooking into data abort.
AM65X platforms (that integrate ARM v8 cores and select CONFIG_ARM64 as
arch) rely on pci-keystone.c but on them the enumeration of a
non-present BDF does not trigger a bus error, so the fixup exception
provided by calling hook_fault_code() is not needed and can be guarded
with CONFIG_ARM.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
[lorenzo.pieralisi@arm.com: commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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parent
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1 changed files with 4 additions and 0 deletions
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@ -240,6 +240,7 @@ static void ks_pcie_setup_interrupts(struct keystone_pcie *ks_pcie)
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ks_dw_pcie_enable_error_irq(ks_pcie);
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}
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#ifdef CONFIG_ARM
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/*
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* When a PCI device does not exist during config cycles, keystone host gets a
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* bus error instead of returning 0xffffffff. This handler always returns 0
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@ -259,6 +260,7 @@ static int keystone_pcie_fault(unsigned long addr, unsigned int fsr,
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return 0;
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}
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#endif
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static int __init ks_pcie_host_init(struct pcie_port *pp)
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{
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@ -282,12 +284,14 @@ static int __init ks_pcie_host_init(struct pcie_port *pp)
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val |= BIT(12);
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writel(val, pci->dbi_base + PCIE_CAP_BASE + PCI_EXP_DEVCTL);
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#ifdef CONFIG_ARM
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/*
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* PCIe access errors that result into OCP errors are caught by ARM as
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* "External aborts"
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*/
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hook_fault_code(17, keystone_pcie_fault, SIGBUS, 0,
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"Asynchronous external abort");
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#endif
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return 0;
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}
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