Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
soc/tegra: fuse: Add nvmem keepout list
On Tegra186 and later, various FUSE offsets are restricted and cannot be
accessed from CCPLEX. Currently nvmem binary interface allows reading
such offsets from userspace, which results in RAS errors.
Add nvmem keepout lists to avoid any reads to restricted offsets.
Signed-off-by: Kartik <kkartik@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
authored by
Kartik
and committed by
Thierry Reding
cc5b2ad5
bea06d77
+42
+2
drivers/soc/tegra/fuse/fuse-tegra.c
+2
drivers/soc/tegra/fuse/fuse-tegra.c
···
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nvmem.owner = THIS_MODULE;
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nvmem.cells = fuse->soc->cells;
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nvmem.ncells = fuse->soc->num_cells;
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nvmem.keepout = fuse->soc->keepouts;
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nvmem.nkeepout = fuse->soc->num_keepouts;
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nvmem.type = NVMEM_TYPE_OTP;
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nvmem.read_only = true;
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nvmem.root_only = true;
+38
drivers/soc/tegra/fuse/fuse-tegra30.c
+38
drivers/soc/tegra/fuse/fuse-tegra30.c
···
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/nvmem-consumer.h>
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+
#include <linux/nvmem-provider.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
···
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},
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};
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+
static const struct nvmem_keepout tegra186_fuse_keepouts[] = {
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{ .start = 0x01c, .end = 0x0f0 },
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+
{ .start = 0x138, .end = 0x198 },
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{ .start = 0x1d8, .end = 0x250 },
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{ .start = 0x280, .end = 0x290 },
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{ .start = 0x340, .end = 0x344 }
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};
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static const struct tegra_fuse_info tegra186_fuse_info = {
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.read = tegra30_fuse_read,
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.size = 0x478,
···
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.num_lookups = ARRAY_SIZE(tegra186_fuse_lookups),
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.cells = tegra186_fuse_cells,
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.num_cells = ARRAY_SIZE(tegra186_fuse_cells),
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+
.keepouts = tegra186_fuse_keepouts,
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.num_keepouts = ARRAY_SIZE(tegra186_fuse_keepouts),
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.soc_attr_group = &tegra_soc_attr_group,
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.clk_suspend_on = false,
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};
···
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},
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};
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+
static const struct nvmem_keepout tegra194_fuse_keepouts[] = {
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{ .start = 0x01c, .end = 0x0b8 },
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{ .start = 0x12c, .end = 0x198 },
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{ .start = 0x1a0, .end = 0x1bc },
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{ .start = 0x1d8, .end = 0x250 },
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{ .start = 0x270, .end = 0x290 },
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{ .start = 0x310, .end = 0x45c }
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};
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+
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static const struct tegra_fuse_info tegra194_fuse_info = {
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.read = tegra30_fuse_read,
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.size = 0x650,
···
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.num_lookups = ARRAY_SIZE(tegra194_fuse_lookups),
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.cells = tegra194_fuse_cells,
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.num_cells = ARRAY_SIZE(tegra194_fuse_cells),
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.keepouts = tegra194_fuse_keepouts,
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.num_keepouts = ARRAY_SIZE(tegra194_fuse_keepouts),
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.soc_attr_group = &tegra194_soc_attr_group,
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.clk_suspend_on = false,
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};
···
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},
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};
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+
static const struct nvmem_keepout tegra234_fuse_keepouts[] = {
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{ .start = 0x01c, .end = 0x0c8 },
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{ .start = 0x12c, .end = 0x184 },
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+
{ .start = 0x190, .end = 0x198 },
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+
{ .start = 0x1a0, .end = 0x204 },
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+
{ .start = 0x21c, .end = 0x250 },
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{ .start = 0x25c, .end = 0x2f0 },
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+
{ .start = 0x310, .end = 0x3d8 },
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{ .start = 0x400, .end = 0x4f0 },
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{ .start = 0x4f8, .end = 0x7e8 },
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{ .start = 0x8d0, .end = 0x8d8 },
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{ .start = 0xacc, .end = 0xf00 }
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};
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static const struct tegra_fuse_info tegra234_fuse_info = {
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.read = tegra30_fuse_read,
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.size = 0x98c,
···
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.num_lookups = ARRAY_SIZE(tegra234_fuse_lookups),
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.cells = tegra234_fuse_cells,
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.num_cells = ARRAY_SIZE(tegra234_fuse_cells),
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.keepouts = tegra234_fuse_keepouts,
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.num_keepouts = ARRAY_SIZE(tegra234_fuse_keepouts),
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.soc_attr_group = &tegra194_soc_attr_group,
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.clk_suspend_on = false,
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};