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platform/x86: mlx-platform: Add BIOS attributes for CoffeeLake COMEx based systems

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Extend systems of class VMOD0010 equipped with CoffeeLake COMEx module
with BIOS related attributes to represent various BIOS statuses.
These attributes "bios_active_image", "bios_auth_fail",
"bios_upgrade_fail", "bios_safe_mode" has been already added to modular
system. This all of them are already documented.
- "bios_active_image" - location of current active BIOS image (0: Top,
  1: Bottom. The reported value should correspond to value expected by
  OS in case of BIOS safe mode is 0. This bit is related to Intel
  top-swap feature of DualBios on the same flash.
- "bios_auth_fail": BIOS upgrade is failed because provided BIOS image
  is not signed correctly.
- "bios_upgrade_fail" BIOS upgrade is failed by some reason not related
  to authentication. For example, due to physical SPI flash problem.
- "bios_safe_mod": - 0 : if BIOS is booted from a supposed active image;
  1 : BIOS safe mechanism was enforced by hardware (CPLD).

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Oleksandr Shamray <oleksandrs@nvidia.com>
Link: https://lore.kernel.org/r/20211023094022.4193813-3-vadimp@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Vadim Pasternak 2021-10-23 12:40:21 +03:00 committed by Hans de Goede
parent 9045512ca6
commit 4289fd4ad4
1 changed files with 24 additions and 0 deletions
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24
drivers/platform/x86/mlx-platform.c
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@ -2917,6 +2917,30 @@ static struct mlxreg_core_data mlxplat_mlxcpld_default_ng_regs_io_data[] = {
.bit = GENMASK(7, 0),
.mode = 0444,
},
{
.label = "bios_safe_mode",
.reg = MLXPLAT_CPLD_LPC_REG_GPCOM0_OFFSET,
.mask = GENMASK(7, 0) & ~BIT(4),
.mode = 0444,
},
{
.label = "bios_active_image",
.reg = MLXPLAT_CPLD_LPC_REG_GPCOM0_OFFSET,
.mask = GENMASK(7, 0) & ~BIT(5),
.mode = 0444,
},
{
.label = "bios_auth_fail",
.reg = MLXPLAT_CPLD_LPC_REG_GPCOM0_OFFSET,
.mask = GENMASK(7, 0) & ~BIT(6),
.mode = 0444,
},
{
.label = "bios_upgrade_fail",
.reg = MLXPLAT_CPLD_LPC_REG_GPCOM0_OFFSET,
.mask = GENMASK(7, 0) & ~BIT(7),
.mode = 0444,
},
{
.label = "voltreg_update_status",
.reg = MLXPLAT_CPLD_LPC_REG_GP0_RO_OFFSET,