Ingo, do you prefer to merge through our tree with your ack?
Quoting Paulo Zanoni (2018-05-04 23:32:51)
> ICL changes the registers and addresses to 64 bits.
>
> I also briefly looked at implementing an u64 version of the PCI config
> read functions, but I concluded this wouldn't be trivial, so it's not
> worth doing it for a single user that can't have any racing problems
> while reading the register in two separate operations.
>
> v2:
> - Scrub the development (non-public) changelog (Joonas).
> - Remove the i915.ko bits so this can be easily backported in order
> to properly avoid stolen memory even on machines without i915.ko
> (Joonas).
> - CC stable for the reasons above.
>
> Issue: VIZ-9250
Fixes: 412310019a20 ("drm/i915/icl: Add initial Icelake definitions.")
> CC: stable@xxxxxxxxxxxxxxx
This should not be needed, it was introduced in v4.17-rc1 only.
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Regards, Joonas
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: H. Peter Anvin <hpa@xxxxxxxxx>
> Cc: x86@xxxxxxxxxx
> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
> ---
> arch/x86/kernel/early-quirks.c | 18 ++++++++++++++++++
> include/drm/i915_drm.h | 4 +++-
> 2 files changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
> index bae0d32e327b..72c2cf961d44 100644
> --- a/arch/x86/kernel/early-quirks.c
> +++ b/arch/x86/kernel/early-quirks.c
> @@ -340,6 +340,18 @@ static resource_size_t __init gen3_stolen_base(int num, int slot, int func,
> return bsm & INTEL_BSM_MASK;
> }
>
> +static resource_size_t __init gen11_stolen_base(int num, int slot, int func,
> + resource_size_t stolen_size)
> +{
> + u64 bsm;
> +
> + bsm = read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW0);
> + bsm &= INTEL_BSM_MASK;
> + bsm |= (u64)read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW1) << 32;
> +
> + return bsm;
> +}
> +
> static resource_size_t __init i830_stolen_size(int num, int slot, int func)
> {
> u16 gmch_ctrl;
> @@ -500,6 +512,11 @@ static const struct intel_early_ops chv_early_ops __initconst = {
> .stolen_size = chv_stolen_size,
> };
>
> +static const struct intel_early_ops gen11_early_ops __initconst = {
> + .stolen_base = gen11_stolen_base,
> + .stolen_size = gen9_stolen_size,
> +};
> +
> static const struct pci_device_id intel_early_ids[] __initconst = {
> INTEL_I830_IDS(&i830_early_ops),
> INTEL_I845G_IDS(&i845_early_ops),
> @@ -531,6 +548,7 @@ static const struct pci_device_id intel_early_ids[] __initconst = {
> INTEL_CFL_IDS(&gen9_early_ops),
> INTEL_GLK_IDS(&gen9_early_ops),
> INTEL_CNL_IDS(&gen9_early_ops),
> + INTEL_ICL_11_IDS(&gen11_early_ops),
> };
>
> struct resource intel_graphics_stolen_res __ro_after_init = DEFINE_RES_MEM(0, 0);
> diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
> index c9e5a6621b95..c44703f471b3 100644
> --- a/include/drm/i915_drm.h
> +++ b/include/drm/i915_drm.h
> @@ -95,7 +95,9 @@ extern struct resource intel_graphics_stolen_res;
> #define I845_TSEG_SIZE_512K (2 << 1)
> #define I845_TSEG_SIZE_1M (3 << 1)
>
> -#define INTEL_BSM 0x5c
> +#define INTEL_BSM 0x5c
> +#define INTEL_GEN11_BSM_DW0 0xc0
> +#define INTEL_GEN11_BSM_DW1 0xc4
> #define INTEL_BSM_MASK (-(1u << 20))
>
> #endif /* _I915_DRM_H_ */
> --
> 2.14.3
>
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