On Thu, 18 Apr 2024 16:10:57 -0700
nifan....@gmail.com wrote:
> From: Fan Ni <fan...@samsung.com>
>
> Add (file/memory backed) host backend for DCD. All the dynamic capacity
> regions will share a single, large enough host backend. Set up address
> space for DC regions to support read/write operations to dynamic capacity
> for DCD.
>
> With the change, the following support is added:
> 1. Add a new property to type3 device "volatile-dc-memdev" to point to host
> memory backend for dynamic capacity. Currently, all DC regions share one
> host backend;
> 2. Add namespace for dynamic capacity for read/write support;
> 3. Create cdat entries for each dynamic capacity region.
>
> Signed-off-by: Fan Ni <fan...@samsung.com>
One fixlet needed inline.
I've set range1_size_lo = 0 there for my tree.
> @@ -301,10 +337,16 @@ static void build_dvsecs(CXLType3Dev *ct3d)
> range2_size_lo = (2 << 5) | (2 << 2) | 0x3 |
> (ct3d->hostpmem->size & 0xF0000000);
> }
> - } else {
> + } else if (ct3d->hostpmem) {
> range1_size_hi = ct3d->hostpmem->size >> 32;
> range1_size_lo = (2 << 5) | (2 << 2) | 0x3 |
> (ct3d->hostpmem->size & 0xF0000000);
> + } else {
> + /*
> + * For DCD with no static memory, set memory active, memory class
> bits.
> + * No range is set.
> + */
range1_size_hi is not initialized.
> + range1_size_lo = (2 << 5) | (2 << 2) | 0x3;
> }
>
> dvsec = (uint8_t *)&(CXLDVSECDevice){
