[v2,2/3] hw/riscv/virt-acpi-build: Expose device memory in ACPI SRAT

Commit Message

Björn Töpel May 21, 2024, 10:56 a.m. UTC

From: Björn Töpel <[e-mail]>

Now that device memory is supported by RISC-V 'virt', expose that
region in the ACPI SRAT (System/Static Resource Affinity Table).

ACPI SRAT is used by, e.g., the virtio-mem Linux kernel driver [1].

Link: https://virtio-mem.gitlab.io/user-guide/user-guide-linux.html # [1]
Signed-off-by: Björn Töpel <[e-mail]>
---
 hw/riscv/virt-acpi-build.c | 7 +++++++
 1 file changed, 7 insertions(+)

Patch

diff --git a/hw/riscv/virt-acpi-build.c b/hw/riscv/virt-acpi-build.c
index 0925528160f8..6dc3baa9ec86 100644
--- a/hw/riscv/virt-acpi-build.c
+++ b/hw/riscv/virt-acpi-build.c
@@ -610,6 +610,13 @@  build_srat(GArray *table_data, BIOSLinker *linker, RISCVVirtState *vms)
         }
     }
 
+    if (ms->device_memory) {
+        build_srat_memory(table_data, ms->device_memory->base,
+                          memory_region_size(&ms->device_memory->mr),
+                          ms->numa_state->num_nodes - 1,
+                          MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED);
+    }
+
     acpi_table_end(linker, &table);
 }