pseries: Stubs for HPT resizing
This introduces stub implementations of the H_RESIZE_HPT_PREPARE and
H_RESIZE_HPT_COMMIT hypercalls which we hope to add in a PAPR
extension to allow run time resizing of a guest's hash page table. It
also adds a new machine property for controlling whether this new
facility is available.
For now we only allow resizing with TCG, allowing it with KVM will require
kernel changes as well.
Finally, it adds a new string to the hypertas property in the device
tree, advertising to the guest the availability of the HPT resizing
hypercalls. This is a tentative suggested value, and would need to be
standardized by PAPR before being merged.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 2ddec02..10ddb90 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -42,6 +42,13 @@
#define SPAPR_MACHINE_CLASS(klass) \
OBJECT_CLASS_CHECK(sPAPRMachineClass, klass, TYPE_SPAPR_MACHINE)
+typedef enum {
+ SPAPR_RESIZE_HPT_DEFAULT = 0,
+ SPAPR_RESIZE_HPT_DISABLED,
+ SPAPR_RESIZE_HPT_ENABLED,
+ SPAPR_RESIZE_HPT_REQUIRED,
+} sPAPRResizeHPT;
+
/**
* sPAPRMachineClass:
*/
@@ -58,6 +65,7 @@
uint64_t *buid, hwaddr *pio,
hwaddr *mmio32, hwaddr *mmio64,
unsigned n_dma, uint32_t *liobns, Error **errp);
+ sPAPRResizeHPT resize_hpt_default;
};
/**
@@ -73,6 +81,7 @@
ICSState *ics;
sPAPRRTCState rtc;
+ sPAPRResizeHPT resize_hpt;
void *htab;
uint32_t htab_shift;
uint64_t patb_entry; /* Process tbl registed in H_REGISTER_PROCESS_TABLE */
@@ -367,6 +376,8 @@
#define H_XIRR_X 0x2FC
#define H_RANDOM 0x300
#define H_SET_MODE 0x31C
+#define H_RESIZE_HPT_PREPARE 0x36C
+#define H_RESIZE_HPT_COMMIT 0x370
#define H_CLEAN_SLB 0x374
#define H_INVALIDATE_PID 0x378
#define H_REGISTER_PROC_TBL 0x37C
