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target/ppc: Implement H_REGISTER_PROCESS_TABLE H_CALL

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The H_REGISTER_PROCESS_TABLE H_CALL is used by a guest to indicate to the
hypervisor where in memory its process table is and how translation should
be performed using this process table.

Provide the implementation of this H_CALL for a guest.

We first check for invalid flags, then parse the flags to determine the
operation, and then check the other parameters for valid values based on
the operation (register new table/deregister table/maintain registration).
The process table is then stored in the appropriate location and registered
with the hypervisor (if running under KVM), and the LPCR_[UPRT/GTSE] bits
are updated as required.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
[dwg: Correct missing prototype and uninitialized variable]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Suraj Jitindar Singh 2017-03-20 10:46:46 +11:00 • committed by David Gibson
parent d77a98b015
commit b4db54132f
5 changed files with 176 additions and 15 deletions
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35
hw/ppc/spapr.c
View file

@ -40,6 +40,7 @@
#include "kvm_ppc.h"
#include "migration/migration.h"
#include "mmu-hash64.h"
#include "mmu-book3s-v3.h"
#include "qom/cpu.h"
#include "hw/boards.h"
@ -1113,7 +1114,7 @@ static int get_htab_fd(sPAPRMachineState *spapr)
return spapr->htab_fd;
}
static void close_htab_fd(sPAPRMachineState *spapr)
void close_htab_fd(sPAPRMachineState *spapr)
{
if (spapr->htab_fd >= 0) {
close(spapr->htab_fd);
@ -1240,6 +1241,19 @@ static void spapr_reallocate_hpt(sPAPRMachineState *spapr, int shift,
}
}
void spapr_setup_hpt_and_vrma(sPAPRMachineState *spapr)
{
spapr_reallocate_hpt(spapr,
spapr_hpt_shift_for_ramsize(MACHINE(spapr)->maxram_size),
&error_fatal);
if (spapr->vrma_adjust) {
spapr->rma_size = kvmppc_rma_size(spapr_node0_size(),
spapr->htab_shift);
}
/* We're setting up a hash table, so that means we're not radix */
spapr->patb_entry = 0;
}
static void find_unknown_sysbus_device(SysBusDevice *sbdev, void *opaque)
{
bool matched = false;
@ -1268,17 +1282,14 @@ static void ppc_spapr_reset(void)
/* Check for unknown sysbus devices */
foreach_dynamic_sysbus_device(find_unknown_sysbus_device, NULL);
spapr->patb_entry = 0;
/* Allocate and/or reset the hash page table */
spapr_reallocate_hpt(spapr,
spapr_hpt_shift_for_ramsize(machine->maxram_size),
&error_fatal);
/* Update the RMA size if necessary */
if (spapr->vrma_adjust) {
spapr->rma_size = kvmppc_rma_size(spapr_node0_size(),
spapr->htab_shift);
if (kvm_enabled() && kvmppc_has_cap_mmu_radix()) {
/* If using KVM with radix mode available, VCPUs can be started
* without a HPT because KVM will start them in radix mode.
* Set the GR bit in PATB so that we know there is no HPT. */
spapr->patb_entry = PATBE1_GR;
} else {
spapr->patb_entry = 0;
spapr_setup_hpt_and_vrma(spapr);
}
qemu_devices_reset();