mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

target/ppc: Enable RADIX mmu mode for pseries TCG guest

Browse Source 
Now that we have added all the infrastructure we can enable a pseries TCG
guest to use radix.

In order to do this we have to add the appropriate bits to the
ibm,arch-vec-5-platform-support vector to represent that we support both
hash and radix mmu models.

A radix guest can now be booted in pseries tcg mode by specifying:
-cpu POWER9

Note that we assume hash, that is we allocate a hpt, until a guest tells
us otherwise via a H_REGISTER_PROCESS_TABLE call with radix specified - in
which case we free the hpt. If we were right and the guest is hash then
there's nothing for us to do.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Suraj Jitindar Singh 2017-05-02 16:37:18 +10:00 committed by David Gibson
parent d5fee0bbe6
commit 545d6e2b5c
1 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
hw/ppc/spapr.c
View File

@ -855,6 +855,8 @@ static void spapr_dt_rtas(sPAPRMachineState *spapr, void *fdt)
* option vector 5: */
static void spapr_dt_ov5_platform_support(void *fdt, int chosen)
{
PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
char val[2 * 3] = {
24, 0x00, /* Hash/Radix, filled in below. */
25, 0x00, /* Hash options: Segment Tables == no, GTSE == no. */
@ -870,8 +872,13 @@ static void spapr_dt_ov5_platform_support(void *fdt, int chosen)
val[1] = 0x00; /* Hash */
}
} else {
/* TODO: TCG case, hash */
val[1] = 0x00;
if (first_ppc_cpu->env.mmu_model & POWERPC_MMU_V3) {
/* V3 MMU supports both hash and radix (with dynamic switching) */
val[1] = 0xC0;
} else {
/* Otherwise we can only do hash */
val[1] = 0x00;
}
}
_FDT(fdt_setprop(fdt, chosen, "ibm,arch-vec-5-platform-support",
val, sizeof(val)));
@ -2101,8 +2108,8 @@ static void ppc_spapr_init(MachineState *machine)
}
spapr_ovec_set(spapr->ov5, OV5_FORM1_AFFINITY);
if (kvmppc_has_cap_mmu_radix()) {
/* KVM always allows GTSE with radix... */
if (!kvm_enabled() || kvmppc_has_cap_mmu_radix()) {
/* KVM and TCG always allow GTSE with radix... */
spapr_ovec_set(spapr->ov5, OV5_MMU_RADIX_GTSE);
}
/* ... but not with hash (currently). */