As per the PAPR, bit 0 of byte 64 in pa-features property indicates
availability of 2nd DAWR registers. i.e. If this bit is set, 2nd
DAWR is present, otherwise not. Use KVM_CAP_PPC_DAWR1 capability to
find whether kvm supports 2nd DAWR or nor. If it's supported, set
the pa-feature bit in guest DT so the guest kernel can support 2nd
DAWR.
Signed-off-by: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx>
---
hw/ppc/spapr.c | 33 +++++++++++++++++++++++++++++++++
include/hw/ppc/spapr.h | 1 +
linux-headers/asm-powerpc/kvm.h | 4 ++++
linux-headers/linux/kvm.h | 1 +
target/ppc/cpu.h | 2 ++
target/ppc/kvm.c | 7 +++++++
target/ppc/kvm_ppc.h | 6 ++++++
target/ppc/translate_init.inc.c | 17 ++++++++++++++++-
8 files changed, 70 insertions(+), 1 deletion(-)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 0ae293ec94..4416319363 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -252,6 +252,31 @@ static void spapr_dt_pa_features(SpaprMachineState *spapr,
/* 60: NM atomic, 62: RNG */
0x80, 0x00, 0x80, 0x00, 0x00, 0x00, /* 60 - 65 */
};
+ uint8_t pa_features_310[] = { 66, 0,
+ /* 0: MMU|FPU|SLB|RUN|DABR|NX, 1: fri[nzpm]|DABRX|SPRG3|SLB0|PP110 */
+ /* 2: VPM|DS205|PPR|DS202|DS206, 3: LSD|URG, SSO, 5: LE|CFAR|EB|LSQ */
+ 0xf6, 0x1f, 0xc7, 0xc0, 0x80, 0xf0, /* 0 - 5 */
+ /* 6: DS207 */
+ 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, /* 6 - 11 */
+ /* 16: Vector */
+ 0x00, 0x00, 0x00, 0x00, 0x80, 0x00, /* 12 - 17 */
+ /* 18: Vec. Scalar, 20: Vec. XOR, 22: HTM */
+ 0x80, 0x00, 0x80, 0x00, 0x00, 0x00, /* 18 - 23 */
+ /* 24: Ext. Dec, 26: 64 bit ftrs, 28: PM ftrs */
+ 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 24 - 29 */
+ /* 30: MMR, 32: LE atomic, 34: EBB + ext EBB */
+ 0x80, 0x00, 0x80, 0x00, 0xC0, 0x00, /* 30 - 35 */
+ /* 36: SPR SO, 38: Copy/Paste, 40: Radix MMU */
+ 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 36 - 41 */
+ /* 42: PM, 44: PC RA, 46: SC vec'd */
+ 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 42 - 47 */
+ /* 48: SIMD, 50: QP BFP, 52: String */
+ 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 48 - 53 */
+ /* 54: DecFP, 56: DecI, 58: SHA */
+ 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 54 - 59 */
+ /* 60: NM atomic, 62: RNG, 64: DAWR1 */
+ 0x80, 0x00, 0x80, 0x00, 0x00, 0x00, /* 60 - 65 */
+ };
uint8_t *pa_features = NULL;
size_t pa_size;
@@ -267,6 +292,10 @@ static void spapr_dt_pa_features(SpaprMachineState *spapr,
pa_features = pa_features_300;
pa_size = sizeof(pa_features_300);
}
+ if (ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_10, 0, cpu->compat_pvr)) {
+ pa_features = pa_features_310;
+ pa_size = sizeof(pa_features_310);
+ }
if (!pa_features) {
return;
}
@@ -291,6 +320,10 @@ static void spapr_dt_pa_features(SpaprMachineState *spapr,
pa_features[40 + 2] &= ~0x80; /* Radix MMU */
}
+ if (kvm_enabled() && kvmppc_has_cap_dawr1()) {
+ pa_features[66] |= 0x80;
+ }
+
_FDT((fdt_setprop(fdt, offset, "ibm,pa-features", pa_features, pa_size)));
}
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 6ba43bc9b8..2f2beb4571 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -352,6 +352,7 @@ struct SpaprMachineState {
#define H_SET_MODE_RESOURCE_SET_DAWR0 2
#define H_SET_MODE_RESOURCE_ADDR_TRANS_MODE 3
#define H_SET_MODE_RESOURCE_LE 4
+#define H_SET_MODE_RESOURCE_SET_DAWR1 5
/* Flags for H_SET_MODE_RESOURCE_LE */
#define H_SET_MODE_ENDIAN_BIG 0
diff --git a/linux-headers/asm-powerpc/kvm.h b/linux-headers/asm-powerpc/kvm.h
index 38d61b73f5..c5c0f128b4 100644
--- a/linux-headers/asm-powerpc/kvm.h
+++ b/linux-headers/asm-powerpc/kvm.h
@@ -640,6 +640,10 @@ struct kvm_ppc_cpu_char {
#define KVM_REG_PPC_ONLINE (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xbf)
#define KVM_REG_PPC_PTCR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc0)
+/* POWER10 registers. */
+#define KVM_REG_PPC_DAWR1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc1)
+#define KVM_REG_PPC_DAWRX1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc2)
+
/* Transactional Memory checkpointed state:
* This is all GPRs, all VSX regs and a subset of SPRs
*/
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index a28c366737..015fa4b44b 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -1031,6 +1031,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_PPC_SECURE_GUEST 181
#define KVM_CAP_HALT_POLL 182
#define KVM_CAP_ASYNC_PF_INT 183
+#define KVM_CAP_PPC_DAWR1 184
#ifdef KVM_CAP_IRQ_ROUTING
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 0f641becf7..52e17ef013 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1465,9 +1465,11 @@ typedef PowerPCCPU ArchCPU;
#define SPR_PSPB (0x09F)
#define SPR_DPDES (0x0B0)
#define SPR_DAWR0 (0x0B4)
+#define SPR_DAWR1 (0x0B5)
#define SPR_RPR (0x0BA)
#define SPR_CIABR (0x0BB)
#define SPR_DAWRX0 (0x0BC)
+#define SPR_DAWRX1 (0x0BD)
#define SPR_HFSCR (0x0BE)
#define SPR_VRSAVE (0x100)
#define SPR_USPRG0 (0x100)
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 2692f76130..cbcf9990be 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -89,6 +89,7 @@ static int cap_ppc_count_cache_flush_assist;
static int cap_ppc_nested_kvm_hv;
static int cap_large_decr;
static int cap_fwnmi;
+static int cap_dawr1;
static uint32_t debug_inst_opcode;
@@ -138,6 +139,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_ppc_nested_kvm_hv = kvm_vm_check_extension(s, KVM_CAP_PPC_NESTED_HV);
cap_large_decr = kvmppc_get_dec_bits();
cap_fwnmi = kvm_vm_check_extension(s, KVM_CAP_PPC_FWNMI);
+ cap_dawr1 = kvm_vm_check_extension(s, KVM_CAP_PPC_DAWR1);
/*
* Note: setting it to false because there is not such capability
* in KVM at this moment.
@@ -2079,6 +2081,11 @@ int kvmppc_set_fwnmi(void)
return kvm_vcpu_enable_cap(cs, KVM_CAP_PPC_FWNMI, 0);
}
+bool kvmppc_has_cap_dawr1(void)
+{
+ return cap_dawr1;
+}
+
int kvmppc_smt_threads(void)
{
return cap_ppc_smt ? cap_ppc_smt : 1;
diff --git a/target/ppc/kvm_ppc.h b/target/ppc/kvm_ppc.h
index 701c0c262b..5db14e7096 100644
--- a/target/ppc/kvm_ppc.h
+++ b/target/ppc/kvm_ppc.h
@@ -64,6 +64,7 @@ bool kvmppc_has_cap_htm(void);
bool kvmppc_has_cap_mmu_radix(void);
bool kvmppc_has_cap_mmu_hash_v3(void);
bool kvmppc_has_cap_xive(void);
+bool kvmppc_has_cap_dawr1(void);
int kvmppc_get_cap_safe_cache(void);
int kvmppc_get_cap_safe_bounds_check(void);
int kvmppc_get_cap_safe_indirect_branch(void);
@@ -346,6 +347,11 @@ static inline bool kvmppc_has_cap_xive(void)
return false;
}
+static inline bool kvmppc_has_cap_dawr1(void)
+{
+ return false;
+}
+
static inline int kvmppc_get_cap_safe_cache(void)
{
return 0;
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
index 143adf27c0..dcd4fe0cb1 100644
--- a/target/ppc/translate_init.inc.c
+++ b/target/ppc/translate_init.inc.c
@@ -7684,6 +7684,21 @@ static void gen_spr_book3s_207_dbg(CPUPPCState *env)
KVM_REG_PPC_CIABR, 0x00000000);
}
+static void gen_spr_book3s_310_dbg(CPUPPCState *env)
+{
+ gen_spr_book3s_207_dbg(env);
+ spr_register_kvm_hv(env, SPR_DAWR1, "DAWR1",
+ SPR_NOACCESS, SPR_NOACCESS,
+ SPR_NOACCESS, SPR_NOACCESS,
+ &spr_read_generic, &spr_write_generic,
+ KVM_REG_PPC_DAWR1, 0x00000000);
+ spr_register_kvm_hv(env, SPR_DAWRX1, "DAWRX1",
+ SPR_NOACCESS, SPR_NOACCESS,
+ SPR_NOACCESS, SPR_NOACCESS,
+ &spr_read_generic, &spr_write_generic,
+ KVM_REG_PPC_DAWRX1, 0x00000000);
+}
+
static void gen_spr_970_dbg(CPUPPCState *env)
{
/* Breakpoints */
@@ -9060,7 +9075,7 @@ static void init_proc_POWER10(CPUPPCState *env)
{
/* Common Registers */
init_proc_book3s_common(env);
- gen_spr_book3s_207_dbg(env);
+ gen_spr_book3s_310_dbg(env);
/* POWER8 Specific Registers */
gen_spr_book3s_ids(env);
--
2.17.1
