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[Qemu-devel] [PULL 38/42] target/ppc: Add Directed Privileged Door-bell
From: |
David Gibson |
Subject: |
[Qemu-devel] [PULL 38/42] target/ppc: Add Directed Privileged Door-bell Exception State (DPDES) SPR |
Date: |
Wed, 21 Aug 2019 17:25:38 +1000 |
From: Alexey Kardashevskiy <address@hidden>
DPDES stores a status of a doorbell message and if it is lost in
migration, the destination CPU won't receive it. This does not hit us
much as IPIs complete too quick to catch a pending one and even if
we missed one, broadcasts happen often enough to wake that CPU.
This defines DPDES and registers with KVM for migration.
Signed-off-by: Alexey Kardashevskiy <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: David Gibson <address@hidden>
---
target/ppc/cpu.h | 1 +
target/ppc/translate_init.inc.c | 14 ++++++++++++++
2 files changed, 15 insertions(+)
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 50245a8c4d..4b35c8e4f4 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1466,6 +1466,7 @@ typedef PowerPCCPU ArchCPU;
#define SPR_MPC_ICTRL (0x09E)
#define SPR_MPC_BAR (0x09F)
#define SPR_PSPB (0x09F)
+#define SPR_DPDES (0x0B0)
#define SPR_DAWR (0x0B4)
#define SPR_RPR (0x0BA)
#define SPR_CIABR (0x0BB)
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
index c9fcd87095..7e41ae1456 100644
--- a/target/ppc/translate_init.inc.c
+++ b/target/ppc/translate_init.inc.c
@@ -8198,6 +8198,18 @@ static void gen_spr_power8_pspb(CPUPPCState *env)
KVM_REG_PPC_PSPB, 0);
}
+static void gen_spr_power8_dpdes(CPUPPCState *env)
+{
+#if !defined(CONFIG_USER_ONLY)
+ /* Directed Privileged Door-bell Exception State, used for IPI */
+ spr_register_kvm_hv(env, SPR_DPDES, "DPDES",
+ SPR_NOACCESS, SPR_NOACCESS,
+ &spr_read_generic, SPR_NOACCESS,
+ &spr_read_generic, &spr_write_generic,
+ KVM_REG_PPC_DPDES, 0x00000000);
+#endif
+}
+
static void gen_spr_power8_ic(CPUPPCState *env)
{
#if !defined(CONFIG_USER_ONLY)
@@ -8629,6 +8641,7 @@ static void init_proc_POWER8(CPUPPCState *env)
gen_spr_power8_pmu_user(env);
gen_spr_power8_tm(env);
gen_spr_power8_pspb(env);
+ gen_spr_power8_dpdes(env);
gen_spr_vtb(env);
gen_spr_power8_ic(env);
gen_spr_power8_book4(env);
@@ -8817,6 +8830,7 @@ static void init_proc_POWER9(CPUPPCState *env)
gen_spr_power8_pmu_user(env);
gen_spr_power8_tm(env);
gen_spr_power8_pspb(env);
+ gen_spr_power8_dpdes(env);
gen_spr_vtb(env);
gen_spr_power8_ic(env);
gen_spr_power8_book4(env);
--
2.21.0
- [Qemu-devel] [PULL 20/42] spapr: initial implementation for H_TPM_COMM/spapr-tpm-proxy, (continued)
- [Qemu-devel] [PULL 20/42] spapr: initial implementation for H_TPM_COMM/spapr-tpm-proxy, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 29/42] machine: Add wakeup method to MachineClass, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 23/42] ppc/xive: Implement TM_PULL_OS_CTX special command, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 34/42] spapr/pci: Free MSIs during reset, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 21/42] pseries: Update SLOF firmware image, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 37/42] spapr/xive: Mask the EAS when allocating an IRQ, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 25/42] ppc/xive: Provide escalation support, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 35/42] spapr/irq: Drop spapr_irq_msi_reset(), David Gibson, 2019/08/21
- [Qemu-devel] [PULL 28/42] ppc/xive: Improve 'info pic' support, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 36/42] spapr: Implement better workaround in spapr-vty device, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 38/42] target/ppc: Add Directed Privileged Door-bell Exception State (DPDES) SPR,
David Gibson <=
- [Qemu-devel] [PULL 30/42] i386: use machine class ->wakeup method, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 22/42] ppc/xive: use an abstract type for XiveNotifier, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 27/42] ppc/xive: Provide silent escalation support, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 41/42] ppc: Fix emulated INFINITY and NAN conversions, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 31/42] spapr: Implement ibm,suspend-me, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 24/42] ppc/xive: Provide backlog support, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 32/42] ppc: remove idle_timer logic, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 42/42] ppc: Fix emulated single to double denormalized conversions, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 40/42] ppc: conform to processor User's Manual for xscvdpspn, David Gibson, 2019/08/21
- [Qemu-devel] [PULL 39/42] ppc: Add support for 'mffsl' instruction, David Gibson, 2019/08/21