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[Qemu-ppc] [PATCH 41/64] pseries: Add real mode debugging hcalls
From: |
Alexander Graf |
Subject: |
[Qemu-ppc] [PATCH 41/64] pseries: Add real mode debugging hcalls |
Date: |
Thu, 6 Oct 2011 10:05:43 +0200 |
From: David Gibson <address@hidden>
PAPR systems support several hypercalls intended for use in real mode
debugging tools. These implement reads and writes to arbitrary guest
physical addresses. This is useful for real mode software because it
allows access to IO addresses and memory outside the RMA without going
through the somewhat involved process of setting up the hash page table
and enabling translation.
We want these so that when we add real IO devices, the SLOF firmware can
boot from them without having to enter virtual mode.
Signed-off-by: Benjamin Herrenschmidt <address@hidden>
Signed-off-by: David Gibson <address@hidden>
Signed-off-by: Alexander Graf <address@hidden>
---
hw/spapr_hcall.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 73 insertions(+), 0 deletions(-)
diff --git a/hw/spapr_hcall.c b/hw/spapr_hcall.c
index 70f853c..0c61c10 100644
--- a/hw/spapr_hcall.c
+++ b/hw/spapr_hcall.c
@@ -463,6 +463,67 @@ static target_ulong h_rtas(CPUState *env, sPAPREnvironment
*spapr,
nret, rtas_r3 + 12 + 4*nargs);
}
+static target_ulong h_logical_load(CPUState *env, sPAPREnvironment *spapr,
+ target_ulong opcode, target_ulong *args)
+{
+ target_ulong size = args[0];
+ target_ulong addr = args[1];
+
+ switch (size) {
+ case 1:
+ args[0] = ldub_phys(addr);
+ return H_SUCCESS;
+ case 2:
+ args[0] = lduw_phys(addr);
+ return H_SUCCESS;
+ case 4:
+ args[0] = ldl_phys(addr);
+ return H_SUCCESS;
+ case 8:
+ args[0] = ldq_phys(addr);
+ return H_SUCCESS;
+ }
+ return H_PARAMETER;
+}
+
+static target_ulong h_logical_store(CPUState *env, sPAPREnvironment *spapr,
+ target_ulong opcode, target_ulong *args)
+{
+ target_ulong size = args[0];
+ target_ulong addr = args[1];
+ target_ulong val = args[2];
+
+ switch (size) {
+ case 1:
+ stb_phys(addr, val);
+ return H_SUCCESS;
+ case 2:
+ stw_phys(addr, val);
+ return H_SUCCESS;
+ case 4:
+ stl_phys(addr, val);
+ return H_SUCCESS;
+ case 8:
+ stq_phys(addr, val);
+ return H_SUCCESS;
+ }
+ return H_PARAMETER;
+}
+
+static target_ulong h_logical_icbi(CPUState *env, sPAPREnvironment *spapr,
+ target_ulong opcode, target_ulong *args)
+{
+ /* Nothing to do on emulation, KVM will trap this in the kernel */
+ return H_SUCCESS;
+}
+
+static target_ulong h_logical_dcbf(CPUState *env, sPAPREnvironment *spapr,
+ target_ulong opcode, target_ulong *args)
+{
+ /* Nothing to do on emulation, KVM will trap this in the kernel */
+ return H_SUCCESS;
+}
+
static spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1];
static spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX -
KVMPPC_HCALL_BASE + 1];
@@ -527,6 +588,18 @@ static void hypercall_init(void)
spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa);
spapr_register_hypercall(H_CEDE, h_cede);
+ /* "debugger" hcalls (also used by SLOF). Note: We do -not- differenciate
+ * here between the "CI" and the "CACHE" variants, they will use whatever
+ * mapping attributes qemu is using. When using KVM, the kernel will
+ * enforce the attributes more strongly
+ */
+ spapr_register_hypercall(H_LOGICAL_CI_LOAD, h_logical_load);
+ spapr_register_hypercall(H_LOGICAL_CI_STORE, h_logical_store);
+ spapr_register_hypercall(H_LOGICAL_CACHE_LOAD, h_logical_load);
+ spapr_register_hypercall(H_LOGICAL_CACHE_STORE, h_logical_store);
+ spapr_register_hypercall(H_LOGICAL_ICBI, h_logical_icbi);
+ spapr_register_hypercall(H_LOGICAL_DCBF, h_logical_dcbf);
+
/* qemu/KVM-PPC specific hcalls */
spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas);
}
--
1.6.0.2
- [Qemu-ppc] [PATCH 57/64] KVM: Update kernel headers, (continued)
- [Qemu-ppc] [PATCH 57/64] KVM: Update kernel headers, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 47/64] Implement POWER7's CFAR in TCG, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 49/64] vscsi: send the CHECK_CONDITION status down together with autosense data, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 04/64] PPC: Move openpic to target specific code compilation, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 40/64] PPC: Fix sync instructions problem in SMP, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 55/64] PPC: Fix via-cuda memory registration, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 06/64] PPC: Extend MPIC MMIO range, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 50/64] Gdbstub: handle read of fpscr, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 54/64] ppc: move ADB stuff from ppc_mac.h to adb.h, Alexander Graf, 2011/10/06
- [Qemu-ppc] [PATCH 41/64] pseries: Add real mode debugging hcalls,
Alexander Graf <=
- [Qemu-ppc] [PATCH 27/64] device tree: dont fail operations, Alexander Graf, 2011/10/06
- Re: [Qemu-ppc] [PULL 00/64] ppc patch queue 2011-10-06, Blue Swirl, 2011/10/08