From: Daniel Henrique Barboza <danielhb413@gmail.com>
To: qemu-devel@nongnu.org
Cc: "Daniel Henrique Barboza" <danielhb413@gmail.com>,
"David Gibson" <david@gibson.dropbear.id.au>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: [PATCH v8 13/16] hw/ppc: set machine->fdt in spapr machine
Date: Mon, 26 Sep 2022 14:38:52 -0300 [thread overview]
Message-ID: <20220926173855.1159396-14-danielhb413@gmail.com> (raw)
In-Reply-To: <20220926173855.1159396-1-danielhb413@gmail.com>
The pSeries machine never bothered with the common machine->fdt
attribute. We do all the FDT related work using spapr->fdt_blob.
We're going to introduce a QMP/HMP command to dump the FDT, which will
rely on setting machine->fdt properly to work across all machine
archs/types.
Let's set machine->fdt in two places where we manipulate the FDT:
spapr_machine_reset() and CAS. There are other places where the FDT is
manipulated in the pSeries machines, most notably the hotplug/unplug
path. For now we'll acknowledge that we won't have the most accurate
representation of the FDT, depending on the current machine state, when
using this QMP/HMP fdt command. Making the internal FDT representation
always match the actual FDT representation that the guest is using is a
problem for another day.
spapr->fdt_blob is left untouched for now. To replace it with
machine->fdt, since we're migrating spapr->fdt_blob, we would need to
migrate machine->fdt as well. This is something that we would like to to
do keep our code simpler but it's also a work we'll leave for later.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
hw/ppc/spapr.c | 3 +++
hw/ppc/spapr_hcall.c | 8 ++++++++
2 files changed, 11 insertions(+)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index cc1adc23fa..d988e59983 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1713,6 +1713,9 @@ static void spapr_machine_reset(MachineState *machine)
spapr->fdt_initial_size = spapr->fdt_size;
spapr->fdt_blob = fdt;
+ /* Set machine->fdt for 'dumpdtb' QMP/HMP command */
+ machine->fdt = fdt;
+
/* Set up the entry state */
first_ppc_cpu->env.gpr[5] = 0;
diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index a8d4a6bcf0..891206e893 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -1256,6 +1256,14 @@ target_ulong do_client_architecture_support(PowerPCCPU *cpu,
spapr->fdt_initial_size = spapr->fdt_size;
spapr->fdt_blob = fdt;
+ /*
+ * Set the machine->fdt pointer again since we just freed
+ * it above (by freeing spapr->fdt_blob). We set this
+ * pointer to enable support for the 'dumpdtb' QMP/HMP
+ * command.
+ */
+ MACHINE(spapr)->fdt = fdt;
+
return H_SUCCESS;
}
--
2.37.3
next prev parent reply other threads:[~2022-09-26 18:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-26 17:38 [PATCH v8 00/16] QMP/HMP: introduce 'dumpdtb' Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 01/16] qmp/hmp, device_tree.c: introduce dumpdtb Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 02/16] hw/core: free ms->fdt in machine_finalize() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 03/16] hw/arm: do not free machine->fdt in arm_load_dtb() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 04/16] hw/mips: set machine->fdt in boston_mach_init() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 05/16] hw/microblaze: set machine->fdt in microblaze_load_dtb() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 06/16] hw/nios2: set machine->fdt in nios2_load_dtb() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 07/16] hw/ppc: set machine->fdt in ppce500_load_device_tree() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 08/16] hw/ppc: set machine->fdt in bamboo_load_device_tree() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 09/16] hw/ppc: set machine->fdt in sam460ex_load_device_tree() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 10/16] hw/ppc: set machine->fdt in xilinx_load_device_tree() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 11/16] hw/ppc: set machine->fdt in pegasos2_machine_reset() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 12/16] hw/ppc: set machine->fdt in pnv_reset() Daniel Henrique Barboza
2022-09-26 17:38 ` Daniel Henrique Barboza [this message]
2022-09-26 17:38 ` [PATCH v8 14/16] hw/riscv: set machine->fdt in sifive_u_machine_init() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 15/16] hw/riscv: set machine->fdt in spike_board_init() Daniel Henrique Barboza
2022-09-26 17:38 ` [PATCH v8 16/16] hw/xtensa: set machine->fdt in xtfpga_init() Daniel Henrique Barboza
2022-10-08 10:52 ` [PATCH v8 00/16] QMP/HMP: introduce 'dumpdtb' Daniel Henrique Barboza
2022-10-15 12:06 ` Daniel Henrique Barboza
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220926173855.1159396-14-danielhb413@gmail.com \
--to=danielhb413@gmail.com \
--cc=david@gibson.dropbear.id.au \
--cc=f4bug@amsat.org \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).