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[Qemu-devel] [RFC QEMU PATCH v2 02/10] xen-hvm: initialize DM ACPI
From: |
Haozhong Zhang |
Subject: |
[Qemu-devel] [RFC QEMU PATCH v2 02/10] xen-hvm: initialize DM ACPI |
Date: |
Mon, 20 Mar 2017 08:12:41 +0800 |
Probe the base address and the length of guest ACPI buffer reserved
for copying ACPI from QEMU.
Signed-off-by: Haozhong Zhang <address@hidden>
---
Cc: Stefano Stabellini <address@hidden>
Cc: Anthony Perard <address@hidden>
Cc: address@hidden
---
xen-hvm.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
diff --git a/xen-hvm.c b/xen-hvm.c
index 5043beb98f..c42c958a0a 100644
--- a/xen-hvm.c
+++ b/xen-hvm.c
@@ -19,6 +19,7 @@
#include "qmp-commands.h"
#include "sysemu/char.h"
+#include "qemu/cutils.h"
#include "qemu/error-report.h"
#include "qemu/range.h"
#include "sysemu/xen-mapcache.h"
@@ -87,6 +88,18 @@ typedef struct XenPhysmap {
QLIST_ENTRY(XenPhysmap) list;
} XenPhysmap;
+#define HVM_XS_DM_ACPI_ROOT "/hvmloader/dm-acpi"
+#define HVM_XS_DM_ACPI_ADDRESS HVM_XS_DM_ACPI_ROOT"/address"
+#define HVM_XS_DM_ACPI_LENGTH HVM_XS_DM_ACPI_ROOT"/length"
+
+typedef struct XenAcpiBuf {
+ ram_addr_t base;
+ ram_addr_t length;
+ ram_addr_t used;
+} XenAcpiBuf;
+
+static XenAcpiBuf *dm_acpi_buf;
+
typedef struct XenIOState {
ioservid_t ioservid;
shared_iopage_t *shared_page;
@@ -111,6 +124,8 @@ typedef struct XenIOState {
hwaddr free_phys_offset;
const XenPhysmap *log_for_dirtybit;
+ XenAcpiBuf dm_acpi_buf;
+
Notifier exit;
Notifier suspend;
Notifier wakeup;
@@ -1205,6 +1220,52 @@ static void xen_wakeup_notifier(Notifier *notifier, void
*data)
xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 0);
}
+static int dm_acpi_buf_init(XenIOState *state)
+{
+ char path[80], *value;
+ unsigned int len;
+
+ dm_acpi_buf = &state->dm_acpi_buf;
+
+ snprintf(path, sizeof(path),
+ "/local/domain/%d"HVM_XS_DM_ACPI_ADDRESS, xen_domid);
+ value = xs_read(state->xenstore, 0, path, &len);
+ if (!value) {
+ return -EINVAL;
+ }
+ if (qemu_strtoul(value, NULL, 16, &dm_acpi_buf->base)) {
+ return -EINVAL;
+ }
+
+ snprintf(path, sizeof(path),
+ "/local/domain/%d"HVM_XS_DM_ACPI_LENGTH, xen_domid);
+ value = xs_read(state->xenstore, 0, path, &len);
+ if (!value) {
+ return -EINVAL;
+ }
+ if (qemu_strtoul(value, NULL, 16, &dm_acpi_buf->length)) {
+ return -EINVAL;
+ }
+
+ dm_acpi_buf->used = 0;
+
+ return 0;
+}
+
+static int xen_dm_acpi_required(PCMachineState *pcms)
+{
+ return 0;
+}
+
+static int xen_dm_acpi_init(PCMachineState *pcms, XenIOState *state)
+{
+ if (!xen_dm_acpi_required(pcms)) {
+ return 0;
+ }
+
+ return dm_acpi_buf_init(state);
+}
+
void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory)
{
int i, rc;
@@ -1344,6 +1405,11 @@ void xen_hvm_init(PCMachineState *pcms, MemoryRegion
**ram_memory)
/* Disable ACPI build because Xen handles it */
pcms->acpi_build_enabled = false;
+ if (xen_dm_acpi_init(pcms, state)) {
+ error_report("failed to initialize xen ACPI");
+ goto err;
+ }
+
return;
err:
--
2.12.0
- [Qemu-devel] [RFC QEMU PATCH v2 00/10] Implement vNVDIMM for Xen HVM guest, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 02/10] xen-hvm: initialize DM ACPI,
Haozhong Zhang <=
- [Qemu-devel] [RFC QEMU PATCH v2 01/10] nvdimm xen: disable label support on Xen, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 03/10] xen-hvm: support copying ACPI to guest memory, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 04/10] nvdimm acpi: do not use fw_cfg on Xen, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 05/10] nvdimm acpi: copy NFIT to Xen guest, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 06/10] nvdimm acpi: build and copy NVDIMM namespace devices to guest on Xen, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 07/10] xen-hvm: initiate building DM ACPI on i386 machine, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 08/10] hostmem: add a host memory backend for Xen, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 09/10] xen-hvm: create hotplug memory region on Xen, Haozhong Zhang, 2017/03/19
- [Qemu-devel] [RFC QEMU PATCH v2 10/10] qapi: extend 'query-memory-devices' to list devices of specified type, Haozhong Zhang, 2017/03/19
- Re: [Qemu-devel] [RFC QEMU PATCH v2 00/10] Implement vNVDIMM for Xen HVM guest, no-reply, 2017/03/19