The first 2 patches in this series clean up some things I noticed while
coding.

Patch 3 adds support for the new Platform Capabilities Structure, which
was added to the NFIT in ACPI 6.2 Errata A.  We add a machine command
line option "nvdimm-cap":

    -machine pc,accel=kvm,nvdimm,nvdimm-cap=2

which allows the user to pass in a value for this structure.  When such
a value is passed in we will generate the new NFIT subtable.

Patch 4 adds code to the "make check" self test infrastructure so that
we generate the new Platform Capabilities Structure, and adds it to the
expected NFIT output so that we test for it.

Thanks to Igor Mammedov for his feedback on v1 of this set.

Ross Zwisler (4):
  nvdimm: fix typo in label-size definition
  tests/.gitignore: add entry for generated file
  nvdimm, acpi: support NFIT platform capabilities
  ACPI testing: test NFIT platform capabilities

 docs/nvdimm.txt                       |  18 ++++++++++++++
 hw/acpi/nvdimm.c                      |  44 ++++++++++++++++++++++++++++++----
 hw/i386/pc.c                          |  31 ++++++++++++++++++++++++
 hw/mem/nvdimm.c                       |   2 +-
 include/hw/i386/pc.h                  |   1 +
 include/hw/mem/nvdimm.h               |   7 +++++-
 tests/.gitignore                      |   1 +
 tests/acpi-test-data/pc/NFIT.dimmpxm  | Bin 224 -> 240 bytes
 tests/acpi-test-data/q35/NFIT.dimmpxm | Bin 224 -> 240 bytes
 tests/bios-tables-test.c              |   2 +-
 10 files changed, 99 insertions(+), 7 deletions(-)

-- 
2.14.3

Hi,

This series seems to have some coding style problems. See output below for
more information:

Type: series
Message-id: 20180517050024.20101-1-ross.zwisler@linux.intel.com
Subject: [Qemu-devel] [qemu PATCH v2 0/4] support NFIT platform capabilities

=== TEST SCRIPT BEGIN ===
#!/bin/bash

BASE=base
n=1
total=$(git log --oneline $BASE.. | wc -l)
failed=0

git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram

commits="$(git log --format=%H --reverse $BASE..)"
for c in $commits; do
    echo "Checking PATCH $n/$total: $(git log -n 1 --format=%s $c)..."
    if ! git show $c --format=email | ./scripts/checkpatch.pl --mailback -; then
        failed=1
        echo
    fi
    n=$((n+1))
done

exit $failed
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
 t [tag update]            patchew/1526517763-11108-1-git-send-email-wangjie88@huawei.com -> patchew/1526517763-11108-1-git-send-email-wangjie88@huawei.com
 * [new tag]               patchew/20180517050024.20101-1-ross.zwisler@linux.intel.com -> patchew/20180517050024.20101-1-ross.zwisler@linux.intel.com
Switched to a new branch 'test'
3a8b0e98fa ACPI testing: test NFIT platform capabilities
5732e8be9b nvdimm, acpi: support NFIT platform capabilities
3808b5f1bc tests/.gitignore: add entry for generated file
fa07ae77c6 nvdimm: fix typo in label-size definition

=== OUTPUT BEGIN ===
Checking PATCH 1/4: nvdimm: fix typo in label-size definition...
Checking PATCH 2/4: tests/.gitignore: add entry for generated file...
Checking PATCH 3/4: nvdimm, acpi: support NFIT platform capabilities...
ERROR: braces {} are necessary for all arms of this statement
#94: FILE: hw/acpi/nvdimm.c:407:
+    if (state->capabilities)
[...]

total: 1 errors, 0 warnings, 157 lines checked

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

Checking PATCH 4/4: ACPI testing: test NFIT platform capabilities...
=== OUTPUT END ===

Test command exited with code: 1


---
Email generated automatically by Patchew [http://patchew.org/].
Please send your feedback to patchew-devel@redhat.com

Add a machine command line option to allow the user to control the Platform
Capabilities Structure in the virtualized NFIT.  This Platform Capabilities
Structure was added in ACPI 6.2 Errata A.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
---

v3: Added brackets around single statement "if" conditional to comply
    with qemu coding style.

---
 docs/nvdimm.txt         | 18 ++++++++++++++++++
 hw/acpi/nvdimm.c        | 45 +++++++++++++++++++++++++++++++++++++++++----
 hw/i386/pc.c            | 31 +++++++++++++++++++++++++++++++
 include/hw/i386/pc.h    |  1 +
 include/hw/mem/nvdimm.h |  5 +++++
 5 files changed, 96 insertions(+), 4 deletions(-)

diff --git a/docs/nvdimm.txt b/docs/nvdimm.txt
index e903d8bb09..3f18013880 100644
--- a/docs/nvdimm.txt
+++ b/docs/nvdimm.txt
@@ -153,3 +153,21 @@ guest NVDIMM region mapping structure.  This unarmed flag indicates
 guest software that this vNVDIMM device contains a region that cannot
 accept persistent writes. In result, for example, the guest Linux
 NVDIMM driver, marks such vNVDIMM device as read-only.
+
+Platform Capabilities
+---------------------
+
+ACPI 6.2 Errata A added support for a new Platform Capabilities Structure
+which allows the platform to communicate what features it supports related to
+NVDIMM data durability.  Users can provide a capabilities value to a guest via
+the optional "nvdimm-cap" machine command line option:
+
+    -machine pc,accel=kvm,nvdimm,nvdimm-cap=2
+
+As of ACPI 6.2 Errata A, the following values are valid for the bottom two
+bits:
+
+2 - Memory Controller Flush to NVDIMM Durability on Power Loss Capable.
+3 - CPU Cache Flush to NVDIMM Durability on Power Loss Capable.
+
+For a complete list of the flags available please consult the ACPI spec.
diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
index 59d6e4254c..946937f3ca 100644
--- a/hw/acpi/nvdimm.c
+++ b/hw/acpi/nvdimm.c
@@ -169,6 +169,21 @@ struct NvdimmNfitControlRegion {
 } QEMU_PACKED;
 typedef struct NvdimmNfitControlRegion NvdimmNfitControlRegion;
 
+/*
+ * NVDIMM Platform Capabilities Structure
+ *
+ * Defined in section 5.2.25.9 of ACPI 6.2 Errata A, September 2017
+ */
+struct NvdimmNfitPlatformCaps {
+    uint16_t type;
+    uint16_t length;
+    uint8_t highest_cap;
+    uint8_t reserved[3];
+    uint32_t capabilities;
+    uint8_t reserved2[4];
+} QEMU_PACKED;
+typedef struct NvdimmNfitPlatformCaps NvdimmNfitPlatformCaps;
+
 /*
  * Module serial number is a unique number for each device. We use the
  * slot id of NVDIMM device to generate this number so that each device
@@ -351,7 +366,23 @@ static void nvdimm_build_structure_dcr(GArray *structures, DeviceState *dev)
                                          JEDEC Annex L Release 3. */);
 }
 
-static GArray *nvdimm_build_device_structure(void)
+/*
+ * ACPI 6.2 Errata A: 5.2.25.9 NVDIMM Platform Capabilities Structure
+ */
+static void
+nvdimm_build_structure_caps(GArray *structures, uint32_t capabilities)
+{
+    NvdimmNfitPlatformCaps *nfit_caps;
+
+    nfit_caps = acpi_data_push(structures, sizeof(*nfit_caps));
+
+    nfit_caps->type = cpu_to_le16(7 /* NVDIMM Platform Capabilities */);
+    nfit_caps->length = cpu_to_le16(sizeof(*nfit_caps));
+    nfit_caps->highest_cap = 2;
+    nfit_caps->capabilities = cpu_to_le32(capabilities);
+}
+
+static GArray *nvdimm_build_device_structure(AcpiNVDIMMState *state)
 {
     GSList *device_list = nvdimm_get_device_list();
     GArray *structures = g_array_new(false, true /* clear */, 1);
@@ -373,6 +404,10 @@ static GArray *nvdimm_build_device_structure(void)
     }
     g_slist_free(device_list);
 
+    if (state->capabilities) {
+        nvdimm_build_structure_caps(structures, state->capabilities);
+    }
+
     return structures;
 }
 
@@ -381,16 +416,18 @@ static void nvdimm_init_fit_buffer(NvdimmFitBuffer *fit_buf)
     fit_buf->fit = g_array_new(false, true /* clear */, 1);
 }
 
-static void nvdimm_build_fit_buffer(NvdimmFitBuffer *fit_buf)
+static void nvdimm_build_fit_buffer(AcpiNVDIMMState *state)
 {
+    NvdimmFitBuffer *fit_buf = &state->fit_buf;
+
     g_array_free(fit_buf->fit, true);
-    fit_buf->fit = nvdimm_build_device_structure();
+    fit_buf->fit = nvdimm_build_device_structure(state);
     fit_buf->dirty = true;
 }
 
 void nvdimm_plug(AcpiNVDIMMState *state)
 {
-    nvdimm_build_fit_buffer(&state->fit_buf);
+    nvdimm_build_fit_buffer(state);
 }
 
 static void nvdimm_build_nfit(AcpiNVDIMMState *state, GArray *table_offsets,
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index d768930d02..1b2684c549 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -2182,6 +2182,33 @@ static void pc_machine_set_nvdimm(Object *obj, bool value, Error **errp)
     pcms->acpi_nvdimm_state.is_enabled = value;
 }
 
+static void pc_machine_get_nvdimm_capabilities(Object *obj, Visitor *v,
+                                               const char *name, void *opaque,
+                                               Error **errp)
+{
+    PCMachineState *pcms = PC_MACHINE(obj);
+    uint32_t value = pcms->acpi_nvdimm_state.capabilities;
+
+    visit_type_uint32(v, name, &value, errp);
+}
+
+static void pc_machine_set_nvdimm_capabilities(Object *obj, Visitor *v,
+                                               const char *name, void *opaque,
+                                               Error **errp)
+{
+    PCMachineState *pcms = PC_MACHINE(obj);
+    Error *error = NULL;
+    uint32_t value;
+
+    visit_type_uint32(v, name, &value, &error);
+    if (error) {
+        error_propagate(errp, error);
+        return;
+    }
+
+    pcms->acpi_nvdimm_state.capabilities = value;
+}
+
 static bool pc_machine_get_smbus(Object *obj, Error **errp)
 {
     PCMachineState *pcms = PC_MACHINE(obj);
@@ -2395,6 +2422,10 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     object_class_property_add_bool(oc, PC_MACHINE_NVDIMM,
         pc_machine_get_nvdimm, pc_machine_set_nvdimm, &error_abort);
 
+    object_class_property_add(oc, PC_MACHINE_NVDIMM_CAP, "uint32",
+        pc_machine_get_nvdimm_capabilities,
+        pc_machine_set_nvdimm_capabilities, NULL, NULL, &error_abort);
+
     object_class_property_add_bool(oc, PC_MACHINE_SMBUS,
         pc_machine_get_smbus, pc_machine_set_smbus, &error_abort);
 
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 2a98e3ad68..e9b22f929c 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -76,6 +76,7 @@ struct PCMachineState {
 #define PC_MACHINE_VMPORT           "vmport"
 #define PC_MACHINE_SMM              "smm"
 #define PC_MACHINE_NVDIMM           "nvdimm"
+#define PC_MACHINE_NVDIMM_CAP       "nvdimm-cap"
 #define PC_MACHINE_SMBUS            "smbus"
 #define PC_MACHINE_SATA             "sata"
 #define PC_MACHINE_PIT              "pit"
diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h
index 74c60332e1..3c82751bab 100644
--- a/include/hw/mem/nvdimm.h
+++ b/include/hw/mem/nvdimm.h
@@ -134,6 +134,11 @@ struct AcpiNVDIMMState {
 
     /* the IO region used by OSPM to transfer control to QEMU. */
     MemoryRegion io_mr;
+
+    /*
+     * Platform capabilities, section 5.2.25.9 of ACPI 6.2 Errata A
+     */
+    int32_t capabilities;
 };
 typedef struct AcpiNVDIMMState AcpiNVDIMMState;
 
-- 
2.14.3