[xen master] hvmloader, libxl: use the correct ACPI settings depending on device model

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[xen master] hvmloader, libxl: use the correct ACPI settings depending on device model

patchbot
commit 9e50d8adc9454ccbcd7b3b31e8f1abcc8a976b67
Author:     Igor Druzhinin <[hidden email]>
AuthorDate: Fri Sep 1 11:03:20 2017 +0200
Commit:     Jan Beulich <[hidden email]>
CommitDate: Fri Sep 1 11:03:20 2017 +0200

    hvmloader, libxl: use the correct ACPI settings depending on device model
   
    We need to choose ACPI tables properly depending on the device
    model version we are running. Previously, this decision was
    made by BIOS type specific code in hvmloader, e.g. always load
    QEMU traditional specific tables if it's ROMBIOS and always
    load QEMU Xen specific tables if it's SeaBIOS.
   
    This change saves this behavior (for compatibility) but adds
    an additional way (xenstore key) to specify the correct
    device model if we happen to run a non-default one. Toolstack
    bit makes use of it.
   
    The enforcement of BIOS type depending on QEMU version will
    be lifted later when the rest of ROMBIOS compatibility fixes
    are in place.
   
    Signed-off-by: Igor Druzhinin <[hidden email]>
    Reviewed-by: Paul Durrant <[hidden email]>
    Acked-by: Wei Liu <[hidden email]>
    Reviewed-by: Roger Pau Monné <[hidden email]>
    Acked-by: Jan Beulich <[hidden email]>
---
 tools/firmware/hvmloader/ovmf.c    |  3 ---
 tools/firmware/hvmloader/rombios.c |  3 ---
 tools/firmware/hvmloader/seabios.c |  3 ---
 tools/firmware/hvmloader/util.c    | 17 +++++++++++++++++
 tools/firmware/hvmloader/util.h    |  3 +++
 tools/libxl/libxl_create.c         |  4 +++-
 xen/include/public/hvm/ioreq.h     |  9 +++++++--
 7 files changed, 30 insertions(+), 12 deletions(-)

diff --git a/tools/firmware/hvmloader/ovmf.c b/tools/firmware/hvmloader/ovmf.c
index 4ff7f1d..a17a11c 100644
--- a/tools/firmware/hvmloader/ovmf.c
+++ b/tools/firmware/hvmloader/ovmf.c
@@ -41,9 +41,6 @@
 #define LOWCHUNK_MAXOFFSET      0x0000FFFF
 #define OVMF_INFO_PHYSICAL_ADDRESS 0x00001000
 
-extern unsigned char dsdt_anycpu_qemu_xen[];
-extern int dsdt_anycpu_qemu_xen_len;
-
 #define OVMF_INFO_MAX_TABLES 4
 struct ovmf_info {
     char signature[14]; /* XenHVMOVMF\0\0\0\0 */
diff --git a/tools/firmware/hvmloader/rombios.c b/tools/firmware/hvmloader/rombios.c
index 56b39b7..c736fd9 100644
--- a/tools/firmware/hvmloader/rombios.c
+++ b/tools/firmware/hvmloader/rombios.c
@@ -42,9 +42,6 @@
 #define ROMBIOS_MAXOFFSET      0x0000FFFF
 #define ROMBIOS_END            (ROMBIOS_BEGIN + ROMBIOS_SIZE)
 
-extern unsigned char dsdt_anycpu[], dsdt_15cpu[];
-extern int dsdt_anycpu_len, dsdt_15cpu_len;
-
 static void rombios_setup_e820(void)
 {
     /*
diff --git a/tools/firmware/hvmloader/seabios.c b/tools/firmware/hvmloader/seabios.c
index 870576a..801516d 100644
--- a/tools/firmware/hvmloader/seabios.c
+++ b/tools/firmware/hvmloader/seabios.c
@@ -29,9 +29,6 @@
 #include <acpi2_0.h>
 #include <libacpi.h>
 
-extern unsigned char dsdt_anycpu_qemu_xen[];
-extern int dsdt_anycpu_qemu_xen_len;
-
 struct seabios_info {
     char signature[14]; /* XenHVMSeaBIOS\0 */
     uint8_t length;     /* Length of this struct */
diff --git a/tools/firmware/hvmloader/util.c b/tools/firmware/hvmloader/util.c
index db5f240..ab5448b 100644
--- a/tools/firmware/hvmloader/util.c
+++ b/tools/firmware/hvmloader/util.c
@@ -897,6 +897,23 @@ void hvmloader_acpi_build_tables(struct acpi_config *config,
     /* Allocate and initialise the acpi info area. */
     mem_hole_populate_ram(ACPI_INFO_PHYSICAL_ADDRESS >> PAGE_SHIFT, 1);
 
+    /* If the device model is specified switch to the corresponding tables */
+    s = xenstore_read("platform/device-model", "");
+    if ( !strncmp(s, "qemu_xen_traditional", 21) )
+    {
+        config->dsdt_anycpu = dsdt_anycpu;
+        config->dsdt_anycpu_len = dsdt_anycpu_len;
+        config->dsdt_15cpu = dsdt_15cpu;
+        config->dsdt_15cpu_len = dsdt_15cpu_len;
+    }
+    else if ( !strncmp(s, "qemu_xen", 9) )
+    {
+        config->dsdt_anycpu = dsdt_anycpu_qemu_xen;
+        config->dsdt_anycpu_len = dsdt_anycpu_qemu_xen_len;
+        config->dsdt_15cpu = NULL;
+        config->dsdt_15cpu_len = 0;
+    }
+
     config->lapic_base_address = LAPIC_BASE_ADDRESS;
     config->lapic_id = acpi_lapic_id;
     config->ioapic_base_address = ioapic_base_address;
diff --git a/tools/firmware/hvmloader/util.h b/tools/firmware/hvmloader/util.h
index 6062f0b..2ef854e 100644
--- a/tools/firmware/hvmloader/util.h
+++ b/tools/firmware/hvmloader/util.h
@@ -276,6 +276,9 @@ extern struct e820map memory_map;
 bool check_overlap(uint64_t start, uint64_t size,
                    uint64_t reserved_start, uint64_t reserved_size);
 
+extern const unsigned char dsdt_anycpu_qemu_xen[], dsdt_anycpu[], dsdt_15cpu[];
+extern const int dsdt_anycpu_qemu_xen_len, dsdt_anycpu_len, dsdt_15cpu_len;
+
 struct acpi_config;
 void hvmloader_acpi_build_tables(struct acpi_config *config,
                                  unsigned int physical);
diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 1158303..4f13b69 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -451,7 +451,7 @@ int libxl__domain_build(libxl__gc *gc,
         vments[4] = "start_time";
         vments[5] = GCSPRINTF("%lu.%02d", start_time.tv_sec,(int)start_time.tv_usec/10000);
 
-        localents = libxl__calloc(gc, 11, sizeof(char *));
+        localents = libxl__calloc(gc, 13, sizeof(char *));
         i = 0;
         localents[i++] = "platform/acpi";
         localents[i++] = libxl__acpi_defbool_val(info) ? "1" : "0";
@@ -472,6 +472,8 @@ int libxl__domain_build(libxl__gc *gc,
                                    info->u.hvm.mmio_hole_memkb << 10);
             }
         }
+        localents[i++] = "platform/device-model";
+        localents[i++] = (char *)libxl_device_model_version_to_string(info->device_model_version);
 
         break;
     case LIBXL_DOMAIN_TYPE_PV:
diff --git a/xen/include/public/hvm/ioreq.h b/xen/include/public/hvm/ioreq.h
index 2e5809b..d309d12 100644
--- a/xen/include/public/hvm/ioreq.h
+++ b/xen/include/public/hvm/ioreq.h
@@ -103,14 +103,19 @@ typedef struct buffered_iopage buffered_iopage_t;
  * version number in HVM_PARAM_ACPI_IOPORTS_LOCATION.
  */
 
-/* Version 0 (default): Traditional Xen locations. */
+/*
+ * Version 0 (default): Traditional (obsolete) Xen locations.
+ *
+ * These are now only used for compatibility with VMs migrated
+ * from older Xen versions.
+ */
 #define ACPI_PM1A_EVT_BLK_ADDRESS_V0 0x1f40
 #define ACPI_PM1A_CNT_BLK_ADDRESS_V0 (ACPI_PM1A_EVT_BLK_ADDRESS_V0 + 0x04)
 #define ACPI_PM_TMR_BLK_ADDRESS_V0   (ACPI_PM1A_EVT_BLK_ADDRESS_V0 + 0x08)
 #define ACPI_GPE0_BLK_ADDRESS_V0     (ACPI_PM_TMR_BLK_ADDRESS_V0 + 0x20)
 #define ACPI_GPE0_BLK_LEN_V0         0x08
 
-/* Version 1: Locations preferred by modern Qemu. */
+/* Version 1: Locations preferred by modern Qemu (including Qemu-trad). */
 #define ACPI_PM1A_EVT_BLK_ADDRESS_V1 0xb000
 #define ACPI_PM1A_CNT_BLK_ADDRESS_V1 (ACPI_PM1A_EVT_BLK_ADDRESS_V1 + 0x04)
 #define ACPI_PM_TMR_BLK_ADDRESS_V1   (ACPI_PM1A_EVT_BLK_ADDRESS_V1 + 0x08)
--
generated by git-patchbot for /home/xen/git/xen.git#master


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