Re: [Xen-devel] [PATCH v2 04/17] libxl/arm: prepare for constructing ACPI tables

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Thu, 23 Jun 2016, Shannon Zhao wrote:
> From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
> 
> It only constructs the ACPI tables for 64-bit ARM DomU when user enables
> acpi because 32-bit DomU doesn't support ACPI.
> 
> Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
> ---
>  tools/libxl/Makefile         |  4 +++
>  tools/libxl/libxl_arm.c      | 19 +++++++++-
>  tools/libxl/libxl_arm_acpi.c | 85 
> ++++++++++++++++++++++++++++++++++++++++++++
>  tools/libxl/libxl_arm_acpi.h | 32 +++++++++++++++++
>  4 files changed, 139 insertions(+), 1 deletion(-)
>  create mode 100644 tools/libxl/libxl_arm_acpi.c
>  create mode 100644 tools/libxl/libxl_arm_acpi.h
> 
> diff --git a/tools/libxl/Makefile b/tools/libxl/Makefile
> index 9fee752..264b6ef 100644
> --- a/tools/libxl/Makefile
> +++ b/tools/libxl/Makefile
> @@ -77,6 +77,10 @@ endif
>  
>  LIBXL_OBJS-$(CONFIG_X86) += libxl_cpuid.o libxl_x86.o libxl_psr.o
>  LIBXL_OBJS-$(CONFIG_ARM) += libxl_nocpuid.o libxl_arm.o libxl_libfdt_compat.o
> +LIBXL_OBJS-$(CONFIG_ARM) += libxl_arm_acpi.o
> +
> +libxl_arm_acpi.o: libxl_arm_acpi.c
> +     $(CC) -c $(CFLAGS) -I../../xen/include/ -o $@ libxl_arm_acpi.c
>  
>  ifeq ($(CONFIG_NetBSD),y)
>  LIBXL_OBJS-y += libxl_netbsd.o
> diff --git a/tools/libxl/libxl_arm.c b/tools/libxl/libxl_arm.c
> index cc5a717..f5db74b 100644
> --- a/tools/libxl/libxl_arm.c
> +++ b/tools/libxl/libxl_arm.c
> @@ -1,6 +1,7 @@
>  #include "libxl_internal.h"
>  #include "libxl_arch.h"
>  #include "libxl_libfdt_compat.h"
> +#include "libxl_arm_acpi.h"
>  
>  #include <xc_dom.h>
>  #include <stdbool.h>
> @@ -888,8 +889,24 @@ int libxl__arch_domain_init_hw_description(libxl__gc *gc,
>                                             libxl__domain_build_state *state,
>                                             struct xc_dom_image *dom)
>  {
> +    int rc;
> +
>      assert(info->type == LIBXL_DOMAIN_TYPE_PV);
> -    return libxl__prepare_dtb(gc, info, state, dom);
> +    rc = libxl__prepare_dtb(gc, info, state, dom);
> +    if (rc)
> +        return rc;
> +
> +    if (!state->config.acpi) {
> +        LOG(DEBUG, "Generating ACPI tables is disabled by user.");
> +        return 0;
> +    }
> +
> +    if (strcmp(dom->guest_type, "xen-3.0-aarch64")) {
> +        LOG(DEBUG, "Do not generate ACPI tables for %s", dom->guest_type);
> +        state->config.acpi = false;

Shouldn't we return here?


> +    }
> +
> +    return libxl__prepare_acpi(gc, info, state, dom);
>  }
>  
>  static void finalise_one_memory_node(libxl__gc *gc, void *fdt,
> diff --git a/tools/libxl/libxl_arm_acpi.c b/tools/libxl/libxl_arm_acpi.c
> new file mode 100644
> index 0000000..60c31f9
> --- /dev/null
> +++ b/tools/libxl/libxl_arm_acpi.c
> @@ -0,0 +1,85 @@
> +/*
> + * ARM DmoU ACPI generation
> + *
> + * Copyright (C) 2008-2010  Kevin O'Connor <kevin@xxxxxxxxxxxx>
> + * Copyright (C) 2006 Fabrice Bellard
> + * Copyright (C) 2013 Red Hat Inc
> + *
> + * Author: Michael S. Tsirkin <mst@xxxxxxxxxx>
> + *
> + * Copyright (c) 2015 HUAWEI TECHNOLOGIES CO.,LTD.
> + *
> + * Author: Shannon Zhao <zhaoshenglong@xxxxxxxxxx>
> + *
> + * Copyright (C) 2016      Linaro Ltd.
> + *
> + * Author: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

Uhm... If in doubt just remove all the Author lines: git log provides
more than enough information about who wrote this code.


> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU Lesser General Public License as published
> + * by the Free Software Foundation; version 2.1 only. with the special
> + * exception on linking described in file LICENSE.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU Lesser General Public License for more details.
> + */
> +
> +#include "libxl_arm_acpi.h"
> +
> +#include <stdint.h>
> +typedef uint8_t u8;
> +typedef uint16_t u16;
> +typedef uint32_t u32;
> +typedef uint64_t u64;
> +#include <acpi/acconfig.h>
> +#include <acpi/actbl.h>
> +
> +enum {
> +    RSDP,
> +    XSDT,
> +    GTDT,
> +    MADT,
> +    FADT,
> +    DSDT,
> +    NUMS,
> +};
> +
> +struct acpitable {
> +    void *table;
> +    size_t size;
> +};
> +
> +static struct acpitable acpitables[NUMS];
> +
> +int libxl__prepare_acpi(libxl__gc *gc, libxl_domain_build_info *info,
> +                        libxl__domain_build_state *state,
> +                        struct xc_dom_image *dom)
> +{
> +    const libxl_version_info *vers;
> +    int rc;
> +
> +    /* convenience aliases */
> +    xc_domain_configuration_t *xc_config = &state->config;
> +
> +    vers = libxl_get_version_info(CTX);
> +    if (vers == NULL)
> +        return ERROR_FAIL;
> +
> +    LOG(DEBUG, "constructing ACPI tables for Xen version %d.%d guest",
> +        vers->xen_version_major, vers->xen_version_minor);
> +
> +    dom->acpitable_blob = NULL;
> +    dom->acpitable_size = 0;
> +
> +    return 0;
> +}
> +
> +/*
> + * Local variables:
> + * mode: C
> + * c-basic-offset: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> diff --git a/tools/libxl/libxl_arm_acpi.h b/tools/libxl/libxl_arm_acpi.h
> new file mode 100644
> index 0000000..5899210
> --- /dev/null
> +++ b/tools/libxl/libxl_arm_acpi.h
> @@ -0,0 +1,32 @@
> +/*
> + * Copyright (C) 2016      Linaro Ltd.
> + *
> + * Author: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU Lesser General Public License as published
> + * by the Free Software Foundation; version 2.1 only. with the special
> + * exception on linking described in file LICENSE.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU Lesser General Public License for more details.
> + */
> +
> +#include "libxl_internal.h"
> +#include "libxl_arch.h"
> +
> +#include <xc_dom.h>
> +
> +int libxl__prepare_acpi(libxl__gc *gc, libxl_domain_build_info *info,
> +                        libxl__domain_build_state *state,
> +                        struct xc_dom_image *dom);
> +
> +/*
> + * Local variables:
> + * mode: C
> + * c-basic-offset: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> -- 
> 2.0.4
> 
> 

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