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Message-ID: <alpine.DEB.2.02.1601251643230.9687@kaball.uk.xensource.com>
Date: Mon, 25 Jan 2016 16:44:09 +0000
From: Stefano Stabellini <stefano.stabellini@...citrix.com>
To: Shannon Zhao <zhaoshenglong@...wei.com>
CC: <linux-arm-kernel@...ts.infradead.org>,
<ard.biesheuvel@...aro.org>, <mark.rutland@....com>,
<stefano.stabellini@...rix.com>, <david.vrabel@...rix.com>,
<catalin.marinas@....com>, <will.deacon@....com>,
<julien.grall@...rix.com>, <xen-devel@...ts.xen.org>,
<devicetree@...r.kernel.org>, <linux-efi@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <ian.campbell@...rix.com>,
<shannon.zhao@...aro.org>, <peter.huangpeng@...wei.com>
Subject: Re: [PATCH v3 14/17] XEN: EFI: Move x86 specific codes to architecture
directory
On Sat, 23 Jan 2016, Shannon Zhao wrote:
> From: Shannon Zhao <shannon.zhao@...aro.org>
>
> Move x86 specific codes to architecture directory and export those EFI
> runtime service functions. This will be useful for initializing runtime
> service on ARM later.
>
> Signed-off-by: Shannon Zhao <shannon.zhao@...aro.org>
This patch causes a build breakage on x86:
arch/x86/xen/efi.c: In function ‘xen_efi_probe’:
arch/x86/xen/efi.c:101:2: error: implicit declaration of function ‘HYPERVISOR_platform_op’ [-Werror=implicit-function-declaration]
> arch/x86/xen/efi.c | 112 ++++++++++++++++++++++++++++++++
> drivers/xen/efi.c | 174 ++++++++++----------------------------------------
> include/xen/xen-ops.h | 30 ++++++---
> 3 files changed, 168 insertions(+), 148 deletions(-)
>
> diff --git a/arch/x86/xen/efi.c b/arch/x86/xen/efi.c
> index be14cc3..86527f1 100644
> --- a/arch/x86/xen/efi.c
> +++ b/arch/x86/xen/efi.c
> @@ -20,10 +20,122 @@
> #include <linux/init.h>
> #include <linux/string.h>
>
> +#include <xen/xen.h>
> #include <xen/xen-ops.h>
> +#include <xen/interface/platform.h>
>
> #include <asm/page.h>
> #include <asm/setup.h>
> +#include <asm/xen/hypercall.h>
> +
> +static efi_char16_t vendor[100] __initdata;
> +
> +static efi_system_table_t efi_systab_xen __initdata = {
> + .hdr = {
> + .signature = EFI_SYSTEM_TABLE_SIGNATURE,
> + .revision = 0, /* Initialized later. */
> + .headersize = 0, /* Ignored by Linux Kernel. */
> + .crc32 = 0, /* Ignored by Linux Kernel. */
> + .reserved = 0
> + },
> + .fw_vendor = EFI_INVALID_TABLE_ADDR, /* Initialized later. */
> + .fw_revision = 0, /* Initialized later. */
> + .con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> + .con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> + .con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> + .con_out = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> + .stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> + .stderr = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> + .runtime = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
> + /* Not used under Xen. */
> + .boottime = (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR,
> + /* Not used under Xen. */
> + .nr_tables = 0, /* Initialized later. */
> + .tables = EFI_INVALID_TABLE_ADDR /* Initialized later. */
> +};
> +
> +static const struct efi efi_xen __initconst = {
> + .systab = NULL, /* Initialized later. */
> + .runtime_version = 0, /* Initialized later. */
> + .mps = EFI_INVALID_TABLE_ADDR,
> + .acpi = EFI_INVALID_TABLE_ADDR,
> + .acpi20 = EFI_INVALID_TABLE_ADDR,
> + .smbios = EFI_INVALID_TABLE_ADDR,
> + .smbios3 = EFI_INVALID_TABLE_ADDR,
> + .sal_systab = EFI_INVALID_TABLE_ADDR,
> + .boot_info = EFI_INVALID_TABLE_ADDR,
> + .hcdp = EFI_INVALID_TABLE_ADDR,
> + .uga = EFI_INVALID_TABLE_ADDR,
> + .uv_systab = EFI_INVALID_TABLE_ADDR,
> + .fw_vendor = EFI_INVALID_TABLE_ADDR,
> + .runtime = EFI_INVALID_TABLE_ADDR,
> + .config_table = EFI_INVALID_TABLE_ADDR,
> + .get_time = xen_efi_get_time,
> + .set_time = xen_efi_set_time,
> + .get_wakeup_time = xen_efi_get_wakeup_time,
> + .set_wakeup_time = xen_efi_set_wakeup_time,
> + .get_variable = xen_efi_get_variable,
> + .get_next_variable = xen_efi_get_next_variable,
> + .set_variable = xen_efi_set_variable,
> + .query_variable_info = xen_efi_query_variable_info,
> + .update_capsule = xen_efi_update_capsule,
> + .query_capsule_caps = xen_efi_query_capsule_caps,
> + .get_next_high_mono_count = xen_efi_get_next_high_mono_count,
> + .reset_system = NULL, /* Functionality provided by Xen. */
> + .set_virtual_address_map = NULL, /* Not used under Xen. */
> + .memmap = NULL, /* Not used under Xen. */
> + .flags = 0 /* Initialized later. */
> +};
> +
> +static efi_system_table_t __init *xen_efi_probe(void)
> +{
> + struct xen_platform_op op = {
> + .cmd = XENPF_firmware_info,
> + .u.firmware_info = {
> + .type = XEN_FW_EFI_INFO,
> + .index = XEN_FW_EFI_CONFIG_TABLE
> + }
> + };
> + union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
> +
> + if (!xen_initial_domain() || HYPERVISOR_platform_op(&op) < 0)
> + return NULL;
> +
> + /* Here we know that Xen runs on EFI platform. */
> +
> + efi = efi_xen;
> +
> + efi_systab_xen.tables = info->cfg.addr;
> + efi_systab_xen.nr_tables = info->cfg.nent;
> +
> + op.cmd = XENPF_firmware_info;
> + op.u.firmware_info.type = XEN_FW_EFI_INFO;
> + op.u.firmware_info.index = XEN_FW_EFI_VENDOR;
> + info->vendor.bufsz = sizeof(vendor);
> + set_xen_guest_handle(info->vendor.name, vendor);
> +
> + if (HYPERVISOR_platform_op(&op) == 0) {
> + efi_systab_xen.fw_vendor = __pa_symbol(vendor);
> + efi_systab_xen.fw_revision = info->vendor.revision;
> + } else
> + efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN");
> +
> + op.cmd = XENPF_firmware_info;
> + op.u.firmware_info.type = XEN_FW_EFI_INFO;
> + op.u.firmware_info.index = XEN_FW_EFI_VERSION;
> +
> + if (HYPERVISOR_platform_op(&op) == 0)
> + efi_systab_xen.hdr.revision = info->version;
> +
> + op.cmd = XENPF_firmware_info;
> + op.u.firmware_info.type = XEN_FW_EFI_INFO;
> + op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION;
> +
> + if (HYPERVISOR_platform_op(&op) == 0)
> + efi.runtime_version = info->version;
> +
> + return &efi_systab_xen;
> +}
>
> void __init xen_efi_init(void)
> {
> diff --git a/drivers/xen/efi.c b/drivers/xen/efi.c
> index be7e56a..22f71ff 100644
> --- a/drivers/xen/efi.c
> +++ b/drivers/xen/efi.c
> @@ -38,7 +38,7 @@
>
> #define efi_data(op) (op.u.efi_runtime_call)
>
> -static efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
> +efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
> {
> struct xen_platform_op op = INIT_EFI_OP(get_time);
>
> @@ -59,8 +59,9 @@ static efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_get_time);
>
> -static efi_status_t xen_efi_set_time(efi_time_t *tm)
> +efi_status_t xen_efi_set_time(efi_time_t *tm)
> {
> struct xen_platform_op op = INIT_EFI_OP(set_time);
>
> @@ -72,10 +73,10 @@ static efi_status_t xen_efi_set_time(efi_time_t *tm)
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_set_time);
>
> -static efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled,
> - efi_bool_t *pending,
> - efi_time_t *tm)
> +efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
> + efi_time_t *tm)
> {
> struct xen_platform_op op = INIT_EFI_OP(get_wakeup_time);
>
> @@ -95,8 +96,9 @@ static efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled,
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_get_wakeup_time);
>
> -static efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
> +efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
> {
> struct xen_platform_op op = INIT_EFI_OP(set_wakeup_time);
>
> @@ -113,12 +115,11 @@ static efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_set_wakeup_time);
>
> -static efi_status_t xen_efi_get_variable(efi_char16_t *name,
> - efi_guid_t *vendor,
> - u32 *attr,
> - unsigned long *data_size,
> - void *data)
> +efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
> + u32 *attr, unsigned long *data_size,
> + void *data)
> {
> struct xen_platform_op op = INIT_EFI_OP(get_variable);
>
> @@ -138,10 +139,11 @@ static efi_status_t xen_efi_get_variable(efi_char16_t *name,
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_get_variable);
>
> -static efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
> - efi_char16_t *name,
> - efi_guid_t *vendor)
> +efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
> + efi_char16_t *name,
> + efi_guid_t *vendor)
> {
> struct xen_platform_op op = INIT_EFI_OP(get_next_variable_name);
>
> @@ -161,12 +163,11 @@ static efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_get_next_variable);
>
> -static efi_status_t xen_efi_set_variable(efi_char16_t *name,
> - efi_guid_t *vendor,
> - u32 attr,
> - unsigned long data_size,
> - void *data)
> +efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
> + u32 attr, unsigned long data_size,
> + void *data)
> {
> struct xen_platform_op op = INIT_EFI_OP(set_variable);
>
> @@ -183,11 +184,11 @@ static efi_status_t xen_efi_set_variable(efi_char16_t *name,
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_set_variable);
>
> -static efi_status_t xen_efi_query_variable_info(u32 attr,
> - u64 *storage_space,
> - u64 *remaining_space,
> - u64 *max_variable_size)
> +efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
> + u64 *remaining_space,
> + u64 *max_variable_size)
> {
> struct xen_platform_op op = INIT_EFI_OP(query_variable_info);
>
> @@ -205,8 +206,9 @@ static efi_status_t xen_efi_query_variable_info(u32 attr,
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_query_variable_info);
>
> -static efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
> +efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
> {
> struct xen_platform_op op = INIT_EFI_OP(get_next_high_monotonic_count);
>
> @@ -217,10 +219,10 @@ static efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_get_next_high_mono_count);
>
> -static efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
> - unsigned long count,
> - unsigned long sg_list)
> +efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
> + unsigned long count, unsigned long sg_list)
> {
> struct xen_platform_op op = INIT_EFI_OP(update_capsule);
>
> @@ -237,11 +239,11 @@ static efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
>
> return efi_data(op).status;
> }
> +EXPORT_SYMBOL_GPL(xen_efi_update_capsule);
>
> -static efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
> - unsigned long count,
> - u64 *max_size,
> - int *reset_type)
> +efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
> + unsigned long count, u64 *max_size,
> + int *reset_type)
> {
> struct xen_platform_op op = INIT_EFI_OP(query_capsule_capabilities);
>
> @@ -260,112 +262,4 @@ static efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
>
> return efi_data(op).status;
> }
> -
> -static efi_char16_t vendor[100] __initdata;
> -
> -static efi_system_table_t efi_systab_xen __initdata = {
> - .hdr = {
> - .signature = EFI_SYSTEM_TABLE_SIGNATURE,
> - .revision = 0, /* Initialized later. */
> - .headersize = 0, /* Ignored by Linux Kernel. */
> - .crc32 = 0, /* Ignored by Linux Kernel. */
> - .reserved = 0
> - },
> - .fw_vendor = EFI_INVALID_TABLE_ADDR, /* Initialized later. */
> - .fw_revision = 0, /* Initialized later. */
> - .con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> - .con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> - .con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> - .con_out = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> - .stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> - .stderr = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
> - .runtime = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
> - /* Not used under Xen. */
> - .boottime = (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR,
> - /* Not used under Xen. */
> - .nr_tables = 0, /* Initialized later. */
> - .tables = EFI_INVALID_TABLE_ADDR /* Initialized later. */
> -};
> -
> -static const struct efi efi_xen __initconst = {
> - .systab = NULL, /* Initialized later. */
> - .runtime_version = 0, /* Initialized later. */
> - .mps = EFI_INVALID_TABLE_ADDR,
> - .acpi = EFI_INVALID_TABLE_ADDR,
> - .acpi20 = EFI_INVALID_TABLE_ADDR,
> - .smbios = EFI_INVALID_TABLE_ADDR,
> - .smbios3 = EFI_INVALID_TABLE_ADDR,
> - .sal_systab = EFI_INVALID_TABLE_ADDR,
> - .boot_info = EFI_INVALID_TABLE_ADDR,
> - .hcdp = EFI_INVALID_TABLE_ADDR,
> - .uga = EFI_INVALID_TABLE_ADDR,
> - .uv_systab = EFI_INVALID_TABLE_ADDR,
> - .fw_vendor = EFI_INVALID_TABLE_ADDR,
> - .runtime = EFI_INVALID_TABLE_ADDR,
> - .config_table = EFI_INVALID_TABLE_ADDR,
> - .get_time = xen_efi_get_time,
> - .set_time = xen_efi_set_time,
> - .get_wakeup_time = xen_efi_get_wakeup_time,
> - .set_wakeup_time = xen_efi_set_wakeup_time,
> - .get_variable = xen_efi_get_variable,
> - .get_next_variable = xen_efi_get_next_variable,
> - .set_variable = xen_efi_set_variable,
> - .query_variable_info = xen_efi_query_variable_info,
> - .update_capsule = xen_efi_update_capsule,
> - .query_capsule_caps = xen_efi_query_capsule_caps,
> - .get_next_high_mono_count = xen_efi_get_next_high_mono_count,
> - .reset_system = NULL, /* Functionality provided by Xen. */
> - .set_virtual_address_map = NULL, /* Not used under Xen. */
> - .memmap = NULL, /* Not used under Xen. */
> - .flags = 0 /* Initialized later. */
> -};
> -
> -efi_system_table_t __init *xen_efi_probe(void)
> -{
> - struct xen_platform_op op = {
> - .cmd = XENPF_firmware_info,
> - .u.firmware_info = {
> - .type = XEN_FW_EFI_INFO,
> - .index = XEN_FW_EFI_CONFIG_TABLE
> - }
> - };
> - union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
> -
> - if (!xen_initial_domain() || HYPERVISOR_platform_op(&op) < 0)
> - return NULL;
> -
> - /* Here we know that Xen runs on EFI platform. */
> -
> - efi = efi_xen;
> -
> - efi_systab_xen.tables = info->cfg.addr;
> - efi_systab_xen.nr_tables = info->cfg.nent;
> -
> - op.cmd = XENPF_firmware_info;
> - op.u.firmware_info.type = XEN_FW_EFI_INFO;
> - op.u.firmware_info.index = XEN_FW_EFI_VENDOR;
> - info->vendor.bufsz = sizeof(vendor);
> - set_xen_guest_handle(info->vendor.name, vendor);
> -
> - if (HYPERVISOR_platform_op(&op) == 0) {
> - efi_systab_xen.fw_vendor = __pa_symbol(vendor);
> - efi_systab_xen.fw_revision = info->vendor.revision;
> - } else
> - efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN");
> -
> - op.cmd = XENPF_firmware_info;
> - op.u.firmware_info.type = XEN_FW_EFI_INFO;
> - op.u.firmware_info.index = XEN_FW_EFI_VERSION;
> -
> - if (HYPERVISOR_platform_op(&op) == 0)
> - efi_systab_xen.hdr.revision = info->version;
> -
> - op.cmd = XENPF_firmware_info;
> - op.u.firmware_info.type = XEN_FW_EFI_INFO;
> - op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION;
> -
> - if (HYPERVISOR_platform_op(&op) == 0)
> - efi.runtime_version = info->version;
> -
> - return &efi_systab_xen;
> -}
> +EXPORT_SYMBOL_GPL(xen_efi_query_capsule_caps);
> diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
> index 42be31a..c83a338 100644
> --- a/include/xen/xen-ops.h
> +++ b/include/xen/xen-ops.h
> @@ -85,14 +85,28 @@ int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
>
> bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
>
> -#ifdef CONFIG_XEN_EFI
> -extern efi_system_table_t *xen_efi_probe(void);
> -#else
> -static inline efi_system_table_t __init *xen_efi_probe(void)
> -{
> - return NULL;
> -}
> -#endif
> +efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
> +efi_status_t xen_efi_set_time(efi_time_t *tm);
> +efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
> + efi_time_t *tm);
> +efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
> +efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
> + u32 *attr, unsigned long *data_size,
> + void *data);
> +efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
> + efi_char16_t *name, efi_guid_t *vendor);
> +efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
> + u32 attr, unsigned long data_size,
> + void *data);
> +efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
> + u64 *remaining_space,
> + u64 *max_variable_size);
> +efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
> +efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
> + unsigned long count, unsigned long sg_list);
> +efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
> + unsigned long count, u64 *max_size,
> + int *reset_type);
>
> #ifdef CONFIG_PREEMPT
>
> --
> 2.0.4
>
>
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