Create a struct header within kernel_info with the contents common to
kernel_info and boot_domain, and define that header in common code. This enables
x86 to use that header as-is and drop x86's boot_domain.
Not a functional change.
Signed-off-by: Alejandro Vallejo <agarciav@amd.com>
---
v3:
* s/bootdomain/boot_domain/
---
xen/arch/arm/dom0less-build.c | 8 ++++----
xen/arch/arm/domain_build.c | 20 ++++++++++----------
xen/arch/arm/kernel.c | 8 ++++----
xen/common/device-tree/dom0less-build.c | 18 +++++++++---------
xen/common/device-tree/domain-build.c | 20 ++++++++++----------
xen/common/device-tree/kernel.c | 20 ++++++++++----------
xen/include/xen/bootfdt.h | 10 ++++++++++
xen/include/xen/fdt-kernel.h | 5 ++---
8 files changed, 59 insertions(+), 50 deletions(-)
diff --git a/xen/arch/arm/dom0less-build.c b/xen/arch/arm/dom0less-build.c
index 20aabf6be5..a335551484 100644
--- a/xen/arch/arm/dom0less-build.c
+++ b/xen/arch/arm/dom0less-build.c
@@ -32,7 +32,7 @@ static int __init make_gicv2_domU_node(struct kernel_info *kinfo)
int res = 0;
__be32 reg[(GUEST_ROOT_ADDRESS_CELLS + GUEST_ROOT_SIZE_CELLS) * 2];
__be32 *cells;
- const struct domain *d = kinfo->d;
+ const struct domain *d = kinfo->hdr.d;
res = domain_fdt_begin_node(fdt, "interrupt-controller",
vgic_dist_base(&d->arch.vgic));
@@ -85,7 +85,7 @@ static int __init make_gicv3_domU_node(struct kernel_info *kinfo)
void *fdt = kinfo->fdt;
int res = 0;
__be32 *reg, *cells;
- const struct domain *d = kinfo->d;
+ const struct domain *d = kinfo->hdr.d;
unsigned int i, len = 0;
res = domain_fdt_begin_node(fdt, "interrupt-controller",
@@ -152,7 +152,7 @@ static int __init make_gicv3_domU_node(struct kernel_info *kinfo)
int __init make_intc_domU_node(struct kernel_info *kinfo)
{
- switch ( kinfo->d->arch.vgic.version )
+ switch ( kinfo->hdr.d->arch.vgic.version )
{
#ifdef CONFIG_GICV3
case GIC_V3:
@@ -175,7 +175,7 @@ static int __init make_vpl011_uart_node(struct kernel_info *kinfo)
gic_interrupt_t intr;
__be32 reg[GUEST_ROOT_ADDRESS_CELLS + GUEST_ROOT_SIZE_CELLS];
__be32 *cells;
- struct domain *d = kinfo->d;
+ struct domain *d = kinfo->hdr.d;
res = domain_fdt_begin_node(fdt, "sbsa-uart", d->arch.vpl011.base_addr);
if ( res )
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 7096e176ed..4eb1ed0548 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -464,8 +464,8 @@ static int __init write_properties(struct domain *d, struct kernel_info *kinfo,
int had_dom0_bootargs = 0;
struct dt_device_node *iommu_node;
- if ( kinfo->cmdline && kinfo->cmdline[0] )
- bootargs = &kinfo->cmdline[0];
+ if ( kinfo->hdr.cmdline && kinfo->hdr.cmdline[0] )
+ bootargs = &kinfo->hdr.cmdline[0];
/*
* We always skip the IOMMU device when creating DT for hwdom if there is
@@ -579,7 +579,7 @@ static int __init write_properties(struct domain *d, struct kernel_info *kinfo,
if ( dt_node_path_is_equal(node, "/chosen") )
{
- const struct boot_module *initrd = kinfo->initrd;
+ const struct boot_module *initrd = kinfo->hdr.initrd;
if ( bootargs )
{
@@ -1386,7 +1386,7 @@ int __init make_timer_node(const struct kernel_info *kinfo)
if ( res )
return res;
- if ( !is_64bit_domain(kinfo->d) )
+ if ( !is_64bit_domain(kinfo->hdr.d) )
res = fdt_property_string(fdt, "compatible", "arm,armv7-timer");
else
res = fdt_property_string(fdt, "compatible", "arm,armv8-timer");
@@ -1398,7 +1398,7 @@ int __init make_timer_node(const struct kernel_info *kinfo)
* It always exposes an active-low level-sensitive interrupt.
*/
- if ( is_hardware_domain(kinfo->d) )
+ if ( is_hardware_domain(kinfo->hdr.d) )
{
irq[TIMER_PHYS_SECURE_PPI] = timer_get_irq(TIMER_PHYS_SECURE_PPI);
irq[TIMER_PHYS_NONSECURE_PPI] =
@@ -1447,7 +1447,7 @@ int __init make_chosen_node(const struct kernel_info *kinfo)
{
int res;
const char *bootargs = NULL;
- const struct boot_module *initrd = kinfo->initrd;
+ const struct boot_module *initrd = kinfo->hdr.initrd;
void *fdt = kinfo->fdt;
dt_dprintk("Create chosen node\n");
@@ -1455,9 +1455,9 @@ int __init make_chosen_node(const struct kernel_info *kinfo)
if ( res )
return res;
- if ( kinfo->cmdline && kinfo->cmdline[0] )
+ if ( kinfo->hdr.cmdline && kinfo->hdr.cmdline[0] )
{
- bootargs = &kinfo->cmdline[0];
+ bootargs = &kinfo->hdr.cmdline[0];
res = fdt_property(fdt, "bootargs", bootargs, strlen(bootargs) + 1);
if ( res )
return res;
@@ -1906,7 +1906,7 @@ static int __init construct_dom0(struct domain *d)
d->max_pages = dom0_mem >> PAGE_SHIFT;
kinfo.unassigned_mem = dom0_mem;
- kinfo.d = d;
+ kinfo.hdr.d = d;
rc = kernel_probe(&kinfo, NULL);
if ( rc < 0 )
@@ -1918,7 +1918,7 @@ static int __init construct_dom0(struct domain *d)
int __init construct_hwdom(struct kernel_info *kinfo,
const struct dt_device_node *node)
{
- struct domain *d = kinfo->d;
+ struct domain *d = kinfo->hdr.d;
int rc;
iommu_hwdom_init(d);
diff --git a/xen/arch/arm/kernel.c b/xen/arch/arm/kernel.c
index e734ec5c1e..10e5dcad5e 100644
--- a/xen/arch/arm/kernel.c
+++ b/xen/arch/arm/kernel.c
@@ -46,7 +46,7 @@ static void __init place_modules(struct kernel_info *info,
paddr_t kernbase, paddr_t kernend)
{
/* Align DTB and initrd size to 2Mb. Linux only requires 4 byte alignment */
- const struct boot_module *mod = info->initrd;
+ const struct boot_module *mod = info->hdr.initrd;
const struct membanks *mem = kernel_info_get_mem(info);
const paddr_t initrd_len = ROUNDUP(mod ? mod->size : 0, MB(2));
const paddr_t dtb_len = ROUNDUP(fdt_totalsize(info->fdt), MB(2));
@@ -152,12 +152,12 @@ static void __init kernel_zimage_load(struct kernel_info *info)
kernel = ioremap_wc(paddr, len);
if ( !kernel )
- panic("Unable to map the %pd kernel\n", info->d);
+ panic("Unable to map the %pd kernel\n", info->hdr.d);
- rc = copy_to_guest_phys_flush_dcache(info->d, load_addr,
+ rc = copy_to_guest_phys_flush_dcache(info->hdr.d, load_addr,
kernel, len);
if ( rc != 0 )
- panic("Unable to copy the kernel in the %pd memory\n", info->d);
+ panic("Unable to copy the kernel in the %pd memory\n", info->hdr.d);
iounmap(kernel);
}
diff --git a/xen/common/device-tree/dom0less-build.c b/xen/common/device-tree/dom0less-build.c
index 221b875a2f..e321747175 100644
--- a/xen/common/device-tree/dom0less-build.c
+++ b/xen/common/device-tree/dom0less-build.c
@@ -167,18 +167,18 @@ static int __init handle_passthrough_prop(struct kernel_info *kinfo,
return -EINVAL;
}
- res = iomem_permit_access(kinfo->d, paddr_to_pfn(mstart),
+ res = iomem_permit_access(kinfo->hdr.d, paddr_to_pfn(mstart),
paddr_to_pfn(PAGE_ALIGN(mstart + size - 1)));
if ( res )
{
printk(XENLOG_ERR "Unable to permit to dom%d access to"
" 0x%"PRIpaddr" - 0x%"PRIpaddr"\n",
- kinfo->d->domain_id,
+ kinfo->hdr.d->domain_id,
mstart & PAGE_MASK, PAGE_ALIGN(mstart + size) - 1);
return res;
}
- res = map_regions_p2mt(kinfo->d,
+ res = map_regions_p2mt(kinfo->hdr.d,
gaddr_to_gfn(gstart),
PFN_DOWN(size),
maddr_to_mfn(mstart),
@@ -217,7 +217,7 @@ static int __init handle_passthrough_prop(struct kernel_info *kinfo,
return -EINVAL;
}
- res = map_device_irqs_to_domain(kinfo->d, node, true, NULL);
+ res = map_device_irqs_to_domain(kinfo->hdr.d, node, true, NULL);
if ( res < 0 )
return res;
@@ -229,7 +229,7 @@ static int __init handle_passthrough_prop(struct kernel_info *kinfo,
if ( xen_force && !dt_device_is_protected(node) )
return 0;
- return iommu_assign_dt_device(kinfo->d, node);
+ return iommu_assign_dt_device(kinfo->hdr.d, node);
}
static int __init handle_prop_pfdt(struct kernel_info *kinfo,
@@ -296,14 +296,14 @@ static int __init handle_prop_pfdt(struct kernel_info *kinfo,
address_cells, size_cells);
if ( res < 0 )
{
- printk(XENLOG_ERR "Failed to assign device to %pd\n", kinfo->d);
+ printk(XENLOG_ERR "Failed to assign device to %pd\n", kinfo->hdr.d);
return res;
}
}
else if ( (xen_path && !xen_reg) || (xen_reg && !xen_path && !xen_force) )
{
printk(XENLOG_ERR "xen,reg or xen,path missing for %pd\n",
- kinfo->d);
+ kinfo->hdr.d);
return -EINVAL;
}
@@ -605,7 +605,7 @@ static int __init alloc_xenstore_page(struct domain *d)
static int __init alloc_xenstore_params(struct kernel_info *kinfo)
{
- struct domain *d = kinfo->d;
+ struct domain *d = kinfo->hdr.d;
int rc = 0;
#ifdef CONFIG_HVM
@@ -773,7 +773,7 @@ static int __init construct_domU(struct domain *d,
d->max_pages = ((paddr_t)mem * SZ_1K) >> PAGE_SHIFT;
- kinfo.d = d;
+ kinfo.hdr.d = d;
rc = kernel_probe(&kinfo, node);
if ( rc < 0 )
diff --git a/xen/common/device-tree/domain-build.c b/xen/common/device-tree/domain-build.c
index fa4f700597..6014e39fd6 100644
--- a/xen/common/device-tree/domain-build.c
+++ b/xen/common/device-tree/domain-build.c
@@ -76,7 +76,7 @@ bool __init allocate_bank_memory(struct kernel_info *kinfo, gfn_t sgfn,
paddr_t tot_size)
{
struct membanks *mem = kernel_info_get_mem(kinfo);
- struct domain *d = kinfo->d;
+ struct domain *d = kinfo->hdr.d;
struct membank *bank;
/*
@@ -170,7 +170,7 @@ int __init find_unallocated_memory(const struct kernel_info *kinfo,
unsigned int i, j;
int res;
- ASSERT(domain_use_host_layout(kinfo->d));
+ ASSERT(domain_use_host_layout(kinfo->hdr.d));
unalloc_mem = rangeset_new(NULL, NULL, 0);
if ( !unalloc_mem )
@@ -331,23 +331,23 @@ void __init dtb_load(struct kernel_info *kinfo,
unsigned long left;
printk("Loading %pd DTB to 0x%"PRIpaddr"-0x%"PRIpaddr"\n",
- kinfo->d, kinfo->dtb_paddr,
+ kinfo->hdr.d, kinfo->dtb_paddr,
kinfo->dtb_paddr + fdt_totalsize(kinfo->fdt));
- left = copy_to_guest(kinfo->d, kinfo->dtb_paddr,
+ left = copy_to_guest(kinfo->hdr.d, kinfo->dtb_paddr,
kinfo->fdt,
fdt_totalsize(kinfo->fdt));
if ( left != 0 )
panic("Unable to copy the DTB to %pd memory (left = %lu bytes)\n",
- kinfo->d, left);
+ kinfo->hdr.d, left);
xfree(kinfo->fdt);
}
void __init initrd_load(struct kernel_info *kinfo,
copy_to_guest_phys_cb copy_to_guest)
{
- const struct boot_module *mod = kinfo->initrd;
+ const struct boot_module *mod = kinfo->hdr.initrd;
paddr_t load_addr = kinfo->initrd_paddr;
paddr_t paddr, len;
int node;
@@ -363,7 +363,7 @@ void __init initrd_load(struct kernel_info *kinfo,
len = mod->size;
printk("Loading %pd initrd from %"PRIpaddr" to 0x%"PRIpaddr"-0x%"PRIpaddr"\n",
- kinfo->d, paddr, load_addr, load_addr + len);
+ kinfo->hdr.d, paddr, load_addr, load_addr + len);
/* Fix up linux,initrd-start and linux,initrd-end in /chosen */
node = fdt_path_offset(kinfo->fdt, "/chosen");
@@ -386,12 +386,12 @@ void __init initrd_load(struct kernel_info *kinfo,
initrd = ioremap_wc(paddr, len);
if ( !initrd )
- panic("Unable to map the %pd initrd\n", kinfo->d);
+ panic("Unable to map the %pd initrd\n", kinfo->hdr.d);
- res = copy_to_guest(kinfo->d, load_addr,
+ res = copy_to_guest(kinfo->hdr.d, load_addr,
initrd, len);
if ( res != 0 )
- panic("Unable to copy the initrd in the %pd memory\n", kinfo->d);
+ panic("Unable to copy the initrd in the %pd memory\n", kinfo->hdr.d);
iounmap(initrd);
}
diff --git a/xen/common/device-tree/kernel.c b/xen/common/device-tree/kernel.c
index e1b22dc1c7..7a00768e6b 100644
--- a/xen/common/device-tree/kernel.c
+++ b/xen/common/device-tree/kernel.c
@@ -136,16 +136,16 @@ int __init kernel_probe(struct kernel_info *info,
/* domain is NULL only for the hardware domain */
if ( domain == NULL )
{
- ASSERT(is_hardware_domain(info->d));
+ ASSERT(is_hardware_domain(info->hdr.d));
mod = boot_module_find_by_kind(BOOTMOD_KERNEL);
- info->kernel = mod;
- info->initrd = boot_module_find_by_kind(BOOTMOD_RAMDISK);
+ info->hdr.kernel = mod;
+ info->hdr.initrd = boot_module_find_by_kind(BOOTMOD_RAMDISK);
cmd = boot_cmdline_find_by_kind(BOOTMOD_KERNEL);
if ( cmd )
- info->cmdline = &cmd->cmdline[0];
+ info->hdr.cmdline = &cmd->cmdline[0];
}
else
{
@@ -162,7 +162,7 @@ int __init kernel_probe(struct kernel_info *info,
dt_get_range(&val, node, &kernel_addr, &size);
mod = boot_module_find_by_addr_and_kind(
BOOTMOD_KERNEL, kernel_addr);
- info->kernel = mod;
+ info->hdr.kernel = mod;
}
else if ( dt_device_is_compatible(node, "multiboot,ramdisk") )
{
@@ -171,7 +171,7 @@ int __init kernel_probe(struct kernel_info *info,
val = dt_get_property(node, "reg", &len);
dt_get_range(&val, node, &initrd_addr, &size);
- info->initrd = boot_module_find_by_addr_and_kind(
+ info->hdr.initrd = boot_module_find_by_addr_and_kind(
BOOTMOD_RAMDISK, initrd_addr);
}
else if ( dt_device_is_compatible(node, "multiboot,device-tree") )
@@ -192,7 +192,7 @@ int __init kernel_probe(struct kernel_info *info,
name = dt_node_name(domain);
cmd = boot_cmdline_find_by_name(name);
if ( cmd )
- info->cmdline = &cmd->cmdline[0];
+ info->hdr.cmdline = &cmd->cmdline[0];
}
if ( !mod || !mod->size )
{
@@ -201,10 +201,10 @@ int __init kernel_probe(struct kernel_info *info,
}
printk("Loading %pd kernel from boot module @ %"PRIpaddr"\n",
- info->d, info->kernel->start);
- if ( info->initrd )
+ info->hdr.d, info->hdr.kernel->start);
+ if ( info->hdr.initrd )
printk("Loading ramdisk from boot module @ %"PRIpaddr"\n",
- info->initrd->start);
+ info->hdr.initrd->start);
/*
* uImage isn't really used nowadays thereby leave kernel_uimage_probe()
diff --git a/xen/include/xen/bootfdt.h b/xen/include/xen/bootfdt.h
index 854e7f1ed9..be0abe30ef 100644
--- a/xen/include/xen/bootfdt.h
+++ b/xen/include/xen/bootfdt.h
@@ -100,6 +100,16 @@ struct shared_meminfo {
struct shmem_membank_extra extra[NR_SHMEM_BANKS];
};
+
+struct boot_domain {
+ struct domain *d;
+
+ struct boot_module *kernel;
+ struct boot_module *initrd;
+
+ const char* cmdline;
+};
+
/*
* The domU flag is set for kernels and ramdisks of "xen,domain" nodes.
* The purpose of the domU flag is to avoid getting confused in
diff --git a/xen/include/xen/fdt-kernel.h b/xen/include/xen/fdt-kernel.h
index 12a0b42d17..fee8eac1db 100644
--- a/xen/include/xen/fdt-kernel.h
+++ b/xen/include/xen/fdt-kernel.h
@@ -16,7 +16,7 @@
#endif
struct kernel_info {
- struct domain *d;
+ struct boot_domain hdr;
void *fdt; /* flat device tree */
paddr_t unassigned_mem; /* RAM not (yet) assigned to a bank */
@@ -34,8 +34,7 @@ struct kernel_info {
paddr_t gnttab_size;
/* boot blob load addresses */
- const struct boot_module *kernel, *initrd, *dtb;
- const char* cmdline;
+ const struct boot_module *dtb;
paddr_t dtb_paddr;
paddr_t initrd_paddr;
--
2.43.0On 6/13/25 11:13, Alejandro Vallejo wrote: > Create a struct header within kernel_info with the contents common to > kernel_info and boot_domain, and define that header in common code. This enables > x86 to use that header as-is and drop x86's boot_domain IMHO kernel_info is an extremely poor name for this structure and hyperlauch attempt to resolve some of these less than optimal choices is being undone. v/r, dps
On Tue Jun 17, 2025 at 3:22 AM CEST, Daniel P. Smith wrote: > > On 6/13/25 11:13, Alejandro Vallejo wrote: >> Create a struct header within kernel_info with the contents common to >> kernel_info and boot_domain, and define that header in common code. This enables >> x86 to use that header as-is and drop x86's boot_domain > > IMHO kernel_info is an extremely poor name for this structure and > hyperlauch attempt to resolve some of these less than optimal choices is > being undone. > > v/r, > dps kernel_info is a big misnomer, which is why I originally typedeff'd it to bootdomain_t. Note however that at no point (in v3) does kernel_info reach x86. The header is effectively what was already in boot_domain, except it's common code now so the domid field (not yet included in dom0less) goes on an "arch" subfield. And x86 only uses that header and doesn't know or care about the rest. Cheers, Alejandro
On Fri, 13 Jun 2025, Alejandro Vallejo wrote: > Create a struct header within kernel_info with the contents common to > kernel_info and boot_domain, and define that header in common code. This enables > x86 to use that header as-is and drop x86's boot_domain. > > Not a functional change. > > Signed-off-by: Alejandro Vallejo <agarciav@amd.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
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