[mini-os master] kexec: fix physical addresses in start info data

[patchbot@xxxxxxx]

commit d373b3fde4c344798d45e184b840999ba4da9ff1
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Tue Jul 15 15:29:24 2025 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jul 16 15:04:11 2025 +0200

    kexec: fix physical addresses in start info data
    
    The physical addresses in struct hvm_start_info are pointing to the
    memory where the data is being built instead of the location where it
    will finally be moved to.
    
    Fix that. Additionally rename kexec_param_loc to kexec_param_pa to
    better reflect the semantics of the variable.
    
    Fixes: b7994b6409a4 ("mini-os: kexec: build parameters for new kernel")
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
---
 arch/x86/kexec.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kexec.c b/arch/x86/kexec.c
index fc58473..d0af460 100644
--- a/arch/x86/kexec.c
+++ b/arch/x86/kexec.c
@@ -197,7 +197,7 @@ bool kexec_arch_need_analyze_shdrs(void)
     return kernel_phys_entry == ~0UL;
 }
 
-static unsigned long kexec_param_loc;
+static unsigned long kexec_param_pa;
 static unsigned int kexec_param_size;
 static unsigned long kexec_param_mem;
 
@@ -208,7 +208,7 @@ void kexec_set_param_loc(const char *cmdline)
     kexec_param_size += strlen(cmdline) + 1;
 
     kexec_last_addr = (kexec_last_addr + 7) & ~7UL;
-    kexec_param_loc = kexec_last_addr;
+    kexec_param_pa = kexec_last_addr;
     kexec_last_addr += kexec_param_size;
     kexec_last_addr = round_pgup(kexec_last_addr);
 }
@@ -233,9 +233,9 @@ int kexec_get_entry(const char *cmdline)
     memset(info, 0, sizeof(*info));
     info->magic = XEN_HVM_START_MAGIC_VALUE;
     info->version = 1;
-    info->cmdline_paddr = kexec_param_mem + sizeof(*info) +
+    info->cmdline_paddr = kexec_param_pa + sizeof(*info) +
                           e820_entries * sizeof(struct hvm_memmap_table_entry);
-    info->memmap_paddr = kexec_param_mem + sizeof(*info);
+    info->memmap_paddr = kexec_param_pa + sizeof(*info);
     info->memmap_entries = e820_entries;
 
     mmap = (struct hvm_memmap_table_entry *)(info + 1);
@@ -249,13 +249,13 @@ int kexec_get_entry(const char *cmdline)
 
     strcpy((char *)mmap, cmdline);
 
-    if ( kexec_add_action(KEXEC_COPY, to_virt(kexec_param_loc), info,
+    if ( kexec_add_action(KEXEC_COPY, to_virt(kexec_param_pa), info,
                           kexec_param_size) )
         return ENOSPC;
 
     /* The call of the new kernel happens via the physical address! */
     if ( kexec_add_action(KEXEC_CALL, (void *)kernel_phys_entry,
-                          (void *)kexec_param_loc, 0) )
+                          (void *)kexec_param_pa, 0) )
         return ENOSPC;
 
     return 0;
--
generated by git-patchbot for /home/xen/git/mini-os.git#master