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Smith" To: xen-devel@lists.xenproject.org Cc: "Daniel P. Smith" , jason.andryuk@amd.com, christopher.w.clark@gmail.com, stefano.stabellini@amd.com, Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [PATCH v6 13/44] x86/boot: transition relocation calculations to struct boot_module Date: Thu, 17 Oct 2024 13:02:53 -0400 Message-Id: <20241017170325.3842-14-dpsmith@apertussolutions.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20241017170325.3842-1-dpsmith@apertussolutions.com> References: <20241017170325.3842-1-dpsmith@apertussolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External X-ZohoMail-DKIM: pass (identity dpsmith@apertussolutions.com) X-ZM-MESSAGEID: 1729184792254116600 Content-Type: text/plain; charset="utf-8" Use struct boot_module fields, start and size, when calculating the relocat= ion address and size. It also ensures that early_mod references are kept in syn= c. Signed-off-by: Daniel P. Smith Reviewed-by: Jason Andryuk --- Changes since v5: - removed unnecessary paddr_to_pfn, allowing condition to collapse to one l= ine - correct a missed conversion from .mod->mod_start to .start --- xen/arch/x86/setup.c | 38 +++++++++++++++++--------------------- 1 file changed, 17 insertions(+), 21 deletions(-) diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c index d51b0b03bc97..44cec48fc877 100644 --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -1476,7 +1476,7 @@ void asmlinkage __init noreturn __start_xen(unsigned = long mbi_p) * move mod[0], we incorporate this as extra space at the star= t. */ struct boot_module *bm =3D &bi->mods[j]; - unsigned long size =3D PAGE_ALIGN(bm->headroom + bm->mod->mod_= end); + unsigned long size =3D PAGE_ALIGN(bm->headroom + bm->size); =20 if ( bi->mods[j].flags & BOOTMOD_FLAG_X86_RELOCATED ) continue; @@ -1488,15 +1488,13 @@ void asmlinkage __init noreturn __start_xen(unsigne= d long mbi_p) if ( highmem_start && end > highmem_start ) continue; =20 - if ( s < end && - (bm->headroom || - ((end - size) >> PAGE_SHIFT) > bm->mod->mod_start) ) + if ( s < end && (bm->headroom || (end - size) > bm->start) ) { - move_memory(end - size + bm->headroom, - (uint64_t)bm->mod->mod_start << PAGE_SHIFT, - bm->mod->mod_end); - bm->mod->mod_start =3D (end - size) >> PAGE_SHIFT; - bm->mod->mod_end +=3D bm->headroom; + move_memory(end - size + bm->headroom, bm->start, bm->size= ); + bm->start =3D (end - size); + bm->mod->mod_start =3D paddr_to_pfn(bm->start); + bm->size +=3D bm->headroom; + bm->mod->mod_end =3D bm->size; bm->flags |=3D BOOTMOD_FLAG_X86_RELOCATED; } } @@ -1528,11 +1526,10 @@ void asmlinkage __init noreturn __start_xen(unsigne= d long mbi_p) panic("Not enough memory to relocate the dom0 kernel image\n"); for ( i =3D 0; i < bi->nr_modules; ++i ) { - uint64_t s =3D (uint64_t)bi->mods[i].mod->mod_start - << PAGE_SHIFT; + uint64_t s =3D (uint64_t)bi->mods[i].start; =20 reserve_e820_ram(&boot_e820, s, - s + PAGE_ALIGN(bi->mods[i].mod->mod_end)); + s + PAGE_ALIGN(bi->mods[i].size)); } =20 if ( !xen_phys_start ) @@ -1610,9 +1607,8 @@ void asmlinkage __init noreturn __start_xen(unsigned = long mbi_p) map_e =3D boot_e820.map[j].addr + boot_e820.map[j].size; for ( j =3D 0; j < bi->nr_modules; ++j ) { - uint64_t end =3D pfn_to_paddr( - bi->mods[j].mod->mod_start) + - bi->mods[j].mod->mod_end; + uint64_t end =3D bi->mods[j].start + + bi->mods[j].size; =20 if ( map_e < end ) map_e =3D end; @@ -1686,12 +1682,12 @@ void asmlinkage __init noreturn __start_xen(unsigne= d long mbi_p) =20 for ( i =3D 0; i < bi->nr_modules; ++i ) { - set_pdx_range(bi->mods[i].mod->mod_start, - bi->mods[i].mod->mod_start + - PFN_UP(bi->mods[i].mod->mod_end)); - map_pages_to_xen((unsigned long)mfn_to_virt(bi->mods[i].mod->mod_s= tart), - _mfn(bi->mods[i].mod->mod_start), - PFN_UP(bi->mods[i].mod->mod_end), PAGE_HYPERVISOR); + set_pdx_range(paddr_to_pfn(bi->mods[i].start), + paddr_to_pfn(bi->mods[i].start) + + PFN_UP(bi->mods[i].size)); + map_pages_to_xen((unsigned long)maddr_to_virt(bi->mods[i].start), + maddr_to_mfn(bi->mods[i].start), + PFN_UP(bi->mods[i].size), PAGE_HYPERVISOR); } =20 #ifdef CONFIG_KEXEC --=20 2.30.2