diff options
Diffstat (limited to 'arch/arm64/kernel/hibernate.c')
| -rw-r--r-- | arch/arm64/kernel/hibernate.c | 49 |
1 files changed, 12 insertions, 37 deletions
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c index 46a0b4d6e251..2758f75d6809 100644 --- a/arch/arm64/kernel/hibernate.c +++ b/arch/arm64/kernel/hibernate.c @@ -49,10 +49,7 @@ extern int in_suspend; /* Do we need to reset el2? */ -#define el2_reset_needed() (is_hyp_mode_available() && !is_kernel_in_hyp_mode()) - -/* temporary el2 vectors in the __hibernate_exit_text section. */ -extern char hibernate_el2_vectors[]; +#define el2_reset_needed() (is_hyp_nvhe()) /* hyp-stub vectors, used to restore el2 during resume from hibernate. */ extern char __hyp_stub_vectors[]; @@ -215,26 +212,7 @@ static int create_safe_exec_page(void *src_start, size_t length, if (rc) return rc; - /* - * Load our new page tables. A strict BBM approach requires that we - * ensure that TLBs are free of any entries that may overlap with the - * global mappings we are about to install. - * - * For a real hibernate/resume cycle TTBR0 currently points to a zero - * page, but TLBs may contain stale ASID-tagged entries (e.g. for EFI - * runtime services), while for a userspace-driven test_resume cycle it - * points to userspace page tables (and we must point it at a zero page - * ourselves). - * - * We change T0SZ as part of installing the idmap. This is undone by - * cpu_uninstall_idmap() in __cpu_suspend_exit(). - */ - cpu_set_reserved_ttbr0(); - local_flush_tlb_all(); - __cpu_set_tcr_t0sz(t0sz); - write_sysreg(trans_ttbr0, ttbr0_el1); - isb(); - + cpu_install_ttbr0(trans_ttbr0, t0sz); *phys_dst_addr = virt_to_phys(page); return 0; @@ -434,6 +412,7 @@ int swsusp_arch_resume(void) void *zero_page; size_t exit_size; pgd_t *tmp_pg_dir; + phys_addr_t el2_vectors; void __noreturn (*hibernate_exit)(phys_addr_t, phys_addr_t, void *, void *, phys_addr_t, phys_addr_t); struct trans_pgd_info trans_info = { @@ -461,6 +440,14 @@ int swsusp_arch_resume(void) return -ENOMEM; } + if (el2_reset_needed()) { + rc = trans_pgd_copy_el2_vectors(&trans_info, &el2_vectors); + if (rc) { + pr_err("Failed to setup el2 vectors\n"); + return rc; + } + } + exit_size = __hibernate_exit_text_end - __hibernate_exit_text_start; /* * Copy swsusp_arch_suspend_exit() to a safe page. This will generate @@ -474,25 +461,13 @@ int swsusp_arch_resume(void) } /* - * The hibernate exit text contains a set of el2 vectors, that will - * be executed at el2 with the mmu off in order to reload hyp-stub. - */ - dcache_clean_inval_poc((unsigned long)hibernate_exit, - (unsigned long)hibernate_exit + exit_size); - - /* * KASLR will cause the el2 vectors to be in a different location in * the resumed kernel. Load hibernate's temporary copy into el2. * * We can skip this step if we booted at EL1, or are running with VHE. */ - if (el2_reset_needed()) { - phys_addr_t el2_vectors = (phys_addr_t)hibernate_exit; - el2_vectors += hibernate_el2_vectors - - __hibernate_exit_text_start; /* offset */ - + if (el2_reset_needed()) __hyp_set_vectors(el2_vectors); - } hibernate_exit(virt_to_phys(tmp_pg_dir), resume_hdr.ttbr1_el1, resume_hdr.reenter_kernel, restore_pblist, |