diff options
author | steve.wahl@hpe.com <steve.wahl@hpe.com> | 2020-07-14 00:30:06 +0300 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2020-07-17 17:47:48 +0300 |
commit | 6aa3baabe106fa1182f904107244147395902a09 (patch) | |
tree | 113e57e886f2b0b7ad4957a2e564699a3f0f9e9d /arch/x86 | |
parent | 66d67fecd896370d4cbbd146c9a7bf5b4c5303af (diff) | |
download | linux-6aa3baabe106fa1182f904107244147395902a09.tar.xz |
x86/platform/uv: Remove uv bios and efi code related to EFI_UV1_MEMMAP
With UV1 removed, EFI_UV1_MEMMAP is not longer used. Remove the code used
by it and the related code in EFI.
Signed-off-by: Steve Wahl <steve.wahl@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lkml.kernel.org/r/20200713212955.902592618@hpe.com
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/platform/efi/efi.c | 2 | ||||
-rw-r--r-- | arch/x86/platform/uv/bios_uv.c | 159 |
2 files changed, 2 insertions, 159 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 2cc159037def..f6ea8f1a9d57 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -496,7 +496,7 @@ void __init efi_init(void) efi_print_memmap(); } -#if defined(CONFIG_X86_32) || defined(CONFIG_X86_UV) +#if defined(CONFIG_X86_32) void __init efi_set_executable(efi_memory_desc_t *md, bool executable) { diff --git a/arch/x86/platform/uv/bios_uv.c b/arch/x86/platform/uv/bios_uv.c index cd2a6e2537f6..a6e5f2c1805d 100644 --- a/arch/x86/platform/uv/bios_uv.c +++ b/arch/x86/platform/uv/bios_uv.c @@ -30,17 +30,7 @@ static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, */ return BIOS_STATUS_UNIMPLEMENTED; - /* - * If EFI_UV1_MEMMAP is set, we need to fall back to using our old EFI - * callback method, which uses efi_call() directly, with the kernel page tables: - */ - if (unlikely(efi_enabled(EFI_UV1_MEMMAP))) { - kernel_fpu_begin(); - ret = efi_call((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5); - kernel_fpu_end(); - } else { - ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5); - } + ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5); return ret; } @@ -209,150 +199,3 @@ int uv_bios_init(void) pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision); return 0; } - -static void __init early_code_mapping_set_exec(int executable) -{ - efi_memory_desc_t *md; - - if (!(__supported_pte_mask & _PAGE_NX)) - return; - - /* Make EFI service code area executable */ - for_each_efi_memory_desc(md) { - if (md->type == EFI_RUNTIME_SERVICES_CODE || - md->type == EFI_BOOT_SERVICES_CODE) - efi_set_executable(md, executable); - } -} - -void __init efi_uv1_memmap_phys_epilog(pgd_t *save_pgd) -{ - /* - * After the lock is released, the original page table is restored. - */ - int pgd_idx, i; - int nr_pgds; - pgd_t *pgd; - p4d_t *p4d; - pud_t *pud; - - nr_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT) , PGDIR_SIZE); - - for (pgd_idx = 0; pgd_idx < nr_pgds; pgd_idx++) { - pgd = pgd_offset_k(pgd_idx * PGDIR_SIZE); - set_pgd(pgd_offset_k(pgd_idx * PGDIR_SIZE), save_pgd[pgd_idx]); - - if (!pgd_present(*pgd)) - continue; - - for (i = 0; i < PTRS_PER_P4D; i++) { - p4d = p4d_offset(pgd, - pgd_idx * PGDIR_SIZE + i * P4D_SIZE); - - if (!p4d_present(*p4d)) - continue; - - pud = (pud_t *)p4d_page_vaddr(*p4d); - pud_free(&init_mm, pud); - } - - p4d = (p4d_t *)pgd_page_vaddr(*pgd); - p4d_free(&init_mm, p4d); - } - - kfree(save_pgd); - - __flush_tlb_all(); - early_code_mapping_set_exec(0); -} - -pgd_t * __init efi_uv1_memmap_phys_prolog(void) -{ - unsigned long vaddr, addr_pgd, addr_p4d, addr_pud; - pgd_t *save_pgd, *pgd_k, *pgd_efi; - p4d_t *p4d, *p4d_k, *p4d_efi; - pud_t *pud; - - int pgd; - int n_pgds, i, j; - - early_code_mapping_set_exec(1); - - n_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT), PGDIR_SIZE); - save_pgd = kmalloc_array(n_pgds, sizeof(*save_pgd), GFP_KERNEL); - if (!save_pgd) - return NULL; - - /* - * Build 1:1 identity mapping for UV1 memmap usage. Note that - * PAGE_OFFSET is PGDIR_SIZE aligned when KASLR is disabled, while - * it is PUD_SIZE ALIGNED with KASLR enabled. So for a given physical - * address X, the pud_index(X) != pud_index(__va(X)), we can only copy - * PUD entry of __va(X) to fill in pud entry of X to build 1:1 mapping. - * This means here we can only reuse the PMD tables of the direct mapping. - */ - for (pgd = 0; pgd < n_pgds; pgd++) { - addr_pgd = (unsigned long)(pgd * PGDIR_SIZE); - vaddr = (unsigned long)__va(pgd * PGDIR_SIZE); - pgd_efi = pgd_offset_k(addr_pgd); - save_pgd[pgd] = *pgd_efi; - - p4d = p4d_alloc(&init_mm, pgd_efi, addr_pgd); - if (!p4d) { - pr_err("Failed to allocate p4d table!\n"); - goto out; - } - - for (i = 0; i < PTRS_PER_P4D; i++) { - addr_p4d = addr_pgd + i * P4D_SIZE; - p4d_efi = p4d + p4d_index(addr_p4d); - - pud = pud_alloc(&init_mm, p4d_efi, addr_p4d); - if (!pud) { - pr_err("Failed to allocate pud table!\n"); - goto out; - } - - for (j = 0; j < PTRS_PER_PUD; j++) { - addr_pud = addr_p4d + j * PUD_SIZE; - - if (addr_pud > (max_pfn << PAGE_SHIFT)) - break; - - vaddr = (unsigned long)__va(addr_pud); - - pgd_k = pgd_offset_k(vaddr); - p4d_k = p4d_offset(pgd_k, vaddr); - pud[j] = *pud_offset(p4d_k, vaddr); - } - } - pgd_offset_k(pgd * PGDIR_SIZE)->pgd &= ~_PAGE_NX; - } - - __flush_tlb_all(); - return save_pgd; -out: - efi_uv1_memmap_phys_epilog(save_pgd); - return NULL; -} - -void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size, - u32 type, u64 attribute) -{ - unsigned long last_map_pfn; - - if (type == EFI_MEMORY_MAPPED_IO) - return ioremap(phys_addr, size); - - last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size, - PAGE_KERNEL); - if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) { - unsigned long top = last_map_pfn << PAGE_SHIFT; - efi_ioremap(top, size - (top - phys_addr), type, attribute); - } - - if (!(attribute & EFI_MEMORY_WB)) - efi_memory_uc((u64)(unsigned long)__va(phys_addr), size); - - return (void __iomem *)__va(phys_addr); -} |