From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Sean Christopherson <seanjc@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Joerg Roedel <jroedel@suse.de>, Ard Biesheuvel <ardb@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>,
David Rientjes <rientjes@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
Tom Lendacky <thomas.lendacky@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Dario Faggioli <dfaggioli@suse.com>,
Mike Rapoport <rppt@kernel.org>,
David Hildenbrand <david@redhat.com>,
Mel Gorman <mgorman@techsingularity.net>,
marcelo.cerri@canonical.com, tim.gardner@canonical.com,
khalid.elmously@canonical.com, philip.cox@canonical.com,
aarcange@redhat.com, peterx@redhat.com, x86@kernel.org,
linux-mm@kvack.org, linux-coco@lists.linux.dev,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Borislav Petkov <bp@suse.de>
Subject: [PATCHv12 2/9] efi/x86: Get full memory map in allocate_e820()
Date: Fri, 19 May 2023 02:14:27 +0300 [thread overview]
Message-ID: <20230518231434.26080-3-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20230518231434.26080-1-kirill.shutemov@linux.intel.com>
Currently allocate_e820() is only interested in the size of map and size
of memory descriptor to determine how many e820 entries the kernel
needs.
UEFI Specification version 2.9 introduces a new memory type --
unaccepted memory. To track unaccepted memory kernel needs to allocate
a bitmap. The size of the bitmap is dependent on the maximum physical
address present in the system. A full memory map is required to find
the maximum address.
Modify allocate_e820() to get a full memory map.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
---
drivers/firmware/efi/libstub/x86-stub.c | 26 +++++++++++--------------
1 file changed, 11 insertions(+), 15 deletions(-)
diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c
index a0bfd31358ba..fff81843169c 100644
--- a/drivers/firmware/efi/libstub/x86-stub.c
+++ b/drivers/firmware/efi/libstub/x86-stub.c
@@ -681,28 +681,24 @@ static efi_status_t allocate_e820(struct boot_params *params,
struct setup_data **e820ext,
u32 *e820ext_size)
{
- unsigned long map_size, desc_size, map_key;
+ struct efi_boot_memmap *map;
efi_status_t status;
- __u32 nr_desc, desc_version;
+ __u32 nr_desc;
- /* Only need the size of the mem map and size of each mem descriptor */
- map_size = 0;
- status = efi_bs_call(get_memory_map, &map_size, NULL, &map_key,
- &desc_size, &desc_version);
- if (status != EFI_BUFFER_TOO_SMALL)
- return (status != EFI_SUCCESS) ? status : EFI_UNSUPPORTED;
+ status = efi_get_memory_map(&map, false);
+ if (status != EFI_SUCCESS)
+ return status;
- nr_desc = map_size / desc_size + EFI_MMAP_NR_SLACK_SLOTS;
-
- if (nr_desc > ARRAY_SIZE(params->e820_table)) {
- u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table);
+ nr_desc = map->map_size / map->desc_size;
+ if (nr_desc > ARRAY_SIZE(params->e820_table) - EFI_MMAP_NR_SLACK_SLOTS) {
+ u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table) +
+ EFI_MMAP_NR_SLACK_SLOTS;
status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size);
- if (status != EFI_SUCCESS)
- return status;
}
- return EFI_SUCCESS;
+ efi_bs_call(free_pool, map);
+ return status;
}
struct exit_boot_struct {
--
2.39.3
next prev parent reply other threads:[~2023-05-18 23:14 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-18 23:14 [PATCHv12 0/9] mm, x86/cc, efi: Implement support for unaccepted memory Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 1/9] mm: Add " Kirill A. Shutemov
2023-05-31 15:51 ` Borislav Petkov
2023-05-31 16:27 ` Kirill A. Shutemov
2023-05-31 17:50 ` Borislav Petkov
2023-05-31 18:10 ` [PATCHv12.1 " Kirill A. Shutemov
2023-05-18 23:14 ` Kirill A. Shutemov [this message]
2023-05-18 23:14 ` [PATCHv12 3/9] efi/libstub: Implement " Kirill A. Shutemov
2023-05-19 15:12 ` Tom Lendacky
2023-05-18 23:14 ` [PATCHv12 4/9] x86/boot/compressed: Handle " Kirill A. Shutemov
2023-05-19 10:16 ` Kirill A. Shutemov
2023-05-22 11:01 ` Kirill A. Shutemov
2023-05-22 11:08 ` Ard Biesheuvel
2023-05-18 23:14 ` [PATCHv12 5/9] efi: Add unaccepted memory support Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 6/9] efi/unaccepted: Avoid load_unaligned_zeropad() stepping into unaccepted memory Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 7/9] x86/tdx: Make _tdx_hypercall() and __tdx_module_call() available in boot stub Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 8/9] x86/tdx: Refactor try_accept_one() Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 9/9] x86/tdx: Add unaccepted memory support Kirill A. Shutemov
2023-05-31 0:58 ` Isaku Yamahata
2023-05-31 12:25 ` Kirill A. Shutemov
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