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Shutemov" To: Borislav Petkov , Andy Lutomirski , Dave Hansen , Sean Christopherson , Andrew Morton , Joerg Roedel , Ard Biesheuvel Cc: Andi Kleen , Kuppuswamy Sathyanarayanan , David Rientjes , Vlastimil Babka , Tom Lendacky , Thomas Gleixner , Peter Zijlstra , Paolo Bonzini , Ingo Molnar , Dario Faggioli , Mike Rapoport , David Hildenbrand , Mel Gorman , 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" , Borislav Petkov Subject: [PATCHv12 2/9] efi/x86: Get full memory map in allocate_e820() Date: Fri, 19 May 2023 02:14:27 +0300 Message-Id: <20230518231434.26080-3-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230518231434.26080-1-kirill.shutemov@linux.intel.com> References: <20230518231434.26080-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 4AAEA1C0011 X-Stat-Signature: wk8xbrzgkne16tqjx696mtfk51gmkq8k X-HE-Tag: 1684451691-588167 X-HE-Meta: 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 AsKa3ZGV eFHpBsQrBMAOr3hbkhnkjRvwREoNBi6xNutF2pD+YDiUJd1rAxCECYKOO0Jx9DXWyaG+XpfSkh2rJDJN3j5+RjhZK//t/EsuM22ANbQmTju61K2Do92tjgMqdQscYEXkmR2QuOn3SXBI6QT53soT3JDSSgQ7NH0q+k0MMsJRHaru0P7QtgnfKYHmRrjOpizC7+4Eevxmwio2czPCYo2G4eF4r+ldh9WZ4RakrvQKMPrA3D335zVaSPDgJ5FxRBtTcBzW0397bpaeZbJw= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 Reviewed-by: Borislav Petkov Acked-by: Ard Biesheuvel Reviewed-by: Tom Lendacky --- 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 {