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https://github.com/projectacrn/acrn-hypervisor.git
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f4122d99c5
Replace the BSD-3-Clause boiler plate license text with an SPDX tag. Fixes: #189 Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <hypervisor.h>
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#include <ucode.h>
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uint64_t get_microcode_version(void)
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{
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uint64_t val;
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uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
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msr_write(MSR_IA32_BIOS_SIGN_ID, 0);
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cpuid(CPUID_FEATURES, &eax, &ebx, &ecx, &edx);
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val = msr_read(MSR_IA32_BIOS_SIGN_ID);
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return val;
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}
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/*
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* According to SDM vol 3 Table 9-7. If data_size field of uCode
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* header is zero, the ucode length is 2000
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*/
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#define GET_DATA_SIZE(hdptr) \
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((hdptr)->data_size ? ((hdptr)->data_size) : 2000)
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void acrn_update_ucode(struct vcpu *vcpu, uint64_t v)
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{
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uint64_t hva, gpa, gva;
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struct ucode_header *uhdr;
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int data_size, data_page_num;
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uint8_t *ucode_ptr, *ptr;
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int chunk_size;
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gva = v - sizeof(struct ucode_header);
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vm_gva2gpa(vcpu, gva, &gpa);
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uhdr = (struct ucode_header *)GPA2HVA(vcpu->vm, gpa);
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data_size = GET_DATA_SIZE(uhdr) + sizeof(struct ucode_header);
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data_page_num =
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(data_size + CPU_PAGE_SIZE - 1) >> CPU_PAGE_SHIFT;
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ptr = ucode_ptr = alloc_pages(data_page_num);
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if (ptr == NULL)
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return;
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hva = (uint64_t)uhdr;
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while (true) {
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chunk_size = CPU_PAGE_SIZE - (hva & (CPU_PAGE_SIZE - 1));
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chunk_size = (chunk_size < data_size) ? chunk_size : data_size;
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memcpy_s(ucode_ptr, chunk_size, (uint8_t *)hva, chunk_size);
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data_size -= chunk_size;
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if (data_size <= 0)
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break;
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ucode_ptr += chunk_size;
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gva += chunk_size;
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vm_gva2gpa(vcpu, gva, &gpa);
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hva = (uint64_t)GPA2HVA(vcpu->vm, gpa);
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}
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msr_write(MSR_IA32_BIOS_UPDT_TRIG,
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(uint64_t)ptr + sizeof(struct ucode_header));
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get_microcode_version();
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free(ucode_ptr);
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}
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