mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-06-02 04:15:31 +00:00
fb612904bf
microcode update from UOS is disabled. microcode version checking is available for both SOS and UOS. There are two TODOs of this patch: 1. This patch only update the uCode on pCPUs SOS owned. For the pCPUs not owned by SOS, the uCode is not updated. To handle this gap, we will have SOS own all pCPUs at boot time. So all pCPUs could have uCode updated. This will be handled in the patch to enable SOS own all pCPUs at boot time. 2. gva2gpa now doesn't check possible page table walk failure. Will add the failure check in gva2gpa in different patch. Signed-off-by: Yin Fengwei <fengwei.yin@intel.com> Reviewed-by: Anthony Xu (anthony.xu@intel.com) Acked-by: Eddie Dong <eddie.dong@intel.com> Acked-by: Tian, Kevin <kevin.tian@intel.com>
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <hv_lib.h>
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#include <acrn_common.h>
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#include <hv_arch.h>
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#include <hv_debug.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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native_cpuid_count(CPUID_FEATURES, 0, &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) ((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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