mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-05-08 16:36:58 +00:00
c6c1e42b79
Return value should be checked,fix it by add
"void" when the function return value is not used.
V1->V2:
replace printf with pr_warn.
V2->V3:
change the commit to make read easily.
Tracked-On:#861
Signed-off-by: Huihuang Shi <huihuang.shi@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
78 lines
1.6 KiB
C
78 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, ebx, ecx, edx;
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msr_write(MSR_IA32_BIOS_SIGN_ID, 0U);
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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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static inline size_t get_ucode_data_size(struct ucode_header *uhdr)
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{
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return ((uhdr->data_size != 0U) ? uhdr->data_size : 2000U);
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}
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void acrn_update_ucode(struct vcpu *vcpu, uint64_t v)
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{
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uint64_t gva, fault_addr;
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struct ucode_header uhdr;
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uint32_t data_page_num;
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size_t data_size;
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uint8_t *ucode_ptr;
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int err;
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uint32_t err_code;
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gva = v - sizeof(struct ucode_header);
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err_code = 0U;
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err = copy_from_gva(vcpu, &uhdr, gva, sizeof(uhdr), &err_code,
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&fault_addr);
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if (err < 0) {
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if (err == -EFAULT) {
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vcpu_inject_pf(vcpu, fault_addr, err_code);
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}
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return;
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}
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data_size = get_ucode_data_size(&uhdr) + sizeof(struct ucode_header);
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data_page_num =
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((data_size + CPU_PAGE_SIZE) - 1U) >> CPU_PAGE_SHIFT;
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ucode_ptr = alloc_pages(data_page_num);
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if (ucode_ptr == NULL) {
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return;
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}
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err_code = 0U;
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err = copy_from_gva(vcpu, ucode_ptr, gva, data_size, &err_code,
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&fault_addr);
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if (err < 0) {
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if (err == -EFAULT) {
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vcpu_inject_pf(vcpu, fault_addr, err_code);
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}
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return;
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}
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msr_write(MSR_IA32_BIOS_UPDT_TRIG,
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(uint64_t)ucode_ptr + sizeof(struct ucode_header));
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(void)get_microcode_version();
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free(ucode_ptr);
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}
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