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https://github.com/projectacrn/acrn-hypervisor.git
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8787c06d3b
MISRA-C requires that there should be no unused parameters in functions. In some cases, we will keep the unused parameters. vmexit handler is one example. It is used as function pointer. Some of the vmexit handlers use the input parameter 'vcpu', some of them don't. We still need to keep the unused parameters 'vcpu' for those handlers don't use 'vcpu'. This patch removes the unused parameters that is not being used unconditionally. v1 -> v2: * remove the non-implemented API 'vlapic_id_write_handler' Tracked-On: #861 Signed-off-by: Shiqing Gao <shiqing.gao@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
86 lines
1.6 KiB
C
86 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 <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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#define CMOS_ADDR_PORT 0x70U
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#define CMOS_DATA_PORT 0x71U
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#define RTC_STATUSA 0x0AU /* status register A */
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#define RTCSA_TUP 0x80U /* time update, don't look now */
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static spinlock_t cmos_lock = { .head = 0U, .tail = 0U };
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static uint8_t cmos_read(uint8_t addr)
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{
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pio_write8(addr, CMOS_ADDR_PORT);
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return pio_read8(CMOS_DATA_PORT);
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}
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static bool cmos_update_in_progress(void)
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{
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return (cmos_read(RTC_STATUSA) & RTCSA_TUP)?1:0;
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}
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static uint8_t cmos_get_reg_val(uint8_t addr)
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{
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uint8_t reg;
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int tries = 2000U;
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spinlock_obtain(&cmos_lock);
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/* Make sure an update isn't in progress */
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while (cmos_update_in_progress() && tries--)
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;
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reg = cmos_read(addr);
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spinlock_release(&cmos_lock);
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return reg;
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}
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static uint32_t vrtc_read(struct vm *vm, uint16_t addr, __unused size_t width)
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{
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uint8_t reg;
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uint8_t offset;
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offset = vm->vrtc_offset;
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if (addr == CMOS_ADDR_PORT) {
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return vm->vrtc_offset;
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}
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reg = cmos_get_reg_val(offset);
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return reg;
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}
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static void vrtc_write(struct vm *vm, uint16_t addr, size_t width,
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uint32_t value)
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{
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if (width != 1U)
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return;
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if (addr == CMOS_ADDR_PORT) {
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vm->vrtc_offset = value & 0x7FU;
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}
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}
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void vrtc_init(struct vm *vm)
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{
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struct vm_io_range range = {
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.flags = IO_ATTR_RW, .base = CMOS_ADDR_PORT, .len = 2U};
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/* Initializing the CMOS RAM offset to 0U */
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vm->vrtc_offset = 0U;
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register_io_emulation_handler(vm, &range, vrtc_read, vrtc_write);
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}
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