[kbuild-all] arch/mips/kvm/emulate.c:1734:28: warning: right shift count >= width of type

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0bddd227f3dc55975e2b8dfa7fc6f959b062a2c7 commit: dc6d95b153e78ed70b1b2c04aadffb76bcd2b3ec KVM: MIPS: Add more MMIO load/store instructions emulation date: 5 weeks ago config: mips-randconfig-r031-20200709 (attached as .config) compiler: mipsel-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout dc6d95b153e78ed70b1b2c04aadffb76bcd2b3ec # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): arch/mips/kvm/emulate.c:946:23: warning: no previous prototype for 'kvm_mips_emul_eret' [-Wmissing-prototypes] 946 | enum emulation_result kvm_mips_emul_eret(struct kvm_vcpu *vcpu) | ^~~~~~~~~~~~~~~~~~ arch/mips/kvm/emulate.c:1029:23: warning: no previous prototype for 'kvm_mips_emul_tlbr' [-Wmissing-prototypes] 1029 | enum emulation_result kvm_mips_emul_tlbr(struct kvm_vcpu *vcpu) | ^~~~~~~~~~~~~~~~~~ arch/mips/kvm/emulate.c:1102:23: warning: no previous prototype for 'kvm_mips_emul_tlbwi' [-Wmissing-prototypes] 1102 | enum emulation_result kvm_mips_emul_tlbwi(struct kvm_vcpu *vcpu) | ^~~~~~~~~~~~~~~~~~~ arch/mips/kvm/emulate.c:1138:23: warning: no previous prototype for 'kvm_mips_emul_tlbwr' [-Wmissing-prototypes] 1138 | enum emulation_result kvm_mips_emul_tlbwr(struct kvm_vcpu *vcpu) | ^~~~~~~~~~~~~~~~~~~ arch/mips/kvm/emulate.c:1163:23: warning: no previous prototype for 'kvm_mips_emul_tlbp' [-Wmissing-prototypes] 1163 | enum emulation_result kvm_mips_emul_tlbp(struct kvm_vcpu *vcpu) | ^~~~~~~~~~~~~~~~~~ arch/mips/kvm/emulate.c: In function 'kvm_mips_emulate_store': 1734 | ((vcpu->arch.gprs[rt] >> 56) & 0xff); | ^~ arch/mips/kvm/emulate.c:1738:28: warning: right shift count >= width of type [-Wshift-count-overflow] 1738 | ((vcpu->arch.gprs[rt] >> 48) & 0xffff); | ^~ arch/mips/kvm/emulate.c:1742:28: warning: right shift count >= width of type [-Wshift-count-overflow] 1742 | ((vcpu->arch.gprs[rt] >> 40) & 0xffffff); | ^~ arch/mips/kvm/emulate.c:1746:28: warning: right shift count >= width of type [-Wshift-count-overflow] 1746 | ((vcpu->arch.gprs[rt] >> 32) & 0xffffffff); | ^~ 1796 | (vcpu->arch.gprs[rt] << 32); | ^~ arch/mips/kvm/emulate.c:1800:27: warning: left shift count >= width of type [-Wshift-count-overflow] 1800 | (vcpu->arch.gprs[rt] << 40); | ^~ arch/mips/kvm/emulate.c:1804:27: warning: left shift count >= width of type [-Wshift-count-overflow] 1804 | (vcpu->arch.gprs[rt] << 48); | ^~ arch/mips/kvm/emulate.c:1808:27: warning: left shift count >= width of type [-Wshift-count-overflow] 1808 | (vcpu->arch.gprs[rt] << 56); | ^~ vim +1734 arch/mips/kvm/emulate.c 1637 1638 case sw_op: 1639 run->mmio.len = 4; 1640 *(u32 *)data = vcpu->arch.gprs[rt]; 1641 1642 kvm_debug("[%#lx] OP_SW: eaddr: %#lx, gpr: %#lx, data: %#x\n", 1643 vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, 1644 vcpu->arch.gprs[rt], *(u32 *)data); 1645 break; 1646 1647 case sh_op: 1648 run->mmio.len = 2; 1649 *(u16 *)data = vcpu->arch.gprs[rt]; 1650 1651 kvm_debug("[%#lx] OP_SH: eaddr: %#lx, gpr: %#lx, data: %#x\n", 1652 vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, 1653 vcpu->arch.gprs[rt], *(u16 *)data); 1654 break; 1655 1656 case sb_op: 1657 run->mmio.len = 1; 1658 *(u8 *)data = vcpu->arch.gprs[rt]; 1659 1660 kvm_debug("[%#lx] OP_SB: eaddr: %#lx, gpr: %#lx, data: %#x\n", 1661 vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, 1662 vcpu->arch.gprs[rt], *(u8 *)data); 1663 break; 1664 1665 case swl_op: 1666 run->mmio.phys_addr = kvm_mips_callbacks->gva_to_gpa( 1667 vcpu->arch.host_cp0_badvaddr) & (~0x3); 1668 run->mmio.len = 4; 1669 imme = vcpu->arch.host_cp0_badvaddr & 0x3; 1670 switch (imme) { 1671 case 0: 1672 *(u32 *)data = ((*(u32 *)data) & 0xffffff00) | 1673 (vcpu->arch.gprs[rt] >> 24); 1674 break; 1675 case 1: 1676 *(u32 *)data = ((*(u32 *)data) & 0xffff0000) | 1677 (vcpu->arch.gprs[rt] >> 16); 1678 break; 1679 case 2: 1680 *(u32 *)data = ((*(u32 *)data) & 0xff000000) | 1681 (vcpu->arch.gprs[rt] >> 8); 1682 break; 1683 case 3: 1684 *(u32 *)data = vcpu->arch.gprs[rt]; 1685 break; 1686 default: 1687 break; 1688 } 1689 1690 kvm_debug("[%#lx] OP_SWL: eaddr: %#lx, gpr: %#lx, data: %#x\n", 1691 vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, 1692 vcpu->arch.gprs[rt], *(u32 *)data); 1693 break; 1694 1695 case swr_op: 1696 run->mmio.phys_addr = kvm_mips_callbacks->gva_to_gpa( 1697 vcpu->arch.host_cp0_badvaddr) & (~0x3); 1698 run->mmio.len = 4; 1699 imme = vcpu->arch.host_cp0_badvaddr & 0x3; 1700 switch (imme) { 1701 case 0: 1702 *(u32 *)data = vcpu->arch.gprs[rt]; 1703 break; 1704 case 1: 1705 *(u32 *)data = ((*(u32 *)data) & 0xff) | 1706 (vcpu->arch.gprs[rt] << 8); 1707 break; 1708 case 2: 1709 *(u32 *)data = ((*(u32 *)data) & 0xffff) | 1710 (vcpu->arch.gprs[rt] << 16); 1711 break; 1712 case 3: 1713 *(u32 *)data = ((*(u32 *)data) & 0xffffff) | 1714 (vcpu->arch.gprs[rt] << 24); 1715 break; 1716 default: 1717 break; 1718 } 1719 1720 kvm_debug("[%#lx] OP_SWR: eaddr: %#lx, gpr: %#lx, data: %#x\n", 1721 vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, 1722 vcpu->arch.gprs[rt], *(u32 *)data); 1723 break; 1724 1725 case sdl_op: 1726 run->mmio.phys_addr = kvm_mips_callbacks->gva_to_gpa( 1727 vcpu->arch.host_cp0_badvaddr) & (~0x7); 1728 1729 run->mmio.len = 8; 1730 imme = vcpu->arch.host_cp0_badvaddr & 0x7; 1731 switch (imme) { 1732 case 0: 1733 *(u64 *)data = ((*(u64 *)data) & 0xffffffffffffff00) | 1735 break; 1736 case 1: 1737 *(u64 *)data = ((*(u64 *)data) & 0xffffffffffff0000) | 1739 break; 1740 case 2: 1741 *(u64 *)data = ((*(u64 *)data) & 0xffffffffff000000) | 1742 ((vcpu->arch.gprs[rt] >> 40) & 0xffffff); 1743 break; 1744 case 3: 1745 *(u64 *)data = ((*(u64 *)data) & 0xffffffff00000000) | 1746 ((vcpu->arch.gprs[rt] >> 32) & 0xffffffff); 1747 break; 1748 case 4: 1749 *(u64 *)data = ((*(u64 *)data) & 0xffffff0000000000) | 1750 ((vcpu->arch.gprs[rt] >> 24) & 0xffffffffff); 1751 break; 1752 case 5: 1753 *(u64 *)data = ((*(u64 *)data) & 0xffff000000000000) | 1754 ((vcpu->arch.gprs[rt] >> 16) & 0xffffffffffff); 1755 break; 1756 case 6: 1757 *(u64 *)data = ((*(u64 *)data) & 0xff00000000000000) | 1758 ((vcpu->arch.gprs[rt] >> 8) & 0xffffffffffffff); 1759 break; 1760 case 7: 1761 *(u64 *)data = vcpu->arch.gprs[rt]; 1762 break; 1763 default: 1764 break; 1765 } 1766 1767 kvm_debug("[%#lx] OP_SDL: eaddr: %#lx, gpr: %#lx, data: %llx\n", 1768 vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, 1769 vcpu->arch.gprs[rt], *(u64 *)data); 1770 break; 1771 1772 case sdr_op: 1773 run->mmio.phys_addr = kvm_mips_callbacks->gva_to_gpa( 1774 vcpu->arch.host_cp0_badvaddr) & (~0x7); 1775 1776 run->mmio.len = 8; 1777 imme = vcpu->arch.host_cp0_badvaddr & 0x7; 1778 switch (imme) { 1779 case 0: 1780 *(u64 *)data = vcpu->arch.gprs[rt]; 1781 break; 1782 case 1: 1783 *(u64 *)data = ((*(u64 *)data) & 0xff) | 1784 (vcpu->arch.gprs[rt] << 8); 1785 break; 1786 case 2: 1787 *(u64 *)data = ((*(u64 *)data) & 0xffff) | 1788 (vcpu->arch.gprs[rt] << 16); 1789 break; 1790 case 3: 1791 *(u64 *)data = ((*(u64 *)data) & 0xffffff) | 1792 (vcpu->arch.gprs[rt] << 24); 1793 break; 1794 case 4: 1795 *(u64 *)data = ((*(u64 *)data) & 0xffffffff) | 1797 break; 1798 case 5: 1799 *(u64 *)data = ((*(u64 *)data) & 0xffffffffff) | 1800 (vcpu->arch.gprs[rt] << 40); 1801 break; 1802 case 6: 1803 *(u64 *)data = ((*(u64 *)data) & 0xffffffffffff) | 1804 (vcpu->arch.gprs[rt] << 48); 1805 break; 1806 case 7: 1807 *(u64 *)data = ((*(u64 *)data) & 0xffffffffffffff) | 1808 (vcpu->arch.gprs[rt] << 56); 1809 break; 1810 default: 1811 break; 1812 } 1813 1814 kvm_debug("[%#lx] OP_SDR: eaddr: %#lx, gpr: %#lx, data: %llx\n", 1815 vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, 1816 vcpu->arch.gprs[rt], *(u64 *)data); 1817 break; 1818 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org