Date: Fri, 19 Oct 2018 00:47:20 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r339438 - stable/11/sys/amd64/vmm Message-ID: <201810190047.w9J0lKt5037100@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: kib Date: Fri Oct 19 00:47:19 2018 New Revision: 339438 URL: https://svnweb.freebsd.org/changeset/base/339438 Log: MFC r339331: bhyve: emulate CLFLUSH and CLFLUSHOPT. Modified: stable/11/sys/amd64/vmm/vmm_instruction_emul.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/amd64/vmm/vmm_instruction_emul.c ============================================================================== --- stable/11/sys/amd64/vmm/vmm_instruction_emul.c Fri Oct 19 00:44:06 2018 (r339437) +++ stable/11/sys/amd64/vmm/vmm_instruction_emul.c Fri Oct 19 00:47:19 2018 (r339438) @@ -74,6 +74,7 @@ enum { VIE_OP_TYPE_GROUP1, VIE_OP_TYPE_STOS, VIE_OP_TYPE_BITTEST, + VIE_OP_TYPE_TWOB_GRP15, VIE_OP_TYPE_LAST }; @@ -85,6 +86,10 @@ enum { #define VIE_OP_F_NO_GLA_VERIFICATION (1 << 4) static const struct vie_op two_byte_opcodes[256] = { + [0xAE] = { + .op_byte = 0xAE, + .op_type = VIE_OP_TYPE_TWOB_GRP15, + }, [0xB6] = { .op_byte = 0xB6, .op_type = VIE_OP_TYPE_MOVZX, @@ -1441,6 +1446,37 @@ emulate_bittest(void *vm, int vcpuid, uint64_t gpa, st return (0); } +static int +emulate_twob_group15(void *vm, int vcpuid, uint64_t gpa, struct vie *vie, + mem_region_read_t memread, mem_region_write_t memwrite, void *memarg) +{ + int error; + uint64_t buf; + + switch (vie->reg & 7) { + case 0x7: /* CLFLUSH, CLFLUSHOPT, and SFENCE */ + if (vie->mod == 0x3) { + /* + * SFENCE. Ignore it, VM exit provides enough + * barriers on its own. + */ + error = 0; + } else { + /* + * CLFLUSH, CLFLUSHOPT. Only check for access + * rights. + */ + error = memread(vm, vcpuid, gpa, &buf, 1, memarg); + } + break; + default: + error = EINVAL; + break; + } + + return (error); +} + int vmm_emulate_instruction(void *vm, int vcpuid, uint64_t gpa, struct vie *vie, struct vm_guest_paging *paging, mem_region_read_t memread, @@ -1499,6 +1535,10 @@ vmm_emulate_instruction(void *vm, int vcpuid, uint64_t break; case VIE_OP_TYPE_BITTEST: error = emulate_bittest(vm, vcpuid, gpa, vie, + memread, memwrite, memarg); + break; + case VIE_OP_TYPE_TWOB_GRP15: + error = emulate_twob_group15(vm, vcpuid, gpa, vie, memread, memwrite, memarg); break; default:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201810190047.w9J0lKt5037100>