Date: Fri, 27 Jun 2014 18:00:39 +0000 (UTC) From: Neel Natu <neel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r267966 - head/usr.sbin/bhyve Message-ID: <201406271800.s5RI0dHr018023@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: neel Date: Fri Jun 27 18:00:38 2014 New Revision: 267966 URL: http://svnweb.freebsd.org/changeset/base/267966 Log: Add post-mortem debugging for "EPT Misconfiguration" VM-exit. This error is hard to reproduce so try to collect all the breadcrumbs when it happens. Reviewed by: grehan Modified: head/usr.sbin/bhyve/bhyverun.c Modified: head/usr.sbin/bhyve/bhyverun.c ============================================================================== --- head/usr.sbin/bhyve/bhyverun.c Fri Jun 27 17:50:33 2014 (r267965) +++ head/usr.sbin/bhyve/bhyverun.c Fri Jun 27 18:00:38 2014 (r267966) @@ -399,6 +399,16 @@ vmexit_spinup_ap(struct vmctx *ctx, stru return (retval); } +#define DEBUG_EPT_MISCONFIG +#ifdef DEBUG_EPT_MISCONFIG +#define EXIT_REASON_EPT_MISCONFIG 49 +#define VMCS_GUEST_PHYSICAL_ADDRESS 0x00002400 +#define VMCS_IDENT(x) ((x) | 0x80000000) + +static uint64_t ept_misconfig_gpa, ept_misconfig_pte[4]; +static int ept_misconfig_ptenum; +#endif + static int vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) { @@ -413,7 +423,21 @@ vmexit_vmx(struct vmctx *ctx, struct vm_ vmexit->u.vmx.exit_qualification); fprintf(stderr, "\tinst_type\t\t%d\n", vmexit->u.vmx.inst_type); fprintf(stderr, "\tinst_error\t\t%d\n", vmexit->u.vmx.inst_error); - +#ifdef DEBUG_EPT_MISCONFIG + if (vmexit->u.vmx.exit_reason == EXIT_REASON_EPT_MISCONFIG) { + vm_get_register(ctx, *pvcpu, + VMCS_IDENT(VMCS_GUEST_PHYSICAL_ADDRESS), + &ept_misconfig_gpa); + vm_get_gpa_pmap(ctx, ept_misconfig_gpa, ept_misconfig_pte, + &ept_misconfig_ptenum); + fprintf(stderr, "\tEPT misconfiguration:\n"); + fprintf(stderr, "\t\tGPA: %#lx\n", ept_misconfig_gpa); + fprintf(stderr, "\t\tPTE(%d): %#lx %#lx %#lx %#lx\n", + ept_misconfig_ptenum, ept_misconfig_pte[0], + ept_misconfig_pte[1], ept_misconfig_pte[2], + ept_misconfig_pte[3]); + } +#endif /* DEBUG_EPT_MISCONFIG */ return (VMEXIT_ABORT); }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201406271800.s5RI0dHr018023>