From 574d96933ceff60b2d13fe97602572fc7e95f7c6 Mon Sep 17 00:00:00 2001 From: "Dr. David Alan Gilbert" Date: Fri, 12 Apr 2019 16:26:52 +0100 Subject: hmp: gva2gpa debug command Add a gva2gpa command purely for debug which performs address translation on the gva, the existing gpa2hva command can then also be used to find it in the qemu userspace; e.g. (qemu) info registers .... RSP=ffffffff81c03e98 .... (qemu) gva2gpa 0xffffffff81c03e98 gpa: 0x1c03e98 (qemu) gpa2hva 0x1c03e98 Host virtual address for 0x1c03e98 (pc.ram) is 0x7f0599a03e98 (qemu) x/10x 0xffffffff81c03e98 ffffffff81c03e98: 0x81c03eb8 0xffffffff 0x8101ea3f 0xffffffff ffffffff81c03ea8: 0x81d27b00 0xffffffff 0x00000000 0x00000000 ffffffff81c03eb8: 0x81c03ec8 0xffffffff gdb -p ...qemu... (gdb) x/10x 0x7f0599a03e98 0x7f0599a03e98: 0x81c03eb8 0xffffffff 0x8101ea3f 0xffffffff 0x7f0599a03ea8: 0x81d27b00 0xffffffff 0x00000000 0x00000000 0x7f0599a03eb8: 0x81c03ec8 0xffffffff Signed-off-by: Dr. David Alan Gilbert Message-Id: <20190412152652.827-1-dgilbert@redhat.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Dr. David Alan Gilbert --- hmp-commands.hx | 15 +++++++++++++++ monitor.c | 22 ++++++++++++++++++++++ tests/test-hmp.c | 1 + 3 files changed, 38 insertions(+) diff --git a/hmp-commands.hx b/hmp-commands.hx index 9b40359..a2c3ffc 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -588,6 +588,21 @@ is mapped. ETEXI { + .name = "gva2gpa", + .args_type = "addr:l", + .params = "addr", + .help = "print the guest physical address corresponding to a guest virtual address", + .cmd = hmp_gva2gpa, + }, + +STEXI +@item gva2gpa @var{addr} +@findex gva2gpa +Print the guest physical address at which the guest's virtual address @var{addr} +is mapped based on the mapping for the current CPU. +ETEXI + + { .name = "p|print", .args_type = "fmt:/,val:l", .params = "/fmt expr", diff --git a/monitor.c b/monitor.c index 9b5f10b..bb48997 100644 --- a/monitor.c +++ b/monitor.c @@ -1673,6 +1673,28 @@ static void hmp_gpa2hva(Monitor *mon, const QDict *qdict) memory_region_unref(mr); } +static void hmp_gva2gpa(Monitor *mon, const QDict *qdict) +{ + target_ulong addr = qdict_get_int(qdict, "addr"); + MemTxAttrs attrs; + CPUState *cs = mon_get_cpu(); + hwaddr gpa; + + if (!cs) { + monitor_printf(mon, "No cpu\n"); + return; + } + + gpa = cpu_get_phys_page_attrs_debug(mon_get_cpu(), + addr & TARGET_PAGE_MASK, &attrs); + if (gpa == -1) { + monitor_printf(mon, "Unmapped\n"); + } else { + monitor_printf(mon, "gpa: %#" HWADDR_PRIx "\n", + gpa + (addr & ~TARGET_PAGE_MASK)); + } +} + #ifdef CONFIG_LINUX static uint64_t vtop(void *ptr, Error **errp) { diff --git a/tests/test-hmp.c b/tests/test-hmp.c index 54a0182..e344947 100644 --- a/tests/test-hmp.c +++ b/tests/test-hmp.c @@ -39,6 +39,7 @@ static const char *hmp_cmds[] = { "dump-guest-memory /dev/null 0 4096", "dump-guest-memory /dev/null", "gdbserver", + "gva2gpa 0", "hostfwd_add tcp::43210-:43210", "hostfwd_remove tcp::43210-:43210", "i /w 0", -- cgit v1.1