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X-Received-From: 2a00:1450:4864:20::344 Subject: [Qemu-devel] [PATCH v9 26/27] gdbstub: Add support to read a MSR for KVM target X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alex.bennee@linaro.org, Jon Doron Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" gdb> maint packet qqemu.kvm.Rdmsr:MsrIndex Signed-off-by: Jon Doron --- gdbstub.c | 38 +++++++++++++++++++++++++++++++++++++- 1 file changed, 37 insertions(+), 1 deletion(-) diff --git a/gdbstub.c b/gdbstub.c index 34da10260d..f48c3a2b5f 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -2141,7 +2141,14 @@ static void handle_query_attached(GdbCmdContext *gdb_ctx, void *user_ctx) static void handle_query_qemu_supported(GdbCmdContext *gdb_ctx, void *user_ctx) { - put_packet(gdb_ctx->s, "sstepbits;sstep;PhyMemMode"); + snprintf(gdb_ctx->str_buf, sizeof(gdb_ctx->str_buf), + "sstepbits;sstep;PhyMemMode"); + + if (kvm_enabled()) { + pstrcat(gdb_ctx->str_buf, sizeof(gdb_ctx->str_buf), ";kvm.Rdmsr"); + } + + put_packet(gdb_ctx->s, gdb_ctx->str_buf); } static void handle_query_qemu_phy_mem_mode(GdbCmdContext *gdb_ctx, @@ -2166,6 +2173,29 @@ static void handle_set_qemu_phy_mem_mode(GdbCmdContext *gdb_ctx, void *user_ctx) put_packet(gdb_ctx->s, "OK"); } +static void handle_query_kvm_read_msr(GdbCmdContext *gdb_ctx, void *user_ctx) +{ + uint64_t msr_val; + + if (!kvm_enabled()) { + return; + } + + if (!gdb_ctx->num_params) { + put_packet(gdb_ctx->s, "E22"); + return; + } + + if (kvm_arch_read_msr(gdbserver_state->c_cpu, gdb_ctx->params[0].val_ul, + &msr_val)) { + put_packet(gdb_ctx->s, "E00"); + return; + } + + snprintf(gdb_ctx->str_buf, sizeof(gdb_ctx->str_buf), "0x%" PRIx64, msr_val); + put_packet(gdb_ctx->s, gdb_ctx->str_buf); +} + static GdbCmdParseEntry gdb_gen_query_set_common_table[] = { /* Order is important if has same prefix */ { @@ -2250,6 +2280,12 @@ static GdbCmdParseEntry gdb_gen_query_table[] = { .handler = handle_query_qemu_phy_mem_mode, .cmd = "qemu.PhyMemMode", }, + { + .handler = handle_query_kvm_read_msr, + .cmd = "qemu.kvm.Rdmsr:", + .cmd_startswith = 1, + .schema = "l0" + }, }; static GdbCmdParseEntry gdb_gen_set_table[] = {