[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 1/4] xl: Add support for ignore_msrs option
This option allows guest administrator specify what should happen when guest accesses an MSR which is not explicitly emulated by the hypervisor. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> --- docs/man/xl.cfg.5.pod.in | 20 +++++++++++++++++++- tools/libs/light/libxl_types.idl | 7 +++++++ tools/xl/xl_parse.c | 7 +++++++ 3 files changed, 33 insertions(+), 1 deletion(-) diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in index c8e017f950de..96ce97c42cab 100644 --- a/docs/man/xl.cfg.5.pod.in +++ b/docs/man/xl.cfg.5.pod.in @@ -2044,7 +2044,25 @@ Do not provide a VM generation ID. See also "Virtual Machine Generation ID" by Microsoft: L<https://docs.microsoft.com/en-us/windows/win32/hyperv_v2/virtual-machine-generation-identifier> -=back +=over + +=item B<ignore_msrs="STRING"> + +Determine hypervisor behavior on accesses to MSRs that are not emulated by the hypervisor. + +=over 4 + +=item B<never> + +Issue a warning to the log and #GP to the guest. This is default. + +=item B<silent> + +MSR reads return 0, MSR writes are ignored. No warnings to the log. + +=item B<verbose> + +Similar to B<silent> but a warning is written. =head3 Guest Virtual Time Controls diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_types.idl index 05324736b744..7b5fef771ee8 100644 --- a/tools/libs/light/libxl_types.idl +++ b/tools/libs/light/libxl_types.idl @@ -477,6 +477,12 @@ libxl_tee_type = Enumeration("tee_type", [ (1, "optee") ], init_val = "LIBXL_TEE_TYPE_NONE") +libxl_ignore_msrs = Enumeration("ignore_msrs", [ + (0, "never"), + (1, "silent"), + (2, "verbose"), + ], init_val = "LIBXL_IGNORE_MSRS_NEVER") + libxl_rdm_reserve = Struct("rdm_reserve", [ ("strategy", libxl_rdm_reserve_strategy), ("policy", libxl_rdm_reserve_policy), @@ -559,6 +565,7 @@ libxl_domain_build_info = Struct("domain_build_info",[ ("apic", libxl_defbool), ("dm_restrict", libxl_defbool), ("tee", libxl_tee_type), + ("ignore_msrs", libxl_ignore_msrs), ("u", KeyedUnion(None, libxl_domain_type, "type", [("hvm", Struct(None, [("firmware", string), ("bios", libxl_bios_type), diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c index 4ebf39620ae7..942086c3f41d 100644 --- a/tools/xl/xl_parse.c +++ b/tools/xl/xl_parse.c @@ -2732,6 +2732,13 @@ skip_usbdev: } } + if (!xlu_cfg_get_string(config, "ignore_msrs", &buf, 0)) { + if (libxl_ignore_msrs_from_string(buf, &b_info->ignore_msrs)) { + fprintf(stderr, "ERROR: invalid value \"%s\" for \"ignore_msrs\"\n", buf); + exit(1); + } + } + parse_vkb_list(config, d_config); xlu_cfg_get_defbool(config, "xend_suspend_evtchn_compat", -- 1.8.3.1
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