diff options
| author | Juergen Gross <jgross@suse.com> | 2025-08-15 09:40:52 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2025-08-20 15:47:43 +0200 |
| commit | efdaa61d73a1deb066ccc3b4d56257cc63ab5be9 (patch) | |
| tree | cec724b99125fb99c0c537e767642d6d9ebb6a4d | |
| parent | 8ea815399c3fcce1889bd951fec25b5b9a3979c1 (diff) | |
drivers/xen/xenbus: remove quirk for Xen 3.x
The kernel is not supported to run as a Xen guest on Xen versions
older than 4.0.
Remove xen_strict_xenbus_quirk() which is testing the Xen version to be
at least 4.0.
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Jason Andryuk <jason.andryuk@amd.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <20250815074052.13792-1-jgross@suse.com>
| -rw-r--r-- | drivers/xen/xenbus/xenbus_xs.c | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c index 3c9da446b85d..528682bf0c7f 100644 --- a/drivers/xen/xenbus/xenbus_xs.c +++ b/drivers/xen/xenbus/xenbus_xs.c @@ -718,26 +718,6 @@ int xs_watch_msg(struct xs_watch_event *event) return 0; } -/* - * Certain older XenBus toolstack cannot handle reading values that are - * not populated. Some Xen 3.4 installation are incapable of doing this - * so if we are running on anything older than 4 do not attempt to read - * control/platform-feature-xs_reset_watches. - */ -static bool xen_strict_xenbus_quirk(void) -{ -#ifdef CONFIG_X86 - uint32_t eax, ebx, ecx, edx, base; - - base = xen_cpuid_base(); - cpuid(base + 1, &eax, &ebx, &ecx, &edx); - - if ((eax >> 16) < 4) - return true; -#endif - return false; - -} static void xs_reset_watches(void) { int err; @@ -745,9 +725,6 @@ static void xs_reset_watches(void) if (!xen_hvm_domain() || xen_initial_domain()) return; - if (xen_strict_xenbus_quirk()) - return; - if (!xenbus_read_unsigned("control", "platform-feature-xs_reset_watches", 0)) return; |