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| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /Documentation/ABI/testing/sysfs-driver-aspeed-uart-routing | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-driver-aspeed-uart-routing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-aspeed-uart-routing | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-aspeed-uart-routing b/Documentation/ABI/testing/sysfs-driver-aspeed-uart-routing new file mode 100644 index 000000000..910df0e58 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-aspeed-uart-routing @@ -0,0 +1,27 @@ +What: /sys/bus/platform/drivers/aspeed-uart-routing/\*/uart\* +Date: September 2021 +Contact: Oskar Senft <osk@google.com> + Chia-Wei Wang <chiawei_wang@aspeedtech.com> +Description: Selects the RX source of the UARTx device. + + When read, each file shows the list of available options with currently + selected option marked by brackets "[]". The list of available options + depends on the selected file. + + e.g. + cat /sys/bus/platform/drivers/aspeed-uart-routing/\*.uart_routing/uart1 + [io1] io2 io3 io4 uart2 uart3 uart4 io6 + + In this case, UART1 gets its input from IO1 (physical serial port 1). + +Users: OpenBMC. Proposed changes should be mailed to + openbmc@lists.ozlabs.org + +What: /sys/bus/platform/drivers/aspeed-uart-routing/\*/io\* +Date: September 2021 +Contact: Oskar Senft <osk@google.com> + Chia-Wei Wang <chiawei_wang@aspeedtech.com> +Description: Selects the RX source of IOx serial port. The current selection + will be marked by brackets "[]". +Users: OpenBMC. Proposed changes should be mailed to + openbmc@lists.ozlabs.org |