Re: [Xen-devel] [PATCH v3 1/2] arm/xen: vpl011: Fix the slow early console SBSA UART output

2017-10-25 Thread Stefano Stabellini
On Tue, 24 Oct 2017, Andre Przywara wrote: > From: Bhupinder Thakur > > The early console output uses pl011_early_write() to write data. This > function waits for BUSY bit to get cleared before writing the next byte. > > In the SBSA UART emulation logic, the BUSY

[Xen-devel] [PATCH v3 1/2] arm/xen: vpl011: Fix the slow early console SBSA UART output

2017-10-24 Thread Andre Przywara
From: Bhupinder Thakur The early console output uses pl011_early_write() to write data. This function waits for BUSY bit to get cleared before writing the next byte. In the SBSA UART emulation logic, the BUSY bit was set as soon one byte was written in the FIFO and