On Tue, Mar 18, 2025 at 4:02 PM Niklas Cassel <cassel@xxxxxxxxxx> wrote: > > Hello Huacai, > > On Wed, Mar 12, 2025 at 04:47:55PM +0100, Niklas Cassel wrote: > > On Wed, Mar 12, 2025 at 09:46:54PM +0800, Huacai Chen wrote: > > > We use CD/DVD drives under Marvell 88SE9215 SATA controller on many > > > Loongson-based machines. We found its PIO doesn't work well, and on the > > > opposite its DMA seems work very well. We don't know the detail of the > > > 88SE9215 SATA controller, but we have tested different CD/DVD drives > > > and they all have problems under 88SE9215 (but they all work well under > > > an Intel SATA controller). So we can define a new dedicated AHCI board > > > id named board_ahci_yes_fbs_atapi_dma for 88SE9215, and for this id we > > > set the AHCI_HFLAG_ATAPI_DMA_QUIRK and ATA_QUIRK_ATAPI_MOD16_DMA flags > > > on the SATA controller to prefer ATAPI DMA. > > > > This is a wall of text. > > > > Could you please use paragraphs? (with an empty line between paragraphs). > > > > (There can be multiple sentences in one paragraph.) > > > > This is a good example: > > > > commit 6bdbb73dc8d99fbb77f5db79dbb6f108708090b4 > > Author: Bibo Mao <maobibo@xxxxxxxxxxx> > > Date: Sat Mar 8 13:52:04 2025 +0800 > > > > LoongArch: KVM: Fix GPA size issue about VM > > > > Physical address space is 48 bit on Loongson-3A5000 physical machine, > > however it is 47 bit for VM on Loongson-3A5000 system. Size of physical > > address space of VM is the same with the size of virtual user space (a > > half) of physical machine. > > > > Variable cpu_vabits represents user address space, kernel address space > > is not included (user space and kernel space are both a half of total). > > Here cpu_vabits, rather than cpu_vabits - 1, is to represent the size of > > guest physical address space. > > > > Also there is strict checking about page fault GPA address, inject error > > if it is larger than maximum GPA address of VM. > > > > Cc: stable@xxxxxxxxxxxxxxx > > Signed-off-by: Bibo Mao <maobibo@xxxxxxxxxxx> > > Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx> > > > > > > > > Otherwise, this looks good to me. > > > If you want this patch to be queued up for 6.15, please send a new version > this week, because after this week, it will instead be queued up for 6.16. OK, I will send V4 today, sorry for the delay. Huacai > > > Kind regards, > Niklas
