| Message ID | 1715632141-8089-1-git-send-email-haiyangz@microsoft.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [net-next] net: mana: Enable MANA driver on ARM64 with 4K page size | expand |
On Mon, 13 May 2024 13:29:01 -0700 Haiyang Zhang wrote: > - depends on PCI_MSI && X86_64 > + depends on PCI_MSI > + depends on X86_64 || (ARM64 && !CPU_BIG_ENDIAN && ARM64_4K_PAGES) Can ARM64 be big endian?
> -----Original Message----- > From: Jakub Kicinski <kuba@kernel.org> > Sent: Monday, May 13, 2024 4:42 PM > To: Haiyang Zhang <haiyangz@microsoft.com> > Cc: linux-hyperv@vger.kernel.org; netdev@vger.kernel.org; Dexuan Cui > <decui@microsoft.com>; stephen@networkplumber.org; KY Srinivasan > <kys@microsoft.com>; Paul Rosswurm <paulros@microsoft.com>; > olaf@aepfle.de; vkuznets <vkuznets@redhat.com>; davem@davemloft.net; > wei.liu@kernel.org; edumazet@google.com; pabeni@redhat.com; > leon@kernel.org; Long Li <longli@microsoft.com>; > ssengar@linux.microsoft.com; linux-rdma@vger.kernel.org; > daniel@iogearbox.net; john.fastabend@gmail.com; bpf@vger.kernel.org; > ast@kernel.org; hawk@kernel.org; tglx@linutronix.de; > shradhagupta@linux.microsoft.com; linux-kernel@vger.kernel.org > Subject: Re: [PATCH net-next] net: mana: Enable MANA driver on ARM64 with > 4K page size > > On Mon, 13 May 2024 13:29:01 -0700 Haiyang Zhang wrote: > > - depends on PCI_MSI && X86_64 > > + depends on PCI_MSI > > + depends on X86_64 || (ARM64 && !CPU_BIG_ENDIAN && ARM64_4K_PAGES) > > Can ARM64 be big endian? From the document, it can be: "ARM cores support both modes, but are most commonly used in, and typically default to little-endian mode. Most Linux distributions for ARM tend to be little-endian only." https://developer.arm.com/documentation/den0042/a/Coding-for-Cortex-R-Processors/Endianness MANA driver doesn't support big endian. Thanks, - Haiyang
On Mon, 13 May 2024 20:50:37 +0000 Haiyang Zhang wrote: > From the document, it can be: > "ARM cores support both modes, but are most commonly used in, and typically default to little-endian mode. Most Linux distributions for ARM tend to be little-endian only." > https://developer.arm.com/documentation/den0042/a/Coding-for-Cortex-R-Processors/Endianness > > MANA driver doesn't support big endian. Alright, but please prioritize at least adding the 64k page support. Linux drivers are supposed to be as platform independent as possible. If you use the right APIs you shouldn't have to worry about the endian or the page size.
Hello: This patch was applied to netdev/net-next.git (main) by Jakub Kicinski <kuba@kernel.org>: On Mon, 13 May 2024 13:29:01 -0700 you wrote: > Change the Kconfig dependency, so this driver can be built and run on ARM64 > with 4K page size. > 16/64K page sizes are not supported yet. > > Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> > --- > drivers/net/ethernet/microsoft/Kconfig | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) Here is the summary with links: - [net-next] net: mana: Enable MANA driver on ARM64 with 4K page size https://git.kernel.org/netdev/net-next/c/40a1d11fc670 You are awesome, thank you!
diff --git a/drivers/net/ethernet/microsoft/Kconfig b/drivers/net/ethernet/microsoft/Kconfig index 01eb7445ead9..286f0d5697a1 100644 --- a/drivers/net/ethernet/microsoft/Kconfig +++ b/drivers/net/ethernet/microsoft/Kconfig @@ -17,7 +17,8 @@ if NET_VENDOR_MICROSOFT config MICROSOFT_MANA tristate "Microsoft Azure Network Adapter (MANA) support" - depends on PCI_MSI && X86_64 + depends on PCI_MSI + depends on X86_64 || (ARM64 && !CPU_BIG_ENDIAN && ARM64_4K_PAGES) depends on PCI_HYPERV select AUXILIARY_BUS select PAGE_POOL
Change the Kconfig dependency, so this driver can be built and run on ARM64 with 4K page size. 16/64K page sizes are not supported yet. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> --- drivers/net/ethernet/microsoft/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)