On 2025/03/11 9:42, Jason Wang wrote:
On Mon, Mar 10, 2025 at 3:04 PM Akihiko Odaki wrote:
On 2025/03/10 13:43, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:02 PM Akihiko Odaki wrote:
VIRTIO_NET_F_HASH_REPORT allows to report hash values calculated on the
host. When VHOST_NET_F_VIRTIO_NET_HD
On 2025/03/10 13:03, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:02 PM Akihiko Odaki wrote:
The added tests confirm tun can perform RSS and hash reporting, and
reject invalid configurations for them.
Let's be more verbose here. E.g what's the network topology used here.
The network topology
On 2025/03/11 9:38, Jason Wang wrote:
On Mon, Mar 10, 2025 at 3:45 PM Akihiko Odaki wrote:
On 2025/03/10 12:55, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki wrote:
Hash reporting
==
Allow the guest to reuse the hash value to make receive steering
consistent b
On 2025/03/11 9:38, Jason Wang wrote:
On Mon, Mar 10, 2025 at 3:45 PM Akihiko Odaki wrote:
On 2025/03/10 12:55, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki wrote:
Hash reporting
==
Allow the guest to reuse the hash value to make receive steering
consistent b
On 2025/03/11 9:47, Jason Wang wrote:
On Mon, Mar 10, 2025 at 2:53 PM Akihiko Odaki wrote:
On 2025/03/10 12:55, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki wrote:
They are useful to implement VIRTIO_NET_F_RSS and
VIRTIO_NET_F_HASH_REPORT.
Signed-off-by: Akihiko Odaki
T
On Mon, 10 Mar 2025 18:00:51 +0800 Lei Yang wrote:
> QE tested this series with virtio-net regression tests, everything works fine.
>
> Tested-by: Lei Yang
It's a bit unclear to me what exactly you tested here
and why you chose this patch set..
If you have a set of automated tests integrating
Split the code that check for the uniformity of misaligned accesses
performance on all cpus from check_unaligned_access_emulated_all_cpus()
to its own function which will be used for delegation check. No
functional changes intended.
Signed-off-by: Clément Léger
---
arch/riscv/kernel/traps_misali
On Mon, Mar 10, 2025 at 2:53 PM Akihiko Odaki wrote:
>
> On 2025/03/10 12:55, Jason Wang wrote:
> > On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki
> > wrote:
> >>
> >> They are useful to implement VIRTIO_NET_F_RSS and
> >> VIRTIO_NET_F_HASH_REPORT.
> >>
> >> Signed-off-by: Akihiko Odaki
> >> Test
On Mon, Mar 10, 2025 at 3:04 PM Akihiko Odaki wrote:
>
> On 2025/03/10 13:43, Jason Wang wrote:
> > On Fri, Mar 7, 2025 at 7:02 PM Akihiko Odaki
> > wrote:
> >>
> >> VIRTIO_NET_F_HASH_REPORT allows to report hash values calculated on the
> >> host. When VHOST_NET_F_VIRTIO_NET_HDR is employed, it
On Mon, Mar 10, 2025 at 3:59 PM Akihiko Odaki wrote:
>
> On 2025/03/10 12:55, Jason Wang wrote:
> > On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki
> > wrote:
> >>
> >> Hash reporting
> >> ==
> >>
> >> Allow the guest to reuse the hash value to make receive steering
> >> consistent betw
On Mon, Mar 10, 2025 at 3:45 PM Akihiko Odaki wrote:
>
> On 2025/03/10 12:55, Jason Wang wrote:
> > On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki
> > wrote:
> >>
> >> Hash reporting
> >> ==
> >>
> >> Allow the guest to reuse the hash value to make receive steering
> >> consistent betw
Adding documentation on shadow stack for user mode on riscv and kernel
interfaces exposed so that user tasks can enable it.
Signed-off-by: Deepak Gupta
---
Documentation/arch/riscv/index.rst | 1 +
Documentation/arch/riscv/zicfiss.rst | 176 +++
2 files change
This patch implements creating shadow stack pte (on riscv). Creating
shadow stack PTE on riscv means that clearing RWX and then setting W=1.
Signed-off-by: Deepak Gupta
Reviewed-by: Alexandre Ghiti
---
arch/riscv/include/asm/pgtable.h | 10 ++
1 file changed, 10 insertions(+)
diff --gi
schedule_on_each_cpu() was used without any good reason while documented
as very slow. This call was in the boot path, so better use
on_each_cpu() for scalar misaligned checking. Vector misaligned check
still needs to use schedule_on_each_cpu() since it requires irqs to be
enabled but that's less o
VM_HIGH_ARCH_5 is used for riscv
Signed-off-by: Deepak Gupta
---
include/linux/mm.h | 7 +++
1 file changed, 7 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7b1068ddcbb7..1ef231cbc8fe 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -378,6 +378,13 @@ ex
zicfiss and zicfilp extension gets enabled via b3 and b2 in *envcfg CSR.
menvcfg controls enabling for S/HS mode. henvcfg control enabling for VS
while senvcfg controls enabling for U/VU mode.
zicfilp extension extends *status CSR to hold `expected landing pad` bit.
A trap or interrupt can occur b
misaligned accesses traps are not nmi and should be treated as normal
one using irqentry_enter()/exit(). Since both load/store and user/kernel
should use almost the same path and that we are going to add some code
around that, factorize it.
Signed-off-by: Clément Léger
---
arch/riscv/kernel/trap
`fork` implements copy on write (COW) by making pages readonly in child
and parent both.
ptep_set_wrprotect and pte_wrprotect clears _PAGE_WRITE in PTE.
Assumption is that page is readable and on fault copy on write happens.
To implement COW on shadow stack pages, clearing up W bit makes them XWR
Basics and overview
===
Software with larger attack surfaces (e.g. network facing apps like databases,
browsers or apps relying on browser runtimes) suffer from memory corruption
issues which can be utilized by attackers to bend control flow of the program
to eventually gain contro
Carves out space in arch specific thread struct for cfi status and shadow
stack in usermode on riscv.
This patch does following
- defines a new structure cfi_status with status bit for cfi feature
- defines shadow stack pointer, base and size in cfi_status structure
- defines offsets to new member
On 2025/03/10 13:01, Jason Wang wrote:
On Mon, Mar 10, 2025 at 11:55 AM Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki wrote:
Hash reporting
==
Allow the guest to reuse the hash value to make receive steering
consistent between the host and guest, and to save ha
On 2025/03/10 13:43, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:02 PM Akihiko Odaki wrote:
VIRTIO_NET_F_HASH_REPORT allows to report hash values calculated on the
host. When VHOST_NET_F_VIRTIO_NET_HDR is employed, it will report no
hash values (i.e., the hash_report member is always set to
VIR
On 2025/03/10 12:55, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki wrote:
Hash reporting
==
Allow the guest to reuse the hash value to make receive steering
consistent between the host and guest, and to save hash computation.
RSS
===
RSS is a receive steering al
> -Original Message-
> From: Song, Yoong Siang
> Sent: Friday, March 7, 2025 3:21 PM
>
> On Friday, March 7, 2025 9:25 PM, Bouska, Zdenek
> wrote:
>
> [...]
>
> >> @@ -2996,7 +3035,13 @@ static void igc_xdp_xmit_zc(struct igc_ring *ring)
> >>ntu = ring->next_to_use;
> >>budget
On 2025/03/10 12:55, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki wrote:
Hash reporting
==
Allow the guest to reuse the hash value to make receive steering
consistent between the host and guest, and to save hash computation.
RSS
===
RSS is a receive steering al
On 2025/03/10 12:55, Jason Wang wrote:
On Fri, Mar 7, 2025 at 7:01 PM Akihiko Odaki wrote:
Hash reporting
==
Allow the guest to reuse the hash value to make receive steering
consistent between the host and guest, and to save hash computation.
RSS
===
RSS is a receive steering al
On 2025/03/09 4:32, Willem de Bruijn wrote:
Akihiko Odaki wrote:
Hash reporting
==
Allow the guest to reuse the hash value to make receive steering
consistent between the host and guest, and to save hash computation.
RSS
===
RSS is a receive steering algorithm that can be negotiat
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