diff options
Diffstat (limited to '0003-firmware-tegra-bpmp-Do-only-aligned-access-to-IPC-me.patch')
| -rw-r--r-- | 0003-firmware-tegra-bpmp-Do-only-aligned-access-to-IPC-me.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/0003-firmware-tegra-bpmp-Do-only-aligned-access-to-IPC-me.patch b/0003-firmware-tegra-bpmp-Do-only-aligned-access-to-IPC-me.patch new file mode 100644 index 000000000000..216708899a77 --- /dev/null +++ b/0003-firmware-tegra-bpmp-Do-only-aligned-access-to-IPC-me.patch @@ -0,0 +1,57 @@ +From 515af71adf3d5e05587c7bb27c1725c20cd259a0 Mon Sep 17 00:00:00 2001 +From: Timo Alho <talho@nvidia.com> +Date: Wed, 22 Jun 2022 16:22:59 +0300 +Subject: [PATCH 03/73] firmware: tegra: bpmp: Do only aligned access to IPC + memory area + +commit a4740b148a04dc60e14fe6a1dfe216d3bae214fd upstream. + +Use memcpy_toio and memcpy_fromio variants of memcpy to guarantee no +unaligned access to IPC memory area. This is to allow the IPC memory to +be mapped as Device memory to further suppress speculative reads from +happening within the 64 kB memory area above the IPC memory when 64 kB +memory pages are used. + +Signed-off-by: Timo Alho <talho@nvidia.com> +Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> +Signed-off-by: Thierry Reding <treding@nvidia.com> +Cc: Jon Hunter <jonathanh@nvidia.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/firmware/tegra/bpmp.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/drivers/firmware/tegra/bpmp.c b/drivers/firmware/tegra/bpmp.c +index 5654c5e9862b..037db21de510 100644 +--- a/drivers/firmware/tegra/bpmp.c ++++ b/drivers/firmware/tegra/bpmp.c +@@ -201,7 +201,7 @@ static ssize_t __tegra_bpmp_channel_read(struct tegra_bpmp_channel *channel, + int err; + + if (data && size > 0) +- memcpy(data, channel->ib->data, size); ++ memcpy_fromio(data, channel->ib->data, size); + + err = tegra_bpmp_ack_response(channel); + if (err < 0) +@@ -245,7 +245,7 @@ static ssize_t __tegra_bpmp_channel_write(struct tegra_bpmp_channel *channel, + channel->ob->flags = flags; + + if (data && size > 0) +- memcpy(channel->ob->data, data, size); ++ memcpy_toio(channel->ob->data, data, size); + + return tegra_bpmp_post_request(channel); + } +@@ -420,7 +420,7 @@ void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel, int code, + channel->ob->code = code; + + if (data && size > 0) +- memcpy(channel->ob->data, data, size); ++ memcpy_toio(channel->ob->data, data, size); + + err = tegra_bpmp_post_response(channel); + if (WARN_ON(err < 0)) +-- +2.37.3 + |