* [PATCH v2 1/5] x86: hv: hyperv-tlfs.h: Create and use Hyper-V page definitions
2019-06-06 8:00 [PATCH v2 0/5] hv: Remove dependencies on guest page size Maya Nakamura
@ 2019-06-06 8:03 ` Maya Nakamura
2019-06-12 10:36 ` Vitaly Kuznetsov
2019-06-06 8:05 ` [PATCH v2 2/5] x86: hv: hv_init.c: Add functions to allocate/deallocate page for Hyper-V Maya Nakamura
` (3 subsequent siblings)
4 siblings, 1 reply; 12+ messages in thread
From: Maya Nakamura @ 2019-06-06 8:03 UTC (permalink / raw)
To: mikelley, kys, haiyangz, sthemmin, sashal; +Cc: x86, linux-hyperv, linux-kernel
Define HV_HYP_PAGE_SHIFT, HV_HYP_PAGE_SIZE, and HV_HYP_PAGE_MASK because
the Linux guest page size and hypervisor page size concepts are
different, even though they happen to be the same value on x86.
Also, replace PAGE_SIZE with HV_HYP_PAGE_SIZE.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
---
arch/x86/include/asm/hyperv-tlfs.h | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index cdf44aa9a501..44bd68aefd00 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -12,6 +12,16 @@
#include <linux/types.h>
#include <asm/page.h>
+/*
+ * While not explicitly listed in the TLFS, Hyper-V always runs with a page size
+ * of 4096. These definitions are used when communicating with Hyper-V using
+ * guest physical pages and guest physical page addresses, since the guest page
+ * size may not be 4096 on all architectures.
+ */
+#define HV_HYP_PAGE_SHIFT 12
+#define HV_HYP_PAGE_SIZE BIT(HV_HYP_PAGE_SHIFT)
+#define HV_HYP_PAGE_MASK (~(HV_HYP_PAGE_SIZE - 1))
+
/*
* The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
* is set by CPUID(HvCpuIdFunctionVersionAndFeatures).
@@ -841,7 +851,7 @@ union hv_gpa_page_range {
* count is equal with how many entries of union hv_gpa_page_range can
* be populated into the input parameter page.
*/
-#define HV_MAX_FLUSH_REP_COUNT ((PAGE_SIZE - 2 * sizeof(u64)) / \
+#define HV_MAX_FLUSH_REP_COUNT ((HV_HYP_PAGE_SIZE - 2 * sizeof(u64)) / \
sizeof(union hv_gpa_page_range))
struct hv_guest_mapping_flush_list {
--
2.17.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH v2 1/5] x86: hv: hyperv-tlfs.h: Create and use Hyper-V page definitions
2019-06-06 8:03 ` [PATCH v2 1/5] x86: hv: hyperv-tlfs.h: Create and use Hyper-V page definitions Maya Nakamura
@ 2019-06-12 10:36 ` Vitaly Kuznetsov
0 siblings, 0 replies; 12+ messages in thread
From: Vitaly Kuznetsov @ 2019-06-12 10:36 UTC (permalink / raw)
To: Maya Nakamura
Cc: x86, linux-hyperv, linux-kernel, mikelley, kys, haiyangz,
sthemmin, sashal
Maya Nakamura <m.maya.nakamura@gmail.com> writes:
> Define HV_HYP_PAGE_SHIFT, HV_HYP_PAGE_SIZE, and HV_HYP_PAGE_MASK because
> the Linux guest page size and hypervisor page size concepts are
> different, even though they happen to be the same value on x86.
>
> Also, replace PAGE_SIZE with HV_HYP_PAGE_SIZE.
>
> Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
> ---
> arch/x86/include/asm/hyperv-tlfs.h | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
> index cdf44aa9a501..44bd68aefd00 100644
> --- a/arch/x86/include/asm/hyperv-tlfs.h
> +++ b/arch/x86/include/asm/hyperv-tlfs.h
> @@ -12,6 +12,16 @@
> #include <linux/types.h>
> #include <asm/page.h>
>
> +/*
> + * While not explicitly listed in the TLFS, Hyper-V always runs with a page size
> + * of 4096. These definitions are used when communicating with Hyper-V using
> + * guest physical pages and guest physical page addresses, since the guest page
> + * size may not be 4096 on all architectures.
> + */
> +#define HV_HYP_PAGE_SHIFT 12
> +#define HV_HYP_PAGE_SIZE BIT(HV_HYP_PAGE_SHIFT)
> +#define HV_HYP_PAGE_MASK (~(HV_HYP_PAGE_SIZE - 1))
> +
> /*
> * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
> * is set by CPUID(HvCpuIdFunctionVersionAndFeatures).
> @@ -841,7 +851,7 @@ union hv_gpa_page_range {
> * count is equal with how many entries of union hv_gpa_page_range can
> * be populated into the input parameter page.
> */
> -#define HV_MAX_FLUSH_REP_COUNT ((PAGE_SIZE - 2 * sizeof(u64)) / \
> +#define HV_MAX_FLUSH_REP_COUNT ((HV_HYP_PAGE_SIZE - 2 * sizeof(u64)) / \
> sizeof(union hv_gpa_page_range))
>
> struct hv_guest_mapping_flush_list {
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
--
Vitaly
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v2 2/5] x86: hv: hv_init.c: Add functions to allocate/deallocate page for Hyper-V
2019-06-06 8:00 [PATCH v2 0/5] hv: Remove dependencies on guest page size Maya Nakamura
2019-06-06 8:03 ` [PATCH v2 1/5] x86: hv: hyperv-tlfs.h: Create and use Hyper-V page definitions Maya Nakamura
@ 2019-06-06 8:05 ` Maya Nakamura
2019-06-12 10:36 ` Vitaly Kuznetsov
2019-06-06 8:06 ` [PATCH v2 3/5] hv: vmbus: Replace page definition with Hyper-V specific one Maya Nakamura
` (2 subsequent siblings)
4 siblings, 1 reply; 12+ messages in thread
From: Maya Nakamura @ 2019-06-06 8:05 UTC (permalink / raw)
To: mikelley, kys, haiyangz, sthemmin, sashal; +Cc: x86, linux-hyperv, linux-kernel
Introduce two new functions, hv_alloc_hyperv_page() and
hv_free_hyperv_page(), to allocate/deallocate memory with the size and
alignment that Hyper-V expects as a page. Although currently they are
not used, they are ready to be used to allocate/deallocate memory on x86
when their ARM64 counterparts are implemented, keeping symmetry between
architectures with potentially different guest page sizes.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
---
arch/x86/hyperv/hv_init.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index e4ba467a9fc6..84baf0e9a2d4 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -98,6 +98,20 @@ EXPORT_SYMBOL_GPL(hyperv_pcpu_input_arg);
u32 hv_max_vp_index;
EXPORT_SYMBOL_GPL(hv_max_vp_index);
+void *hv_alloc_hyperv_page(void)
+{
+ BUILD_BUG_ON(!(PAGE_SIZE == HV_HYP_PAGE_SIZE));
+
+ return (void *)__get_free_page(GFP_KERNEL);
+}
+EXPORT_SYMBOL_GPL(hv_alloc_hyperv_page);
+
+void hv_free_hyperv_page(unsigned long addr)
+{
+ free_page(addr);
+}
+EXPORT_SYMBOL_GPL(hv_free_hyperv_page);
+
static int hv_cpu_init(unsigned int cpu)
{
u64 msr_vp_index;
--
2.17.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH v2 2/5] x86: hv: hv_init.c: Add functions to allocate/deallocate page for Hyper-V
2019-06-06 8:05 ` [PATCH v2 2/5] x86: hv: hv_init.c: Add functions to allocate/deallocate page for Hyper-V Maya Nakamura
@ 2019-06-12 10:36 ` Vitaly Kuznetsov
2019-06-17 3:59 ` Maya Nakamura
0 siblings, 1 reply; 12+ messages in thread
From: Vitaly Kuznetsov @ 2019-06-12 10:36 UTC (permalink / raw)
To: Maya Nakamura
Cc: x86, linux-hyperv, linux-kernel, mikelley, kys, haiyangz,
sthemmin, sashal
Maya Nakamura <m.maya.nakamura@gmail.com> writes:
> Introduce two new functions, hv_alloc_hyperv_page() and
> hv_free_hyperv_page(), to allocate/deallocate memory with the size and
> alignment that Hyper-V expects as a page. Although currently they are
> not used, they are ready to be used to allocate/deallocate memory on x86
> when their ARM64 counterparts are implemented, keeping symmetry between
> architectures with potentially different guest page sizes.
>
> Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
> ---
> arch/x86/hyperv/hv_init.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
> index e4ba467a9fc6..84baf0e9a2d4 100644
> --- a/arch/x86/hyperv/hv_init.c
> +++ b/arch/x86/hyperv/hv_init.c
> @@ -98,6 +98,20 @@ EXPORT_SYMBOL_GPL(hyperv_pcpu_input_arg);
> u32 hv_max_vp_index;
> EXPORT_SYMBOL_GPL(hv_max_vp_index);
>
> +void *hv_alloc_hyperv_page(void)
> +{
> + BUILD_BUG_ON(!(PAGE_SIZE == HV_HYP_PAGE_SIZE));
(nit)
PAGE_SIZE != HV_HYP_PAGE_SIZE ?
> +
> + return (void *)__get_free_page(GFP_KERNEL);
> +}
> +EXPORT_SYMBOL_GPL(hv_alloc_hyperv_page);
> +
> +void hv_free_hyperv_page(unsigned long addr)
> +{
> + free_page(addr);
> +}
> +EXPORT_SYMBOL_GPL(hv_free_hyperv_page);
> +
> static int hv_cpu_init(unsigned int cpu)
> {
> u64 msr_vp_index;
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
--
Vitaly
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH v2 2/5] x86: hv: hv_init.c: Add functions to allocate/deallocate page for Hyper-V
2019-06-12 10:36 ` Vitaly Kuznetsov
@ 2019-06-17 3:59 ` Maya Nakamura
0 siblings, 0 replies; 12+ messages in thread
From: Maya Nakamura @ 2019-06-17 3:59 UTC (permalink / raw)
To: Vitaly Kuznetsov
Cc: x86, linux-hyperv, linux-kernel, mikelley, kys, haiyangz,
sthemmin, sashal
On Wed, Jun 12, 2019 at 12:36:47PM +0200, Vitaly Kuznetsov wrote:
> Maya Nakamura <m.maya.nakamura@gmail.com> writes:
>
> > Introduce two new functions, hv_alloc_hyperv_page() and
> > hv_free_hyperv_page(), to allocate/deallocate memory with the size and
> > alignment that Hyper-V expects as a page. Although currently they are
> > not used, they are ready to be used to allocate/deallocate memory on x86
> > when their ARM64 counterparts are implemented, keeping symmetry between
> > architectures with potentially different guest page sizes.
> >
> > Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
> > ---
> > arch/x86/hyperv/hv_init.c | 14 ++++++++++++++
> > 1 file changed, 14 insertions(+)
> >
> > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
> > index e4ba467a9fc6..84baf0e9a2d4 100644
> > --- a/arch/x86/hyperv/hv_init.c
> > +++ b/arch/x86/hyperv/hv_init.c
> > @@ -98,6 +98,20 @@ EXPORT_SYMBOL_GPL(hyperv_pcpu_input_arg);
> > u32 hv_max_vp_index;
> > EXPORT_SYMBOL_GPL(hv_max_vp_index);
> >
> > +void *hv_alloc_hyperv_page(void)
> > +{
> > + BUILD_BUG_ON(!(PAGE_SIZE == HV_HYP_PAGE_SIZE));
>
> (nit)
>
> PAGE_SIZE != HV_HYP_PAGE_SIZE ?
>
> > +
> > + return (void *)__get_free_page(GFP_KERNEL);
> > +}
> > +EXPORT_SYMBOL_GPL(hv_alloc_hyperv_page);
> > +
> > +void hv_free_hyperv_page(unsigned long addr)
> > +{
> > + free_page(addr);
> > +}
> > +EXPORT_SYMBOL_GPL(hv_free_hyperv_page);
> > +
> > static int hv_cpu_init(unsigned int cpu)
> > {
> > u64 msr_vp_index;
>
> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
>
> --
> Vitaly
Agreed. I will resubmit the patch set with this correction.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v2 3/5] hv: vmbus: Replace page definition with Hyper-V specific one
2019-06-06 8:00 [PATCH v2 0/5] hv: Remove dependencies on guest page size Maya Nakamura
2019-06-06 8:03 ` [PATCH v2 1/5] x86: hv: hyperv-tlfs.h: Create and use Hyper-V page definitions Maya Nakamura
2019-06-06 8:05 ` [PATCH v2 2/5] x86: hv: hv_init.c: Add functions to allocate/deallocate page for Hyper-V Maya Nakamura
@ 2019-06-06 8:06 ` Maya Nakamura
2019-06-12 10:38 ` Vitaly Kuznetsov
2019-06-06 8:07 ` [PATCH v2 4/5] HID: hv: Remove dependencies on PAGE_SIZE for ring buffer Maya Nakamura
2019-06-06 8:09 ` [PATCH v2 5/5] Input: " Maya Nakamura
4 siblings, 1 reply; 12+ messages in thread
From: Maya Nakamura @ 2019-06-06 8:06 UTC (permalink / raw)
To: mikelley, kys, haiyangz, sthemmin, sashal; +Cc: x86, linux-hyperv, linux-kernel
Replace PAGE_SIZE with HV_HYP_PAGE_SIZE because the guest page size may
not be 4096 on all architectures and Hyper-V always runs with a page
size of 4096.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
---
drivers/hv/hyperv_vmbus.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index e5467b821f41..5489b061d261 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -208,11 +208,11 @@ int hv_ringbuffer_read(struct vmbus_channel *channel,
u64 *requestid, bool raw);
/*
- * Maximum channels is determined by the size of the interrupt page
- * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
- * and the other is receive endpoint interrupt
+ * Maximum channels, 16348, is determined by the size of the interrupt page,
+ * which is HV_HYP_PAGE_SIZE. 1/2 of HV_HYP_PAGE_SIZE is to send endpoint
+ * interrupt, and the other is to receive endpoint interrupt.
*/
-#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
+#define MAX_NUM_CHANNELS ((HV_HYP_PAGE_SIZE >> 1) << 3)
/* The value here must be in multiple of 32 */
/* TODO: Need to make this configurable */
--
2.17.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH v2 3/5] hv: vmbus: Replace page definition with Hyper-V specific one
2019-06-06 8:06 ` [PATCH v2 3/5] hv: vmbus: Replace page definition with Hyper-V specific one Maya Nakamura
@ 2019-06-12 10:38 ` Vitaly Kuznetsov
0 siblings, 0 replies; 12+ messages in thread
From: Vitaly Kuznetsov @ 2019-06-12 10:38 UTC (permalink / raw)
To: Maya Nakamura
Cc: x86, linux-hyperv, linux-kernel, mikelley, kys, haiyangz,
sthemmin, sashal
Maya Nakamura <m.maya.nakamura@gmail.com> writes:
> Replace PAGE_SIZE with HV_HYP_PAGE_SIZE because the guest page size may
> not be 4096 on all architectures and Hyper-V always runs with a page
> size of 4096.
>
> Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
> ---
> drivers/hv/hyperv_vmbus.h | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
> index e5467b821f41..5489b061d261 100644
> --- a/drivers/hv/hyperv_vmbus.h
> +++ b/drivers/hv/hyperv_vmbus.h
> @@ -208,11 +208,11 @@ int hv_ringbuffer_read(struct vmbus_channel *channel,
> u64 *requestid, bool raw);
>
> /*
> - * Maximum channels is determined by the size of the interrupt page
> - * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
> - * and the other is receive endpoint interrupt
> + * Maximum channels, 16348, is determined by the size of the interrupt page,
> + * which is HV_HYP_PAGE_SIZE. 1/2 of HV_HYP_PAGE_SIZE is to send endpoint
> + * interrupt, and the other is to receive endpoint interrupt.
> */
> -#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
> +#define MAX_NUM_CHANNELS ((HV_HYP_PAGE_SIZE >> 1) << 3)
>
> /* The value here must be in multiple of 32 */
> /* TODO: Need to make this configurable */
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
--
Vitaly
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v2 4/5] HID: hv: Remove dependencies on PAGE_SIZE for ring buffer
2019-06-06 8:00 [PATCH v2 0/5] hv: Remove dependencies on guest page size Maya Nakamura
` (2 preceding siblings ...)
2019-06-06 8:06 ` [PATCH v2 3/5] hv: vmbus: Replace page definition with Hyper-V specific one Maya Nakamura
@ 2019-06-06 8:07 ` Maya Nakamura
2019-06-12 10:40 ` Vitaly Kuznetsov
2019-06-06 8:09 ` [PATCH v2 5/5] Input: " Maya Nakamura
4 siblings, 1 reply; 12+ messages in thread
From: Maya Nakamura @ 2019-06-06 8:07 UTC (permalink / raw)
To: mikelley, kys, haiyangz, sthemmin, sashal; +Cc: x86, linux-hyperv, linux-kernel
Define the ring buffer size as a constant expression because it should
not depend on the guest page size.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
---
drivers/hid/hid-hyperv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-hyperv.c b/drivers/hid/hid-hyperv.c
index d3311d714d35..e8b154fa38e2 100644
--- a/drivers/hid/hid-hyperv.c
+++ b/drivers/hid/hid-hyperv.c
@@ -112,8 +112,8 @@ struct synthhid_input_report {
#pragma pack(pop)
-#define INPUTVSC_SEND_RING_BUFFER_SIZE (10*PAGE_SIZE)
-#define INPUTVSC_RECV_RING_BUFFER_SIZE (10*PAGE_SIZE)
+#define INPUTVSC_SEND_RING_BUFFER_SIZE (40 * 1024)
+#define INPUTVSC_RECV_RING_BUFFER_SIZE (40 * 1024)
enum pipe_prot_msg_type {
--
2.17.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH v2 4/5] HID: hv: Remove dependencies on PAGE_SIZE for ring buffer
2019-06-06 8:07 ` [PATCH v2 4/5] HID: hv: Remove dependencies on PAGE_SIZE for ring buffer Maya Nakamura
@ 2019-06-12 10:40 ` Vitaly Kuznetsov
[not found] ` <BL0PR2101MB134877ED5DCB9F23033C92D9D7EF0@BL0PR2101MB1348.namprd21.prod.outlook.com>
0 siblings, 1 reply; 12+ messages in thread
From: Vitaly Kuznetsov @ 2019-06-12 10:40 UTC (permalink / raw)
To: Maya Nakamura
Cc: x86, linux-hyperv, linux-kernel, mikelley, kys, haiyangz,
sthemmin, sashal
Maya Nakamura <m.maya.nakamura@gmail.com> writes:
> Define the ring buffer size as a constant expression because it should
> not depend on the guest page size.
>
> Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
> ---
> drivers/hid/hid-hyperv.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hid/hid-hyperv.c b/drivers/hid/hid-hyperv.c
> index d3311d714d35..e8b154fa38e2 100644
> --- a/drivers/hid/hid-hyperv.c
> +++ b/drivers/hid/hid-hyperv.c
> @@ -112,8 +112,8 @@ struct synthhid_input_report {
>
> #pragma pack(pop)
>
> -#define INPUTVSC_SEND_RING_BUFFER_SIZE (10*PAGE_SIZE)
> -#define INPUTVSC_RECV_RING_BUFFER_SIZE (10*PAGE_SIZE)
> +#define INPUTVSC_SEND_RING_BUFFER_SIZE (40 * 1024)
> +#define INPUTVSC_RECV_RING_BUFFER_SIZE (40 * 1024)
>
My understanding is that this size is pretty arbitrary and as I see you
use it for hyperv-keyboard.c as well. It may make sense to have a
define, something like HYPERV_STD_RINGBUFFER_SIZE.
>
> enum pipe_prot_msg_type {
--
Vitaly
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v2 5/5] Input: hv: Remove dependencies on PAGE_SIZE for ring buffer
2019-06-06 8:00 [PATCH v2 0/5] hv: Remove dependencies on guest page size Maya Nakamura
` (3 preceding siblings ...)
2019-06-06 8:07 ` [PATCH v2 4/5] HID: hv: Remove dependencies on PAGE_SIZE for ring buffer Maya Nakamura
@ 2019-06-06 8:09 ` Maya Nakamura
4 siblings, 0 replies; 12+ messages in thread
From: Maya Nakamura @ 2019-06-06 8:09 UTC (permalink / raw)
To: mikelley, kys, haiyangz, sthemmin, sashal; +Cc: x86, linux-hyperv, linux-kernel
Define the ring buffer size as a constant expression because it should
not depend on the guest page size.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
---
drivers/input/serio/hyperv-keyboard.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/input/serio/hyperv-keyboard.c b/drivers/input/serio/hyperv-keyboard.c
index 7935e52b5435..a3480dbfadd2 100644
--- a/drivers/input/serio/hyperv-keyboard.c
+++ b/drivers/input/serio/hyperv-keyboard.c
@@ -83,8 +83,8 @@ struct synth_kbd_keystroke {
#define HK_MAXIMUM_MESSAGE_SIZE 256
-#define KBD_VSC_SEND_RING_BUFFER_SIZE (10 * PAGE_SIZE)
-#define KBD_VSC_RECV_RING_BUFFER_SIZE (10 * PAGE_SIZE)
+#define KBD_VSC_SEND_RING_BUFFER_SIZE (40 * 1024)
+#define KBD_VSC_RECV_RING_BUFFER_SIZE (40 * 1024)
#define XTKBD_EMUL0 0xe0
#define XTKBD_EMUL1 0xe1
--
2.17.1
^ permalink raw reply related [flat|nested] 12+ messages in thread