tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ANDROID: virt: gunyah: Add addrspace_find_info_area hypercall

Browse Source 
Newer versions of Gunyah provide a mechanism to discover early-boot
configuration information. This information was previously
non-discoverable and was provided via devicetree patching by Gunyah. The
info area is a page allocated by the hypervisor and mapped into the
guest.

Bug: 395833312
Change-Id: I3dd4781f163d72c3826fcb4c354e4deda865efab
Signed-off-by: Elliot Berman <elliot.berman@oss.qualcomm.com>
This commit is contained in:
Elliot Berman
2025-01-24 14:19:07 -08:00
committed by Todd Kjos
parent aecad32996
commit ae558bb094
2 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm64/gunyah/gunyah_hypercall.c
+24
View File
@@ -45,6 +45,7 @@ EXPORT_SYMBOL_GPL(arch_is_gunyah_guest);
#define GUNYAH_HYPERCALL_ADDRSPACE_UNMAP GUNYAH_HYPERCALL(0x802C)
#define GUNYAH_HYPERCALL_MEMEXTENT_DONATE GUNYAH_HYPERCALL(0x8061)
#define GUNYAH_HYPERCALL_VCPU_RUN GUNYAH_HYPERCALL(0x8065)
#define GUNYAH_HYPERCALL_ADDRSPACE_FIND_INFO_AREA GUNYAH_HYPERCALL(0x806a)
/* clang-format on */
/**
@@ -275,5 +276,28 @@ gunyah_hypercall_vcpu_run(u64 capid, unsigned long *resume_data,
}
EXPORT_SYMBOL_GPL(gunyah_hypercall_vcpu_run);
/**
* gunyah_hypercall_addrspace_find_info_area() - Find the IPA and size of the info area
* @ipa: Filled with the IPA of the info area
* @size: Filled with the size of the info area
*
* See also:
* https://github.com/quic/gunyah-hypervisor/blob/develop/docs/api/gunyah_api.md#address-space-management
*/
enum gunyah_error
gunyah_hypercall_addrspace_find_info_area(unsigned long *ipa, unsigned long *size)
{
struct arm_smccc_res res;
arm_smccc_1_1_hvc(GUNYAH_HYPERCALL_ADDRSPACE_FIND_INFO_AREA, 0, &res);
if (res.a0 == GUNYAH_ERROR_OK) {
*ipa = res.a1;
*size = res.a2;
}
return res.a0;
}
EXPORT_SYMBOL_GPL(gunyah_hypercall_addrspace_find_info_area);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls");
include/linux/gunyah.h
+3
View File
@@ -480,4 +480,7 @@ enum gunyah_error
gunyah_hypercall_vcpu_run(u64 capid, unsigned long *resume_data,
struct gunyah_hypercall_vcpu_run_resp *resp);
enum gunyah_error
gunyah_hypercall_addrspace_find_info_area(unsigned long *ipa, unsigned long *size);
#endif